1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5PB2.c
*
* Purpose: Re-implementation of the page buffer with added features to
* support VFD SWMR.
* JRM -- 10/11/18
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5F_FRIEND /* suppress error about including H5Fpkg */
#include "H5PBmodule.h" /* This source code file is part of the
* H5PB module
*/
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* Files */
#include "H5FDprivate.h" /* File drivers */
#include "H5Iprivate.h" /* IDs */
#include "H5FLprivate.h" /* Free lists */
#include "H5MMprivate.h" /* Memory management */
#include "H5PBpkg.h" /* File access */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
static H5PB_entry_t * H5PB__allocate_page(H5PB_t *pb_ptr, size_t buf_size,
hbool_t clean_image);
static herr_t H5PB__create_new_page(H5PB_t *pb_ptr, haddr_t addr, size_t size,
H5FD_mem_t type, hbool_t clean_image, H5PB_entry_t **entry_ptr_ptr);
static void H5PB__deallocate_page(H5PB_entry_t *entry_ptr);
static herr_t H5PB__evict_entry(H5PB_t *pb_ptr, H5PB_entry_t *entry_ptr,
hbool_t force);
static herr_t H5PB__flush_entry(H5F_t *f, H5PB_t *pb_ptr,
H5PB_entry_t *entry_ptr);
static herr_t H5PB__load_page(H5F_t *f, H5PB_t *pb_ptr, haddr_t addr,
H5FD_mem_t type, H5PB_entry_t **entry_ptr_ptr);
static herr_t H5PB__make_space(H5F_t *f, H5PB_t *pb_ptr,
H5FD_mem_t inserted_type);
static herr_t H5PB__mark_entry_clean(H5PB_t *pb_ptr,
H5PB_entry_t *entry_ptr);
static herr_t H5PB__mark_entry_dirty(H5F_t * f, H5PB_t *pb_ptr,
H5PB_entry_t *entry_ptr);
static herr_t H5PB__read_meta(H5F_t *f, H5FD_mem_t type, haddr_t addr,
size_t size, void *buf/*out*/);
static herr_t H5PB__read_raw(H5F_t *f, H5FD_mem_t type, haddr_t addr,
size_t size, void *buf/*out*/);
static herr_t H5PB__write_meta(H5F_t *f, H5FD_mem_t type, haddr_t addr,
size_t size, const void *buf/*out*/);
static herr_t H5PB__write_raw(H5F_t *f, H5FD_mem_t type, haddr_t addr,
size_t size, const void *buf/*out*/);
static void ldbgf(const char *, ...) H5_ATTR_FORMAT(printf, 1, 2);
/*********************/
/* Package Variables */
/*********************/
/* Package initialization variable */
hbool_t H5_PKG_INIT_VAR = FALSE;
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare a free list to manage the H5PB_t struct */
H5FL_DEFINE_STATIC(H5PB_t);
/* Declare a free list to manage the H5PB_entry_t struct */
H5FL_DEFINE_STATIC(H5PB_entry_t);
static const bool ldbg_enabled = false;
static void
ldbgf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (!ldbg_enabled)
return;
(void)vprintf(fmt, ap);
va_end(ap);
}
/*-------------------------------------------------------------------------
*
* Function: H5PB_reset_stats
*
* Purpose: Reset statistics collected for the page buffer layer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_reset_stats(H5PB_t *pb_ptr)
{
int i;
FUNC_ENTER_NOAPI_NOERR
/* Sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
for ( i = 0; i < H5PB__NUM_STAT_TYPES; i++ ) {
pb_ptr->bypasses[i] = 0;
pb_ptr->accesses[i] = 0;
pb_ptr->hits[i] = 0;
pb_ptr->misses[i] = 0;
pb_ptr->loads[i] = 0;
pb_ptr->insertions[i] = 0;
pb_ptr->flushes[i] = 0;
pb_ptr->evictions[i] = 0;
pb_ptr->clears[i] = 0;
}
pb_ptr->max_lru_len = 0;
pb_ptr->max_lru_size = 0;
pb_ptr->lru_md_skips = 0;
pb_ptr->lru_rd_skips = 0;
pb_ptr->total_ht_insertions = 0;
pb_ptr->total_ht_deletions = 0;
pb_ptr->successful_ht_searches = 0;
pb_ptr->total_successful_ht_search_depth = 0;
pb_ptr->failed_ht_searches = 0;
pb_ptr->total_failed_ht_search_depth = 0;
pb_ptr->max_index_len = 0;
pb_ptr->max_clean_index_len = 0;
pb_ptr->max_dirty_index_len = 0;
pb_ptr->max_clean_index_size = 0;
pb_ptr->max_dirty_index_size = 0;
pb_ptr->max_index_size = 0;
pb_ptr->max_rd_pages = 0;
pb_ptr->max_md_pages = 0;
pb_ptr->max_mpmde_count = 0;
pb_ptr->lru_tl_skips = 0;
pb_ptr->max_tl_len = 0;
pb_ptr->max_tl_size = 0;
pb_ptr->delayed_writes = 0;
pb_ptr->total_delay = 0;
pb_ptr->max_dwl_len = 0;
pb_ptr->max_dwl_size = 0;
pb_ptr->total_dwl_ins_depth = 0;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5PB_reset_stats() */
/*-------------------------------------------------------------------------
* Function: H5PB_get_stats
*
* Purpose: This function was created without documentation.
* What follows is my best understanding of Mohamad's intent.
*
* Retrieve statistics collected about page accesses for the
* page buffer layer.
*
* --accesses: the number of metadata and raw data accesses
* to the page buffer layer
*
* --hits: the number of metadata and raw data hits in
* the page buffer layer
*
* --misses: the number of metadata and raw data misses in
* the page buffer layer
*
* --evictions: the number of metadata and raw data evictions
* from the page buffer layer
*
* --bypasses: the number of metadata and raw data accesses
* that bypass the page buffer layer
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Mohamad Chaarawi
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_get_stats(const H5PB_t *pb_ptr, unsigned accesses[2], unsigned hits[2],
unsigned misses[2], unsigned evictions[2], unsigned bypasses[2])
{
FUNC_ENTER_NOAPI_NOERR
/* Sanity checks */
HDassert(pb_ptr);
accesses[0] = (unsigned)pb_ptr->accesses[0];
accesses[1] = (unsigned)pb_ptr->accesses[1];
accesses[2] = (unsigned)pb_ptr->accesses[2];
hits[0] = (unsigned)pb_ptr->hits[0];
hits[1] = (unsigned)pb_ptr->hits[1];
hits[2] = (unsigned)pb_ptr->hits[2];
misses[0] = (unsigned)pb_ptr->misses[0];
misses[1] = (unsigned)pb_ptr->misses[1];
misses[2] = (unsigned)pb_ptr->misses[2];
evictions[0] = (unsigned)pb_ptr->evictions[0];
evictions[1] = (unsigned)pb_ptr->evictions[1];
evictions[2] = (unsigned)pb_ptr->evictions[2];
bypasses[0] = (unsigned)pb_ptr->bypasses[0];
bypasses[1] = (unsigned)pb_ptr->bypasses[1];
bypasses[2] = (unsigned)pb_ptr->bypasses[2];
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5PB_get_stats */
/*-------------------------------------------------------------------------
*
* Function: H5PB_print_stats()
*
* Purpose: Print out statistics collected for the page buffer layer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_print_stats(const H5PB_t *pb_ptr)
{
double ave_succ_search_depth = 0.0L;
double ave_failed_search_depth = 0.0L;
double ave_delayed_write = 0.0L;
double ave_delayed_write_ins_depth = 0.0L;
FUNC_ENTER_NOAPI_NOINIT_NOERR
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDfprintf(stdout, "\n\nPage Buffer Statistics (raw/meta/mpmde): \n\n");
HDfprintf(stdout, "bypasses = %lld (%lld/%lld/%lld)\n",
(pb_ptr->bypasses[0] + pb_ptr->bypasses[1] + pb_ptr->bypasses[2]),
pb_ptr->bypasses[0], pb_ptr->bypasses[1], pb_ptr->bypasses[2]);
HDfprintf(stdout, "acesses = %lld (%lld/%lld/%lld)\n",
(pb_ptr->accesses[0] + pb_ptr->accesses[1] + pb_ptr->accesses[2]),
pb_ptr->accesses[0], pb_ptr->accesses[1], pb_ptr->accesses[2]);
HDfprintf(stdout, "hits = %lld (%lld/%lld/%lld)\n",
(pb_ptr->hits[0] + pb_ptr->hits[1] + pb_ptr->hits[2]),
pb_ptr->hits[0], pb_ptr->hits[1], pb_ptr->hits[2]);
HDfprintf(stdout, "misses = %lld (%lld/%lld/%lld)\n",
(pb_ptr->misses[0] + pb_ptr->misses[1] + pb_ptr->misses[2]),
pb_ptr->misses[0], pb_ptr->misses[1], pb_ptr->misses[2]);
HDfprintf(stdout, "loads = %lld (%lld/%lld/%lld)\n",
(pb_ptr->loads[0] + pb_ptr->loads[1] + pb_ptr->loads[2]),
pb_ptr->loads[0], pb_ptr->loads[1], pb_ptr->loads[2]);
HDfprintf(stdout, "insertions = %lld (%lld/%lld/%lld)\n",
(pb_ptr->insertions[0] + pb_ptr->insertions[1] +
pb_ptr->insertions[2]),
pb_ptr->insertions[0], pb_ptr->insertions[1],
pb_ptr->insertions[2]);
HDfprintf(stdout, "flushes = %lld (%lld/%lld/%lld)\n",
(pb_ptr->flushes[0] + pb_ptr->flushes[1] + pb_ptr->flushes[2]),
pb_ptr->flushes[0], pb_ptr->flushes[1], pb_ptr->flushes[2]);
HDfprintf(stdout, "evictions = %lld (%lld/%lld/%lld)\n",
(pb_ptr->evictions[0] + pb_ptr->evictions[1] +
pb_ptr->evictions[2]),
pb_ptr->evictions[0], pb_ptr->evictions[1], pb_ptr->evictions[2]);
HDfprintf(stdout, "clears = %lld (%lld/%lld/%lld)\n",
(pb_ptr->clears[0] + pb_ptr->clears[1] + pb_ptr->clears[2]),
pb_ptr->clears[0], pb_ptr->clears[1], pb_ptr->clears[2]);
HDfprintf(stdout, "max LRU len / size = %lld / %lld\n",
pb_ptr->max_lru_len, pb_ptr->max_lru_size);
HDfprintf(stdout,
"LRU make space md/rd/tl skips = %lld/%lld/%lld\n",
pb_ptr->lru_md_skips, pb_ptr->lru_rd_skips,
pb_ptr->lru_tl_skips);
HDfprintf(stdout, "hash table insertions / deletions = %lld / %lld\n",
pb_ptr->total_ht_insertions, pb_ptr->total_ht_deletions);
if ( pb_ptr->successful_ht_searches > 0 ) {
ave_succ_search_depth =
(double)(pb_ptr->total_successful_ht_search_depth) /
(double)(pb_ptr->successful_ht_searches);
}
HDfprintf(stdout, "successful ht searches / ave depth = %lld / %llf\n",
pb_ptr->successful_ht_searches, ave_succ_search_depth);
if ( pb_ptr->failed_ht_searches > 0 ) {
ave_failed_search_depth =
(double)(pb_ptr->total_failed_ht_search_depth) /
(double)(pb_ptr->failed_ht_searches);
}
HDfprintf(stdout, "failed ht searches / ave depth = %lld / %llf\n",
pb_ptr->failed_ht_searches, ave_failed_search_depth);
HDfprintf(stdout, "max index length / size = %lld / %lld\n",
pb_ptr->max_index_len, pb_ptr->max_index_size);
HDfprintf(stdout, "max rd / md / mpmde entries = %lld / %lld / %lld\n",
pb_ptr->max_rd_pages, pb_ptr->max_md_pages,
pb_ptr->max_mpmde_count);
HDfprintf(stdout, "tick list max len / size = %lld / %lld\n",
pb_ptr->max_tl_len, pb_ptr->max_tl_size);
HDfprintf(stdout, "delayed write list max len / size = %lld / %lld\n",
pb_ptr->max_dwl_len, pb_ptr->max_dwl_size);
if ( pb_ptr->delayed_writes > 0 ) {
ave_delayed_write = (double)(pb_ptr->total_delay) /
(double)(pb_ptr->delayed_writes);
ave_delayed_write_ins_depth = (double)(pb_ptr->total_dwl_ins_depth) /
(double)(pb_ptr->delayed_writes);
}
HDfprintf(stdout,
"delayed writes / ave delay / ave ins depth = %lld / %llf / %llf\n",
pb_ptr->delayed_writes, ave_delayed_write, ave_delayed_write_ins_depth);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5PB_print_stats */
/*-------------------------------------------------------------------------
*
* Function: H5PB_add_new_page
*
* Purpose: Insert a new blank page to the page buffer if the page
* buffer is configured to allow pages of the specified
* type.
*
* This function is called by the MF layer when a new page
* is allocated to indicate to the page buffer layer that
* a read of the page from the file is not necessary since
* it's an empty page.
*
* For purposes of the VFD SWMR writer, we also track pages
* that are inserted via this call, as the fact that the
* page was allocated implies that an earlier version does
* not exist in the HDF5 file, and thus we need not concern
* ourselves with delaying the write of this pages to avoid
* messages from the future on the reader.
*
* Note that this function inserts the new page without
* attempting to make space. This can result in the page
* buffer exceeding its maximum size.
*
* Note also that it is possible that the page (marked clean)
* will be evicted before its first use.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_add_new_page(H5F_t *f, H5FD_mem_t type, haddr_t page_addr)
{
hbool_t can_insert = TRUE;
H5PB_t *pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
if ( H5FD_MEM_DRAW == type ) { /* raw data page insertion */
if ( pb_ptr->min_md_pages == pb_ptr->max_pages ) {
can_insert = FALSE;
}
} else { /* metadata page insertion */
if ( pb_ptr->min_rd_pages == pb_ptr->max_pages ) {
can_insert = FALSE;
}
}
if ( can_insert ) {
if ( H5PB__create_new_page(pb_ptr, page_addr,
(size_t)(pb_ptr->page_size),
type, TRUE, &entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"new page buffer page creation failed.")
/* make note that this page was allocated, not loaded from file */
entry_ptr->loaded = FALSE;
/* updates stats */
H5PB__UPDATE_STATS_FOR_INSERTION(pb_ptr, entry_ptr);
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_add_new_page */
/*-------------------------------------------------------------------------
*
* Function: H5PB_create
*
* Purpose: Setup a page buffer for the supplied file.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_create(H5F_t *f, size_t size, unsigned page_buf_min_meta_perc,
unsigned page_buf_min_raw_perc)
{
hbool_t vfd_swmr_writer = FALSE;
int i;
int32_t min_md_pages;
int32_t min_rd_pages;
H5PB_t *pb_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(page_buf_min_meta_perc <= 100);
HDassert(page_buf_min_raw_perc <= 100);
HDassert((page_buf_min_meta_perc + page_buf_min_raw_perc) <= 100);
/* Check args */
if ( f->shared->fs_strategy != H5F_FSPACE_STRATEGY_PAGE )
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, \
"Enabling Page Buffering requires PAGE file space strategy")
else if ( size > f->shared->fs_page_size ) {
/* round size down to the next multiple of fs_page_size */
hsize_t temp_size;
temp_size = (size / f->shared->fs_page_size) * f->shared->fs_page_size;
H5_CHECKED_ASSIGN(size, size_t, temp_size, hsize_t);
} /* end if */
else if ( 0 != size % f->shared->fs_page_size )
HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTINIT, FAIL, \
"Page Buffer size must be >= to the page size")
/* Calculate the minimum page count for metadata and raw data
* based on the fractions provided
*/
min_md_pages = (int32_t)((size * page_buf_min_meta_perc) /
(f->shared->fs_page_size * 100));
min_rd_pages = (int32_t)((size * page_buf_min_raw_perc) /
(f->shared->fs_page_size * 100));
HDassert(min_md_pages >= 0);
HDassert(min_rd_pages >= 0);
HDassert((min_md_pages + min_rd_pages) <=
(int32_t)(size / f->shared->fs_page_size));
/* compute vfd_swmr_writer */
if ( ( H5F_VFD_SWMR_CONFIG(f) ) && ( H5F_INTENT(f) & H5F_ACC_RDWR ) ) {
HDassert(f->shared->vfd_swmr_config.writer);
vfd_swmr_writer = TRUE;
}
/* Allocate the new page buffering structure */
if(NULL == (pb_ptr = H5FL_MALLOC(H5PB_t)))
HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, FAIL, "memory allocation failed")
/* initialize the new instance of H5PB_t */
pb_ptr->magic = H5PB__H5PB_T_MAGIC;
pb_ptr->page_size = f->shared->fs_page_size;
H5_CHECKED_ASSIGN(pb_ptr->page_size, size_t, \
f->shared->fs_page_size, hsize_t);
pb_ptr->max_pages = (int32_t)(size / f->shared->fs_page_size);
pb_ptr->curr_pages = 0;
pb_ptr->curr_md_pages = 0;
pb_ptr->curr_rd_pages = 0;
pb_ptr->min_md_pages = min_md_pages;
pb_ptr->min_rd_pages = min_rd_pages;
pb_ptr->max_size = size;
pb_ptr->min_meta_perc = page_buf_min_meta_perc;
pb_ptr->min_raw_perc = page_buf_min_raw_perc;
/* index */
for ( i = 0; i < H5PB__HASH_TABLE_LEN; i++ )
pb_ptr->ht[i] = NULL;
pb_ptr->index_len = 0;
pb_ptr->clean_index_len = 0;
pb_ptr->dirty_index_len = 0;
pb_ptr->index_size = 0;
pb_ptr->clean_index_size = 0;
pb_ptr->dirty_index_size = 0;
pb_ptr->il_len = 0;
pb_ptr->il_size = 0;
pb_ptr->il_head = NULL;
pb_ptr->il_tail = NULL;
/* LRU */
pb_ptr->LRU_len = 0;
pb_ptr->LRU_size = 0;
pb_ptr->LRU_head_ptr = NULL;
pb_ptr->LRU_tail_ptr = NULL;
/* VFD SWMR specific fields.
* The following fields are defined iff vfd_swmr_writer is TRUE.
*/
pb_ptr->vfd_swmr_writer = vfd_swmr_writer;
pb_ptr->mpmde_count = 0;
pb_ptr->cur_tick = 0;
/* delayed write list */
pb_ptr->max_delay = 0;
pb_ptr->dwl_len = 0;
pb_ptr->dwl_size = 0;
pb_ptr->dwl_head_ptr = NULL;
pb_ptr->dwl_tail_ptr = NULL;
/* tick list */
pb_ptr->tl_len = 0;
pb_ptr->tl_size = 0;
pb_ptr->tl_head_ptr = NULL;
pb_ptr->tl_tail_ptr = NULL;
H5PB_reset_stats(pb_ptr);
f->shared->pb_ptr = pb_ptr;
/* if this is a VFD SWMR reader, inform the reader VFD that the
* page buffer is configured. Note that this is for sanity
* checking, and only needed until we modify the file open
* code to create the page buffer before any file reads in
* the VFD SWMR reader case. After that, this code should be
* removed.
* JRM -- 1/29/19
*/
if ( ( H5F_VFD_SWMR_CONFIG(f) ) &&
( 0 == (H5F_INTENT(f) & H5F_ACC_RDWR) ) ) {
HDassert(f->shared->lf);
HDassert(! f->shared->vfd_swmr_config.writer);
H5FD_vfd_swmr_set_pb_configured(f->shared->lf);
}
done:
if ( ret_value < 0 ) {
if ( pb_ptr != NULL ) {
pb_ptr = H5FL_FREE(H5PB_t, pb_ptr);
}
}
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_create */
/*-------------------------------------------------------------------------
*
* Function: H5PB_dest
*
* Purpose: Flush (if necessary) and evict all entries in the page
* buffer, and then discard the page buffer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/22/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_dest(H5F_t *f)
{
int i;
H5PB_t *pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
H5PB_entry_t *evict_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity check */
HDassert(f);
HDassert(f->shared);
/* flush and destroy the page buffer, if it exists */
if ( f->shared->pb_ptr ) {
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
/* the current implementation if very inefficient, and will
* fail if there are any outstanding delayed writes -- must fix this
*/
for ( i = 0; i < H5PB__HASH_TABLE_LEN; i++ ) {
entry_ptr = pb_ptr->ht[i];
while ( entry_ptr ) {
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
evict_ptr = entry_ptr;
entry_ptr = entry_ptr->ht_next;
if ( evict_ptr->is_dirty ) {
if ( H5PB__flush_entry(f, pb_ptr, evict_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"Can't flush entry")
}
if ( H5PB__evict_entry(pb_ptr, evict_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"forced eviction failed")
entry_ptr = pb_ptr->ht[i];
}
}
/* regular operations fields */
HDassert(pb_ptr->curr_pages == 0);
HDassert(pb_ptr->curr_md_pages == 0);
HDassert(pb_ptr->curr_rd_pages == 0);
HDassert(pb_ptr->index_len == 0);
HDassert(pb_ptr->index_size == 0);
HDassert(pb_ptr->LRU_len == 0);
HDassert(pb_ptr->LRU_size == 0);
HDassert(pb_ptr->LRU_head_ptr == NULL);
HDassert(pb_ptr->LRU_tail_ptr == NULL);
/* VFD SWMR fields */
HDassert(pb_ptr->dwl_len == 0);
HDassert(pb_ptr->dwl_size == 0);
HDassert(pb_ptr->dwl_head_ptr == NULL);
HDassert(pb_ptr->dwl_tail_ptr == NULL);
HDassert(pb_ptr->tl_len == 0);
HDassert(pb_ptr->tl_size == 0);
HDassert(pb_ptr->tl_head_ptr == NULL);
HDassert(pb_ptr->tl_tail_ptr == NULL);
pb_ptr->magic = 0;
f->shared->pb_ptr = H5FL_FREE(H5PB_t, pb_ptr);
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_dest */
/*-------------------------------------------------------------------------
*
* Function: H5PB_flush
*
* Purpose: If the page buffer is defined, flush all entries.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/22/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_flush(H5F_t *f)
{
int i;
H5PB_t *pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
H5PB_entry_t *flush_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity check */
HDassert(f);
HDassert(f->shared);
pb_ptr = f->shared->pb_ptr;
if ( pb_ptr ) {
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
/* the current implementation is very inefficient, and will
* fail if there are any delayed writes -- must fix this
*/
for ( i = 0; i < H5PB__HASH_TABLE_LEN; i++ ) {
entry_ptr = pb_ptr->ht[i];
while ( entry_ptr ) {
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
flush_ptr = entry_ptr;
entry_ptr = entry_ptr->ht_next;
ldbgf("%s: visiting %zu-byte page %" PRIu64 "\n",
__func__, flush_ptr->size, flush_ptr->page);
if ( flush_ptr->is_dirty ) {
if (flush_ptr->delay_write_until != 0) {
ldbgf("%s: delaying %zu-byte page %" PRIu64
" until %" PRIu64 " (now %" PRIu64 ")\n",
__func__, flush_ptr->size, flush_ptr->page,
flush_ptr->delay_write_until,
f->shared->tick_num);
continue;
}
if ( H5PB__flush_entry(f, pb_ptr, flush_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"Can't flush entry")
}
}
}
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_flush */
/*-------------------------------------------------------------------------
*
* Function: H5PB_page_exists
*
* Purpose: Test to see if a page buffer page exists at the specified
* address. Set *page_exists_ptr to TRUE or FALSE accordingly.
*
* This function exists for the convenience of the test
* code
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/22/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_page_exists(H5F_t *f, haddr_t addr, hbool_t *page_exists_ptr)
{
uint64_t page;
H5PB_t *pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity check */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(page_exists_ptr);
/* Calculate the page offset */
page = (addr / pb_ptr->page_size);
/* the supplied address should be page aligned */
HDassert(addr == page * pb_ptr->page_size);
/* Search for page in the hash table */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
HDassert((NULL == entry_ptr) || (entry_ptr->addr == addr));
*page_exists_ptr = ( entry_ptr != NULL );
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_page_exists */
/*-------------------------------------------------------------------------
*
* Function: H5PB_read
*
* Purpose: Satisfy the read from the page buffer if possible.
*
* 1) If the page buffer is disabled, simply read from the
* HDF5 file and return.
*
* 2) If the read is for raw data, and the page buffer is
* configured for metadata only (i.e. min_md_pages ==
* max_pages), simply read from the HDF5 file and return.
*
* 3) If the read is for raw data, and it of page size or
* larger, read it directly from the HDF5 file.
*
* It is possible that the page buffer contains dirty pages
* that intersect with the read -- test for this and update
* the read buffer from the page buffer if any such pages
* exist.
*
* Note that no pages are inserted into the page buffer in
* this case.
*
* 4) If the read is for raw data, and it is of size less
* than the page size, satisfy the read from the page
* buffer, loading and inserting pages into the
* page buffer as necessary
*
* 5) If the read is for metadata, and the page buffer is
* configured for raw data only (i.e. min_rd_pages ==
* max_pages), simply read from the HDF5 file and return.
*
* The free space manager guarantees that allocations larger
* than one page will be page alligned, and that allocations
* of size less than or equal to page size will not cross page
* boundaries. Further, unlike raw data, metadata is always
* written and read atomically.
*
* In principle, this should make it easy to discriminate
* between small and multi-page metadata entries so that
* pages containing the former will be buffered and the
* latter be read directly from file.
*
* Unfortunately, the metadata cache does not always know the
* size of metadata entries when it tries to read them. In
* such cases, it issues speculative reads that may be either
* smaller or larger than the actual size of the piece of
* metadata that is finally read.
*
* Since we are guaranteed that all metadata allocations larger
* that one page are page aligned, we can safely clip at the
* page boundary any non page aligned metadata read that crosses
* page boundaries.
*
* However, page aligned reads could wind up being either
* small or multi-page. This results in two scenarios that
* we must handle:
*
* a) A page aligned read of size less than one page
* turns out to be mult-page.
*
* In this case, the initial speculative read will
* result in a page load and insertion into the page
* buffer. This page must be evicted on the subsequent
* read of size greater than page size.
*
* In the context of VFD SWMR, it is also possible that
* that the multi-page metadata entry is already in the
* page buffer -- in which case the initial read should
* be satisfied from the multi-page page buffer entry.
*
* b) A page aligned, larger than one page read turns out
* to be small (less than one page).
*
* If there is already a page in the page buffer with
* same address, we can safely clip the original
* read to page size
*
* The above considerations resolve into the following cases:
*
* 6) If the read is for metadata and not page aligned, clip
* the read to the end of the current page if necessary.
* Load the relevant page if necessary and satisfy the
* read from the page buffer. Note that it there is an
* existing page, it must not be a multi-page metadata
* entry. It it is, flag an error.
*
* 7) If the read is for metadata, is page aligned, is larger
* than one page, and there is no entry in the page buffer,
* satisfy the read from the file
*
* 8) If the read is for metadata, is page aligned, is larger
* than one page, and there is a regular entry at the target
* page address, test to see if the last read was for the
* same address.
*
* If was, evict the page, and satisfy the read from file.
* Flag an error if the page was dirty.
*
* If the last read was for a different page, clip the read
* to one page, and satisfy the read from the existing
* regular entry.
*
* 9) If the read is for metadata, is page aligned, is larger
* than one page, and there is a multi-page metadata entry
* at the target page address, test to see if
* pb_ptr->vfd_swmr_write is TRUE.
*
* If it is, satisfy the read from the multi-page metadata
* entry, clipping the read if necessary.
*
* if pb_ptr->vfd_swmr_write is FALSE, flag an error.
*
* 10) If the read is for metadata, is page aligned, is no
* larger than a page, test to see if the page buffer
* contains a page at the target address.
*
* If it doesn't, load the page and satisfy the read
* from it.
*
* If it contains a regular page entry, satisfy the read
* from it.
*
* If it contains a multipage metadata entry at the target
* address, satisfy the read from the multi-page metadata
* entry if pb_ptr->vfd_swmr_write is TRUE, and flag an
* error otherwise.
*
* Observe that this function handles casses 1, 2, and 5
* directly, calls H5PB_read_raw() for cases 3 & 4, and
* calls H5PB_read_meta() for cases 6), 7, 8, 9), and 10).
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
/* TBD Add optional raw-data bypass here and at H5PB_write when we
* are operating in parallel mode.
*/
herr_t
H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
void *buf/*out*/)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
hbool_t bypass_pb = FALSE; /* Whether to bypass page buffering */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(type != H5FD_MEM_GHEAP);
pb_ptr = f->shared->pb_ptr;
if ( pb_ptr == NULL ) {
bypass_pb = TRUE; /* case 1) -- page buffer is disabled */
} else {
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
if ( H5FD_MEM_DRAW == type ) { /* raw data read */
if ( pb_ptr->min_md_pages == pb_ptr->max_pages ) {
/* case 2) -- page buffer configured for metadata only */
bypass_pb = TRUE;
}
} else { /* metadata read */
if ( pb_ptr->min_rd_pages == pb_ptr->max_pages ) {
/* case 5) -- page buffer configured for raw data only */
bypass_pb = TRUE;
}
}
}
#ifdef H5_HAVE_PARALLEL
/* at present, the page buffer must be disabled in the parallel case.
* However, just in case ...
*/
if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
bypass_pb = TRUE;
} /* end if */
#endif /* H5_HAVE_PARALLEL */
if ( bypass_pb ) { /* cases 1, 2. and 5 */
if ( H5FD_read(f->shared->lf, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"read through metadata accumulator failed")
/* Update statistics */
if ( pb_ptr ) {
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
}
} else {
if ( H5FD_MEM_DRAW == type ) { /* cases 3 and 4 */
if ( H5PB__read_raw(f, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"H5PB_read_raw() failed")
} else { /* cases 6, 7, 8, 9, and 10 */
if ( H5PB__read_meta(f, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"H5PB_read_meta() failed")
}
H5PB__UPDATE_STATS_FOR_ACCESS(pb_ptr, type, size);
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB_read() */
/*-------------------------------------------------------------------------
*
* Function: H5PB_remove_entry
*
* Purpose: Remove possible metadata entry with ADDR from the PB cache.
*
* This is in response to the data corruption bug from fheap.c
* with page buffering + page strategy.
*
* Note: Large metadata page bypasses the PB cache.
*
* Note: Update of raw data page (large or small sized) is
* handled by the PB cache.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi; Feb 2017
*
* Changes: Reworked function for re-implementation of the page buffer.
*
* In the context of VFD SWMR, it is possible that the
* discarded page or multi-page metadata entry has been
* modified during the current tick and/or is subject to a
* delayed write. We must detect this, and remove the entry
* from the tick list and/or delayed write list before it is
* evicted.
*
* Vailin: I think we need to do this for raw data as well.
*
* JRM -- 10/23/18
*
* We also need to evict modified pages from the page
* buffer in the VFD SWMR reader case to avoid message from
* the past bugs. This function will serve for this for
* now, but for efficiency, we may want a version that takes
* a list of pages instead.
*
* JRM -- 12/30/18
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_remove_entry(const H5F_t *f, haddr_t addr)
{
uint64_t page;
H5PB_t *pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
/* Calculate the page offset */
page = (addr / pb_ptr->page_size);
HDassert(addr == page * pb_ptr->page_size);
/* Search for page in the hash table */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
if ( entry_ptr ) {
HDassert(entry_ptr->addr == addr);
/* A page or a metadata multi-page with vfd_swmr_writer (case 7) */
HDassert( (entry_ptr->size == pb_ptr->page_size) ||
(entry_ptr->size > pb_ptr->page_size &&
entry_ptr->mem_type != H5FD_MEM_DRAW &&
pb_ptr->vfd_swmr_writer) );
if ( entry_ptr->modified_this_tick ) {
H5PB__REMOVE_FROM_TL(pb_ptr, entry_ptr, FAIL);
entry_ptr->modified_this_tick = FALSE;
}
if ( entry_ptr->delay_write_until > 0 ) {
entry_ptr->delay_write_until = 0;
H5PB__REMOVE_FROM_DWL(pb_ptr, entry_ptr, FAIL)
if ( ! ( entry_ptr->is_mpmde ) ) {
H5PB__UPDATE_RP_FOR_INSERTION(pb_ptr, entry_ptr, FAIL);
}
}
/* if the entry is dirty, mark it clean before we evict */
if ( ( entry_ptr->is_dirty ) &&
( H5PB__mark_entry_clean(pb_ptr, entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry clean failed")
if ( H5PB__evict_entry(pb_ptr, entry_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, "forced eviction failed")
/* Do we need to remove the entry from the metadata file index in
* the VFD SWMR case?
*
* Probably yes -- suppose a page is deallocated, and a multipage
* metadata entry is allocated at the same base address. This would
* change the metadata file entry size.
*
* However, this is sufficiently improbably that it doesn't cause
* problems (that I know of) at present.
*
* Unless it does, hold off on this until we add code to allow entries
* to age out of the metadata file index, as that will give us the
* necessary infrastructure.
*
* JRM -- 12/6/18
*/
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_remove_entry */
/*-------------------------------------------------------------------------
*
* Function: H5PB_update_entry
*
* Purpose: In PHDF5, metadata cache entries that are written by other
* processes are simply marked clean in the current process.
* However, if the page buffer is enabled, entries marked
* clean must still be written to the page buffer so as to
* keep the contents of metadata pages consistent on all
* processes.
*
* Do this as follows:
*
* 1) Test to see if the page buffer is configured to accept
* metadata pages. If it isn't, return.
*
* 2) Test to see if the page buffer contains the page that
* contains the supplied metadata cache entry. If it
* doesn't, return.
*
* 3) Write the supplied buffer to page at the appropriate
* offset.
*
* Note that at present, page buffering is disabled in the
* parallel case. Thus this function has not been tested.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/23/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_update_entry(H5PB_t *pb_ptr, haddr_t addr, size_t size, const void *buf)
{
uint64_t page;
size_t offset;
H5PB_entry_t *entry_ptr = NULL;
haddr_t page_addr;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(size > 0);
HDassert(size <= pb_ptr->page_size);
HDassert(buf);
if ( pb_ptr->min_rd_pages < pb_ptr->max_pages ) {
/* page buffer is configured to accept metadata pages */
/* Calculate the aligned address of the containing page */
page = (addr / pb_ptr->page_size);
page_addr = page * pb_ptr->page_size;
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
if ( entry_ptr ) {
HDassert( entry_ptr->is_metadata );
HDassert( ! (entry_ptr->is_mpmde) );
HDassert(addr + size <= page_addr + pb_ptr->page_size);
offset = addr - page_addr;
HDmemcpy(((uint8_t *)(entry_ptr->image_ptr) + offset),
buf, size);
/* should we mark the page dirty? If so, replace the following
* with a call to H5PB__mark_entry_dirty()
*/
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_update_entry */
/*-------------------------------------------------------------------------
*
* Function: H5PB_vfd_swmr__release_delayed_writes
*
* Purpose: After the tick list has been released, and before the
* beginning of the next tick, we must scan the delayed
* write list, and release those entries whose delays have
* expired.
*
* Note that pages of metadata, and multi-page metadata entries
* are handled differently.
*
* Regular pages are removed from the delayed write list and
* inserted in the replacement policy
*
* In contrast, multi-page metadata entries are simply
* flushed and evicted.
*
* Since the delayed write list is sorted in decreasing
* delay_write_until order, we start our scan at the bottom
* of the delayed write list and continue upwards until no
* expired entries remain.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 11/15/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_vfd_swmr__release_delayed_writes(H5F_t * f)
{
H5PB_t * pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->vfd_swmr);
HDassert(f->shared->vfd_swmr_writer);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->vfd_swmr_writer);
while (pb_ptr->dwl_tail_ptr &&
pb_ptr->dwl_tail_ptr->delay_write_until <= f->shared->tick_num) {
entry_ptr = pb_ptr->dwl_tail_ptr;
HDassert(entry_ptr->is_dirty);
entry_ptr->delay_write_until = 0;
H5PB__REMOVE_FROM_DWL(pb_ptr, entry_ptr, FAIL)
if ( entry_ptr->is_mpmde ) { /* flush and evict now */
if ( H5PB__flush_entry(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"flush of mpmde failed")
if ( H5PB__evict_entry(pb_ptr, entry_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"eviction of mpmde failed")
} else { /* insert it in the replacement policy */
H5PB__UPDATE_RP_FOR_INSERT_APPEND(pb_ptr, entry_ptr, FAIL)
}
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_vfd_swmr__release_delayed_writes() */
/*-------------------------------------------------------------------------
*
* Function: H5PB_vfd_swmr__release_tick_list
*
* Purpose: After the metadata file has been updated, and before the
* beginning of the next tick, we must release the tick list.
*
* This function performs this function.
*
* In passing, flush and evict any multi-page metadata entries
* that are not subject to a delayed write.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 11/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_vfd_swmr__release_tick_list(H5F_t * f)
{
H5PB_t * pb_ptr = NULL;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->vfd_swmr);
HDassert(f->shared->vfd_swmr_writer);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->vfd_swmr_writer);
/* remove all entries from the tick list */
while ( pb_ptr->tl_head_ptr ) {
entry_ptr = pb_ptr->tl_head_ptr;
H5PB__REMOVE_FROM_TL(pb_ptr, entry_ptr, FAIL)
entry_ptr->modified_this_tick = FALSE;
if ( entry_ptr->is_mpmde ) {
HDassert(entry_ptr->is_dirty);
if ( entry_ptr->delay_write_until == 0 ) {
/* flush and evict the multi-page metadata entry immediately */
if ( H5PB__flush_entry(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"flush of mpmde failed")
if ( H5PB__evict_entry(pb_ptr, entry_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"eviction of mpmde failed")
}
}
/* if the entry is not a multi-page metadata entry, it must already
* be on either the replacment policy or the delayed write list.
* In either case, it will be flush when possible and necessary.
*/
}
HDassert(pb_ptr->tl_head_ptr == NULL);
HDassert(pb_ptr->tl_tail_ptr == NULL);
HDassert(pb_ptr->tl_len == 0);
HDassert(pb_ptr->tl_size == 0);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_vfd_swmr__release_tick_list */
/*-------------------------------------------------------------------------
*
* Function: H5PB_vfd_swmr__set_tick
*
* Purpose: At the beginning of each tick, the page buffer must be told
* to synchronize its copy of the current tick with that of
* the file to which the page buffer belongs.
*
* This function performs this function.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 11/20/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_vfd_swmr__set_tick(H5F_t * f)
{
H5PB_t * pb_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->vfd_swmr);
HDassert(f->shared->vfd_swmr_writer);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->vfd_swmr_writer);
/* the tick must always increase by 1 -- verify this */
if ( f->shared->tick_num != pb_ptr->cur_tick + 1 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"f->shared->tick_num != pb_ptr->cur_tick + 1 ?!?!")
pb_ptr->cur_tick = f->shared->tick_num;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_vfd_swmr__release_tick_list */
/*-------------------------------------------------------------------------
*
* Function: H5PB_vfd_swmr__update_index
*
* Purpose: In the VFD SWMR writer, all metadata writes to the page
* buffer during a tick are buffered in the page buffer in
* the tick list. Further, the metadata cache is flushed
* to the page buffer at the end of the tick so that all
* metadata changes during the tick are reflected in the
* tick list.
*
* Once this is done, the internal representation of the
* metadata file index must be updated from the tick list
* so that the metadata file can be updated, and the tick
* list can be emptied and prepared to buffer metadata changes
* in the next tick.
*
* This function is called to accomplish this. Its cycle of
* operation is as follows:
*
* 1) Scan the tick list. For each entry (*pbe_ptr), test
* to see if it appears in the index.
*
* If it does the entry must have been modified in the
* past tick. Update the index entry (*ie_ptr) as follows:
*
* a) Set ie_ptr->entry_ptr = pbe_ptr->image_ptr. This
* is needed to give the metadata file update code
* access to the image of the target page or multi-page
* multi-date entry. Note that ie_ptr->entry_ptr will
* be set to NULL as soon as the metadata file is updated,
* so the buffer pointed to by pbe_ptr->image_ptr can
* be safely discarded at any time after the metadata
* file update.
*
* b) Set ie_ptr->tick_of_last_change to the current tick.
*
* c) If pbe_ptr->is_dirty, set ie_ptr->clean to FALSE.
* If pbe_ptr->is_dirty is FALSE, set ie_ptr->clean
* to TRUE and set ie_ptr->tick_of_last_flush to the
* current tick.
*
* If the tick list entry (*pbe_ptr) doesn't appear in
* the index, allocate a metadata file index entry (*ie_ptr),
* and initialize it as follows:
*
* ie_ptr->hdf5_page_offset = pbe_ptr->page
* ie_ptr->length = pbe_ptr->size
* ie_ptr->delayed_flush = pbe_ptr->delay_write_until
*
* and then update the new entry as per the existing entry
* case described above.
*
* 2) Scan the internal representation of the metadata file
* index for entries that do not appear in the tick list.
* For each such entry (*ie_ptr), proceed as follows:
*
* 1) If ie_ptr->clean, we are done -- proceed to the
* next index entry that doesn't appear in the tick list.
*
* 2) Test to see if the cognate entry appears in the page
* buffer. If it doesn't, it must have been flushed and
* evicted in the past tick. Set
*
* ie_ptr->clean = TRUE, and
*
* ie_ptr->tick_of_last_flush = current tick
*
* and proceed to the next index entry that doesn't
* appear in the tick list.
*
* 3) If the cognate entry does appear in the page buffer
* and is clean, proceed as per 2) above.
*
* 4) In all other cases, do nothing, and proceed to the
* next index entry that does not appear in the tick list.
*
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 11/9/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_vfd_swmr__update_index(H5F_t * f,
uint32_t * idx_ent_added_ptr,
uint32_t * idx_ent_modified_ptr,
uint32_t * idx_ent_not_in_tl_ptr,
uint32_t * idx_ent_not_in_tl_flushed_ptr)
{
uint32_t i;
uint32_t idx_ent_added = 0;
uint32_t idx_ent_modified = 0;
uint32_t idx_ent_not_in_tl = 0;
uint32_t idx_ent_not_in_tl_flushed = 0;
H5PB_t * pb_ptr = NULL;
H5PB_entry_t *pbe_ptr = NULL;
H5FD_vfd_swmr_idx_entry_t * ie_ptr = NULL;
H5FD_vfd_swmr_idx_entry_t * idx = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->vfd_swmr);
HDassert(f->shared->vfd_swmr_writer);
idx = f->shared->mdf_idx;
HDassert(idx);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->vfd_swmr_writer);
HDassert(idx_ent_added_ptr);
HDassert(idx_ent_modified_ptr);
HDassert(idx_ent_not_in_tl_ptr);
HDassert(idx_ent_not_in_tl_flushed_ptr);
/* scan the tick list and insert or update metadata file index entries
* as appropriate.
*/
pbe_ptr = pb_ptr->tl_head_ptr;
while ( pbe_ptr ) {
uint64_t target_page;
int32_t top;
int32_t bottom;
int32_t probe;
HDassert(pbe_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
/* do a binary search on the metadata file index to see if
* it already contains an entry for *pbe_ptr.
*/
ie_ptr = NULL;
top = f->shared->mdf_idx_entries_used - 1;
bottom = 0;
target_page = pbe_ptr->page;
while ( top >= bottom ) {
probe = (top + bottom) / 2;
if ( idx[probe].hdf5_page_offset < target_page ) {
bottom = probe + 1;
} else if ( idx[probe].hdf5_page_offset > target_page ) {
top = probe - 1;
} else { /* found it */
ie_ptr = idx + probe;
bottom = top + 1; /* to exit loop */
}
}
if ( ie_ptr == NULL ) { /* alloc new entry in the metadata file index*/
/* for now the metadata file index is of fixed size -- if we
* exceed the maximum size, just abort.
*
* Obviously, this must be fixed for the production version.
*/
uint32_t new_index_entry_index;
new_index_entry_index = f->shared->mdf_idx_entries_used +
idx_ent_added++;
if ( new_index_entry_index >= f->shared->mdf_idx_len ) {
HDfprintf(stderr, "\n\nmax mdf index len (%d)exceeded.\n\n",
f->shared->mdf_idx_len);
HDfprintf(stderr, "tick = %lld.\n", f->shared->tick_num);
exit(1);
}
ie_ptr = idx + new_index_entry_index;
/* partial initialization of new entry -- rest done later */
ie_ptr->hdf5_page_offset = target_page;
ie_ptr->md_file_page_offset = 0; /* undefined at this point */
ie_ptr->length = (uint32_t)(pbe_ptr->size);
ie_ptr->chksum = 0; /* undefined at this point */
/* ie_ptr->entry_ptr initialized below */
/* ie_ptr->tick_of_last_change initialized below */
/* ie_ptr->clean initialized below */
/* ie_ptr->tick_of_last_flush initialized below */
ie_ptr->delayed_flush = pbe_ptr->delay_write_until;
ie_ptr->moved_to_hdf5_file = FALSE;
} else {
idx_ent_modified++;
}
ie_ptr->entry_ptr = pbe_ptr->image_ptr;
ie_ptr->tick_of_last_change = f->shared->tick_num;
ie_ptr->clean = !(pbe_ptr->is_dirty);
if ( ie_ptr->clean ) {
ie_ptr->tick_of_last_flush = f->shared->tick_num;
} else {
ie_ptr->tick_of_last_flush = 0;
}
HDassert(ie_ptr);
pbe_ptr = pbe_ptr->tl_next;
}
/* scan the metadata file index for entries that don't appear in the
* tick list. If the index entry is dirty, and either doesn't appear
* in the page buffer, or is clean in the page buffer, mark the index
* entry clean and as having been flushed in the current tick.
*/
for ( i = 0; i < f->shared->mdf_idx_entries_used; i++ ) {
HDassert( ( i == 0 ) ||
( idx[i - 1].hdf5_page_offset < idx[i].hdf5_page_offset ) );
if ( idx[i].tick_of_last_change < f->shared->tick_num ) {
idx_ent_not_in_tl++;
ie_ptr = idx + i;
if ( ! ( ie_ptr->clean ) ) {
H5PB__SEARCH_INDEX(pb_ptr, ie_ptr->hdf5_page_offset, \
pbe_ptr, FAIL);
if ( ( ! pbe_ptr ) || ( ! ( pbe_ptr->is_dirty ) ) ) {
idx_ent_not_in_tl_flushed++;
ie_ptr->clean = TRUE;
ie_ptr->tick_of_last_flush = f->shared->tick_num;
}
}
}
}
HDassert(idx_ent_modified + idx_ent_not_in_tl ==
f->shared->mdf_idx_entries_used);
HDassert(idx_ent_modified + idx_ent_not_in_tl + idx_ent_added <=
f->shared->mdf_idx_len);
*idx_ent_added_ptr = idx_ent_added;
*idx_ent_modified_ptr = idx_ent_modified;
*idx_ent_not_in_tl_ptr = idx_ent_not_in_tl;
*idx_ent_not_in_tl_flushed_ptr = idx_ent_not_in_tl_flushed;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_vfd_swmr__update_index */
/*-------------------------------------------------------------------------
*
* Function: H5PB_write
*
* Purpose: Write data into the Page Buffer if practical, and to file
* otherwise. Specifically:
*
* 1) If the page buffer is disabled, simply write to the
* HDF5 file and return.
*
* 2) If the write is raw data, and the page buffer is
* configured for metadata only (i.e. min_md_pages ==
* max_pages), simply write to the HDF5 file and return.
*
* 3) If the write is raw data, and it of page size or
* larger, write directly from the HDF5 file.
*
* It is possible that the write intersects one or more
* pages in the page buffer -- test for this and update
* any partially written pages, and evict any pages
* that are completely overwritten.
*
* Note that no pages are inserted into the page buffer in
* this case.
*
* 4) If the write is of raw data, and it is of size less
* than the page size, write the page into the page
* buffer, loading and inserting pages into the
* page buffer as necessary
*
* 5) If the write is of metadata, and the page buffer is
* configured for raw data only (i.e. min_rd_pages ==
* max_pages), simply write to the HDF5 file and return.
*
* 6) If the write is of metadata, the write is larger than
* one page, and vfd_swmr_writer is FALSE, simply read
* from the HDF5 file. There is no need to check the
* page buffer, as metadata is always read atomically,
* and entries of this size are not buffered in the page
* buffer.
*
* 7) If the write is of metadata, the write is larger than
* one page, and vfd_swmr_writer is TRUE, the write must
* buffered in the page buffer until the end of the tick.
*
* If it doesn't exist already, create a multi-page metadata
* entry in the page buffer and copy the write into it.
* Insert the new entry in the tick list if necessary.
*
* Test to see if the write of the multi-page metadata
* entry must be delayed. If so, place the entry in
* the delayed write list. Otherwise, the multi-page
* metadata entry will be written to the HDF5 file and
* evicted when the tick list is released at the of the
* tick.
*
*
* 8) If the write is of metadata, and the write is of size
* less than or equal to the page size, write the data
* into the page buffer, loading and inserting a page
* if necessary.
*
* If, in addition, vfd_swmr_writer is TRUE, add the page
* touched by the write to the tick list.
*
* Observe that this function handles casses 1, 2, 5, and 6
* directly, calls H5PB_write_raw() for cases 3 & 4, and
* calls H5PB_read_meta() for cases 7, and 8.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
const void *buf)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
hbool_t bypass_pb = FALSE; /* Whether to bypass page buffering */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(type != H5FD_MEM_GHEAP);
pb_ptr = f->shared->pb_ptr;
if ( pb_ptr == NULL ) {
bypass_pb = TRUE; /* case 1) -- page buffer is disabled */
} else {
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
if ( H5FD_MEM_DRAW == type ) { /* raw data write */
if ( pb_ptr->min_md_pages == pb_ptr->max_pages ) {
/* case 2) -- page buffer configured for metadata only */
bypass_pb = TRUE;
}
} else { /* metadata write */
if ( pb_ptr->min_rd_pages == pb_ptr->max_pages ) {
/* case 5) -- page buffer configured for raw data only */
bypass_pb = TRUE;
} else if ( ( size >= pb_ptr->page_size ) &&
( ! ( pb_ptr->vfd_swmr_writer ) ) ) {
/* case 6) -- md read larger than one page and
* pb_ptr->vfd_swmr_writer is FALSE.
*/
bypass_pb = TRUE;
}
}
}
#ifdef H5_HAVE_PARALLEL
/* at present, the page buffer must be disabled in the parallel case.
* However, just in case ...
*/
if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
bypass_pb = TRUE;
} /* end if */
#endif /* H5_HAVE_PARALLEL */
if ( bypass_pb ) { /* cases 1, 2. 5, and 6 */
if ( H5FD_write(f->shared->lf, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"write through metadata accumulator failed")
/* Update statistics */
if ( pb_ptr ) {
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
}
} else {
if ( H5FD_MEM_DRAW == type ) { /* cases 3 and 4 */
if ( H5PB__write_raw(f, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"H5PB_read_raw() failed")
} else { /* cases 7, and 8 */
if ( H5PB__write_meta(f, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"H5PB_read_meta() failed")
}
H5PB__UPDATE_STATS_FOR_ACCESS(pb_ptr, type, size);
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB_write() */
/**************************************************************************/
/***************************** STATIC FUNCTIONS ***************************/
/**************************************************************************/
/*-------------------------------------------------------------------------
*
* Function: H5PB__allocate_page
*
* Purpose: Allocate an instance of H5PB_entry_t and its associated
* buffer. The supplied size must be greater than or
* equal to pb_ptr->page_size, and equal to that value if
* pb_ptr->vfd_swmr_writer is FALSE.
*
* The associated buffer is zeroed if clean_image is TRUE.
*
* Return: Pointer to the newly allocated instance of H5PB_entry_t
* on success, and NULL on failure.
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static H5PB_entry_t *
H5PB__allocate_page(H5PB_t *pb_ptr, size_t size, hbool_t clean_image)
{
H5PB_entry_t *entry_ptr = NULL;
void * image_ptr = NULL;
H5PB_entry_t *ret_value = NULL; /* Return value */
FUNC_ENTER_NOAPI(NULL)
/* sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(size >= pb_ptr->page_size);
HDassert((size == pb_ptr->page_size) || (pb_ptr->vfd_swmr_writer));
/* allocate the entry and its associated image buffer */
if ( NULL == (entry_ptr = H5FL_MALLOC(H5PB_entry_t)))
HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, NULL, \
"memory allocation for H5PB_entry_t failed")
if ( clean_image ) {
image_ptr = H5MM_calloc(size);
} else {
image_ptr = H5MM_malloc(size);
}
if ( NULL == image_ptr )
HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, NULL, \
"memory allocation for page image failed")
/* initialize the new page buffer entry */
entry_ptr->magic = H5PB__H5PB_ENTRY_T_MAGIC;
entry_ptr->pb_ptr = pb_ptr;
entry_ptr->addr = HADDR_UNDEF;
entry_ptr->page = 0;
entry_ptr->size = size;
entry_ptr->image_ptr = image_ptr;
entry_ptr->mem_type = H5FD_MEM_DEFAULT;
entry_ptr->is_metadata = FALSE;
entry_ptr->is_mpmde = FALSE;
entry_ptr->is_dirty = FALSE;
/* fields supporting the hash table */
entry_ptr->ht_prev = NULL;
entry_ptr->ht_next = NULL;
entry_ptr->il_prev = NULL;
entry_ptr->il_next = NULL;
/* fields supporting replacement policise */
entry_ptr->next = NULL;
entry_ptr->prev = NULL;
/* fields supporting VFD SWMR */
entry_ptr->is_mpmde = FALSE;
entry_ptr->loaded = FALSE;
entry_ptr->modified_this_tick = FALSE;
entry_ptr->delay_write_until = 0;
entry_ptr->tl_next = NULL;
entry_ptr->tl_prev = NULL;
ret_value = entry_ptr;
done:
if ( NULL == ret_value ) {
if ( entry_ptr ) {
entry_ptr->magic = 0;
entry_ptr = H5FL_FREE(H5PB_entry_t, entry_ptr);
}
if ( image_ptr ) {
image_ptr = H5MM_xfree(image_ptr);
}
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__allocate_page() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__create_new_page
*
* Purpose: Create a new page and insert it in the page buffer with
* the specified address and type. If entry_ptr_ptr is not
* NULL, return a pointer to the new entry in *entry_ptr_ptr.
*
* Throw an error if a page already exists at the specified
* address.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
herr_t
H5PB__create_new_page(H5PB_t *pb_ptr, haddr_t addr, size_t size,
H5FD_mem_t type, hbool_t clean_image, H5PB_entry_t **entry_ptr_ptr)
{
hbool_t inserted_in_index = FALSE;
hbool_t inserted_in_lru = FALSE;
uint64_t page;
H5PB_entry_t *entry_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
page = (uint64_t)addr / (uint64_t)(pb_ptr->page_size);
HDassert((uint64_t)(addr) == (page * (uint64_t)(pb_ptr->page_size)));
HDassert(size >= pb_ptr->page_size);
HDassert((size == pb_ptr->page_size) ||
((pb_ptr->vfd_swmr_writer) && (type != H5FD_MEM_DRAW)));
HDassert((NULL == entry_ptr_ptr) || (NULL == *entry_ptr_ptr));
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL);
if ( entry_ptr != NULL ) {
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"page buffer already contains a page at the specified address")
}
entry_ptr = H5PB__allocate_page(pb_ptr, size, clean_image);
if ( NULL == entry_ptr )
HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, FAIL, \
"Can't allocate new page buffer entry")
/* perform additional initialization */
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->pb_ptr == pb_ptr);
entry_ptr->addr = addr;
entry_ptr->page = page;
HDassert(entry_ptr->size == size);
HDassert(entry_ptr->image_ptr);
entry_ptr->mem_type = type;
entry_ptr->is_metadata = (type != H5FD_MEM_DRAW);
entry_ptr->is_mpmde = ((entry_ptr->is_metadata) &&
(size > pb_ptr->page_size));
entry_ptr->is_dirty = FALSE;
/* insert in the hash table */
H5PB__INSERT_IN_INDEX(pb_ptr, entry_ptr, FAIL)
inserted_in_index = TRUE;
/* insert at the head of the LRU if it isn't a multi-page metadata entry */
if ( ! entry_ptr->is_mpmde ) {
H5PB__UPDATE_RP_FOR_INSERTION(pb_ptr, entry_ptr, FAIL)
inserted_in_lru = TRUE;
}
/* updates stats */
H5PB__UPDATE_STATS_FOR_INSERTION(pb_ptr, entry_ptr);
if ( entry_ptr_ptr ) {
*entry_ptr_ptr = entry_ptr;
}
done:
if ( ret_value < 0 ) {
if ( entry_ptr ) {
if ( inserted_in_lru ) {
H5PB__UPDATE_RP_FOR_EVICTION(pb_ptr, entry_ptr, FAIL);
}
if ( inserted_in_index ) {
H5PB__DELETE_FROM_INDEX(pb_ptr, entry_ptr, FAIL)
}
H5PB__deallocate_page(entry_ptr);
entry_ptr = NULL;
}
}
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB_add_new_page */
/*-------------------------------------------------------------------------
*
* Function: H5PB__deallocate_page
*
* Purpose: Free the supplied instance of H5PB_entry_t and its
* associated buffer. The entry must be clean and removed
* from the page buffer before this function is called.
*
* Return: void
*
* Programmer: John Mainzer -- 10/12/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static void
H5PB__deallocate_page(H5PB_entry_t *entry_ptr)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* sanity checks */
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->size > 0);
HDassert(entry_ptr->image_ptr);
HDassert(!(entry_ptr->is_dirty));
HDassert(entry_ptr->ht_next == NULL);
HDassert(entry_ptr->ht_prev == NULL);
HDassert(entry_ptr->il_next == NULL);
HDassert(entry_ptr->il_prev == NULL);
HDassert(entry_ptr->next == NULL);
HDassert(entry_ptr->prev == NULL);
HDassert(entry_ptr->tl_next == NULL);
HDassert(entry_ptr->tl_prev == NULL);
entry_ptr->magic = 0;
entry_ptr->image_ptr = H5MM_xfree(entry_ptr->image_ptr);
entry_ptr = H5FL_FREE(H5PB_entry_t, entry_ptr);
FUNC_LEAVE_NOAPI_VOID
} /* H5PB__deallocate_page() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__evict_entry
*
* Purpose: Evict the target entry from the from the page buffer, and
* de-allocate its associated image and instance of
* H5PB_entry_t.
*
* In general, entries must be clean before they can be
* evicted, and the minimum metadata and raw data limits
* must be respected. Attempts to evict an entry that
* that do not respect these constraints will generate
* and error unless the force parameter is TRUE, in which
* case, these constraints are igmored.
*
* In the context of VFD SWMR, there is also the requirement
* that entries to be evicted not be on the tick list, and
* also not reside on the delayed write list. In the rare
* case in which such a page is discarded by the free space
* manager, it must be removed from the tick list and/or the
* delayed write list before being evicted by this function.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/14/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__evict_entry(H5PB_t *pb_ptr, H5PB_entry_t *entry_ptr, hbool_t force)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->size > 0);
HDassert(entry_ptr->image_ptr);
/* entries on either the tick list or the delayed write
* list may not be evicted -- verify this.
*/
HDassert(!(entry_ptr->modified_this_tick));
HDassert(entry_ptr->delay_write_until == 0);
if ( ( ! force ) && ( entry_ptr->is_dirty ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"Attempt to evict a dirty entry");
if ( ! force ) {
/* it is OK to evict an metadata page if pb_ptr->curr_md_pages ==
* pb_ptr->min_md_pages - 1 if we are about to replace it with another
* metadata page.
*
* Similarly, it is OK to evict an raw data page if
* pb_ptr->curr_rd_pages == pb_ptr->min_rd_pages - 1 if we are
* about to replace it with another raw data page.
*
* Assume sanity checks have been made before this call, and
* allow the above without testing the intended replacement.
*/
if ( ( entry_ptr->is_metadata ) &&
( pb_ptr->curr_md_pages < pb_ptr->min_md_pages ) ) {
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"Attempt to violate min_md_pages");
} else if ( ( ! entry_ptr->is_metadata ) &&
( pb_ptr->curr_rd_pages < pb_ptr->min_rd_pages ) ) {
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"Attempt to violate min_rd_pages");
}
} else if ( ( entry_ptr->is_dirty ) &&
( H5PB__mark_entry_clean(pb_ptr, entry_ptr) < 0 ) ) {
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, "mark entry clean failed")
}
/* if the entry is in the replacement policy, remove it */
if ( ! (entry_ptr->is_mpmde) ) {
H5PB__UPDATE_RP_FOR_EVICTION(pb_ptr, entry_ptr, FAIL)
}
/* remove the entry from the hash table */
H5PB__DELETE_FROM_INDEX(pb_ptr, entry_ptr, FAIL)
/* update stats for eviction */
H5PB__UPDATE_STATS_FOR_EVICTION(pb_ptr, entry_ptr)
/* deallocate the page */
H5PB__deallocate_page(entry_ptr);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__evict_entry() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__flush_entry
*
* Purpose: Flush the target entry to file.
*
* Under normal circumstances, the entry will be in the
* replacement policy. In this, also update the replacement
* policy for flush.
*
* If pb_ptr->vfd_swmr_writer, it is possible that the target
* is a multi-page metadata entry. In this case, the entry
* is not in the replacement policy, and thus the policy
* should not be updated.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/14/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__flush_entry(H5F_t *f, H5PB_t *pb_ptr, H5PB_entry_t *entry_ptr)
{
haddr_t eoa; /* Current EOA for the file */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->lf);
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->size > 0);
HDassert(entry_ptr->size >= pb_ptr->page_size);
HDassert((entry_ptr->size == pb_ptr->page_size) || (entry_ptr->is_mpmde));
HDassert(entry_ptr->image_ptr);
HDassert(entry_ptr->is_dirty);
HDassert((pb_ptr->vfd_swmr_writer) || (!(entry_ptr->is_mpmde)));
HDassert(0 == entry_ptr->delay_write_until);
ldbgf("%s: flushing %zu-byte page %" PRIu64 " @ %" PRIuHADDR "\n",
__func__, entry_ptr->size, entry_ptr->page, entry_ptr->addr);
/* Retrieve the 'eoa' for the file */
if ( HADDR_UNDEF == (eoa = H5F_get_eoa(f, entry_ptr->mem_type)) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, \
"driver get_eoa request failed")
/* TODO: update the free space manager to inform the page buffer when
* space is de-allocated so that the following assertions will be
* true in all cases.
*/
/* Verify that the base addresss of the page is within the EOA. If it
* isn't, the associated page has been discarded and should have been
* removed from the page buffer. This is a bug in the HDF5 library, so
* an assertion is adequate here.
*/
HDassert( eoa > entry_ptr->addr );
/* Space at the end of the file should be allocate in increments of
* pages. Thus the entire page should be within the EOA. Again,
* an assertion is adequate here.
*/
HDassert( eoa >= entry_ptr->addr + entry_ptr->size );
/* flush the entry */
if ( H5FD_write(f->shared->lf, entry_ptr->mem_type, entry_ptr->addr,
entry_ptr->size, entry_ptr->image_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "file write failed")
/* mark the entry clean */
if ( H5PB__mark_entry_clean(pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, "mark entry clean failed")
/* if the entry is on the LRU, update the replacement policy */
if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
H5PB__UPDATE_RP_FOR_FLUSH(pb_ptr, entry_ptr, FAIL)
}
/* update stats for flush */
H5PB__UPDATE_STATS_FOR_FLUSH(pb_ptr, entry_ptr)
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__flush_entry() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__load_page
*
* Purpose: Load the page with the specified base address and insert
* it into the page buffer. If necessary and possible, make
* space for the new page first.
*
* Note that the size of the page is always pb_ptr->page_size,
* even in the VFD SWMR case, as in this context, multi-page
* metadata entries are always written in full, and they
* may only enter the page buffer as the result of a write.
*
* In the context of VFD SWMR, when a page is loaded from
* file, it is possible that the VFD SWMR writer must delay
* writes to the page to avoid the possibility of message from
* the future bugs on the VFD SWMR reader. For this reason,
* make note of the fact that the entry has been loaded from
* from file, so that the necessary checks can be made when
* writing to the page.
*
* Return: SUCCEED if no errors are encountered, and
* FAIL otherwise.
*
* Programmer: John Mainzer -- 10/18/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__load_page(H5F_t *f, H5PB_t *pb_ptr, haddr_t addr, H5FD_mem_t type,
H5PB_entry_t **entry_ptr_ptr)
{
hbool_t skip_read = FALSE;
haddr_t eof = HADDR_UNDEF;
H5PB_entry_t *entry_ptr = NULL;
void *image_ptr = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->lf);
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert((entry_ptr_ptr == NULL) || (*entry_ptr_ptr == NULL));
#if 0 /* JRM */
haddr_t eoa;
/* Retrieve the 'eoa' for the file */
if ( HADDR_UNDEF == (eoa = H5F_get_eoa(f, type)))
HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, \
"driver get_eoa request failed")
if ( addr + ((haddr_t)(pb_ptr->page_size)) > eoa )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"Attempt to load page that extends past EOA")
#endif /* JRM */
if ( HADDR_UNDEF == (eof = H5FD_get_eof(f->shared->lf, H5FD_MEM_DEFAULT)) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, \
"driver get_eof request failed")
#if 0
/* It is possible that this page been allocated but not
* written. Skip the read if addr > EOF. In this case, tell
* H5PB__create_new_page() to zero the page image.
*
* Don't set "skip_read = (addr >= eof);" when accumulator is used.
*/
skip_read = (addr >= eof);
#endif
/* make space in the page buffer if necessary */
if ( ( pb_ptr->curr_pages >= pb_ptr->max_pages ) &&
( H5PB__make_space(f, pb_ptr, type) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"H5PB__make_space() reports an error")
/* Create a new page buffer page and insert it into the page buffer */
if ( H5PB__create_new_page(pb_ptr, addr, (size_t)(pb_ptr->page_size),
type, skip_read, &entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"can't create new page buffer page")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == addr);
image_ptr = entry_ptr->image_ptr;
HDassert(image_ptr);
/* Read the contents of the page from file, and store it in the
* image buffer associated with the new entry.
*/
if ( ( ! skip_read ) &&
( H5FD_read(f->shared->lf, type, addr, entry_ptr->size, image_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"driver read request failed")
/* If in fact the page was read from file, make note of this fact
* for purposes of VFD SWMR delayed writes in the VFD SWMR writer.
*/
entry_ptr->loaded = ! skip_read;
H5PB__UPDATE_STATS_FOR_LOAD(pb_ptr, entry_ptr)
if ( entry_ptr_ptr ) {
*entry_ptr_ptr = entry_ptr;
}
done:
/* add cleanup in case of failure */
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__load_page() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__make_space
*
* Purpose: Evict one or more pages from the page buffer so as to
* reduce the size of the page buffer to pb_ptr->max_pages - 1.
* if possible.
*
* Note that the function must not be called under
* nonsensical conditions -- thus if either
*
* 1) the inserted type is metadata and min_rd_pages ==
* max_pages, or
*
* 2) the inserted type is raw data and min_md_pages ==
* max_pages
*
* holds, the function has been called in error, and an
* assertion failure is appropriate.
*
* If the page buffer is below its maximum size, we are
* done, and the function simply returns.
*
* Otherwise, scan upwards from the bottom of the LRU list,
* examining each entry in turn.
*
* If the entry is dirty, flush it, move it to the top of the
* LRU, and continue with the scan. Note in the VFD SWMR case,
* we do not have to concern ourselves with delayed writes in
* this context, as all entries which are subject to delayed
* writes must reside on the delayed write list, not the LRU list.
*
* If the entry is:
*
* 1) clean
*
* 2) either:
*
* a) the target entry is metadata and
* curr_md_pages > min_md_pages.
*
* b) the target entry is raw data and
* curr_rd_pages > min_rd_pages.
*
* c) the target entry is metadata, the inserted_type
* is metadata, and curr_md_pages == min_md_pages.
*
* d) the target entry is raw data, the inserted_type
* is raw data, and curr_rd_pages == min_rd_pages.
*
* 3) The entry is not on the tick list (which can only
* happen if pb_ptr->vfd_swmr_writer is TRUE).
*
* evict the entry and test to see if pb_ptr->curr_pages <
* pb_ptr->max_pages. If it is, return. Otherwise, continue
* the scan until either the above condidtion is fulfilled,
* or the head of the LRU is reach.
*
* Under normal circumstances, it should always be possible
* to reduce the size of the page buffer below pb_ptr->max_pages.
* However, due to prohibition on evicting entries on the
* tick list, and either flushing or evicting entries on the
* delayed write list, this will not in general be the case
* if pb_ptr->vfd_swmr_writer is TRUE. In this case, the
* page buffer may exceed its maximum size by an arbitrary
* amount.
*
* If this situation occurs with any regularity, we will
* need a mechanism to avoid attempts to make space when
* it is not possible to do so.
*
* Return: SUCCEED if no errors are encountered, and
* FAIL otherwise.
*
* Programmer: John Mainzer -- 10/14/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__make_space(H5F_t *f, H5PB_t *pb_ptr, H5FD_mem_t inserted_type)
{
hbool_t inserting_md;
H5PB_entry_t *search_ptr;
H5PB_entry_t *flush_ptr;
H5PB_entry_t *evict_ptr;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(f);
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->min_md_pages + pb_ptr->min_rd_pages <= pb_ptr->max_pages);
inserting_md = ( H5FD_MEM_DRAW != inserted_type );
if ( ( inserting_md ) && ( pb_ptr->min_rd_pages == pb_ptr->max_pages ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL,
"can't make space for metadata -- pb config for raw data only")
if ( ( ! inserting_md ) && ( pb_ptr->min_md_pages == pb_ptr->max_pages ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL,
"can't make space for raw data -- pb config for metadata only")
search_ptr = pb_ptr->LRU_tail_ptr;
while ( ( search_ptr ) && ( pb_ptr->curr_pages >= pb_ptr->max_pages ) ) {
HDassert(search_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
if ( search_ptr->modified_this_tick ) { /* entry is on tick list */
search_ptr = search_ptr->prev;
H5PB__UPDATE_STATS_FOR_LRU_TL_SKIP(pb_ptr);
} else if ( ( inserting_md ) &&
( ! (search_ptr->is_metadata) ) &&
( pb_ptr->curr_rd_pages <= pb_ptr->min_rd_pages ) ) {
search_ptr = search_ptr->prev;
H5PB__UPDATE_STATS_FOR_LRU_RD_SKIP(pb_ptr);
} else if ( ( ! inserting_md ) &&
( search_ptr->is_metadata ) &&
( pb_ptr->curr_md_pages <= pb_ptr->min_md_pages ) ) {
search_ptr = search_ptr->prev;
H5PB__UPDATE_STATS_FOR_LRU_MD_SKIP(pb_ptr);
} else if ( search_ptr->is_dirty ) {
/* One can make the argument that we should test for dirty
* entries first, instead of skipping potentially dirty
* entries in the above clauses. However, I suspect that
* this would result in excessive flushes. Lets try it
* this way for now.
*/
flush_ptr = search_ptr;
/* if the *search_ptr has a predecessor in the LRU,
* set set search_ptr equal to search_ptr->prev. Otherwise,
* leave search_ptr unchanged, so that it can be examined
* on the next pass through the while loop after it has been
* flushed.
*/
if ( search_ptr->prev ) {
search_ptr = search_ptr->prev;
}
if ( H5PB__flush_entry(f, pb_ptr, flush_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"Can't flush entry")
} else { /* evict the entry */
evict_ptr = search_ptr;
search_ptr = search_ptr->prev;
if ( H5PB__evict_entry(pb_ptr, evict_ptr, FALSE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"Can't evict entry")
}
}
HDassert( ( search_ptr == NULL ) ||
( pb_ptr->curr_pages < pb_ptr->max_pages ) );
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__make_space() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__mark_entry_clean
*
* Purpose: Mark the target entry clean
*
* This function is typically used when an entry has been
* completely overwritten and is about to be evicted. In
* this case, the entry must be marked clean to avoid
* sanity check failures on evictions.
*
* While this function does update the index for the
* entry clean, it does not update the replacement policy.
* If this is desired, it must be done by the caller.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/14/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__mark_entry_clean(H5PB_t *pb_ptr, H5PB_entry_t *entry_ptr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->size > 0);
HDassert(entry_ptr->size >= pb_ptr->page_size);
HDassert((entry_ptr->size == pb_ptr->page_size) || (entry_ptr->is_mpmde));
HDassert(entry_ptr->image_ptr);
HDassert((pb_ptr->vfd_swmr_writer) || (!(entry_ptr->is_mpmde)));
/* mark the entry clean */
entry_ptr->is_dirty = FALSE;
/* update the index for the entry clean */
H5PB__UPDATE_INDEX_FOR_ENTRY_CLEAN(pb_ptr, entry_ptr)
/* don't update the replacement policy -- this will be done by
* the caller if desired.
*/
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__mark_entry_clean() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__mark_entry_dirty
*
* Purpose: Mark the target entry as dirty.
*
* If pb_ptr->vfd_swmr_writer is FALSE, the entry will be
* in the replacement policy. In this, we simply mark the
* entry as dirty, and update the replacement policy for an
* access.
*
* If pb_ptr->vfd_swmr_writer, it is possible that we must
* delay writes to the target page or multi-page metadata
* entry to avoid message from the future bugs on the VFD
* SWMR readers. In such cases we must set the
* delay_write_until field and insert the entry on the
* delayed write list instead of the replacement policy.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/14/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__mark_entry_dirty(H5F_t * f, H5PB_t *pb_ptr, H5PB_entry_t *entry_ptr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* sanity checks */
HDassert(pb_ptr);
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->size > 0);
HDassert(entry_ptr->size >= pb_ptr->page_size);
HDassert((entry_ptr->size == pb_ptr->page_size) || (entry_ptr->is_mpmde));
HDassert(entry_ptr->image_ptr);
HDassert((pb_ptr->vfd_swmr_writer) || (!(entry_ptr->is_mpmde)));
/* mark the entry dirty if necessary */
if ( ! ( entry_ptr->is_dirty ) ) {
entry_ptr->is_dirty = TRUE;
H5PB__UPDATE_INDEX_FOR_ENTRY_DIRTY(pb_ptr, entry_ptr)
/* since the entry was clean, there can be no pending delayed write */
HDassert(entry_ptr->delay_write_until == 0);
if ( ( pb_ptr->vfd_swmr_writer ) &&
( entry_ptr->loaded ) &&
( entry_ptr->mem_type != H5FD_MEM_DRAW ) &&
( H5F_vfd_swmr_writer__delay_write(f, entry_ptr->page,
&(entry_ptr->delay_write_until)) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"get delayed write request failed")
if ( entry_ptr->delay_write_until > 0 ) {
if ( ! ( entry_ptr->is_mpmde ) ) {
/* remove the entry from the replacement policy */
H5PB__UPDATE_RP_FOR_REMOVE(pb_ptr, entry_ptr, FAIL)
}
H5PB__INSERT_IN_DWL(pb_ptr, entry_ptr, FAIL)
} else if ( ! (entry_ptr->is_mpmde) ) {
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
} else {
/* the entry should be a multi-page metadata entry that
* has been modified this tick. Thus no action is required.
*/
HDassert(entry_ptr->is_mpmde);
HDassert(pb_ptr->vfd_swmr_writer);
}
} else if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
/* the entry is dirty and on the replacement policy -- just update
* the replacement policy for an access
*/
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5PB__mark_entry_dirty() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__read_meta
*
* Purpose: Satisfy a metadata read in cases 7, 8, 9, and 10)
* H5PB_read(). Specifically:
*
* 6) If the read is for metadata and not page aligned, clip
* the read to the end of the current page if necessary.
* Load the relevant page if necessary and satisfy the
* read from the page buffer. Note that it there is an
* existing page, it must not be a multi-page metadata
* entry. It it is, flag an error.
*
* 7) If the read is for metadata, is page aligned, is larger
* than one page, and there is no entry in the page buffer,
* satisfy the read from the file
*
* 8) If the read is for metadata, is page aligned, is larger
* than one page, and there is a regular entry at the target
* page address, test to see if the last read was for the
* same address.
*
* If was, evict the page, and satisfy the read from file.
* Flag an error if the page was dirty.
*
* If the last read was for a different page, clip the read
* to one page, and satisfy the read from the existing
* regular entry.
*
* 9) If the read is for metadata, is page aligned, is larger
* than one page, and there is a multi-page metadata entry
* at the target page address, test to see if
* pb_ptr->vfd_swmr_write is TRUE.
*
* If it is, satisfy the read from the multi-page metadata
* entry, clipping the read if necessary.
*
* if pb_ptr->vfd_swmr_write is FALSE, flag an error.
*
* 10) If the read is for metadata, is page aligned, is no
* larger than a page, test to see if the page buffer
* contains a page at the target address.
*
* If it doesn't, load the page and satisfy the read
* from it.
*
* If it contains a regular page entry, satisfy the read
* from it.
*
* If it contains a multipage metadata entry at the target
* address, satisfy the read from the multi-page metadata
* entry if pb_ptr->vfd_swmr_write is TRUE, and flag an
* error otherwise.
*
* The above case analysis may be a bit hard to read. If so,
* the table shown below may help to clarify. Here:
*
* P/A == page aligned
* size > PL == size > page length
* PA == previous address
* A == current address
*
* In the entry exists column:
*
* N == no entry
* R == regular (1 page) entry
* MPMDE == multi-page metadata entry
*
* | size | entry | VFD | |
* P/A: | > PL | exists | SWMR | PA == A | Comments:
* ------+------+--------+------+---------+-------------------------------------
* N | X | N || R | X | X | Clip read to page boundary if
* | | | | | necessary
* | | | | | Load entry if necessary
* | | | | | Satisfy read from entry (case 6)
* ------+------+--------+------+---------+-------------------------------------
* N | X | MPMDE | X | X | Error (case 6)
* ------+------+--------+------+---------+-------------------------------------
* | | | | |
* ------+------+--------+------+---------+-------------------------------------
* Y | Y | N | X | X | Satisfy read from file (case 7)
* ------+------+--------+------+---------+-------------------------------------
* Y | Y | R | X | N | Clip read to page boundary
* | | | | | Satisfy read from entry (case 8)
* ------+------+--------+------+---------+-------------------------------------
* Y | Y | R | X | Y | Evict entry
* | | | | | (must be clean -- flag error if not)
* | | | | | Satisfy read from file (case 8)
* ------+------+--------+------+---------+-------------------------------------
* Y | Y | MPMDE | N | X | Error (case 9)
* ------+------+--------+------+---------+-------------------------------------
* Y | Y | MPMDE | Y | X | Clip read to MPE size if required.
* | | | | | Satify read from MPE (case 9)
* ------+------+--------+------+---------+-------------------------------------
* | | | | |
* ------+------+--------+------+---------+-------------------------------------
* Y | N | N | X | X | Load entry
* | | | | | Satisfy read from entry (case 10)
* ------+------+--------+------+---------+-------------------------------------
* Y | N | R | X | X | Satisfy read from entry (case 10)
* ------+------+--------+------+---------+-------------------------------------
* Y | N | MPMDE | Y | X | Satisfy read from entry (case 10)
* ------+------+--------+------+---------+-------------------------------------
* Y | N | MPMDE | N | X | Error (case 10)
* ------+------+--------+------+---------+-------------------------------------
*
* Observe that the above cases imply that:
*
* 1) The page buffer is defined.
*
* 2) The page buffer has been configured to accept at least
* one page of metadata.
*
* 3) This is a metadata read.
*
* Note also that if the metadata read is of size
* no larger than page size, it may not cross page
* boundaries.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__read_meta(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
void *buf/*out*/)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
H5PB_entry_t *entry_ptr; /* Pointer to page buffer entry */
H5FD_t *file; /* File driver pointer */
uint64_t page; /* page offset of addr */
haddr_t page_addr; /* page containg addr */
static haddr_t prev_addr = HADDR_UNDEF; /* addr of last call */
size_t offset; /* offset of read in page */
size_t clipped_size; /* possibley clipped size */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->min_rd_pages < pb_ptr->max_pages);
HDassert(f->shared->lf);
file = f->shared->lf;
HDassert(H5FD_MEM_DRAW != type);
HDassert(buf);
/* Calculate the aligned address of the first page */
page = (addr / pb_ptr->page_size);
page_addr = page * pb_ptr->page_size;
if ( page_addr != addr ) { /* case 6 */
/* If the read is for metadata and not page aligned, clip
* the read to the end of the current page if necessary.
* Load the relevant page if necessary and satisfy the
* read from the page buffer. Note that it there is an
* existing page, it must not be a multi-page metadata
* entry. It it is, flag an error.
*/
offset = addr - page_addr;
if ( (offset + size) <= pb_ptr->page_size ) {
clipped_size = size;
} else {
clipped_size = size - ( (offset + size) - pb_ptr->page_size);
}
HDassert( clipped_size > 0 );
HDassert( clipped_size <= size );
HDassert( (offset + clipped_size) <= pb_ptr->page_size );
/* get the containing page */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, ((entry_ptr) != NULL), \
TRUE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, page_addr, type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (1)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == page_addr);
HDassert(entry_ptr->is_metadata);
HDassert(!(entry_ptr->is_mpmde));
/* copy data from the page into read buffer */
HDmemcpy((uint8_t *)buf, (uint8_t *)(entry_ptr->image_ptr) + offset,
clipped_size);
/* if the entry is on the LRU, update the replacement policy */
if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
} else {
HDassert( page_addr == addr );
if ( size >= pb_ptr->page_size ) {
/* search the page buffer for an entry at page */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
if ( entry_ptr == NULL ) { /* case 7 */
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, FALSE, TRUE, size > pb_ptr->page_size)
/* If the read is for metadata, is page aligned, is larger
* than one page, and there is no entry in the page buffer,
* satisfy the read from the file
*/
if ( H5FD_read(file, type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"driver read request failed (1)")
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
} else {
HDassert( entry_ptr );
HDassert( entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC );
HDassert( entry_ptr->is_metadata );
if ( ! ( entry_ptr->is_mpmde ) ) { /* case 8 */
/* If the read is for metadata, is page aligned, is larger
* than one page, and there is a regular entry at the target
* page address, test to see if the last read was for the
* same address.
*
* If was, evict the page, and satisfy the read from file.
* Flag an error if the page was dirty.
*
* If the last read was for a different page, clip the read
* to one page, and satisfy the read from the existing
* regular entry.
*/
HDassert( entry_ptr->size == pb_ptr->page_size );
if ( addr == prev_addr ) {
/* since this is a second try, don't update
* hit rate stats.
*/
HDassert( ! ( entry_ptr->is_dirty ) );
if ( H5PB__evict_entry(pb_ptr, entry_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"forced eviction failed (1)")
if ( H5FD_read(file, type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"driver read request failed (2)")
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
} else {
HDassert( entry_ptr->image_ptr );
/* copy data from the page into read buffer */
HDmemcpy((uint8_t *)buf,
(uint8_t *)(entry_ptr->image_ptr),
entry_ptr->size);
/* if the entry is on the LRU, update the replacement
* policy
*/
if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, TRUE, TRUE, FALSE)
}
} else { /* case 9 */
/* If the read is for metadata, is page aligned, is larger
* than one page, and there is a multi-page metadata entry
* at the target page address, test to see if
* pb_ptr->vfd_swmr_write is TRUE.
*
* If it is, satisfy the read from the multi-page metadata
* entry, clipping the read if necessary.
*
* if pb_ptr->vfd_swmr_write is FALSE, flag an error.
*/
HDassert( entry_ptr->is_mpmde );
HDassert( pb_ptr->vfd_swmr_writer );
if ( size > entry_ptr->size ) {
clipped_size = entry_ptr->size;
} else {
clipped_size = size;
}
/* copy data from the page into read buffer */
HDmemcpy((uint8_t *)buf, (uint8_t *)(entry_ptr->image_ptr),
clipped_size);
/* if the entry is on the LRU, update the replacement
* policy
*/
if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, TRUE, TRUE, TRUE)
}
}
} else { /* case 10 */
/* If the read is for metadata, is page aligned, is no
* larger than a page, test to see if the page buffer
* contains a page at the target address.
*
* If it doesn't, load the page and satisfy the read
* from it.
*
* If it contains a regular page entry, satisfy the read
* from it.
*
* If it contains a multipage metadata entry at the target
* address, satisfy the read from the multi-page metadata
* entry if pb_ptr->vfd_swmr_write is TRUE, and flag an
* error otherwise.
*/
HDassert( size <= pb_ptr->page_size );
/* get the containing page */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
TRUE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, page_addr, type, &entry_ptr) < 0))
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (2)")
HDassert( entry_ptr );
HDassert( entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC );
HDassert( entry_ptr->is_metadata );
HDassert( ( ! ( entry_ptr->is_mpmde ) ) ||
( pb_ptr->vfd_swmr_writer) );
/* copy data from the page into read buffer */
HDmemcpy((uint8_t *)buf, (uint8_t *)(entry_ptr->image_ptr), size);
/* if the entry is on the LRU, update the replacement policy */
if ( ( ! (entry_ptr->is_mpmde) ) &&
( entry_ptr->delay_write_until == 0 ) ) {
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
}
}
prev_addr = addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB__read_meta() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__read_raw
*
* Purpose: Satisfy a raw data read in cases 3 and 4 from H5PB_read().
* Specifically:
*
* 3) If the read is for raw data, and it is larger than the
* page size, read it directly from the HDF5 file.
*
* It is possible that the page buffer contains dirty pages
* that intersect with the read -- test for this and update
* the read buffer from the page buffer if any such pages
* exist.
*
* Note that no pages are inserted into the page buffer in
* this case.
*
* 4) If the read is for raw data, and it is of size less
* than or equal to the page size, satisfy the read from
* the page buffer, loading and inserting pages into the
* page buffer as necessary
*
* Observe that this implies that:
*
* 1) The page buffer is defined.
*
* 2) The page buffer has been configured to accept at least
* one page of raw data.
*
* 2) This is a raw data read.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__read_raw(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
void *buf/*out*/)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
H5PB_entry_t *entry_ptr; /* Pointer to page buffer entry */
uint64_t first_page; /* page offset of first I/O */
uint64_t last_page; /* page offset of last I/O */
uint64_t search_page; /* page offset of current page */
haddr_t first_page_addr; /* address of first page of I/O */
haddr_t last_page_addr; /* address of last page of I/O */
haddr_t search_addr; /* Address of current page */
hsize_t num_touched_pages; /* Number of pages accessed */
size_t offset; /* offset of read in page */
size_t length; /* length of read in page */
hsize_t i; /* Local index variable */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->min_md_pages < pb_ptr->max_pages);
HDassert(H5FD_MEM_DRAW == type);
/* Calculate the aligned address of the first page */
first_page = (addr / pb_ptr->page_size);
first_page_addr = first_page * pb_ptr->page_size;
/* Calculate the aligned address of the last page */
last_page = ((addr + size - 1) / pb_ptr->page_size);
last_page_addr = last_page * pb_ptr->page_size;
/* Calculate number of pages that this read spans. */
num_touched_pages = last_page - first_page + 1;
if ( first_page_addr == last_page_addr ) {
HDassert(1 == num_touched_pages);
last_page_addr = HADDR_UNDEF;
}
/* case 3) raw data read of page size or greater. */
if ( size >= pb_ptr->page_size ) {
if ( H5FD_read(f->shared->lf, type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"read through metadata accumulator failed")
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
/* For each page that intersects with the above read, check to see
* if it exists in the page buffer, and if so, if it is dirty.
*
* If it does and is, update the read buffer with the contents
* of the page so we get the up to date data into the buffer
* after the big read from the file.
*/
search_page = first_page;
search_addr = first_page_addr;
for(i = 0; i < num_touched_pages; i++) {
H5PB__SEARCH_INDEX(pb_ptr, search_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( entry_ptr ) {
HDassert( entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC );
HDassert( ! ( entry_ptr->is_metadata ) );
HDassert( entry_ptr->page == search_page );
HDassert( entry_ptr->addr == search_addr );
HDassert( entry_ptr->size == pb_ptr->page_size );
HDassert( entry_ptr->delay_write_until == 0 );
HDassert( entry_ptr->addr <= addr + size );
HDassert( entry_ptr->addr + entry_ptr->size <= addr + size );
if ( entry_ptr->is_dirty ) {
if ( i == 0 ) {
/* handle the possible partial access of the
* first page.
*/
HDassert( search_addr == first_page_addr );
HDassert( search_page == first_page );
offset = addr - first_page_addr;
HDassert((( offset == 0 ) && (search_addr == addr )) ||
(( offset > 0 ) && ( search_addr < addr )));
HDassert(pb_ptr->page_size >= offset);
HDassert( size >= pb_ptr->page_size - (size_t)offset );
HDmemcpy(buf, (uint8_t *)entry_ptr->image_ptr + offset,
pb_ptr->page_size - (size_t)offset);
} else if ( i == num_touched_pages - 1 ) {
/* handle the possible partial access of the
* last page.
*/
HDassert( i > 0 );
HDassert( search_addr == last_page_addr );
HDassert( search_page == last_page );
HDassert( addr < last_page_addr );
HDassert( last_page_addr < addr + size );
offset = (num_touched_pages - 2) * pb_ptr->page_size +
(pb_ptr->page_size - (addr - first_page_addr));
HDmemcpy((uint8_t *)buf + offset, entry_ptr->image_ptr,
(size_t)((addr + size) - last_page_addr));
} else {
/* this is an internal page -- copy it in its
* entireity.
*/
offset = (i - 1) * pb_ptr->page_size +
(pb_ptr->page_size - (addr - first_page_addr));
HDassert ( addr + offset == search_addr );
HDassert ( offset + pb_ptr->page_size <= size );
HDmemcpy(((uint8_t *)(buf) + offset),
entry_ptr->image_ptr,
pb_ptr->page_size);
}
/* we have touched the entry -- move it to the top
* of the LRU if it resides there.
*
* The entry will be on the LRU if both it is not
* a multi-page metadata entry and it is not
* subject to a delayed write.
*
* As this is a raw data page buffer entry, both of
* these must be true, and are asserted above.
*
* Thus, just update the LRU.
*/
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
} /* if ( entry_ptr->is_dirty ) */
} /* if ( entry_ptr ) */
search_page++;
search_addr += pb_ptr->page_size;
} /* end for */
} else {
/* case 4: Raw data read of size less than page size.
*
* In this case, read the desired data from the page buffer, loading
* pages if necessary.
*/
HDassert(size < pb_ptr->page_size);
/* first page */
offset = addr - first_page_addr;
if ( (offset + size) <= pb_ptr->page_size ) {
HDassert(num_touched_pages == 1);
length = size;
} else {
HDassert(num_touched_pages == 2);
length = size - (pb_ptr->page_size - offset);
}
/* get the first page */
H5PB__SEARCH_INDEX(pb_ptr, first_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, first_page_addr,
type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (1)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == first_page_addr);
/* copy data from first page into read buffer */
HDmemcpy((uint8_t *)buf, ((uint8_t *)(entry_ptr->image_ptr) + offset),
length);
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
/* second page, if it exists */
if ( num_touched_pages == 2 ) {
offset = length;
length = size - offset;
HDassert(offset + length == size);
/* get the second page */
H5PB__SEARCH_INDEX(pb_ptr, last_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, last_page_addr,
type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (2)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == last_page_addr);
HDassert(entry_ptr->page == last_page);
/* copy data from second page into read buffer */
HDmemcpy(((uint8_t *)(buf) + offset),
(uint8_t *)(entry_ptr->image_ptr), length);
H5PB__UPDATE_RP_FOR_ACCESS(pb_ptr, entry_ptr, FAIL)
}
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB__read_raw() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__write_meta
*
* Purpose: Satisfy a metadata write in cases 7 and 8 from H5PB_write().
* Specifically:
*
* 7) If the write is of metadata, the write is larger than
* one page, and vfd_swmr_writer is TRUE, the write must
* buffered in the page buffer until the end of the tick.
*
* If it doesn't exist already, create a multi-page metadata
* entry in the page buffer and copy the write into it.
* Insert the new entry in the tick list if necessary.
*
* Test to see if the write of the multi-page metadata
* entry must be delayed. If so, place the entry in
* the delayed write list. Otherwise, the multi-page
* metadata entry will be written to the HDF5 file and
* evicted when the tick list is released at the of the
* tick.
*
* 8) If the write is of metadata, and the write is of size
* less than or equal to the page size, write the data
* into the page buffer, loading and inserting a page
* if necessary.
*
* If, in addition, vfd_swmr_writer is TRUE, we must:
*
* * add the page touched by the write to the tick list
* so that it will be buffered until the end of the
* tick.
*
* * test to see if the write must be delayed, and
* add the page to the delayed write list if so.
*
* Observe that this implies that:
*
* 1) The page buffer is defined.
*
* 2) The page buffer has been configured to accept at least
* one page of metadata.
*
* 3) This is a metadata write.
*
* Note also that if the metadata write is of size
* no larger than page size, it may not cross page
* boundaries.
*
* Further, for writes larger than page size (case 7 only),
* the base address must be page aligned.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__write_meta(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
const void *buf/*in*/)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
H5PB_entry_t *entry_ptr; /* Pointer to page buffer entry */
uint64_t page; /* page offset of addr */
haddr_t page_addr; /* page containg addr */
size_t offset; /* offset of write in page */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->min_rd_pages < pb_ptr->max_pages);
HDassert(H5FD_MEM_DRAW != type);
HDassert(buf);
/* Calculate the aligned address of the first page */
page = (addr / pb_ptr->page_size);
page_addr = page * pb_ptr->page_size;
/* if size > pb_ptr->page_size, addr must be page aligned */
HDassert((size <= pb_ptr->page_size) || (addr == page_addr));
/* case 7) metadata write of size greater than page size. */
if ( size > pb_ptr->page_size ) {
/* The write must be for a multi-page metadata entry, and
* we must be running as a VFD SWMR writer.
*
* This requires the following actions:
*
* 1) If the multi-page metadata entry is not already in the
* page buffer, create an entry for it.
*
* 2) Overwrite the image of the entry with the write buffer.
*
* 3) If the entry is not alread on the tick list, add it to
* the tick list.
*
* 4) If the entry is not alread on the delayed write list,
* test to see if it should be, and move it from the
* LRU to the delayed write list and set the delay_write_until
* field appropriately.
*
* This is done via the call to H5PB__mark_entry_dirty()
*/
HDassert(pb_ptr->vfd_swmr_writer);
HDassert(addr == page_addr);
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
TRUE, TRUE)
if ( NULL == entry_ptr ) {
/* the multi-page metadata entry is not currently in the page
* buffer. Create an entry for it, and insert it into the LRU.
*
* Don't bother to try to make space for it, as VFD SWMR
* ignores the limits on page buffer size.
*/
if ( H5PB__create_new_page(pb_ptr, addr, size, type,
FALSE, &entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"can't create new page buffer page")
/* set entry_ptr->loaded to TRUE so as to trigger the
* the delayed write test in H5PB__mark_entry_dirty().
*/
entry_ptr->loaded = TRUE;
}
/* at this point, one way or the other, the multi-page metadata
* entry must be in the page buffer.
*/
HDassert(entry_ptr->is_metadata);
HDassert(entry_ptr->is_mpmde);
HDassert(size == entry_ptr->size);
HDassert(type == entry_ptr->mem_type);
/* overwrite the entry image with the write buffer */
HDmemcpy((uint8_t *)(entry_ptr->image_ptr), buf, size);
/* mark the entry dirty */
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (1)")
/* insert in tick list if not there already */
if ( ! ( entry_ptr->modified_this_tick ) ) {
entry_ptr->modified_this_tick = TRUE;
H5PB__INSERT_IN_TL(pb_ptr, entry_ptr, FAIL)
}
} else {
/* case 8) metadata write of size no larger than page size */
offset = addr - page_addr;
/* write cannot cross page boundaries. */
HDassert((offset + size) <= pb_ptr->page_size);
/* get the containing page */
H5PB__SEARCH_INDEX(pb_ptr, page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
TRUE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, page_addr, type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (1)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == page_addr);
HDassert(entry_ptr->is_metadata);
HDassert(!(entry_ptr->is_mpmde));
HDassert(entry_ptr->size == pb_ptr->page_size);
HDassert(size <= entry_ptr->size);
/* copy data from the write buffer into the page image */
HDmemcpy(((uint8_t *)(entry_ptr->image_ptr) + offset),
(const uint8_t *)buf, size);
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (2)")
if ( pb_ptr->vfd_swmr_writer ) {
/* test to see if the entry is on the tick list, and insert
* it if it is not. This will force the page buffer to retain
* the page until the end of the tick.
*/
if ( ! ( entry_ptr->modified_this_tick ) ) {
entry_ptr->modified_this_tick = TRUE;
H5PB__INSERT_IN_TL(pb_ptr, entry_ptr, FAIL)
}
}
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB__write_meta() */
/*-------------------------------------------------------------------------
*
* Function: H5PB__write_raw
*
* Purpose: Satisfy a raw data write in cases 3 and 4 from H5PB_write().
* Specifically:
*
* 3) If the write is raw data, and it of page size or
* larger, write directly to the HDF5 file.
*
* It is possible that the write intersects one or more
* pages in the page buffer -- test for this and update
* any partially written pages, and evict any pages
* that are completely overwritten.
*
* Note that no pages are inserted into the page buffer in
* this case.
*
* 4) If the write is of raw data, and it is of size less
* than the page size, write the page into the page
* buffer, loading and inserting pages into the
* page buffer as necessary
*
* Observe that this implies that:
*
* 1) The page buffer is defined.
*
* 2) The page buffer has been configured to accept at least
* one page of raw data.
*
* 2) This is a raw data write.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: John Mainzer -- 10/11/18
*
* Changes: None.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5PB__write_raw(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
const void *buf/*out*/)
{
H5PB_t *pb_ptr; /* Page buffer for this file */
H5PB_entry_t *entry_ptr; /* Pointer to page buffer entry */
uint64_t first_page; /* page offset of first I/O */
uint64_t last_page; /* page offset of last I/O */
uint64_t search_page; /* page offset of current page */
haddr_t first_page_addr; /* address of first page of I/O */
haddr_t last_page_addr; /* address of last page of I/O */
haddr_t search_addr; /* Address of current page */
hsize_t num_touched_pages; /* Number of pages accessed */
hsize_t i; /* Local index variable */
size_t length; /* length of write in a page */
size_t offset; /* offset of write in a page */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f);
HDassert(f->shared);
HDassert(f->shared->pb_ptr);
pb_ptr = f->shared->pb_ptr;
HDassert(pb_ptr->magic == H5PB__H5PB_T_MAGIC);
HDassert(pb_ptr->min_md_pages < pb_ptr->max_pages);
HDassert(f->shared->lf);
HDassert(H5FD_MEM_DRAW == type);
/* Calculate the aligned address of the first page */
first_page = (addr / pb_ptr->page_size);
first_page_addr = first_page * pb_ptr->page_size;
/* Calculate the aligned address of the last page */
last_page = ((addr + size - 1) / pb_ptr->page_size);
last_page_addr = last_page * pb_ptr->page_size;
/* Calculate number of pages that this read spans. */
num_touched_pages = last_page - first_page + 1;
if ( first_page_addr == last_page_addr ) {
HDassert(1 == num_touched_pages);
last_page_addr = HADDR_UNDEF;
}
/* case 3) raw data write of page size or greater. */
if ( size >= pb_ptr->page_size ) {
if ( H5FD_write(f->shared->lf, type, addr, size, buf) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, \
"write through metadata accumulator failed")
H5PB__UPDATE_STATS_FOR_BYPASS(pb_ptr, type, size);
/* For each page that intersects with the above write, check to see
* if it exists in the page buffer.
*
* If it does and is, and if the write overwrites page fully,
* mark the page clean and evict it.
*
* If the write only partially intersects a page, update the
* page and mark it dirty.
*/
search_page = first_page;
search_addr = first_page_addr;
for(i = 0; i < num_touched_pages; i++) {
H5PB__SEARCH_INDEX(pb_ptr, search_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( entry_ptr ) {
HDassert( entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC );
HDassert( ! ( entry_ptr->is_metadata ) );
HDassert( entry_ptr->page == search_page );
HDassert( entry_ptr->addr == search_addr );
HDassert( entry_ptr->size == pb_ptr->page_size );
HDassert( entry_ptr->delay_write_until == 0 );
HDassert( entry_ptr->addr <= addr + size );
if ( ( addr <= entry_ptr->addr ) &&
( entry_ptr->addr + entry_ptr->size <= addr + size ) ) {
/* the page is completely overwritten -- mark it clean
* and evict it.
*/
if ( ( entry_ptr->is_dirty ) &&
( H5PB__mark_entry_clean(pb_ptr, entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry clean failed")
if ( H5PB__evict_entry(pb_ptr, entry_ptr, TRUE) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"forced eviction failed (1)")
} else if ( i == 0 ) {
/* handle partial overwrite of the first page. */
HDassert( search_addr == first_page_addr );
HDassert( search_page == first_page );
HDassert( search_addr < addr );
HDassert( entry_ptr->addr + entry_ptr->size <=
addr + size );
offset = addr - first_page_addr;
HDassert( offset > 0 );
HDassert( pb_ptr->page_size >= offset );
HDassert( size >= pb_ptr->page_size - (size_t)offset );
HDmemcpy((uint8_t *)entry_ptr->image_ptr + offset, buf,
pb_ptr->page_size - (size_t)offset);
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (1)")
} else if ( i == num_touched_pages - 1 ) {
/* handle partial overwrite of the last page. */
HDassert( i > 0 );
HDassert( search_addr == last_page_addr );
HDassert( search_page == last_page );
HDassert( addr < last_page_addr );
HDassert( last_page_addr < addr + size );
offset = (num_touched_pages - 2) * pb_ptr->page_size +
(pb_ptr->page_size - (addr - first_page_addr));
HDmemcpy(entry_ptr->image_ptr,
(const uint8_t *)buf + offset,
(size_t)((addr + size) - last_page_addr));
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (2)")
} else {
/* this should be un-reachable */
HDassert(FALSE);
}
} /* if ( entry_ptr ) */
search_page++;
search_addr += pb_ptr->page_size;
} /* end for */
} else {
/* case 4: Raw data write of size less than page size.
*
* In this case, write the data to the page buffer, loading
* pages if necessary.
*/
HDassert(size < pb_ptr->page_size);
/* first page */
offset = addr - first_page_addr;
if ( (offset + size) <= pb_ptr->page_size ) {
HDassert(num_touched_pages == 1);
length = size;
} else {
HDassert(num_touched_pages == 2);
length = pb_ptr->page_size - offset;
HDassert( offset + length == pb_ptr->page_size );
}
/* get the first page */
H5PB__SEARCH_INDEX(pb_ptr, first_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, first_page_addr,
type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (1)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == first_page_addr);
/* copy data from the write buffer into the first page */
HDmemcpy(((uint8_t *)(entry_ptr->image_ptr)) + offset,
(const uint8_t *)buf, length);
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (3)")
/* second page, if it exists */
if ( num_touched_pages == 2 ) {
offset = length;
length = size - offset;
HDassert(offset + length == size);
/* get the first page */
H5PB__SEARCH_INDEX(pb_ptr, last_page, entry_ptr, FAIL)
/* update hit rate stats */
H5PB__UPDATE_PB_HIT_RATE_STATS(pb_ptr, (entry_ptr != NULL), \
FALSE, FALSE)
if ( ( NULL == entry_ptr ) &&
( H5PB__load_page(f, pb_ptr, last_page_addr,
type, &entry_ptr) < 0 ) )
HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, \
"page buffer page load request failed (2)")
HDassert(entry_ptr);
HDassert(entry_ptr->magic == H5PB__H5PB_ENTRY_T_MAGIC);
HDassert(entry_ptr->addr == last_page_addr);
HDassert(entry_ptr->page == last_page);
/* copy data from the write buffer into the first page */
HDmemcpy((uint8_t *)(entry_ptr->image_ptr),
((const uint8_t *)(buf) + offset), length);
if ( H5PB__mark_entry_dirty(f, pb_ptr, entry_ptr) < 0 )
HGOTO_ERROR(H5E_PAGEBUF, H5E_SYSTEM, FAIL, \
"mark entry dirty failed (3)")
}
}
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5PB__write_raw() */
|