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
|
/*
* Copyright (C) 1998 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, March 12, 1998
*/
#undef NDEBUG
#include <assert.h>
#include <fcntl.h>
#include <hdf5.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#define RAW_FILE_NAME "iopipe.raw"
#define HDF5_FILE_NAME "iopipe.h5"
#define HEADING "%-16s"
#define PROGRESS '='
#if 1
/* Normal testing */
#define REQUEST_SIZE_X 4579
#define REQUEST_SIZE_Y 4579
#define NREAD_REQUESTS 45
#define NWRITE_REQUESTS 45
#else
/* Speedy testing */
#define REQUEST_SIZE_X 1000
#define REQUEST_SIZE_Y 1000
#define NREAD_REQUESTS 45
#define NWRITE_REQUESTS 45
#endif
/*-------------------------------------------------------------------------
* Function: print_stats
*
* Purpose: Prints statistics
*
* Return: void
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void
print_stats (const char *prefix,
struct rusage *r_start, struct rusage *r_stop,
struct timeval *t_start, struct timeval *t_stop,
size_t nbytes)
{
double u_time, s_time, e_time, bw;
u_time = (r_stop->ru_utime.tv_sec+r_stop->ru_utime.tv_usec/1000000.0) -
(r_start->ru_utime.tv_sec+r_start->ru_utime.tv_usec/1000000.0);
s_time = (r_stop->ru_stime.tv_sec+r_stop->ru_stime.tv_usec/1000000.0) -
(r_start->ru_stime.tv_sec+r_start->ru_stime.tv_usec/1000000.0);
e_time = (t_stop->tv_sec+t_stop->tv_usec/1000000.0) -
(t_start->tv_sec+t_start->tv_usec/1000000.0);
bw = nbytes / e_time;
printf (HEADING "%1.2fuser %1.2fsystem %1.2felapsed %1.2fMB/s\n",
prefix, u_time, s_time, e_time, bw/(1024*1024));
}
/*-------------------------------------------------------------------------
* Function: synchronize
*
* Purpose:
*
* Return: void
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void
synchronize (void)
{
#ifdef HAVE_SYSTEM
system ("sync");
system ("df >/dev/null");
#if 0
/*
* This works well on Linux to get rid of all cached disk buffers. The
* number should be approximately the amount of RAM in MB. Do not
* include swap space in that amount or the command will fail.
*/
system ("/sbin/swapout 128");
#endif
#endif
}
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose:
*
* Return: Success:
*
* Failure:
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
main (void)
{
static size_t size[2] = {REQUEST_SIZE_X, REQUEST_SIZE_Y};
static int nread=NREAD_REQUESTS, nwrite=NWRITE_REQUESTS;
unsigned char *the_data = NULL;
hid_t file, dset, file_space=-1;
herr_t status;
struct rusage r_start, r_stop;
struct timeval t_start, t_stop;
int i, fd;
ssize_t n;
off_t offset;
int start[2];
size_t count[2];
printf ("I/O request size is %1.1fMB\n", (size[0]*size[1])/(1024.0*1024));
/* Open the files */
file = H5Fcreate (HDF5_FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
assert (file>=0);
fd = open (RAW_FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
assert (fd>=0);
/* Create the dataset */
file_space = H5Screate_simple (2, size, size);
assert (file_space>=0);
dset = H5Dcreate (file, "dset", H5T_NATIVE_UCHAR, file_space, H5P_DEFAULT);
assert (dset>=0);
the_data = malloc (size[0]*size[1]);
memset (the_data, 0xAA, size[0]*size[1]); /*initial fill for lazy malloc*/
/* Fill raw */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "fill raw");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
memset (the_data, 0xAA, size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("fill raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Fill hdf5 */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "fill hdf5");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("fill hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Write the raw dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "out raw");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
offset = lseek (fd, 0, SEEK_SET);
assert (0==offset);
n = write (fd, the_data, size[0]*size[1]);
assert (n==size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("out raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Write the hdf5 dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "out hdf5");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dwrite (dset, H5T_NATIVE_UCHAR, H5S_ALL, H5S_ALL,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("out hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read the raw dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in raw");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
offset = lseek (fd, 0, SEEK_SET);
assert (0==offset);
n = read (fd, the_data, size[0]*size[1]);
assert (n==size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read the hdf5 dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in hdf5");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read hyperslab */
assert (size[0]>20 && size[1]>20);
start[0] = start[1] = 10;
count[0] = count[1] = size[0]-20;
status = H5Sset_hyperslab (file_space, start, count, NULL);
assert (status>=0);
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in hdf5 partial");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in hdf5 partial",
&r_start, &r_stop, &t_start, &t_stop,
nread*count[0]*count[1]);
/* Close everything */
close (fd);
H5Dclose (dset);
H5Sclose (file_space);
H5Fclose (file);
return 0;
}
|
