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authorQuincey Koziol <koziol@hdfgroup.org>2017-01-29 07:27:08 (GMT)
committerQuincey Koziol <koziol@hdfgroup.org>2017-01-29 07:27:08 (GMT)
commita9808853d52b368f9ab7336a261c0555f22526f1 (patch)
tree602ac6b5c2fbea34b896cb44f23009c85ace34b4 /test/swmr_sparse_reader.c
parent3ad18072eba378ca1f598d33cc83587e8a76880f (diff)
parentb118b45d7d298923603a773c1b928715cc14d3bd (diff)
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Merge branch 'develop' of https://bitbucket.hdfgroup.org/scm/hdffv/hdf5 into develop_merge_cache_image_06
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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: swmr_sparse_reader.c
+ *
+ * Purpose: Reads data from a randomly selected subset of the datasets
+ * in the SWMR test file. Unlike the regular reader, these
+ * datasets will be shrinking.
+ *
+ * This program is intended to run concurrently with the
+ * swmr_sparse_writer program.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/***********/
+/* Headers */
+/***********/
+
+#include "h5test.h"
+#include "swmr_common.h"
+
+/****************/
+/* Local Macros */
+/****************/
+
+#define TIMEOUT 300
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+static hid_t symbol_tid = (-1);
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static int check_dataset(hid_t fid, unsigned verbose, const symbol_info_t *symbol,
+ symbol_t *record, hid_t rec_sid);
+static int read_records(const char *filename, unsigned verbose, unsigned long nrecords,
+ unsigned poll_time, unsigned reopen_count);
+static void usage(void);
+
+
+/*-------------------------------------------------------------------------
+ * Function: check_dataset
+ *
+ * Purpose: For a given dataset, checks to make sure that the stated
+ * and actual sizes are the same. If they are not, then
+ * we have an inconsistent dataset due to a SWMR error.
+ *
+ * Parameters: hid_t fid
+ * The SWMR test file's ID.
+ *
+ * unsigned verbose
+ * Whether verbose console output is desired.
+ *
+ * const symbol_info_t *symbol
+ * The dataset from which to read (the ID is in the struct).
+ * Must be pre-allocated.
+ *
+ * symbol_t *record
+ * Memory for the record. Must be pre-allocated.
+ *
+ * hid_t rec_sid
+ * The memory dataspace for access. It's always the same so
+ * there is no need to re-create it every time this function
+ * is called.
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+check_dataset(hid_t fid, unsigned verbose, const symbol_info_t *symbol, symbol_t *record,
+ hid_t rec_sid)
+{
+ hid_t dsid; /* Dataset ID */
+ hid_t file_sid; /* Dataset's space ID */
+ hsize_t start[2] = {0, 0}; /* Hyperslab selection values */
+ hsize_t count[2] = {1, 1}; /* Hyperslab selection values */
+
+ HDassert(fid >= 0);
+ HDassert(symbol);
+ HDassert(record);
+ HDassert(rec_sid >= 0);
+
+ /* Open dataset for symbol */
+ if((dsid = H5Dopen2(fid, symbol->name, H5P_DEFAULT)) < 0)
+ return -1;
+
+ /* Get the dataset's dataspace */
+ if((file_sid = H5Dget_space(dsid)) < 0)
+ return -1;
+
+ /* Choose the random record in the dataset (will be the same as chosen by
+ * the writer) */
+ start[1] = (hsize_t)HDrandom() % symbol->nrecords;
+ if(H5Sselect_hyperslab(file_sid, H5S_SELECT_SET, start, NULL, count, NULL) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Symbol = '%s', location = %lld\n", symbol->name, (long long)start);
+
+ /* Read record from dataset */
+ record->rec_id = (uint64_t)ULLONG_MAX;
+ if(H5Dread(dsid, symbol_tid, rec_sid, file_sid, H5P_DEFAULT, record) < 0)
+ return -1;
+
+ /* Verify record value */
+ if(record->rec_id != start[1]) {
+ HDfprintf(stderr, "*** ERROR ***\n");
+ HDfprintf(stderr, "Incorrect record value!\n");
+ HDfprintf(stderr, "Symbol = '%s', location = %lld, record->rec_id = %llu\n", symbol->name, (long long)start, (unsigned long long)record->rec_id);
+ return -1;
+ } /* end if */
+
+ /* Close the dataset's dataspace */
+ if(H5Sclose(file_sid) < 0)
+ return -1;
+
+ /* Close dataset for symbol */
+ if(H5Dclose(dsid) < 0)
+ return -1;
+
+ return 0;
+} /* end check_dataset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: read_records
+ *
+ * Purpose: For a given dataset, checks to make sure that the stated
+ * and actual sizes are the same. If they are not, then
+ * we have an inconsistent dataset due to a SWMR error.
+ *
+ * Parameters: const char *filename
+ * The SWMR test file's name.
+ *
+ * unsigned verbose
+ * Whether verbose console output is desired.
+ *
+ * unsigned long nrecords
+ * The total number of records to read.
+ *
+ * unsigned poll_time
+ * The amount of time to sleep (s).
+ *
+ * unsigned reopen_count
+ *
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+read_records(const char *filename, unsigned verbose, unsigned long nrecords,
+ unsigned poll_time, unsigned reopen_count)
+{
+ hid_t fid; /* File ID */
+ hid_t aid; /* Attribute ID */
+ time_t start_time; /* Starting time */
+ hid_t mem_sid; /* Memory dataspace ID */
+ symbol_t record; /* The record to add to the dataset */
+ unsigned seed; /* Seed for random number generator */
+ unsigned iter_to_reopen = reopen_count; /* # of iterations until reopen */
+ unsigned long u; /* Local index variable */
+ hid_t fapl;
+
+ HDassert(filename);
+ HDassert(poll_time != 0);
+
+ /* Create file access property list */
+ if((fapl = h5_fileaccess()) < 0)
+ return -1;
+
+ H5Pset_fclose_degree(fapl, H5F_CLOSE_SEMI);
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Opening file: %s\n", filename);
+
+ /* Open the file */
+ if((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0)
+ return -1;
+
+ /* Seed the random number generator with the attribute in the file */
+ if((aid = H5Aopen(fid, "seed", H5P_DEFAULT)) < 0)
+ return -1;
+ if(H5Aread(aid, H5T_NATIVE_UINT, &seed) < 0)
+ return -1;
+ if(H5Aclose(aid) < 0)
+ return -1;
+ HDsrandom(seed);
+
+ /* Reset the record */
+ /* (record's 'info' field might need to change for each record written, also) */
+ HDmemset(&record, 0, sizeof(record));
+
+ /* Create a dataspace for the record to read */
+ if((mem_sid = H5Screate(H5S_SCALAR)) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Reading records\n");
+
+ /* Get the starting time */
+ start_time = HDtime(NULL);
+
+ /* Read records */
+ for(u = 0; u < nrecords; u++) {
+ symbol_info_t *symbol = NULL; /* Symbol (dataset) */
+ htri_t attr_exists; /* Whether the sequence number attribute exists */
+ unsigned long file_u; /* Attribute sequence number (writer's "u") */
+
+ /* Get a random dataset, according to the symbol distribution */
+ symbol = choose_dataset();
+
+ /* Fill in "nrecords" field. Note that this depends on the writer
+ * using the same algorithm and "nrecords" */
+ symbol->nrecords = nrecords / 5;
+
+ /* Wait until we can read the dataset */
+ do {
+ /* Check if sequence attribute exists */
+ if((attr_exists = H5Aexists_by_name(fid, symbol->name, "seq", H5P_DEFAULT)) < 0)
+ return -1;
+
+ if(attr_exists) {
+ /* Read sequence number attribute */
+ if((aid = H5Aopen_by_name(fid, symbol->name, "seq", H5P_DEFAULT, H5P_DEFAULT)) < 0)
+ return -1;
+ if(H5Aread(aid, H5T_NATIVE_ULONG, &file_u) < 0)
+ return -1;
+ if(H5Aclose(aid) < 0)
+ return -1;
+
+ /* Check if sequence number is at least u - if so, this should
+ * guarantee that this record has been written */
+ if(file_u >= u)
+ break;
+ } /* end if */
+
+ /* Check for timeout */
+ if(HDtime(NULL) >= (time_t)(start_time + (time_t)TIMEOUT)) {
+ HDfprintf(stderr, "Reader timed out\n");
+ return -1;
+ } /* end if */
+
+ /* Pause */
+ HDsleep(poll_time);
+
+ /* Retrieve and print the collection of metadata read retries */
+ if(print_metadata_retries_info(fid) < 0)
+ HDfprintf(stderr, "Warning: could not obtain metadata retries info\n");
+
+ /* Reopen the file */
+ if(H5Fclose(fid) < 0)
+ return -1;
+ if((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0)
+ return -1;
+ iter_to_reopen = reopen_count;
+ } while(1);
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Checking dataset %lu\n", u);
+
+ /* Check dataset */
+ if(check_dataset(fid, verbose, symbol, &record, mem_sid) < 0)
+ return -1;
+ HDmemset(&record, 0, sizeof(record));
+
+ /* Check for reopen */
+ iter_to_reopen--;
+ if(iter_to_reopen == 0) {
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Reopening file: %s\n", filename);
+
+ /* Retrieve and print the collection of metadata read retries */
+ if(print_metadata_retries_info(fid) < 0)
+ HDfprintf(stderr, "Warning: could not obtain metadata retries info\n");
+
+ /* Reopen the file */
+ if(H5Fclose(fid) < 0)
+ return -1;
+ if((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0)
+ return -1;
+ iter_to_reopen = reopen_count;
+ } /* end if */
+ } /* end while */
+
+ /* Retrieve and print the collection of metadata read retries */
+ if(print_metadata_retries_info(fid) < 0)
+ HDfprintf(stderr, "Warning: could not obtain metadata retries info\n");
+
+ /* Close file */
+ if(H5Fclose(fid) < 0)
+ return -1;
+
+ /* Close the memory dataspace */
+ if(H5Sclose(mem_sid) < 0)
+ return -1;
+
+ return 0;
+} /* end read_records() */
+
+static void
+usage(void)
+{
+ printf("\n");
+ printf("Usage error!\n");
+ printf("\n");
+ printf("Usage: swmr_sparse_reader [-q] [-s <# of seconds to wait for writer>]\n");
+ printf(" [-n <# of reads between reopens>] <# of records>\n");
+ printf("\n");
+ printf("Defaults to verbose (no '-q' given), 1 second wait ('-s 1') and 1 read\n");
+ printf("between reopens ('-r 1')\n");
+ printf("\n");
+ printf("Note that the # of records *must* be the same as that supplied to\n");
+ printf("swmr_sparse_writer\n");
+ printf("\n");
+ HDexit(1);
+} /* end usage() */
+
+int main(int argc, const char *argv[])
+{
+ long nrecords = 0; /* # of records to read */
+ int poll_time = 1; /* # of seconds to sleep when waiting for writer */
+ int reopen_count = 1; /* # of reads between reopens */
+ unsigned verbose = 1; /* Whether to emit some informational messages */
+ unsigned u; /* Local index variables */
+
+ /* Parse command line options */
+ if(argc < 2)
+ usage();
+ if(argc > 1) {
+ u = 1;
+ while(u < (unsigned)argc) {
+ if(argv[u][0] == '-') {
+ switch(argv[u][1]) {
+ /* # of reads between reopens */
+ case 'n':
+ reopen_count = HDatoi(argv[u + 1]);
+ if(reopen_count < 0)
+ usage();
+ u += 2;
+ break;
+
+ /* Be quiet */
+ case 'q':
+ verbose = 0;
+ u++;
+ break;
+
+ /* # of seconds between polling */
+ case 's':
+ poll_time = HDatoi(argv[u + 1]);
+ if(poll_time < 0)
+ usage();
+ u += 2;
+ break;
+
+ default:
+ usage();
+ break;
+ } /* end switch */
+ } /* end if */
+ else {
+ /* Get the number of records to read */
+ nrecords = HDatol(argv[u]);
+ if(nrecords <= 0)
+ usage();
+
+ u++;
+ } /* end else */
+ } /* end while */
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose) {
+ HDfprintf(stderr, "Parameters:\n");
+ HDfprintf(stderr, "\t# of seconds between polling = %d\n", poll_time);
+ HDfprintf(stderr, "\t# of reads between reopens = %d\n", reopen_count);
+ HDfprintf(stderr, "\t# of records to read = %ld\n", nrecords);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Generating symbol names\n");
+
+ /* Generate dataset names */
+ if(generate_symbols() < 0) {
+ HDfprintf(stderr, "Error generating symbol names!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Create datatype for creating datasets */
+ if((symbol_tid = create_symbol_datatype()) < 0)
+ return -1;
+
+ /* Reading records from datasets */
+ if(read_records(FILENAME, verbose, (unsigned long) nrecords, (unsigned)poll_time, (unsigned)reopen_count) < 0) {
+ HDfprintf(stderr, "Error reading records from datasets!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Releasing symbols\n");
+
+ /* Clean up the symbols */
+ if(shutdown_symbols() < 0) {
+ HDfprintf(stderr, "Error releasing symbols!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing objects\n");
+
+ /* Close objects created */
+ if(H5Tclose(symbol_tid) < 0) {
+ HDfprintf(stderr, "Error closing symbol datatype!\n");
+ HDexit(1);
+ } /* end if */
+
+ return 0;
+}