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hdf5/test/swmr_sparse_reader.c
Dana Robinson d5ddf61803
Minor tweaks from VFD SWMR normalization (#1474)
2022-03-09 14:07:54 -06:00

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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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* 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 = %" PRIuMAX ",%" PRIuMAX "\n", symbol->name,
(uintmax_t)start[0], (uintmax_t)start[1]);
/* Read record from dataset */
record->rec_id = UINT64_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 = %" PRIuMAX ",%" PRIuMAX ", record->rec_id = %" PRIu64 "\n",
symbol->name, (uintmax_t)start[0], (uintmax_t)start[1], 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)
{
HDprintf("\n");
HDprintf("Usage error!\n");
HDprintf("\n");
HDprintf("Usage: swmr_sparse_reader [-q] [-s <# of seconds to wait for writer>]\n");
HDprintf(" [-n <# of reads between reopens>] <# of records>\n");
HDprintf("\n");
HDprintf("Defaults to verbose (no '-q' given), 1 second wait ('-s 1') and 1 read\n");
HDprintf("between reopens ('-r 1')\n");
HDprintf("\n");
HDprintf("Note that the # of records *must* be the same as that supplied to\n");
HDprintf("swmr_sparse_writer\n");
HDprintf("\n");
HDexit(EXIT_FAILURE);
} /* end usage() */
int
main(int argc, 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(EXIT_FAILURE);
} /* 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(EXIT_FAILURE);
} /* 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(EXIT_FAILURE);
} /* 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(EXIT_FAILURE);
} /* end if */
return 0;
}
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