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hdf5/testpar/t_subfiling_vfd.c
Scot Breitenfeld ec695cf34f
Renamed h5fuse.sh to h5fuse (#3834) 
* provide an alternative to mapfile for older bash
2023-11-07 09:50:03 -06:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* HDF5 Subfiling VFD tests
*
* NOTE: these tests currently assume that the default I/O concentrator
* selection strategy for the Subfiling VFD is to use 1 I/O
* concentrator per node. If that changes in the future, some of
* these tests will need updating.
*/
#include <mpi.h>
#include "testpar.h"
#include "H5srcdir.h"
#include "H5MMprivate.h"
#ifdef H5_HAVE_SUBFILING_VFD
#include "H5FDsubfiling.h"
#include "H5FDioc.h"
/* The smallest Subfiling stripe size used for testing */
#define SUBFILING_MIN_STRIPE_SIZE 128
/* Temporary test directory */
#define SUBFILING_CONFIG_FILE_DIR "subfiling_config_file_dir"
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
#define DEFAULT_DEFLATE_LEVEL 9
#define ARRAY_SIZE(a) sizeof(a) / sizeof(a[0])
#define CHECK_PASSED() \
do { \
int err_result = (nerrors > curr_nerrors); \
\
mpi_code_g = MPI_Allreduce(MPI_IN_PLACE, &err_result, 1, MPI_INT, MPI_MAX, comm_g); \
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Allreduce succeeded"); \
\
if (MAINPROCESS) { \
if (err_result == 0) \
PASSED(); \
else \
H5_FAILED(); \
} \
} while (0)
static MPI_Comm comm_g = MPI_COMM_WORLD;
static MPI_Info info_g = MPI_INFO_NULL;
static int mpi_rank;
static int mpi_size;
static int mpi_code_g;
static int num_nodes_g;
static int num_iocs_g;
static MPI_Comm node_local_comm = MPI_COMM_WORLD;
static int node_local_rank;
static int node_local_size;
static MPI_Comm ioc_comm = MPI_COMM_WORLD;
static int ioc_comm_rank;
static int ioc_comm_size;
static long long stripe_size_g = -1;
static long ioc_per_node_g = -1;
static int ioc_thread_pool_size_g = -1;
static char *config_dir = NULL;
int nerrors = 0;
int curr_nerrors = 0;
bool enable_compression = false;
/* Function pointer typedef for test functions */
typedef void (*test_func)(void);
/* Utility functions */
static hid_t create_subfiling_ioc_fapl(MPI_Comm comm, MPI_Info info, bool custom_config,
H5FD_subfiling_params_t *custom_cfg, int32_t thread_pool_size);
static hid_t create_dcpl_id(int rank, const hsize_t dims[], hid_t dxpl_id);
/* Test functions */
static void test_create_and_close(void);
static void test_ioc_only_fail(void);
static void test_config_file(void);
static void test_stripe_sizes(void);
static void test_selection_strategies(void);
static void test_read_different_stripe_size(void);
static void test_subfiling_precreate_rank_0(void);
static void test_subfiling_write_many_read_one(void);
static void test_subfiling_write_many_read_few(void);
static void test_subfiling_h5fuse(void);
static test_func tests[] = {
test_create_and_close,
test_ioc_only_fail,
test_config_file,
test_stripe_sizes,
test_selection_strategies,
test_read_different_stripe_size,
test_subfiling_precreate_rank_0,
test_subfiling_write_many_read_one,
test_subfiling_write_many_read_few,
test_subfiling_h5fuse,
};
/* ---------------------------------------------------------------------------
* Function: create_subfiling_ioc_fapl
*
* Purpose: Create and populate a subfiling FAPL ID.
*
* Return: Success: HID of the top-level (subfiling) FAPL, a non-negative
* value.
* Failure: H5I_INVALID_HID, a negative value.
* ---------------------------------------------------------------------------
*/
static hid_t
create_subfiling_ioc_fapl(MPI_Comm comm, MPI_Info info, bool custom_config,
H5FD_subfiling_params_t *custom_cfg, int32_t thread_pool_size)
{
H5FD_subfiling_config_t subfiling_conf;
H5FD_ioc_config_t ioc_conf;
hid_t ret_value = H5I_INVALID_HID;
assert(!custom_config || custom_cfg);
if ((ret_value = H5Pcreate(H5P_FILE_ACCESS)) < 0)
TEST_ERROR;
if (H5Pset_mpi_params(ret_value, comm, info) < 0)
TEST_ERROR;
if (!custom_config) {
if (H5Pset_fapl_subfiling(ret_value, NULL) < 0)
TEST_ERROR;
}
else {
/* Get defaults for Subfiling configuration */
if (H5Pget_fapl_subfiling(ret_value, &subfiling_conf) < 0)
TEST_ERROR;
/* Set custom configuration */
subfiling_conf.shared_cfg = *custom_cfg;
if (subfiling_conf.require_ioc) {
/* Get IOC VFD defaults */
if (H5Pget_fapl_ioc(ret_value, &ioc_conf) < 0)
TEST_ERROR;
/* Set custom configuration */
ioc_conf.thread_pool_size = thread_pool_size;
if (H5Pset_fapl_ioc(subfiling_conf.ioc_fapl_id, &ioc_conf) < 0)
TEST_ERROR;
}
else {
if (H5Pset_fapl_sec2(subfiling_conf.ioc_fapl_id) < 0)
TEST_ERROR;
}
if (H5Pset_fapl_subfiling(ret_value, &subfiling_conf) < 0)
TEST_ERROR;
}
return ret_value;
error:
if ((H5I_INVALID_HID != ret_value) && (H5Pclose(ret_value) < 0)) {
H5_FAILED();
AT();
}
return H5I_INVALID_HID;
}
/* ---------------------------------------------------------------------------
* Function: create_dcpl_id
*
* Purpose: Creates dataset creation property list identifier with
* chunking and compression, and enforces the
* required collective IO.
*
* Return: Success: HID Dataset creation property list identifier,
* a non-negative value.
* Failure: H5I_INVALID_HID, a negative value.
* ---------------------------------------------------------------------------
*/
static hid_t
create_dcpl_id(int rank, const hsize_t dset_dims[], hid_t dxpl_id)
{
hsize_t chunk_dims[1];
hid_t ret_value = H5I_INVALID_HID;
if ((ret_value = H5Pcreate(H5P_DATASET_CREATE)) < 0)
TEST_ERROR;
if (enable_compression) {
if (H5Pset_dxpl_mpio(dxpl_id, H5FD_MPIO_COLLECTIVE) < 0)
TEST_ERROR;
chunk_dims[0] = dset_dims[0] / 2;
if (H5Pset_chunk(ret_value, rank, chunk_dims) < 0)
TEST_ERROR;
if (H5Pset_deflate(ret_value, DEFAULT_DEFLATE_LEVEL) < 0)
TEST_ERROR;
}
return ret_value;
error:
if ((H5I_INVALID_HID != ret_value) && (H5Pclose(ret_value) < 0)) {
H5_FAILED();
AT();
}
return H5I_INVALID_HID;
}
/*
* A simple test that creates and closes a file with the
* subfiling VFD
*/
#define SUBF_FILENAME "test_subfiling_basic_create.h5"
static void
test_create_and_close(void)
{
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
curr_nerrors = nerrors;
if (MAINPROCESS)
TESTING_2("file creation and immediate close");
/* Get a default Subfiling FAPL */
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
/*
* A simple test that ensures file creation fails when
* attempting to use the IOC VFD by itself, without it
* being stacked under the Subfiling VFD. This is
* currently unsupported.
*/
#define SUBF_FILENAME "test_subfiling_only_ioc_fail.h5"
static void
test_ioc_only_fail(void)
{
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
curr_nerrors = nerrors;
if (MAINPROCESS)
TESTING_2("invalid use of IOC VFD by itself");
/* Setup a FAPL using only the IOC VFD */
fapl_id = H5Pcreate(H5P_FILE_ACCESS);
VRFY((fapl_id >= 0), "H5Pcreate succeeded");
VRFY((H5Pset_mpi_params(fapl_id, comm_g, info_g) >= 0), "H5Pset_mpi_params succeeded");
VRFY((H5Pset_fapl_ioc(fapl_id, NULL) >= 0), "H5Pset_fapl_ioc succeeded");
H5E_BEGIN_TRY
{
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
}
H5E_END_TRY
VRFY((file_id < 0), "H5Fcreate failed successfully");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
/*
* Test to check that Subfiling configuration file matches
* what is expected for a given configuration
*/
#define SUBF_FILENAME "test_subfiling_config_file.h5"
static void
test_config_file(void)
{
H5FD_subfiling_params_t cfg;
int64_t stripe_size;
int64_t read_stripe_size;
FILE *config_file;
char *config_filename = NULL;
char *config_buf = NULL;
long config_file_len;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
int read_stripe_count;
int read_aggr_count;
curr_nerrors = nerrors;
if (MAINPROCESS)
TESTING_2("subfiling configuration file format");
/*
* Choose a random Subfiling stripe size between
* the smallest allowed value and 32MiB
*/
if (mpi_rank == 0) {
stripe_size = (rand() % (H5FD_SUBFILING_DEFAULT_STRIPE_SIZE - SUBFILING_MIN_STRIPE_SIZE + 1)) +
SUBFILING_MIN_STRIPE_SIZE;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&stripe_size, 1, MPI_INT64_T, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
cfg.ioc_selection = SELECT_IOC_ONE_PER_NODE;
cfg.stripe_size = (stripe_size_g > 0) ? stripe_size_g : stripe_size;
cfg.stripe_count = num_iocs_g > 1 ? (num_iocs_g / 2) : 1;
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, true, &cfg, H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
if (MAINPROCESS) {
h5_stat_t file_info;
char *resolved_path;
char *subfile_dir;
char *subfile_name;
char *tmp_buf;
char *substr;
char scan_format[256];
int num_digits;
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
config_filename = malloc(PATH_MAX);
VRFY(config_filename, "malloc succeeded");
snprintf(config_filename, PATH_MAX, "%s/" H5FD_SUBFILING_CONFIG_FILENAME_TEMPLATE, config_dir,
SUBF_FILENAME, (uint64_t)file_info.st_ino);
config_file = fopen(config_filename, "r");
VRFY(config_file, "fopen succeeded");
free(config_filename);
VRFY((HDfseek(config_file, 0, SEEK_END) >= 0), "HDfseek succeeded");
config_file_len = HDftell(config_file);
VRFY((config_file_len > 0), "HDftell succeeded");
VRFY((HDfseek(config_file, 0, SEEK_SET) >= 0), "HDfseek succeeded");
config_buf = malloc((size_t)config_file_len + 1);
VRFY(config_buf, "malloc succeeded");
VRFY((fread(config_buf, (size_t)config_file_len, 1, config_file) == 1), "fread succeeded");
config_buf[config_file_len] = '\0';
/* Check the stripe_size field in the configuration file */
substr = strstr(config_buf, "stripe_size");
VRFY(substr, "strstr succeeded");
VRFY((sscanf(substr, "stripe_size=%" PRId64, &read_stripe_size) == 1), "sscanf succeeded");
VRFY((read_stripe_size == cfg.stripe_size), "Stripe size comparison succeeded");
/* Check the aggregator_count field in the configuration file */
substr = strstr(config_buf, "aggregator_count");
VRFY(substr, "strstr succeeded");
VRFY((sscanf(substr, "aggregator_count=%d", &read_aggr_count) == 1), "sscanf succeeded");
if (cfg.stripe_count < num_iocs_g)
VRFY((read_aggr_count == cfg.stripe_count), "Aggregator count comparison succeeded");
else
VRFY((read_aggr_count == num_iocs_g), "Aggregator count comparison succeeded");
/* Check the subfile_count field in the configuration file */
substr = strstr(config_buf, "subfile_count");
VRFY(substr, "strstr succeeded");
VRFY((sscanf(substr, "subfile_count=%d", &read_stripe_count) == 1), "sscanf succeeded");
VRFY((read_stripe_count == cfg.stripe_count), "Stripe count comparison succeeded");
/* Check the hdf5_file and subfile_dir fields in the configuration file */
resolved_path = HDrealpath(SUBF_FILENAME, NULL);
VRFY(resolved_path, "HDrealpath succeeded");
VRFY((H5_dirname(resolved_path, &subfile_dir) >= 0), "H5_dirname succeeded");
tmp_buf = malloc(PATH_MAX);
VRFY(tmp_buf, "malloc succeeded");
substr = strstr(config_buf, "hdf5_file");
VRFY(substr, "strstr succeeded");
H5_GCC_CLANG_DIAG_OFF("format-nonliteral")
snprintf(scan_format, sizeof(scan_format), "hdf5_file=%%%zus", (size_t)(PATH_MAX - 1));
VRFY((sscanf(substr, scan_format, tmp_buf) == 1), "sscanf succeeded");
H5_GCC_CLANG_DIAG_ON("format-nonliteral")
VRFY((strcmp(tmp_buf, resolved_path) == 0), "strcmp succeeded");
substr = strstr(config_buf, "subfile_dir");
VRFY(substr, "strstr succeeded");
H5_GCC_CLANG_DIAG_OFF("format-nonliteral")
snprintf(scan_format, sizeof(scan_format), "subfile_dir=%%%zus", (size_t)(PATH_MAX - 1));
VRFY((sscanf(substr, scan_format, tmp_buf) == 1), "sscanf succeeded");
H5_GCC_CLANG_DIAG_ON("format-nonliteral")
VRFY((strcmp(tmp_buf, subfile_dir) == 0), "strcmp succeeded");
free(tmp_buf);
H5MM_free(subfile_dir);
free(resolved_path);
subfile_name = malloc(PATH_MAX);
VRFY(subfile_name, "malloc succeeded");
/* Verify the name of each subfile is in the configuration file */
num_digits = (int)(log10(cfg.stripe_count) + 1);
for (size_t i = 0; i < (size_t)cfg.stripe_count; i++) {
snprintf(subfile_name, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, (int)i + 1, cfg.stripe_count);
substr = strstr(config_buf, subfile_name);
VRFY(substr, "strstr succeeded");
}
/* Verify that there aren't too many subfiles */
snprintf(subfile_name, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, (int)cfg.stripe_count + 1, cfg.stripe_count);
substr = strstr(config_buf, subfile_name);
VRFY(substr == NULL, "strstr correctly failed");
free(subfile_name);
free(config_buf);
VRFY((fclose(config_file) >= 0), "fclose on configuration file succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
/*
* Test a few different Subfiling stripe sizes with a fixed
* stripe count
*/
/* TODO: Test collective I/O as well when support is implemented */
#define SUBF_FILENAME "test_subfiling_stripe_sizes.h5"
#define SUBF_NITER 10
static void
test_stripe_sizes(void)
{
H5FD_t *file_ptr = NULL;
void *write_buf = NULL;
char *tmp_filename = NULL;
hid_t dxpl_id = H5I_INVALID_HID;
int num_subfiles;
int num_digits;
hid_t fapl_id = H5I_INVALID_HID;
curr_nerrors = nerrors;
if (MAINPROCESS)
TESTING_2("random subfiling stripe sizes");
tmp_filename = malloc(PATH_MAX);
VRFY(tmp_filename, "malloc succeeded");
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
for (size_t i = 0; i < SUBF_NITER; i++) {
H5FD_subfiling_params_t cfg;
h5_stat_size_t file_size;
const void *c_write_buf;
h5_stat_t file_info;
int64_t file_size64;
int64_t stripe_size;
haddr_t file_end_addr;
haddr_t write_addr;
size_t nbytes;
herr_t write_status;
hid_t file_id;
/*
* Choose a random Subfiling stripe size between
* the smallest allowed value and the default value
*/
if (mpi_rank == 0) {
stripe_size = (rand() % (H5FD_SUBFILING_DEFAULT_STRIPE_SIZE - SUBFILING_MIN_STRIPE_SIZE + 1)) +
SUBFILING_MIN_STRIPE_SIZE;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&stripe_size, 1, MPI_INT64_T, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
cfg.ioc_selection = SELECT_IOC_ONE_PER_NODE;
cfg.stripe_size = (stripe_size_g > 0) ? stripe_size_g : stripe_size;
cfg.stripe_count = 1;
/* First, try I/O with a single rank */
if (MAINPROCESS) {
FILE *subfile_ptr;
num_subfiles = 1;
num_digits = (int)(log10(num_subfiles) + 1);
nbytes = (size_t)(cfg.stripe_size * num_subfiles);
write_buf = malloc(nbytes);
VRFY(write_buf, "malloc succeeded");
memset(write_buf, 255, nbytes);
c_write_buf = write_buf;
fapl_id = create_subfiling_ioc_fapl(MPI_COMM_SELF, MPI_INFO_NULL, true, &cfg,
H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
/* Create and close file with H5Fcreate to setup superblock */
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Fclose(file_id) >= 0), "H5Fclose succeeded");
/* Re-open file through H5FDopen for direct writes */
file_ptr = H5FDopen(SUBF_FILENAME, H5F_ACC_RDWR, fapl_id, HADDR_UNDEF);
VRFY(file_ptr, "H5FDopen succeeded");
/*
* Get the current file size to see where we can safely
* write to in the file without overwriting the superblock
*/
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
file_size = (h5_stat_size_t)file_info.st_size;
H5_CHECK_OVERFLOW(file_size, h5_stat_size_t, haddr_t);
file_end_addr = (haddr_t)file_size;
/* Set independent I/O on DXPL */
VRFY((H5Pset_dxpl_mpio(dxpl_id, H5FD_MPIO_INDEPENDENT) >= 0), "H5Pset_dxpl_mpio succeeded");
/* Set EOA for following write call */
VRFY((H5FDset_eoa(file_ptr, H5FD_MEM_DEFAULT, file_end_addr + nbytes) >= 0),
"H5FDset_eoa succeeded");
/*
* Write "number of IOCs" X "stripe size" bytes to the file
* and ensure that we have "number of IOCs" subfiles, each
* with a size of at least "stripe size" bytes. The first
* (few) subfile(s) may be a bit larger due to file metadata.
*/
write_addr = file_end_addr;
write_status = H5FDwrite(file_ptr, H5FD_MEM_DRAW, dxpl_id, write_addr, nbytes, c_write_buf);
VRFY((write_status >= 0), "H5FDwrite succeeded");
file_end_addr += nbytes;
VRFY((H5FDtruncate(file_ptr, dxpl_id, 0) >= 0), "H5FDtruncate succeeded");
for (int j = 0; j < num_subfiles; j++) {
h5_stat_size_t subfile_size;
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
subfile_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((subfile_size >= cfg.stripe_size), "File size verification succeeded");
}
/* Verify that there aren't too many subfiles */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, num_subfiles + 1, num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
/* Set EOA for following write call */
VRFY((H5FDset_eoa(file_ptr, H5FD_MEM_DEFAULT, file_end_addr + nbytes) >= 0),
"H5FDset_eoa succeeded");
/*
* Write another round of "number of IOCs" X "stripe size"
* bytes to the file using vector I/O and ensure we have
* "number of IOCs" subfiles, each with a size of at least
* 2 * "stripe size" bytes. The first (few) subfile(s) may
* be a bit larger due to file metadata.
*/
H5FD_mem_t write_type = H5FD_MEM_DRAW;
write_addr = file_end_addr;
write_status =
H5FDwrite_vector(file_ptr, dxpl_id, 1, &write_type, &write_addr, &nbytes, &c_write_buf);
VRFY((write_status >= 0), "H5FDwrite_vector succeeded");
VRFY((H5FDtruncate(file_ptr, dxpl_id, 0) >= 0), "H5FDtruncate succeeded");
for (int j = 0; j < num_subfiles; j++) {
h5_stat_size_t subfile_size;
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
subfile_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((subfile_size >= 2 * cfg.stripe_size), "File size verification succeeded");
}
/* Verify that there aren't too many subfiles */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, num_subfiles + 1, num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
free(write_buf);
write_buf = NULL;
VRFY((H5FDclose(file_ptr) >= 0), "H5FDclose succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
/* Next, try I/O with all ranks */
cfg.stripe_count = num_iocs_g;
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, true, &cfg, H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
/* Create and close file with H5Fcreate to setup superblock */
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Fclose(file_id) >= 0), "H5Fclose succeeded");
/* Re-open file through H5FDopen for direct writes */
file_ptr = H5FDopen(SUBF_FILENAME, H5F_ACC_RDWR, fapl_id, HADDR_UNDEF);
VRFY(file_ptr, "H5FDopen succeeded");
num_subfiles = num_iocs_g;
num_digits = (int)(log10(num_subfiles) + 1);
nbytes = (size_t)(cfg.stripe_size * num_subfiles);
write_buf = malloc(nbytes);
VRFY(write_buf, "malloc succeeded");
memset(write_buf, 255, nbytes);
c_write_buf = write_buf;
/*
* Get the current file size to see where we can safely
* write to in the file without overwriting the superblock
*/
if (MAINPROCESS) {
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
file_size = (h5_stat_size_t)file_info.st_size;
H5_CHECK_OVERFLOW(file_size, h5_stat_size_t, int64_t);
file_size64 = (int64_t)file_size;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&file_size64, 1, MPI_INT64_T, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
H5_CHECK_OVERFLOW(file_size64, int64_t, haddr_t);
file_end_addr = (haddr_t)file_size64;
/* Set independent I/O on DXPL */
VRFY((H5Pset_dxpl_mpio(dxpl_id, H5FD_MPIO_INDEPENDENT) >= 0), "H5Pset_dxpl_mpio succeeded");
/* Set EOA for following write call */
VRFY((H5FDset_eoa(file_ptr, H5FD_MEM_DEFAULT, file_end_addr + ((size_t)mpi_size * nbytes)) >= 0),
"H5FDset_eoa succeeded");
/*
* Write "number of IOCs" X "stripe size" bytes to the file
* from each rank and ensure that we have "number of IOCs"
* subfiles, each with a size of at least "mpi size" * "stripe size"
* bytes. The first (few) subfile(s) may be a bit larger
* due to file metadata.
*/
write_addr = file_end_addr + ((size_t)mpi_rank * nbytes);
write_status = H5FDwrite(file_ptr, H5FD_MEM_DRAW, dxpl_id, write_addr, nbytes, c_write_buf);
VRFY((write_status >= 0), "H5FDwrite succeeded");
file_end_addr += ((size_t)mpi_size * nbytes);
VRFY((H5FDtruncate(file_ptr, dxpl_id, 0) >= 0), "H5FDtruncate succeeded");
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
if (MAINPROCESS) {
FILE *subfile_ptr;
for (int j = 0; j < num_subfiles; j++) {
h5_stat_size_t subfile_size;
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
subfile_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((subfile_size >= (mpi_size * cfg.stripe_size)), "File size verification succeeded");
}
/* Verify that there aren't too many subfiles */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, num_subfiles + 1, num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
/* Set EOA for following write call */
VRFY((H5FDset_eoa(file_ptr, H5FD_MEM_DEFAULT, file_end_addr + ((size_t)mpi_size * nbytes)) >= 0),
"H5FDset_eoa succeeded");
/*
* Write another round of "number of IOCs" X "stripe size"
* bytes to the file from each rank using vector I/O and
* ensure we have "number of IOCs" subfiles, each with a
* size of at least 2 * "mpi size" * "stripe size" bytes.
* The first (few) subfile(s) may be a bit larger due to
* file metadata.
*/
H5FD_mem_t write_type = H5FD_MEM_DRAW;
write_addr = file_end_addr + ((size_t)mpi_rank * nbytes);
write_status =
H5FDwrite_vector(file_ptr, dxpl_id, 1, &write_type, &write_addr, &nbytes, &c_write_buf);
VRFY((write_status >= 0), "H5FDwrite_vector succeeded");
VRFY((H5FDtruncate(file_ptr, dxpl_id, 0) >= 0), "H5FDtruncate succeeded");
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
if (MAINPROCESS) {
FILE *subfile_ptr;
for (int j = 0; j < num_subfiles; j++) {
h5_stat_size_t subfile_size;
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
subfile_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((subfile_size >= (2 * mpi_size * cfg.stripe_size)), "File size verification succeeded");
}
/* Verify that there aren't too many subfiles */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, num_subfiles + 1, num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
}
VRFY((H5FDclose(file_ptr) >= 0), "H5FDclose succeeded");
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
free(write_buf);
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
}
free(tmp_filename);
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef SUBF_NITER
/*
* Test the different I/O Concentator selection strategies
* for the Subfiling VFD
*/
#define SUBF_FILENAME "test_subfiling_selection_strategies.h5"
#define NUM_RANKS_CHOICES 2
#define NUM_CRITERIA_FORMATS 2
static void
test_selection_strategies(void)
{
H5FD_subfiling_params_t cfg;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
char *tmp_filename = NULL;
curr_nerrors = nerrors;
if (MAINPROCESS)
TESTING_2("I/O concentrator selection strategies");
tmp_filename = malloc(PATH_MAX);
VRFY(tmp_filename, "malloc succeeded");
for (H5FD_subfiling_ioc_select_t strategy = 0; strategy < ioc_selection_options; strategy++) {
/* Skip 1 IOC per node strategy since we assume it's
* the default strategy tested in this file. Skip
* "with config" strategy since it isn't supported.
*/
if (strategy == SELECT_IOC_ONE_PER_NODE || strategy == SELECT_IOC_WITH_CONFIG)
continue;
/* Test with 1 MPI rank and then all MPI ranks */
for (size_t num_ranks_choice = 0; num_ranks_choice < NUM_RANKS_CHOICES; num_ranks_choice++) {
int num_active_ranks = mpi_size;
if (num_ranks_choice == 0)
num_active_ranks = 1;
/* Test with a selection strategy criteria string
* in the 'integer:[integer|string]' form and in
* the form of just a single value.
*/
for (size_t criteria_format_choice = 0; criteria_format_choice < NUM_CRITERIA_FORMATS;
criteria_format_choice++) {
MPI_Comm file_comm = comm_g;
char criteria_buf[256];
char sel_criteria[128]; /* Use char buffer for criteria as we may support
the "with config" strategy in the future */
int expected_num_subfiles = -1;
cfg.ioc_selection = strategy;
cfg.stripe_size = H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
cfg.stripe_count = H5FD_SUBFILING_DEFAULT_STRIPE_COUNT;
switch (strategy) {
case SELECT_IOC_EVERY_NTH_RANK: {
int stride;
/* Try to select a reasonable stride value */
if (num_active_ranks <= 2)
stride = 1;
else if (num_active_ranks <= 8)
stride = 2;
else if (num_active_ranks <= 32)
stride = 4;
else if (num_active_ranks <= 128)
stride = 8;
else
stride = 16;
snprintf(sel_criteria, 128, "%d", stride);
expected_num_subfiles = ((num_active_ranks - 1) / stride) + 1;
break;
}
case SELECT_IOC_TOTAL: {
int n_iocs;
/* Try to select a reasonable number of IOCs */
if (num_active_ranks <= 2)
n_iocs = 1;
else if (num_active_ranks <= 8)
n_iocs = 2;
else if (num_active_ranks <= 32)
n_iocs = 4;
else if (num_active_ranks <= 128)
n_iocs = 8;
else
n_iocs = 16;
snprintf(sel_criteria, 128, "%d", n_iocs);
expected_num_subfiles = n_iocs;
break;
}
case SELECT_IOC_ONE_PER_NODE:
case SELECT_IOC_WITH_CONFIG:
case ioc_selection_options:
default:
printf("invalid IOC selection strategy\n");
MPI_Abort(comm_g, -1);
}
if (criteria_format_choice == 0) {
snprintf(criteria_buf, 256, "%d:%s", strategy, sel_criteria);
}
else if (criteria_format_choice == 1) {
snprintf(criteria_buf, 256, "%s", sel_criteria);
}
VRFY(HDsetenv(H5FD_SUBFILING_IOC_SELECTION_CRITERIA, criteria_buf, 1) >= 0,
"HDsetenv succeeded");
assert(num_active_ranks == mpi_size || num_active_ranks == 1);
if ((num_active_ranks == mpi_size) || (mpi_rank == 0)) {
h5_stat_t file_info;
FILE *subfile_ptr;
int num_digits;
if (num_active_ranks < mpi_size)
file_comm = MPI_COMM_SELF;
fapl_id = create_subfiling_ioc_fapl(file_comm, info_g, true, &cfg,
H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
/*
* Get the file inode value so we can construct the subfile names
*/
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
num_digits = (int)(log10(expected_num_subfiles) + 1);
/* Ensure all the subfiles are present */
for (int i = 0; i < expected_num_subfiles; i++) {
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, i + 1, expected_num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
}
/* Ensure no extra subfiles are present */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, expected_num_subfiles + 1,
expected_num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
mpi_code_g = MPI_Barrier(file_comm);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
VRFY(HDunsetenv(H5FD_SUBFILING_IOC_SELECTION_CRITERIA) >= 0, "HDunsetenv succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
}
}
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
free(tmp_filename);
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef NUM_RANKS_CHOICES
#undef NUM_CRITERIA_FORMATS
/*
* Test that opening a file with a different stripe
* size/count than was used when creating the file
* results in the original stripe size/count being
* used. As there is currently no API to check the
* exact values used, we rely on the assumption that
* using a different stripe size/count would result
* in data verification failures.
*/
#define SUBF_FILENAME "test_subfiling_read_different_stripe_sizes.h5"
#define SUBF_HDF5_TYPE H5T_NATIVE_INT
#define SUBF_C_TYPE int
static void
test_read_different_stripe_size(void)
{
H5FD_subfiling_params_t cfg;
hsize_t start[1];
hsize_t count[1];
hsize_t dset_dims[1];
size_t target_size;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
hid_t dset_id = H5I_INVALID_HID;
hid_t dxpl_id = H5I_INVALID_HID;
hid_t dcpl_id = H5I_INVALID_HID;
hid_t fspace_id = H5I_INVALID_HID;
char *tmp_filename = NULL;
void *buf = NULL;
curr_nerrors = nerrors;
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
if (MAINPROCESS)
TESTING_2("file re-opening with different stripe size");
tmp_filename = malloc(PATH_MAX);
VRFY(tmp_filename, "malloc succeeded");
/* Use a 1MiB stripe size and a subfile for each IOC */
cfg.ioc_selection = SELECT_IOC_ONE_PER_NODE;
cfg.stripe_size = (stripe_size_g > 0) ? stripe_size_g : 1048576;
cfg.stripe_count = num_iocs_g;
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, true, &cfg, H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
target_size = (size_t)cfg.stripe_size;
/* Nudge stripe size to be multiple of C type size */
if ((target_size % sizeof(SUBF_C_TYPE)) != 0)
target_size += sizeof(SUBF_C_TYPE) - (target_size % sizeof(SUBF_C_TYPE));
target_size *= (size_t)mpi_size;
VRFY(((target_size % sizeof(SUBF_C_TYPE)) == 0), "target size check succeeded");
dset_dims[0] = (hsize_t)(target_size / sizeof(SUBF_C_TYPE));
fspace_id = H5Screate_simple(1, dset_dims, NULL);
VRFY((fspace_id >= 0), "H5Screate_simple succeeded");
dcpl_id = create_dcpl_id(1, dset_dims, dxpl_id);
VRFY((dcpl_id >= 0), "DCPL creation succeeded");
dset_id = H5Dcreate2(file_id, "DSET", SUBF_HDF5_TYPE, fspace_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset creation succeeded");
/* Select hyperslab */
count[0] = dset_dims[0] / (hsize_t)mpi_size;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = malloc(count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "malloc succeeded");
for (size_t i = 0; i < count[0]; i++)
((SUBF_C_TYPE *)buf)[i] = (SUBF_C_TYPE)((size_t)mpi_rank + i);
VRFY((H5Dwrite(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset write succeeded");
free(buf);
buf = NULL;
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Pclose(dcpl_id) >= 0), "DCPL close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
/* Ensure all the subfiles are present */
if (MAINPROCESS) {
h5_stat_t file_info;
FILE *subfile_ptr;
int num_subfiles = cfg.stripe_count;
int num_digits = (int)(log10(num_subfiles) + 1);
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
for (int j = 0; j < num_subfiles; j++) {
h5_stat_size_t subfile_size;
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
if (!enable_compression) {
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
subfile_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((subfile_size >= cfg.stripe_size), "File size verification succeeded");
}
}
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
/* Add a bit to the stripe size and specify a few more subfiles */
cfg.stripe_size += (cfg.stripe_size / 2);
cfg.stripe_count *= 2;
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, true, &cfg, H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fopen(SUBF_FILENAME, H5F_ACC_RDONLY, fapl_id);
VRFY((file_id >= 0), "H5Fopen succeeded");
dset_id = H5Dopen2(file_id, "DSET", H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset open succeeded");
fspace_id = H5Dget_space(dset_id);
VRFY((fspace_id >= 0), "Dataspace retrieval succeeded");
/* Select hyperslab */
count[0] = dset_dims[0] / (hsize_t)mpi_size;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = calloc(1, count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "calloc succeeded");
VRFY((H5Dread(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset read succeeded");
for (size_t i = 0; i < count[0]; i++) {
SUBF_C_TYPE buf_value = ((SUBF_C_TYPE *)buf)[i];
VRFY((buf_value == (SUBF_C_TYPE)((size_t)mpi_rank + i)), "data verification succeeded");
}
free(buf);
buf = NULL;
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
/* Ensure only the original subfiles are present */
if (MAINPROCESS) {
h5_stat_t file_info;
FILE *subfile_ptr;
int num_subfiles = cfg.stripe_count;
int num_digits = (int)(log10(num_subfiles / 2) + 1);
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
for (int j = 0; j < num_subfiles; j++) {
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, j + 1, num_subfiles / 2);
if (j < (num_subfiles / 2)) {
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
}
else {
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
}
}
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
free(tmp_filename);
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef SUBF_HDF5_TYPE
#undef SUBF_C_TYPE
/*
* Test that everything works correctly when a file is
* pre-created on rank 0 with a specified target number
* of subfiles and then read back on all ranks.
*/
#define SUBF_FILENAME "test_subfiling_precreate_rank_0.h5"
#define SUBF_HDF5_TYPE H5T_NATIVE_INT
#define SUBF_C_TYPE int
static void
test_subfiling_precreate_rank_0(void)
{
hsize_t start[1];
hsize_t count[1];
hsize_t dset_dims[1];
size_t target_size;
size_t n_elements_per_rank;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
hid_t dset_id = H5I_INVALID_HID;
hid_t dxpl_id = H5I_INVALID_HID;
hid_t fspace_id = H5I_INVALID_HID;
void *buf = NULL;
curr_nerrors = nerrors;
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
if (MAINPROCESS)
TESTING_2("file pre-creation on rank 0");
/* Calculate target size for dataset to stripe it across available IOCs */
target_size = (stripe_size_g > 0) ? (size_t)stripe_size_g : H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
/* Nudge stripe size to be multiple of C type size */
if ((target_size % sizeof(SUBF_C_TYPE)) != 0)
target_size += sizeof(SUBF_C_TYPE) - (target_size % sizeof(SUBF_C_TYPE));
target_size *= (size_t)mpi_size;
VRFY(((target_size % sizeof(SUBF_C_TYPE)) == 0), "target size check succeeded");
if (stripe_size_g > 0) {
VRFY((target_size >= (size_t)stripe_size_g), "target size check succeeded");
}
else {
VRFY((target_size >= H5FD_SUBFILING_DEFAULT_STRIPE_SIZE), "target size check succeeded");
}
dset_dims[0] = (hsize_t)(target_size / sizeof(SUBF_C_TYPE));
n_elements_per_rank = (dset_dims[0] / (size_t)mpi_size);
/* Create and populate file on rank 0 only */
if (MAINPROCESS) {
H5FD_subfiling_params_t cfg;
h5_stat_size_t file_size;
h5_stat_t file_info;
FILE *subfile_ptr;
char *tmp_filename = NULL;
int num_subfiles;
int num_digits;
/* Create a file consisting of 1 subfile per application I/O concentrator */
cfg.ioc_selection = SELECT_IOC_ONE_PER_NODE;
cfg.stripe_size = (stripe_size_g > 0) ? stripe_size_g : H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
cfg.stripe_count = num_iocs_g;
fapl_id = create_subfiling_ioc_fapl(MPI_COMM_SELF, MPI_INFO_NULL, true, &cfg,
H5FD_IOC_DEFAULT_THREAD_POOL_SIZE);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
fspace_id = H5Screate_simple(1, dset_dims, NULL);
VRFY((fspace_id >= 0), "H5Screate_simple succeeded");
dset_id =
H5Dcreate2(file_id, "DSET", SUBF_HDF5_TYPE, fspace_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset creation succeeded");
buf = malloc(dset_dims[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "malloc succeeded");
for (size_t i = 0; i < dset_dims[0]; i++)
((SUBF_C_TYPE *)buf)[i] = (SUBF_C_TYPE)((i / n_elements_per_rank) + (i % n_elements_per_rank));
VRFY((H5Dwrite(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset write succeeded");
free(buf);
buf = NULL;
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
VRFY((H5Fclose(file_id) >= 0), "H5Fclose succeeded");
/*
* Ensure that all the subfiles are present
*/
num_subfiles = cfg.stripe_count;
num_digits = (int)(log10(num_subfiles) + 1);
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
tmp_filename = malloc(PATH_MAX);
VRFY(tmp_filename, "malloc succeeded");
for (int i = 0; i < num_subfiles; i++) {
h5_stat_t subfile_info;
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, i + 1, num_subfiles);
/* Ensure file exists */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr, "fopen on subfile succeeded");
VRFY((fclose(subfile_ptr) >= 0), "fclose on subfile succeeded");
/* Check file size */
if (!enable_compression) {
VRFY((HDstat(tmp_filename, &subfile_info) >= 0), "HDstat succeeded");
file_size = (h5_stat_size_t)subfile_info.st_size;
VRFY((file_size >= cfg.stripe_size), "File size verification succeeded");
}
}
/* Verify that there aren't too many subfiles */
snprintf(tmp_filename, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME,
(uint64_t)file_info.st_ino, num_digits, num_subfiles + 1, num_subfiles);
/* Ensure file doesn't exist */
subfile_ptr = fopen(tmp_filename, "r");
VRFY(subfile_ptr == NULL, "fopen on subfile correctly failed");
free(tmp_filename);
tmp_filename = NULL;
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
/* Open the file on all ranks */
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fopen(SUBF_FILENAME, H5F_ACC_RDONLY, fapl_id);
VRFY((file_id >= 0), "H5Fopen succeeded");
dset_id = H5Dopen2(file_id, "DSET", H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset open succeeded");
fspace_id = H5Dget_space(dset_id);
VRFY((fspace_id >= 0), "Dataset dataspace retrieval succeeded");
/* Select hyperslab */
count[0] = n_elements_per_rank;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = calloc(1, count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "calloc succeeded");
VRFY((H5Dread(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset read succeeded");
for (size_t i = 0; i < n_elements_per_rank; i++) {
SUBF_C_TYPE buf_value = ((SUBF_C_TYPE *)buf)[i];
VRFY((buf_value == (SUBF_C_TYPE)((size_t)mpi_rank + i)), "data verification succeeded");
}
free(buf);
buf = NULL;
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Fclose(file_id) >= 0), "H5Fclose succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef SUBF_HDF5_TYPE
#undef SUBF_C_TYPE
/*
* Test to check that an HDF5 file created with the
* Subfiling VFD can be read back with a single MPI
* rank
*/
#define SUBF_FILENAME "test_subfiling_write_many_read_one.h5"
#define SUBF_HDF5_TYPE H5T_NATIVE_INT
#define SUBF_C_TYPE int
static void
test_subfiling_write_many_read_one(void)
{
hsize_t start[1];
hsize_t count[1];
hsize_t dset_dims[1];
size_t target_size;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
hid_t dset_id = H5I_INVALID_HID;
hid_t dxpl_id = H5I_INVALID_HID;
hid_t dcpl_id = H5I_INVALID_HID;
hid_t fspace_id = H5I_INVALID_HID;
void *buf = NULL;
curr_nerrors = nerrors;
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
if (MAINPROCESS)
TESTING_2("reading back file with single MPI rank");
/* Get a default Subfiling FAPL */
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
/* Create file on all ranks */
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
/* Calculate target size for dataset to stripe it across available IOCs */
target_size = (stripe_size_g > 0) ? (size_t)stripe_size_g : H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
/* Nudge stripe size to be multiple of C type size */
if ((target_size % sizeof(SUBF_C_TYPE)) != 0)
target_size += sizeof(SUBF_C_TYPE) - (target_size % sizeof(SUBF_C_TYPE));
target_size *= (size_t)mpi_size;
VRFY(((target_size % sizeof(SUBF_C_TYPE)) == 0), "target size check succeeded");
if (stripe_size_g > 0) {
VRFY((target_size >= (size_t)stripe_size_g), "target size check succeeded");
}
else {
VRFY((target_size >= H5FD_SUBFILING_DEFAULT_STRIPE_SIZE), "target size check succeeded");
}
dset_dims[0] = (hsize_t)(target_size / sizeof(SUBF_C_TYPE));
fspace_id = H5Screate_simple(1, dset_dims, NULL);
VRFY((fspace_id >= 0), "H5Screate_simple succeeded");
dcpl_id = create_dcpl_id(1, dset_dims, dxpl_id);
VRFY((dcpl_id >= 0), "DCPL creation succeeded");
dset_id = H5Dcreate2(file_id, "DSET", SUBF_HDF5_TYPE, fspace_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset creation succeeded");
/* Select hyperslab */
count[0] = dset_dims[0] / (hsize_t)mpi_size;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = malloc(count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "malloc succeeded");
for (size_t i = 0; i < count[0]; i++)
((SUBF_C_TYPE *)buf)[i] = (SUBF_C_TYPE)((size_t)mpi_rank + i);
VRFY((H5Dwrite(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset write succeeded");
free(buf);
buf = NULL;
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Pclose(dcpl_id) >= 0), "DCPL close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
if (MAINPROCESS) {
fapl_id = create_subfiling_ioc_fapl(MPI_COMM_SELF, MPI_INFO_NULL, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fopen(SUBF_FILENAME, H5F_ACC_RDONLY, fapl_id);
VRFY((file_id >= 0), "H5Fopen succeeded");
dset_id = H5Dopen2(file_id, "DSET", H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset open succeeded");
buf = calloc(1, target_size);
VRFY(buf, "calloc succeeded");
VRFY((H5Dread(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, H5S_ALL, dxpl_id, buf) >= 0),
"Dataset read succeeded");
for (size_t i = 0; i < (size_t)mpi_size; i++) {
for (size_t j = 0; j < count[0]; j++) {
SUBF_C_TYPE buf_value = ((SUBF_C_TYPE *)buf)[(i * count[0]) + j];
VRFY((buf_value == (SUBF_C_TYPE)(j + i)), "data verification succeeded");
}
}
free(buf);
buf = NULL;
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef SUBF_HDF5_TYPE
#undef SUBF_C_TYPE
/*
* Test to check that an HDF5 file created with the
* Subfiling VFD can be read back with less MPI ranks
* than the file was written with
*/
#define SUBF_FILENAME "test_subfiling_write_many_read_few.h5"
#define SUBF_HDF5_TYPE H5T_NATIVE_INT
#define SUBF_C_TYPE int
static void
test_subfiling_write_many_read_few(void)
{
MPI_Comm sub_comm = MPI_COMM_NULL;
hsize_t start[1];
hsize_t count[1];
hsize_t dset_dims[1];
bool reading_file = false;
size_t target_size;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
hid_t dset_id = H5I_INVALID_HID;
hid_t dxpl_id = H5I_INVALID_HID;
hid_t dcpl_id = H5I_INVALID_HID;
hid_t fspace_id = H5I_INVALID_HID;
void *buf = NULL;
curr_nerrors = nerrors;
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
if (MAINPROCESS)
TESTING_2("reading back file with fewer MPI ranks than written with");
/*
* Skip this test for an MPI communicator size of 1,
* as the test wouldn't really be meaningful
*/
if (mpi_size == 1) {
if (MAINPROCESS)
SKIPPED();
return;
}
/* Get a default Subfiling FAPL */
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
/* Create file on all ranks */
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
/* Calculate target size for dataset to stripe it across available IOCs */
target_size = (stripe_size_g > 0) ? (size_t)stripe_size_g : H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
/* Nudge stripe size to be multiple of C type size */
if ((target_size % sizeof(SUBF_C_TYPE)) != 0)
target_size += sizeof(SUBF_C_TYPE) - (target_size % sizeof(SUBF_C_TYPE));
target_size *= (size_t)mpi_size;
VRFY(((target_size % sizeof(SUBF_C_TYPE)) == 0), "target size check succeeded");
if (stripe_size_g > 0) {
VRFY((target_size >= (size_t)stripe_size_g), "target size check succeeded");
}
else {
VRFY((target_size >= H5FD_SUBFILING_DEFAULT_STRIPE_SIZE), "target size check succeeded");
}
dset_dims[0] = (hsize_t)(target_size / sizeof(SUBF_C_TYPE));
fspace_id = H5Screate_simple(1, dset_dims, NULL);
VRFY((fspace_id >= 0), "H5Screate_simple succeeded");
dcpl_id = create_dcpl_id(1, dset_dims, dxpl_id);
VRFY((dcpl_id >= 0), "DCPL creation succeeded");
dset_id = H5Dcreate2(file_id, "DSET", SUBF_HDF5_TYPE, fspace_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset creation succeeded");
/* Select hyperslab */
count[0] = dset_dims[0] / (hsize_t)mpi_size;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = malloc(count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "malloc succeeded");
for (size_t i = 0; i < count[0]; i++)
((SUBF_C_TYPE *)buf)[i] = (SUBF_C_TYPE)((size_t)mpi_rank + i);
VRFY((H5Dwrite(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset write succeeded");
free(buf);
buf = NULL;
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Pclose(dcpl_id) >= 0), "DCPL close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
/*
* If only using 1 node, read file back with a
* few ranks from that node. Otherwise, read file
* back with 1 MPI rank per node
*/
if (num_nodes_g == 1) {
int color;
if (mpi_size < 2) {
color = 1;
}
else if (mpi_size < 4) {
color = (mpi_rank < (mpi_size / 2));
}
else {
color = (mpi_rank < (mpi_size / 4));
}
if (mpi_size > 1) {
mpi_code_g = MPI_Comm_split(comm_g, color, mpi_rank, &sub_comm);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Comm_split succeeded");
}
if (color)
reading_file = true;
}
else {
if (node_local_rank == 0) {
sub_comm = ioc_comm;
reading_file = true;
}
}
if (reading_file) {
fapl_id = create_subfiling_ioc_fapl(sub_comm, MPI_INFO_NULL, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
file_id = H5Fopen(SUBF_FILENAME, H5F_ACC_RDONLY, fapl_id);
VRFY((file_id >= 0), "H5Fopen succeeded");
dset_id = H5Dopen2(file_id, "DSET", H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset open succeeded");
buf = calloc(1, target_size);
VRFY(buf, "calloc succeeded");
VRFY((H5Dread(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, H5S_ALL, dxpl_id, buf) >= 0),
"Dataset read succeeded");
for (size_t i = 0; i < (size_t)mpi_size; i++) {
for (size_t j = 0; j < count[0]; j++) {
SUBF_C_TYPE buf_value = ((SUBF_C_TYPE *)buf)[(i * count[0]) + j];
VRFY((buf_value == (SUBF_C_TYPE)(j + i)), "data verification succeeded");
}
}
free(buf);
buf = NULL;
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
}
if ((sub_comm != MPI_COMM_NULL) && (num_nodes_g == 1)) {
mpi_code_g = MPI_Comm_free(&sub_comm);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Comm_free succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
CHECK_PASSED();
}
#undef SUBF_FILENAME
#undef SUBF_HDF5_TYPE
#undef SUBF_C_TYPE
/*
* Test that the subfiling file can be read with the
* sec2 driver after being fused back together with
* the h5fuse utility
*/
#define SUBF_FILENAME "test_subfiling_h5fuse.h5"
#define SUBF_HDF5_TYPE H5T_NATIVE_INT
#define SUBF_C_TYPE int
static void
test_subfiling_h5fuse(void)
{
#if defined(H5_HAVE_FORK) && defined(H5_HAVE_WAITPID)
h5_stat_t file_info;
uint64_t file_inode;
hsize_t start[1];
hsize_t count[1];
hsize_t dset_dims[1];
size_t target_size;
hid_t file_id = H5I_INVALID_HID;
hid_t fapl_id = H5I_INVALID_HID;
hid_t dset_id = H5I_INVALID_HID;
hid_t dxpl_id = H5I_INVALID_HID;
hid_t dcpl_id = H5I_INVALID_HID;
hid_t fspace_id = H5I_INVALID_HID;
void *buf = NULL;
int skip_test = 0;
#endif
curr_nerrors = nerrors;
dxpl_id = H5Pcreate(H5P_DATASET_XFER);
VRFY((dxpl_id >= 0), "DXPL creation succeeded");
/* Set selection I/O mode on DXPL */
VRFY((H5Pset_selection_io(dxpl_id, H5D_SELECTION_IO_MODE_ON) >= 0), "H5Pset_selection_io succeeded");
if (MAINPROCESS)
TESTING_2("h5fuse utility");
#if defined(H5_HAVE_FORK) && defined(H5_HAVE_WAITPID)
/*
* Check if h5fuse script exists in current directory;
* Skip test if it doesn't
*/
if (MAINPROCESS) {
FILE *h5fuse_script;
h5fuse_script = fopen("h5fuse", "r");
if (h5fuse_script)
fclose(h5fuse_script);
else
skip_test = 1;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&skip_test, 1, MPI_INT, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
if (skip_test) {
if (MAINPROCESS)
SKIPPED();
return;
}
/* Get a default Subfiling FAPL */
fapl_id = create_subfiling_ioc_fapl(comm_g, info_g, false, NULL, 0);
VRFY((fapl_id >= 0), "FAPL creation succeeded");
/* Create file on all ranks */
file_id = H5Fcreate(SUBF_FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
VRFY((file_id >= 0), "H5Fcreate succeeded");
/*
* Retrieve the HDF5 file's inode number before operating on
* it, since it might change after fusing
*/
HDcompile_assert(sizeof(uint64_t) >= sizeof(ino_t));
if (MAINPROCESS) {
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
file_inode = (uint64_t)file_info.st_ino;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&file_inode, 1, MPI_UINT64_T, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
/* Calculate target size for dataset to stripe it across available IOCs */
target_size = (stripe_size_g > 0) ? (size_t)stripe_size_g : H5FD_SUBFILING_DEFAULT_STRIPE_SIZE;
/* Nudge stripe size to be multiple of C type size */
if ((target_size % sizeof(SUBF_C_TYPE)) != 0)
target_size += sizeof(SUBF_C_TYPE) - (target_size % sizeof(SUBF_C_TYPE));
target_size *= (size_t)mpi_size;
VRFY(((target_size % sizeof(SUBF_C_TYPE)) == 0), "target size check succeeded");
if (stripe_size_g > 0) {
VRFY((target_size >= (size_t)stripe_size_g), "target size check succeeded");
}
else {
VRFY((target_size >= H5FD_SUBFILING_DEFAULT_STRIPE_SIZE), "target size check succeeded");
}
dset_dims[0] = (hsize_t)(target_size / sizeof(SUBF_C_TYPE));
fspace_id = H5Screate_simple(1, dset_dims, NULL);
VRFY((fspace_id >= 0), "H5Screate_simple succeeded");
dcpl_id = create_dcpl_id(1, dset_dims, dxpl_id);
VRFY((dcpl_id >= 0), "DCPL creation succeeded");
dset_id = H5Dcreate2(file_id, "DSET", SUBF_HDF5_TYPE, fspace_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset creation succeeded");
/* Select hyperslab */
count[0] = dset_dims[0] / (hsize_t)mpi_size;
start[0] = (hsize_t)mpi_rank * count[0];
VRFY((H5Sselect_hyperslab(fspace_id, H5S_SELECT_SET, start, NULL, count, NULL) >= 0),
"H5Sselect_hyperslab succeeded");
buf = malloc(count[0] * sizeof(SUBF_C_TYPE));
VRFY(buf, "malloc succeeded");
for (size_t i = 0; i < count[0]; i++)
((SUBF_C_TYPE *)buf)[i] = (SUBF_C_TYPE)((size_t)mpi_rank + i);
VRFY((H5Dwrite(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, fspace_id, dxpl_id, buf) >= 0),
"Dataset write succeeded");
free(buf);
buf = NULL;
VRFY((H5Pset_dxpl_mpio(dxpl_id, H5FD_MPIO_INDEPENDENT) >= 0), "H5Pset_dxpl_mpio succeeded");
VRFY((H5Sclose(fspace_id) >= 0), "File dataspace close succeeded");
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Pclose(dcpl_id) >= 0), "DCPL close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
if (MAINPROCESS) {
pid_t pid = 0;
pid_t tmppid;
int status;
pid = fork();
VRFY(pid >= 0, "fork succeeded");
if (pid == 0) {
char *tmp_filename;
char *args[7];
tmp_filename = malloc(PATH_MAX);
VRFY(tmp_filename, "malloc succeeded");
/* Generate name for configuration file */
snprintf(tmp_filename, PATH_MAX, "%s/" H5FD_SUBFILING_CONFIG_FILENAME_TEMPLATE, config_dir,
SUBF_FILENAME, file_inode);
args[0] = strdup("env");
args[1] = strdup("./h5fuse");
args[2] = strdup("-q");
args[3] = strdup("-f");
args[4] = tmp_filename;
args[5] = NULL;
/* Call h5fuse script from MPI rank 0 */
execvp("env", args);
}
else {
tmppid = waitpid(pid, &status, 0);
VRFY(tmppid >= 0, "waitpid succeeded");
if (WIFEXITED(status)) {
int ret;
if ((ret = WEXITSTATUS(status)) != 0) {
printf("h5fuse process exited with error code %d\n", ret);
fflush(stdout);
MPI_Abort(comm_g, -1);
}
}
else {
printf("h5fuse process terminated abnormally\n");
fflush(stdout);
MPI_Abort(comm_g, -1);
}
}
/* Verify the size of the fused file */
if (!enable_compression) {
VRFY((HDstat(SUBF_FILENAME, &file_info) >= 0), "HDstat succeeded");
VRFY(((size_t)file_info.st_size >= target_size), "File size verification succeeded");
}
/* Re-open file with sec2 driver and verify the data */
file_id = H5Fopen(SUBF_FILENAME, H5F_ACC_RDONLY, H5P_DEFAULT);
VRFY((file_id >= 0), "H5Fopen succeeded");
dset_id = H5Dopen2(file_id, "DSET", H5P_DEFAULT);
VRFY((dset_id >= 0), "Dataset open succeeded");
buf = calloc(1, target_size);
VRFY(buf, "calloc succeeded");
VRFY((H5Dread(dset_id, SUBF_HDF5_TYPE, H5S_BLOCK, H5S_ALL, dxpl_id, buf) >= 0),
"Dataset read succeeded");
for (size_t i = 0; i < (size_t)mpi_size; i++) {
for (size_t j = 0; j < count[0]; j++) {
SUBF_C_TYPE buf_value = ((SUBF_C_TYPE *)buf)[(i * count[0]) + j];
VRFY((buf_value == (SUBF_C_TYPE)(j + i)), "data verification succeeded");
}
}
free(buf);
buf = NULL;
VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
}
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
/*
* Since we've now fused the file back together, the Subfiling
* VFD will no longer be able to work with it. The main HDF5
* file should be able to be deleted using the sec2 VFD, but we
* have to delete the extra files manually.
*/
if (MAINPROCESS) {
char *filename_buf;
int num_subfiles = num_iocs_g;
int num_digits = (int)(log10(num_subfiles) + 1);
/* Delete the regular HDF5 file */
H5Pset_fapl_sec2(fapl_id);
H5E_BEGIN_TRY
{
H5Fdelete(SUBF_FILENAME, fapl_id);
}
H5E_END_TRY
filename_buf = malloc(PATH_MAX);
VRFY(filename_buf, "malloc succeeded");
/* Generate name for configuration file */
snprintf(filename_buf, PATH_MAX, "%s/" H5FD_SUBFILING_CONFIG_FILENAME_TEMPLATE, config_dir,
SUBF_FILENAME, file_inode);
/* Delete the configuration file */
if (HDremove(filename_buf) < 0) {
printf("couldn't remove Subfiling VFD configuration file '%s'\n", filename_buf);
nerrors++;
}
for (int i = 0; i < num_subfiles; i++) {
/* Generate name for each subfile */
snprintf(filename_buf, PATH_MAX, H5FD_SUBFILING_FILENAME_TEMPLATE, SUBF_FILENAME, file_inode,
num_digits, i + 1, num_subfiles);
/* Delete the subfile */
if (HDremove(filename_buf) < 0) {
printf("couldn't remove subfile '%s'\n", filename_buf);
nerrors++;
}
}
free(filename_buf);
}
VRFY((H5Pclose(fapl_id) >= 0), "FAPL close succeeded");
VRFY((H5Pclose(dxpl_id) >= 0), "DXPL close succeeded");
mpi_code_g = MPI_Barrier(comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Barrier succeeded");
CHECK_PASSED();
#else
SKIPPED();
#endif
}
#undef SUBF_FILENAME
#undef SUBF_HDF5_TYPE
#undef SUBF_C_TYPE
static void
parse_subfiling_env_vars(void)
{
char *env_value;
if (NULL != (env_value = getenv(H5FD_SUBFILING_STRIPE_SIZE))) {
stripe_size_g = strtoll(env_value, NULL, 0);
if ((ERANGE == errno) || (stripe_size_g <= 0))
stripe_size_g = -1;
}
if (NULL != (env_value = getenv(H5FD_SUBFILING_IOC_PER_NODE))) {
ioc_per_node_g = strtol(env_value, NULL, 0);
if ((ERANGE == errno) || (ioc_per_node_g <= 0))
ioc_per_node_g = -1;
else if (ioc_per_node_g * num_nodes_g > mpi_size)
/*
* If the number of IOCs per node from the environment
* causes the total number of IOCs to exceed the number
* of MPI ranks available, the Subfiling VFD will simply
* use all of the MPI ranks on a node as IOCs
*/
ioc_per_node_g = node_local_size;
}
if (NULL != (env_value = getenv(H5FD_IOC_THREAD_POOL_SIZE))) {
ioc_thread_pool_size_g = atoi(env_value);
if (ioc_thread_pool_size_g <= 0)
ioc_thread_pool_size_g = -1;
}
if (NULL != (env_value = getenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX))) {
assert(config_dir);
strncpy(config_dir, env_value, PATH_MAX);
/* Just in case.. */
config_dir[PATH_MAX - 1] = '\0';
if (*config_dir == '\0') {
*config_dir = '.';
*(config_dir + 1) = '\0';
}
}
}
int
main(int argc, char **argv)
{
unsigned seed;
bool must_unset_stripe_size_env = false;
bool must_unset_ioc_per_node_env = false;
bool must_unset_ioc_thread_count_env = false;
bool must_unset_config_dir_env = false;
int required = MPI_THREAD_MULTIPLE;
int provided = 0;
HDcompile_assert(SUBFILING_MIN_STRIPE_SIZE <= H5FD_SUBFILING_DEFAULT_STRIPE_SIZE);
/* Initialize MPI */
if (MPI_SUCCESS != (mpi_code_g = MPI_Init_thread(&argc, &argv, required, &provided))) {
printf("MPI_Init_thread failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_rank(comm_g, &mpi_rank))) {
printf("MPI_Comm_rank failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (provided != required) {
if (MAINPROCESS)
printf("MPI doesn't support MPI_Init_thread with MPI_THREAD_MULTIPLE\n");
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_size(comm_g, &mpi_size))) {
if (MAINPROCESS)
printf("MPI_Comm_size failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
/* Split communicator according to node-local ranks */
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_split_type(comm_g, MPI_COMM_TYPE_SHARED, mpi_rank,
MPI_INFO_NULL, &node_local_comm))) {
if (MAINPROCESS)
printf("MPI_Comm_split_type failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_size(node_local_comm, &node_local_size))) {
if (MAINPROCESS)
printf("MPI_Comm_size failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_rank(node_local_comm, &node_local_rank))) {
if (MAINPROCESS)
printf("MPI_Comm_rank failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
/* Get the number of nodes being run on */
num_nodes_g = (node_local_rank == 0) ? 1 : 0;
if (MPI_SUCCESS !=
(mpi_code_g = MPI_Allreduce(MPI_IN_PLACE, &num_nodes_g, 1, MPI_INT, MPI_SUM, comm_g))) {
if (MAINPROCESS)
printf("MPI_Allreduce failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
/*
* Split communicator according to rank value across nodes.
* If the SELECT_IOC_ONE_PER_NODE IOC selection strategy is
* used, each rank with a node local rank value of 0 will
* be an IOC in the new communicator.
*/
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_split(comm_g, node_local_rank, mpi_rank, &ioc_comm))) {
if (MAINPROCESS)
printf("MPI_Comm_split failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_size(ioc_comm, &ioc_comm_size))) {
if (MAINPROCESS)
printf("MPI_Comm_size failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (MPI_SUCCESS != (mpi_code_g = MPI_Comm_rank(ioc_comm, &ioc_comm_rank))) {
if (MAINPROCESS)
printf("MPI_Comm_rank failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
if (H5dont_atexit() < 0) {
if (MAINPROCESS)
printf("Failed to turn off atexit processing. Continue.\n");
}
H5open();
if (MAINPROCESS) {
printf("Testing Subfiling VFD functionality\n");
}
TestAlarmOn();
/*
* Obtain and broadcast seed value since ranks
* aren't guaranteed to arrive here at exactly
* the same time and could end up out of sync
* with each other in regards to random number
* generation
*/
if (mpi_rank == 0)
seed = (unsigned)time(NULL);
if (mpi_size > 1) {
if (MPI_SUCCESS != (mpi_code_g = MPI_Bcast(&seed, 1, MPI_UNSIGNED, 0, comm_g))) {
if (MAINPROCESS)
printf("MPI_Bcast failed with error code %d\n", mpi_code_g);
nerrors++;
goto exit;
}
}
srand(seed);
if (MAINPROCESS)
printf("Using seed: %u\n\n", seed);
/* Allocate buffer for possible config file directory specified */
config_dir = malloc(PATH_MAX);
if (!config_dir) {
if (MAINPROCESS)
printf("couldn't allocate space for subfiling config file directory buffer\n");
nerrors++;
goto exit;
}
/* Initialize to current working directory for now */
snprintf(config_dir, PATH_MAX, ".");
/* Grab values from environment variables if set */
parse_subfiling_env_vars();
/*
* Assume that we use the "one IOC per node" selection
* strategy by default, with a possibly modified
* number of IOCs per node value
*/
num_iocs_g = (ioc_per_node_g > 0) ? (int)ioc_per_node_g * num_nodes_g : num_nodes_g;
if (num_iocs_g > mpi_size)
num_iocs_g = mpi_size;
for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
if (MPI_SUCCESS == (mpi_code_g = MPI_Barrier(comm_g))) {
(*tests[i])();
}
else {
if (MAINPROCESS)
MESG("MPI_Barrier failed");
nerrors++;
}
}
if (MAINPROCESS)
puts("");
/*
* Set any unset Subfiling environment variables and re-run
* the tests as a quick smoke check of whether those are
* working correctly
*/
if (stripe_size_g < 0) {
int64_t stripe_size;
char tmp[64];
/*
* Choose a random Subfiling stripe size between
* the smallest allowed value and the default value
*/
if (mpi_rank == 0) {
stripe_size = (rand() % (H5FD_SUBFILING_DEFAULT_STRIPE_SIZE - SUBFILING_MIN_STRIPE_SIZE + 1)) +
SUBFILING_MIN_STRIPE_SIZE;
}
if (mpi_size > 1) {
mpi_code_g = MPI_Bcast(&stripe_size, 1, MPI_INT64_T, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
}
snprintf(tmp, sizeof(tmp), "%" PRId64, stripe_size);
if (HDsetenv(H5FD_SUBFILING_STRIPE_SIZE, tmp, 1) < 0) {
if (MAINPROCESS)
printf("HDsetenv failed\n");
nerrors++;
goto exit;
}
must_unset_stripe_size_env = true;
}
if (ioc_per_node_g < 0) {
const char *ioc_per_node_str;
if (2 * num_nodes_g <= mpi_size)
ioc_per_node_str = "2";
else
ioc_per_node_str = "1";
if (HDsetenv(H5FD_SUBFILING_IOC_PER_NODE, ioc_per_node_str, 1) < 0) {
if (MAINPROCESS)
printf("HDsetenv failed\n");
nerrors++;
goto exit;
}
must_unset_ioc_per_node_env = true;
}
if (ioc_thread_pool_size_g < 0) {
if (HDsetenv(H5FD_IOC_THREAD_POOL_SIZE, "2", 1) < 0) {
if (MAINPROCESS)
printf("HDsetenv failed\n");
nerrors++;
goto exit;
}
must_unset_ioc_thread_count_env = true;
}
if (NULL == getenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX)) {
int rand_value = 0;
if (MAINPROCESS)
rand_value = rand() % 2;
mpi_code_g = MPI_Bcast(&rand_value, 1, MPI_INT, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
/* Randomly set config file prefix to either "." or a real
* directory to test both cases
*/
if (rand_value == 0) {
int mkdir_success = 0;
if (MAINPROCESS) {
if ((HDmkdir(SUBFILING_CONFIG_FILE_DIR, (mode_t)0755) < 0) && (errno != EEXIST)) {
printf("couldn't create temporary testing directory\n");
mkdir_success = 0;
}
else
mkdir_success = 1;
}
mpi_code_g = MPI_Bcast(&mkdir_success, 1, MPI_INT, 0, comm_g);
VRFY((mpi_code_g == MPI_SUCCESS), "MPI_Bcast succeeded");
if (!mkdir_success) {
if (MAINPROCESS)
printf("HDmkdir failed\n");
nerrors++;
goto exit;
}
if (HDsetenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX, SUBFILING_CONFIG_FILE_DIR, 1) < 0) {
if (MAINPROCESS)
printf("HDsetenv failed\n");
nerrors++;
goto exit;
}
}
else {
if (HDsetenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX, ".", 1) < 0) {
if (MAINPROCESS)
printf("HDsetenv failed\n");
nerrors++;
goto exit;
}
}
must_unset_config_dir_env = true;
}
/* Grab values from environment variables */
parse_subfiling_env_vars();
/*
* Assume that we use the "one IOC per node" selection
* strategy by default, with a possibly modified
* number of IOCs per node value
*/
num_iocs_g = (ioc_per_node_g > 0) ? (int)ioc_per_node_g * num_nodes_g : num_nodes_g;
if (num_iocs_g > mpi_size)
num_iocs_g = mpi_size;
if (MAINPROCESS)
printf(" Re-running tests with compression enabled\n");
#ifdef H5_HAVE_FILTER_DEFLATE
enable_compression = true;
for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
if (MPI_SUCCESS == (mpi_code_g = MPI_Barrier(comm_g))) {
(*tests[i])();
}
else {
if (MAINPROCESS)
MESG("MPI_Barrier failed");
nerrors++;
}
}
enable_compression = false;
#else
if (MAINPROCESS)
SKIPPED();
#endif
if (MAINPROCESS)
printf("\nRe-running tests with environment variables set\n");
for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
if (MPI_SUCCESS == (mpi_code_g = MPI_Barrier(comm_g))) {
(*tests[i])();
}
else {
if (MAINPROCESS)
MESG("MPI_Barrier failed");
nerrors++;
}
}
if (MAINPROCESS)
printf("\n Re-running tests with compression enabled\n");
#ifdef H5_HAVE_FILTER_DEFLATE
enable_compression = true;
for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
if (MPI_SUCCESS == (mpi_code_g = MPI_Barrier(comm_g))) {
(*tests[i])();
}
else {
if (MAINPROCESS)
MESG("MPI_Barrier failed");
nerrors++;
}
}
enable_compression = false;
#else
if (MAINPROCESS)
SKIPPED();
#endif
if (nerrors)
goto exit;
if (MAINPROCESS)
puts("\nAll Subfiling VFD tests passed\n");
exit:
if (must_unset_stripe_size_env)
HDunsetenv(H5FD_SUBFILING_STRIPE_SIZE);
if (must_unset_ioc_per_node_env)
HDunsetenv(H5FD_SUBFILING_IOC_PER_NODE);
if (must_unset_ioc_thread_count_env)
HDunsetenv(H5FD_IOC_THREAD_POOL_SIZE);
if (must_unset_config_dir_env)
HDunsetenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX);
if (MAINPROCESS) {
if (HDrmdir(SUBFILING_CONFIG_FILE_DIR) < 0 && (errno != ENOENT)) {
printf("couldn't remove temporary testing directory\n");
nerrors++;
}
}
if (nerrors) {
if (MAINPROCESS)
printf("*** %d TEST ERROR%s OCCURRED ***\n", nerrors, nerrors > 1 ? "S" : "");
}
TestAlarmOff();
H5close();
if (MPI_COMM_WORLD != ioc_comm)
MPI_Comm_free(&ioc_comm);
if (MPI_COMM_WORLD != node_local_comm)
MPI_Comm_free(&node_local_comm);
MPI_Finalize();
exit(nerrors ? EXIT_FAILURE : EXIT_SUCCESS);
}
#else /* H5_HAVE_SUBFILING_VFD */
int
main(void)
{
h5_reset();
printf("Testing Subfiling VFD functionality\n");
printf("SKIPPED - Subfiling VFD not built\n");
exit(EXIT_SUCCESS);
}
#endif /* H5_HAVE_SUBFILING_VFD */
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