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#include <stdio.h>
#include "hdf5.h"
#include "H5FDsubfile_public.h"
#include "mpi.h"
/* Elements per rank */
#define DATA_SIZE 100000
#define WRITE_OP 1
#define READ_OP 2
int mpi_size = -1;
int mpi_rank = -1;
static int test_subfile_op(int op_type, hid_t subfile_id, int64_t offset, int64_t local_elements, void *local_data)
{
int i, flags = O_RDWR;
int errors = 0;
int loop_count = 20;
int64_t local_data_size = local_elements * sizeof(int);
int64_t total_data_size = 0;
int (*subfile_ftn)(hid_t context_id,int64_t offset, int64_t elements, int dtype_extent, void *data) = sf_read_independent;
double m_startTime, m_endTime;
double this_time, max_time, min_time, total_time, avg_time;
double bw;
const char *OPERATION = "READ";
if (op_type == WRITE_OP) {
flags = O_CREAT|O_TRUNC|O_RDWR;
subfile_ftn = sf_write_independent;
OPERATION = "WRITE";
}
for(i=0; i < loop_count; i++) {
m_startTime = MPI_Wtime();
if (sf_open_subfiles(subfile_id, NULL, flags) < 0) {
puts("sf_open_subfiles returned an error!");
errors++;
goto done;
}
if (subfile_ftn(subfile_id, offset, local_elements, sizeof(int), local_data) < 0) {
puts("subfile_ftn returned an error!");
errors++;
goto done;
}
if (sf_close_subfiles(subfile_id) < 0) {
puts("sf_close_subfiles returned an error!");
errors++;
goto done;
}
m_endTime = MPI_Wtime();
this_time = m_endTime - m_startTime;
if (i == 0) {
min_time = this_time;
max_time = this_time;
}
else if (this_time < min_time) {
min_time = this_time;
}
if (this_time > max_time) {
max_time = this_time;
}
total_time += this_time;
}
total_data_size = local_data_size * mpi_size;
avg_time = total_time / (double) loop_count;
bw = ((double)total_data_size)/ avg_time / (1024.0 * 1024.0);
if (mpi_rank == 0) {
printf("%s Perf: %lf BW/[MBs] %ld Bytes AvgTime[sec] %lf\n", OPERATION, bw, total_data_size, avg_time);
fflush(stdout);
}
done:
return errors;
}
int
main(int argc, char **argv)
{
int errors = 0;
int mpi_provides, require = MPI_THREAD_MULTIPLE;
hid_t subfile_id = -1;
double m_startTime, m_endTime;
double this_time, max_time, min_time, total_time, avg_time;
double bw;
int64_t local_elements = DATA_SIZE;
int64_t local_data_size = 0;
int64_t offset = 0;
int *local_data = NULL;
int *verify_data = NULL;
MPI_Init_thread(&argc, &argv, require, &mpi_provides);
MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
if (argc > 1) {
int64_t check_value = atoll(argv[1]);
if (check_value > 0) {
local_elements = check_value;
}
}
H5open();
local_data_size = local_elements * sizeof(int);
local_data = (int *)malloc((size_t)local_data_size);
if (local_data) {
int k, base = local_elements * mpi_rank;
offset = local_data_size * mpi_rank;
for (k=0; k < local_elements; k++) {
local_data[k] = k + base;
}
}
else {
perror("malloc failure");
errors++;
goto done;
}
verify_data = (int *)malloc((size_t)local_data_size);
if (verify_data == NULL) {
perror("malloc failure");
errors++;
goto done;
}
if (H5FDsubfiling_init() == SUCCEED) {
subfile_id = get_subfiling_context();
printf("[%d] subfile_id = %lx\n", mpi_rank, subfile_id);
}
else if (mpi_rank == 0) {
puts("Error: Unable to initialize subfiling!");
errors++;
goto done;
}
if (test_subfile_op( WRITE_OP, subfile_id, offset, local_elements, local_data)) {
puts("Subfile writing test returned an error!");
errors++;
goto done;
}
if (test_subfile_op( READ_OP, subfile_id, offset, local_elements, verify_data)) {
puts("Subfile reading test returned an error!");
errors++;
goto done;
}
done:
H5FDsubfiling_finalize();
MPI_Barrier(MPI_COMM_WORLD);
if (local_data) {
free(local_data);
local_data = NULL;
}
H5close();
MPI_Finalize();
return 0;
}
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