mirror of https://github.com/intel/intel-qs.git
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
|
|
#include <mpi.h>
|
|
#include "bigmpi.h"
|
|
#include "verify_buffer.h"
|
|
|
|
/* Yes, it is technically unsafe to cast MPI_Count to MPI_Aint or size_t without checking,
|
|
* given that MPI_Count might be 128b and MPI_Aint and size_t might be 64b, but BigMPI
|
|
* does not aspire to support communication of more than 8 EiB messages at a time. */
|
|
|
|
int main(int argc, char * argv[])
|
|
{
|
|
const MPI_Count test_int_max = BigMPI_Get_max_int();
|
|
|
|
MPI_Init(&argc, &argv);
|
|
|
|
int rank, size;
|
|
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
|
|
MPI_Comm_size(MPI_COMM_WORLD, &size);
|
|
|
|
if (size<1) {
|
|
printf("Use 1 or more processes. \n");
|
|
MPI_Finalize();
|
|
return 1;
|
|
}
|
|
|
|
int l = (argc > 1) ? atoi(argv[1]) : 2;
|
|
int m = (argc > 2) ? atoi(argv[2]) : 17777;
|
|
MPI_Count n = l * test_int_max + m;
|
|
|
|
char * buf_send = NULL;
|
|
char * buf_recv = NULL;
|
|
|
|
MPI_Alloc_mem((MPI_Aint)n, MPI_INFO_NULL, &buf_send);
|
|
MPI_Alloc_mem((MPI_Aint)n * size, MPI_INFO_NULL, &buf_recv);
|
|
|
|
memset(buf_send, rank, (size_t)n);
|
|
memset(buf_recv, -1, (size_t)n * size);
|
|
|
|
/* collective communication */
|
|
MPIX_Gather_x(buf_send, n, MPI_CHAR,
|
|
buf_recv, n, MPI_CHAR,
|
|
0 /* root */, MPI_COMM_WORLD);
|
|
|
|
size_t errors = 0;
|
|
if (rank==0) {
|
|
for (int i = 0; i < size; ++i) {
|
|
errors += verify_buffer(buf_recv + i * n, n, i);
|
|
}
|
|
}
|
|
|
|
/* collective communication */
|
|
MPIX_Allgather_x(buf_send, n, MPI_CHAR,
|
|
buf_recv, n, MPI_CHAR,
|
|
MPI_COMM_WORLD);
|
|
|
|
for (int i = 0; i < size; ++i) {
|
|
errors += verify_buffer(buf_recv + i * n, n, i);
|
|
}
|
|
|
|
MPI_Free_mem(buf_send);
|
|
MPI_Free_mem(buf_recv);
|
|
|
|
if (rank==0 && errors==0) {
|
|
printf("SUCCESS\n");
|
|
}
|
|
|
|
MPI_Finalize();
|
|
|
|
return 0;
|
|
}
|