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