mirror of https://github.com/intel/intel-qs.git
100 lines
2.6 KiB
C
100 lines
2.6 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 <assert.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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const MPI_Count test_int_max = BigMPI_Get_max_int();
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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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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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double * baseptr = NULL;
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MPI_Win win;
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MPI_Aint winsize = (rank==0 ? n : 0);
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#if MPI_VERSION >= 3
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/* Allocate all the window memory on rank 0 */
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MPI_Win_allocate(winsize, sizeof(double), MPI_INFO_NULL, MPI_COMM_WORLD, &baseptr, &win);
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MPI_Win_lock_all(0, win);
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#else
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MPI_Alloc_mem(winsize*sizeof(double), MPI_INFO_NULL, &baseptr);
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MPI_Win_create(baseptr, size, sizeof(double), MPI_INFO_NULL, MPI_COMM_WORLD, &win);
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#endif
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if (rank==0) {
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for (size_t i=0; i<(n/sizeof(double)); i++) {
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baseptr[i] = 0.0;
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}
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#if MPI_VERSION >= 3
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MPI_Win_sync(win);
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#endif
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}
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MPI_Barrier(MPI_COMM_WORLD);
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double * buf = NULL;
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MPI_Alloc_mem((MPI_Aint)n, MPI_INFO_NULL, &buf);
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for (size_t i=0; i<(n/sizeof(double)); i++) {
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buf[i] = 1.0;
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}
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#if MPI_VERSION < 3
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MPI_Win_lock(MPI_LOCK_EXCLUSIVE, 0 /* target */, 0 /* assert */, win);
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#endif
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MPIX_Accumulate_x(buf, n/sizeof(double), MPI_DOUBLE,
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0 /* target */, 0 /* disp */, n/sizeof(double), MPI_DOUBLE, MPI_SUM, win);
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#if MPI_VERSION >= 3
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MPI_Win_flush(0,win);
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#else
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MPI_Win_unlock(0,win);
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#endif
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MPI_Barrier(MPI_COMM_WORLD);
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if (rank==0) {
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#if MPI_VERSION >= 3
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MPI_Win_sync(win);
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#endif
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double expected = size;
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size_t errors = verify_doubles(baseptr, n/sizeof(double), expected);
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if (errors > 0) {
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printf("There were %zu errors!", errors);
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for (size_t i=0; i<(n/(sizeof(double))); i++) {
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printf("baseptr[%zu] = %lf (expected %lf)\n", i, baseptr[i], expected);
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}
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}
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if (errors==0) {
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printf("SUCCESS\n");
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}
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}
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#if MPI_VERSION >= 3
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MPI_Win_unlock_all(win);
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#endif
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MPI_Win_free(&win);
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#if MPI_VERSION < 3
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MPI_Free_mem(baseptr);
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#endif
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MPI_Finalize();
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return 0;
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}
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