90 строки
2.4 KiB
C
90 строки
2.4 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
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* (C) 2007 by Argonne National Laboratory.
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* See COPYRIGHT in top-level directory.
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*/
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/* Look for regressions in aggregator code. A more simple access pattern than
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* aggregation1 */
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#include <mpi.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string.h>
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#define BUFSIZE 512
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static void handle_error(int errcode, const char *str)
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{
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char msg[MPI_MAX_ERROR_STRING];
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int resultlen;
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MPI_Error_string(errcode, msg, &resultlen);
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fprintf(stderr, "%s: %s\n", str, msg);
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MPI_Abort(MPI_COMM_WORLD, 1);
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}
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int main(int argc, char ** argv)
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{
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MPI_Info info = MPI_INFO_NULL;
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MPI_File fh;
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MPI_Offset off=0;
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MPI_Status status;
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int errcode;
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int i, rank, errs=0, toterrs, buffer[BUFSIZE], buf2[BUFSIZE];
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MPI_Init(&argc, &argv);
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MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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MPI_Info_create(&info);
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MPI_Info_set(info, "romio_cb_write", "enable");
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MPI_Info_set(info, "cb_nodes", "1");
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for (i=0; i<BUFSIZE; i++) {
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buffer[i] = 10000+rank;
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}
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off = rank*sizeof(buffer);
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errcode = MPI_File_open(MPI_COMM_WORLD, argv[1],
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MPI_MODE_WRONLY|MPI_MODE_CREATE, info, &fh);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_open");
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errcode = MPI_File_write_at_all(fh, off, buffer, BUFSIZE,
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MPI_INT, &status);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_write_at_all");
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errcode = MPI_File_close(&fh);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_close");
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errcode = MPI_File_open(MPI_COMM_WORLD, argv[1],
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MPI_MODE_RDONLY, info, &fh);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_open");
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errcode = MPI_File_read_at_all(fh, off, buf2, BUFSIZE,
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MPI_INT, &status);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_read_at_all");
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errcode = MPI_File_close(&fh);
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if (errcode != MPI_SUCCESS) handle_error(errcode, "MPI_File_close");
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for (i=0; i<BUFSIZE; i++) {
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if (buf2[i] != 10000+rank)
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errs++;
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}
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MPI_Allreduce( &errs, &toterrs, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
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if (rank == 0) {
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if( toterrs > 0) {
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fprintf( stderr, "Found %d errors\n", toterrs );
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}
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else {
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fprintf( stdout, " No Errors\n" );
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}
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}
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MPI_Info_free(&info);
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MPI_Finalize();
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return 0;
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}
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