126 строки
4.4 KiB
C
126 строки
4.4 KiB
C
#include "mpi.h"
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#include "mpio.h" /* not necessary with MPICH 1.1.1 or HPMPI 1.4 */
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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/* tests various miscellaneous functions. */
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int main(int argc, char **argv)
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{
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int buf[1024], amode, flag, mynod, len, i;
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MPI_File fh;
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MPI_Status status;
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MPI_Datatype newtype;
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MPI_Offset disp, offset;
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MPI_Group group;
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MPI_Datatype etype, filetype;
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char datarep[25], *filename;
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MPI_Init(&argc,&argv);
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MPI_Comm_rank(MPI_COMM_WORLD, &mynod);
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/* process 0 takes the file name as a command-line argument and
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broadcasts it to other processes */
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if (!mynod) {
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i = 1;
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while ((i < argc) && strcmp("-fname", *argv)) {
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i++;
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argv++;
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}
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if (i >= argc) {
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fprintf(stderr, "\n*# Usage: misc -fname filename\n\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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}
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argv++;
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len = strlen(*argv);
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filename = (char *) malloc(len+1);
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strcpy(filename, *argv);
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MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
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MPI_Bcast(filename, len+1, MPI_CHAR, 0, MPI_COMM_WORLD);
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}
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else {
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MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
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filename = (char *) malloc(len+1);
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MPI_Bcast(filename, len+1, MPI_CHAR, 0, MPI_COMM_WORLD);
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}
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MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,
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MPI_INFO_NULL, &fh);
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MPI_File_write(fh, buf, 1024, MPI_INT, &status);
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MPI_File_sync(fh);
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MPI_File_get_amode(fh, &amode);
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if (!mynod) fprintf(stderr, "testing MPI_File_get_amode\n");
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if (amode != (MPI_MODE_CREATE | MPI_MODE_RDWR))
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fprintf(stderr, "amode is %d, should be %d\n\n", amode, MPI_MODE_CREATE |
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MPI_MODE_RDWR);
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MPI_File_get_atomicity(fh, &flag);
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if (flag) fprintf(stderr, "atomicity is %d, should be 0\n", flag);
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if (!mynod) fprintf(stderr, "setting atomic mode\n");
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MPI_File_set_atomicity(fh, 1);
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MPI_File_get_atomicity(fh, &flag);
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if (!flag) fprintf(stderr, "atomicity is %d, should be 1\n", flag);
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MPI_File_set_atomicity(fh, 0);
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if (!mynod) fprintf(stderr, "reverting back to nonatomic mode\n");
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MPI_Type_vector(10, 10, 20, MPI_INT, &newtype);
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MPI_Type_commit(&newtype);
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MPI_File_set_view(fh, 1000, MPI_INT, newtype, "native", MPI_INFO_NULL);
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if (!mynod) fprintf(stderr, "testing MPI_File_get_view\n");
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MPI_File_get_view(fh, &disp, &etype, &filetype, datarep);
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if ((disp != 1000) || strcmp(datarep, "native"))
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fprintf(stderr, "disp = @LL@, datarep = %s, should be 1000, native\n\n", disp, datarep);
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if (!mynod) fprintf(stderr, "testing MPI_File_get_byte_offset\n");
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MPI_File_get_byte_offset(fh, 10, &disp);
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if (disp != (1000+20*sizeof(int))) fprintf(stderr, "byte offset = @LL@, should be %d\n\n", disp, (int) (1000+20*sizeof(int)));
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MPI_File_get_group(fh, &group);
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if (!mynod) fprintf(stderr, "testing MPI_File_set_size\n");
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MPI_File_set_size(fh, 1000+15*sizeof(int));
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MPI_Barrier(MPI_COMM_WORLD);
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MPI_File_sync(fh);
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MPI_File_get_size(fh, &disp);
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if (disp != 1000+15*sizeof(int)) fprintf(stderr, "file size = @LL@, should be %d\n\n", disp, (int) (1000+15*sizeof(int)));
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if (!mynod) fprintf(stderr, "seeking to eof and testing MPI_File_get_position\n");
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MPI_File_seek(fh, 0, MPI_SEEK_END);
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MPI_File_get_position(fh, &disp);
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if (disp != 10) fprintf(stderr, "file pointer posn = @LL@, should be 10\n\n", disp);
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if (!mynod) fprintf(stderr, "testing MPI_File_get_byte_offset\n");
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MPI_File_get_byte_offset(fh, disp, &offset);
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if (offset != (1000+20*sizeof(int))) fprintf(stderr, "byte offset = @LL@, should be %d\n\n", offset, (int) (1000+20*sizeof(int)));
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MPI_Barrier(MPI_COMM_WORLD);
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if (!mynod) fprintf(stderr, "testing MPI_File_seek with MPI_SEEK_CUR\n");
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MPI_File_seek(fh, -10, MPI_SEEK_CUR);
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MPI_File_get_position(fh, &disp);
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MPI_File_get_byte_offset(fh, disp, &offset);
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if (offset != 1000)
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fprintf(stderr, "file pointer posn in bytes = @LL@, should be 1000\n\n", offset);
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if (!mynod) fprintf(stderr, "preallocating disk space up to 8192 bytes\n");
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MPI_File_preallocate(fh, 8192);
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if (!mynod) fprintf(stderr, "closing the file and deleting it\n");
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MPI_File_close(&fh);
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MPI_Barrier(MPI_COMM_WORLD);
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if (!mynod) MPI_File_delete(filename, MPI_INFO_NULL);
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MPI_Type_free(&newtype);
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MPI_Type_free(&filetype);
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MPI_Group_free(&group);
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free(filename);
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MPI_Finalize();
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return 0;
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}
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