?? view.c
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#include "mpi.h"int main( int argc, char *argv[] ){ MPI_Aint lb, extent; MPI_Datatype etype, filetype, contig; MPI_Offset disp; MPI_File fh; int buf[1000]; MPI_Init( &argc, &argv ); /* ... other application code ... */ MPI_File_open(MPI_COMM_WORLD, "/pfs/datafile", MPI_MODE_CREATE | MPI_MODE_RDWR, MPI_INFO_NULL, &fh); MPI_Type_contiguous(2, MPI_INT, &contig); lb = 0; extent = 6 * sizeof(int); MPI_Type_create_resized(contig, lb, extent, &filetype); MPI_Type_commit(&filetype); disp = 5 * sizeof(int); /* assume displacement in this file view is of size equal to 5 integers */ etype = MPI_INT; MPI_File_set_view(fh, disp, etype, filetype, "native", MPI_INFO_NULL); MPI_File_write(fh, buf, 1000, MPI_INT, MPI_STATUS_IGNORE); /* ... */ MPI_Finalize(); return 0;}
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