main
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Last change
on this file was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago |
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Moved examples, include, build_default.properties, common.xml, and README out from dev.civl.com into the root of the repo.
git-svn-id: svn://vsl.cis.udel.edu/civl/trunk@5704 fb995dde-84ed-4084-dfe6-e5aef3e2452c
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Property mode
set to
100644
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File size:
627 bytes
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| [ed8835c] | 1 | /* cycle: Each process send its rank to its right neighbor and
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| 2 | receives message from the left neighbor.
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| 3 | */
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| 4 | #include<mpi.h>
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| 5 | #include<civl-mpi.cvh>
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| 6 |
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| 7 | int main(int argc, char * argv[]) {
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| 8 | int x, rank, nprocs;
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| 9 | int left, right;
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| 10 | MPI_Comm comm = MPI_COMM_WORLD;
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| 11 |
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| 12 | MPI_Init(&argc, &argv);
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| 13 | MPI_Comm_rank(comm, &rank);
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| 14 | MPI_Comm_size(comm, &nprocs);
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| 15 | left = (rank + 1)%nprocs;
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| 16 | right = (rank - 1)%nprocs;
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| 17 | for(int i = 0; i < nprocs; i++) {
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| 18 | MPI_Sendrecv(&rank, 1, MPI_INT, right, 0,
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| 19 | &x, 1, MPI_INT, left, 0, comm,
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| 20 | MPI_STATUS_IGNORE);
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| 21 | $mpi_coassert(comm, rank == x@right);
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| 22 | }
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| 23 | MPI_Finalize();
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| 24 | return 0;
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| 25 | }
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