main
test-branch
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Last change
on this file since 397ae5f 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
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File size:
611 bytes
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| 1 | /* Reduce_coassert: All processes in the MPI_COMM_WORLD sum up their
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| 2 | ranks, the result is reduced to a root process. */
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| 3 | #include <mpi.h>
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| 4 | #include <stdio.h>
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| 5 | #include <civl-mpi.cvh>
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| 6 |
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| 7 | int size, rank;
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| 8 | int root = 0, sum;
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| 9 |
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| 10 | int main(int argc, char * argv[]) {
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| 11 | MPI_Init(&argc, &argv);
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| 12 | MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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| 13 | MPI_Comm_size(MPI_COMM_WORLD, &size);
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| 14 | for(int i = 0; i < 4; i++) {
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| 15 | MPI_Reduce(&i, &sum, 1, MPI_INT, MPI_SUM, root, MPI_COMM_WORLD);
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| 16 | if(!rank)printf("iteration: %d sum=%d\n", i, sum);
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| 17 | $mpi_coassert(MPI_COMM_WORLD, sum@root == (i*size));
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| 18 | }
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| 19 | MPI_Finalize();
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| 20 | return 0;
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| 21 | }
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