main
|
Last change
on this file was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago |
|
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
|
-
Property mode
set to
100644
|
|
File size:
866 bytes
|
| Line | |
|---|
| 1 | /* Good broadcast followed by gather.
|
|---|
| 2 | */
|
|---|
| 3 | #include<mpi.h>
|
|---|
| 4 | #include<assert.h>
|
|---|
| 5 | #include<stdlib.h>
|
|---|
| 6 |
|
|---|
| 7 | #define COUNT 5
|
|---|
| 8 | #ifdef _CIVL
|
|---|
| 9 | $input double a[COUNT];
|
|---|
| 10 | #else
|
|---|
| 11 | double a[COUNT];
|
|---|
| 12 | #endif
|
|---|
| 13 | double buf1[COUNT];
|
|---|
| 14 | double *buf2;
|
|---|
| 15 | int nprocs;
|
|---|
| 16 | int rank;
|
|---|
| 17 |
|
|---|
| 18 | void main() {
|
|---|
| 19 | int argc;
|
|---|
| 20 | char **argv;
|
|---|
| 21 | int i;
|
|---|
| 22 |
|
|---|
| 23 | MPI_Init(&argc, &argv);
|
|---|
| 24 | MPI_Comm_rank(MPI_COMM_WORLD, &rank);
|
|---|
| 25 | MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
|
|---|
| 26 | if (rank == 0) {
|
|---|
| 27 | for (i=0; i<COUNT; i++)
|
|---|
| 28 | buf1[i] = a[i];
|
|---|
| 29 | }
|
|---|
| 30 | MPI_Bcast(&buf1[0], COUNT, MPI_DOUBLE, 0, MPI_COMM_WORLD);
|
|---|
| 31 | if (rank == 1)
|
|---|
| 32 | buf2 = (double*)malloc(nprocs*COUNT*sizeof(double));
|
|---|
| 33 | else
|
|---|
| 34 | buf2= (double*)NULL;
|
|---|
| 35 | MPI_Gather(&buf1[0], COUNT, MPI_DOUBLE,
|
|---|
| 36 | buf2, COUNT, MPI_DOUBLE,
|
|---|
| 37 | 1, MPI_COMM_WORLD);
|
|---|
| 38 | if (rank == 1) {
|
|---|
| 39 | for (i=0; i<nprocs*COUNT; i++)
|
|---|
| 40 | assert(buf2[i]==a[i%COUNT]);
|
|---|
| 41 | free(buf2);
|
|---|
| 42 | }
|
|---|
| 43 | MPI_Finalize();
|
|---|
| 44 | }
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
