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:
664 bytes
|
| Line | |
|---|
| 1 | /* Good Allgather.
|
|---|
| 2 | */
|
|---|
| 3 | #include<mpi.h>
|
|---|
| 4 | #include<assert.h>
|
|---|
| 5 | #include<stdlib.h>
|
|---|
| 6 |
|
|---|
| 7 | #define COUNT 10
|
|---|
| 8 |
|
|---|
| 9 | int nprocs;
|
|---|
| 10 | int myrank;
|
|---|
| 11 |
|
|---|
| 12 | void main() {
|
|---|
| 13 | int argc;
|
|---|
| 14 | char **argv;
|
|---|
| 15 | double *recvbuf = (double*)NULL;
|
|---|
| 16 | double sendbuf[COUNT];
|
|---|
| 17 | int i;
|
|---|
| 18 |
|
|---|
| 19 | MPI_Init(&argc, &argv);
|
|---|
| 20 | MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
|
|---|
| 21 | MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
|
|---|
| 22 | for (i=0; i<COUNT; i++)
|
|---|
| 23 | sendbuf[i]=myrank*COUNT+i;
|
|---|
| 24 | recvbuf = (double*)malloc(COUNT*nprocs*sizeof(double));
|
|---|
| 25 | MPI_Allgather(&sendbuf[0], COUNT, MPI_DOUBLE,
|
|---|
| 26 | recvbuf, COUNT, MPI_DOUBLE,
|
|---|
| 27 | MPI_COMM_WORLD);
|
|---|
| 28 | for (i=0; i<nprocs*COUNT; i++) {
|
|---|
| 29 | assert(recvbuf[i] == 1.0*i);
|
|---|
| 30 | }
|
|---|
| 31 | free(recvbuf);
|
|---|
| 32 | MPI_Finalize();
|
|---|
| 33 | }
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
