83 строки
2.6 KiB
C
83 строки
2.6 KiB
C
#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string.h>
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#include <mpi.h>
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int main(int argc, char* argv[])
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{
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int msg, rc;
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MPI_Comm child;
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MPI_Info info;
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int rank, size;
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pid_t pid;
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char *cellhost, *ptr, *app;
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char hostname[128];
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pid = getpid();
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printf("Cell_spawn [pid %ld] starting up!\n", (long)pid);
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MPI_Init(NULL, NULL);
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MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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MPI_Comm_size(MPI_COMM_WORLD, &size);
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/* get our hostname */
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gethostname(hostname, 128);
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/* construct the name of our cell co-processor - for now, pick the "b" side */
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if (NULL != (ptr = strchr(hostname, '.'))) {
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/* truncate the name */
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*ptr = '\0';
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}
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cellhost = strdup(hostname);
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cellhost[strlen(cellhost)-1] = 'b';
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printf("Master on host %s is spawning cell slave on host %s\n", hostname, cellhost);
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MPI_Info_create(&info);
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MPI_Info_set(info, "host", cellhost);
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/* setup the prefix to point to the special packages area */
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MPI_Info_set(info, "ompi_prefix", "/usr/projects/packages/openmpi/rhc/opt/slave");
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/* declare this to be a local slave launch */
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MPI_Info_set(info, "ompi_local_slave", "true");
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/* at this time, we don't need to preload binaries as we cannot
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* cross-compile OMPI programs. However, if you want to compile
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* your program on a Cell, and then move it to the NFS server
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* for later use, then turn the following lines on and indicate
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* where you want the binary placed
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*/
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#if 0
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MPI_Info_set(info, "ompi_preload_binary", "true");
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MPI_Info_set(info, "ompi_preload_files_dest_dir", rdir);
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MPI_Info_set(info, "ompi_preload_files", list-of-files);
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MPI_Info_set(info, "ompi_preload_files_src_dir", getcwd(cwd, 256));
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#endif
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app = strdup("/usr/projects/packages/openmpi/rhc/cell_slave");
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pid = getpid();
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printf("Cell_spawn [pid %ld] about to spawn!\n", (long)pid);
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if (MPI_SUCCESS != (rc = MPI_Comm_spawn(app, MPI_ARGV_NULL, 1, info,
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0, MPI_COMM_WORLD, &child, MPI_ERRCODES_IGNORE))) {
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printf("Cell slave failed to spawn\n");
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return rc;
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}
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printf("Cell_spawn done with spawn\n");
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if (0 == rank) {
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msg = 38;
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printf("Cell_spawn sending message to child\n");
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MPI_Send(&msg, 1, MPI_INT, 0, 1, child);
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}
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MPI_Comm_disconnect(&child);
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printf("Cell_spawn disconnected\n");
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MPI_Info_free(&info);
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MPI_Finalize();
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fprintf(stderr, "%d: exiting\n", pid);
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return 0;
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}
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