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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include "mpi.h"
#include "openmx_common.h"
#define asize1 10
#define asize2 8
#define asize3 4
int main(int argc, char *argv[])
{
int numprocs,myid,ID,count,tag,i,j,k;
int numprocs0,myid0;
int ID0,vsize0;
double *v0;
MPI_Status stat;
MPI_Request request;
int Pnum[10];
Pnum[0] = 4;
Pnum[1] = 8;
Pnum[2] = 3;
Pnum[3] = 2;
Pnum[4] = 7;
Pnum[5] = 3;
mpi_comm_level1 = MPI_COMM_WORLD;
MPI_Init(&argc,&argv);
MPI_Comm_size(mpi_comm_level1,&numprocs0);
MPI_Comm_rank(mpi_comm_level1,&myid0);
printf("numprocs0=%2d myid0=%2d\n",numprocs0,myid0);
for (k=0; k<6; k++){
/* make a new group */
if (Pnum[k]<numprocs0){
int *new_ranks;
MPI_Group new_group,old_group;
new_ranks = (int*)malloc(sizeof(int)*Pnum[k]);
for (i=0; i<Pnum[k]; i++) {
new_ranks[i]=i; /* a new group is made of original rank=0:Pnum[k]-1 */
}
MPI_Comm_group(MPI_COMM_WORLD, &old_group);
/* define a new group */
MPI_Group_incl(old_group,Pnum[k],new_ranks,&new_group);
MPI_Comm_create(MPI_COMM_WORLD,new_group,&mpi_comm_level1);
free(new_ranks); /* never forget cleaning! */
}
if (myid0<Pnum[k]){
MPI_Comm_size(mpi_comm_level1,&numprocs);
MPI_Comm_rank(mpi_comm_level1,&myid);
printf("B k=%3d numprocs=%3d myid=%3d\n",k,numprocs,myid);
}
printf("A k=%3d numprocs=%3d myid=%3d\n",k,numprocs0,myid0);
/* return original */
{
int *new_ranks;
MPI_Group new_group,old_group;
new_ranks = (int*)malloc(sizeof(int)*numprocs0);
for (i=0; i<numprocs0; i++) {
new_ranks[i]=i; /* a new group is made of original rank=0:Pnum[k]-1 */
}
MPI_Comm_group(MPI_COMM_WORLD, &old_group);
/* define a new group */
MPI_Group_incl(old_group,numprocs0,new_ranks,&new_group);
MPI_Comm_create(MPI_COMM_WORLD,new_group,&mpi_comm_level1);
free(new_ranks); /* never forget cleaning! */
}
}
MPI_Finalize();
exit(0);
return 3;
}
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