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static char rcsid[] =
"$Id: gs.c,v 1.3 1997/08/11 14:39:18 pvmsrc Exp $";
/*
* PVM version 3.4: Parallel Virtual Machine System
* University of Tennessee, Knoxville TN.
* Oak Ridge National Laboratory, Oak Ridge TN.
* Emory University, Atlanta GA.
* Authors: J. J. Dongarra, G. E. Fagg, M. Fischer
* G. A. Geist, J. A. Kohl, R. J. Manchek, P. Mucci,
* P. M. Papadopoulos, S. L. Scott, and V. S. Sunderam
* (C) 1997 All Rights Reserved
*
* NOTICE
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted
* provided that the above copyright notice appear in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* Neither the Institutions (Emory University, Oak Ridge National
* Laboratory, and University of Tennessee) nor the Authors make any
* representations about the suitability of this software for any
* purpose. This software is provided ``as is'' without express or
* implied warranty.
*
* PVM version 3 was funded in part by the U.S. Department of Energy,
* the National Science Foundation and the State of Tennessee.
*/
/*
Using pvm_gsize()
*/
#include <stdio.h>
#include "pvm3.h"
#define GSGROUP "gsgroup"
int
main(argc, argv)
int argc;
char *argv[];
{
int mytid, mygid, ctid[32];
int nproc, i;
mytid = pvm_mytid();
fprintf(stderr, "%s 0x%x enrolled\n", argv[0], mytid);
if (mytid < 0) {
pvm_perror(argv[0]);
return -1;
}
if (argc != 2) goto usage;
if ((nproc = atoi(argv[1])) < 1) goto usage;
if (nproc > 32) goto usage;
/* join a group */
mygid = pvm_joingroup(GSGROUP);
/* if I'm the first to join then start the others */
if (mygid == 0) {
/* start a bunch of children */
pvm_spawn(argv[0], argv+1, 0, "", nproc-1, ctid);
/* check them */
for (i = 0; i < nproc-1; i++)
fprintf(stderr, "0x%x\n", ctid[i]);
}
while(pvm_gsize(GSGROUP) < nproc)
if (mygid == 0)
fputs("waiting on kids to join\n", stderr);
/* sync */
pvm_barrier(GSGROUP, nproc);
/* leave the group */
if(pvm_lvgroup(GSGROUP) < 0)
pvm_perror(argv[0]);
pvm_exit();
return 0;
usage:
fprintf(stderr, "usage: %s <nproc>\n", argv[0]);
return -1;
}
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