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static char rcsid[] =
"$Id: ge.c,v 1.2 1997/07/09 13:27:56 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.
*/
/*
Typical group example
20 Mar 1993, modified example to reflect change in pvm_bcast()
*/
#include <stdio.h>
#include "pvm3.h"
int
main(argc, argv)
int argc;
char *argv[];
{
int mytid, mygid, ctid[32];
int nproc, i, indx;
int cc;
mytid = pvm_mytid();
fprintf(stderr, "%s 0x%x enrolled\n", "ge", mytid);
if (mytid < 0) {
pvm_perror(argv[0]);
return -1;
}
if (pvm_parent() == PvmNoParent) {
if (argc != 2) goto usage;
if ((nproc = atoi(argv[1])) < 0) goto usage;
if (nproc > 32) goto usage;
}
/* join a group */
mygid = pvm_joingroup("ge");
fprintf(stderr, "%s 0x%x %d\n", "ge", mytid, mygid);
/* if I'm the first to join then start the others */
if (mygid == 0) {
/* start a bunch of children */
if ((nproc-1) != pvm_spawn(argv[0], (char**) 0, 0, "", nproc-1, ctid))
pvm_perror("spawn1");
/* check them */
for (i = 0; i < nproc-1; i++)
fprintf(stderr, "0x%x\n", ctid[i]);
/* tell them how many sibs */
pvm_initsend(PvmDataDefault);
pvm_pkint(&nproc, 1, 1);
pvm_mcast(ctid, nproc-1, 15);
}
else {
/* find out the number of sibs */
pvm_recv(pvm_parent(), 15);
pvm_upkint(&nproc, 1, 1);
fprintf(stderr,"nproc %d\n",nproc);
}
/* sync on a barrier */
if (pvm_barrier("ge", nproc) < 0) {
pvm_perror("barrier");
pvm_lvgroup("ge");
pvm_exit();
return -1;
}
fprintf(stderr, "group %s size %d gid %d: sync\n", "ge",
pvm_gsize("ge"), mygid);
/* everyone broadcast their gids and tids */
pvm_initsend(PvmDataDefault);
pvm_pkint(&mygid, 1, 1);
pvm_pkint(&mytid, 1, 1);
pvm_bcast("ge", 63);
/* recv all the gids and tids (except from myself) */
for (i = 0; i < nproc-1; i++) {
pvm_recv(-1, 63);
pvm_upkint(&indx, 1, 1);
pvm_upkint(ctid+indx, 1, 1);
}
/* set my tid too */
ctid[mygid] = mytid;
/* check to make sure the gids and tids are correct */
for (i = 0; i < nproc; i++) {
if (i != pvm_getinst("ge", ctid[i])) {
fprintf(stderr, "gid %d doesn't match up!\n", i);
}
if (ctid[i] != pvm_gettid("ge", i)) {
fprintf(stderr, "gid %d doesn't match up!\n", i);
}
}
/* leave the group */
if(pvm_lvgroup("ge") < 0)
pvm_perror("leave");
pvm_exit();
printf("done\n");
return 0;
usage:
pvm_exit();
fprintf(stderr, "usage: %s <nproc>\n", argv[0]);
return -1;
}
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