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static char rcsid[] =
"$Id: thb.c,v 1.2 1997/07/09 13:28:01 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.
*/
/*
Join a bunch of groups and do some barriers
*/
#include <stdio.h>
#include "pvm3.h"
#define MAXGNAME 32 /* used to be a constant, length not important */
#define MAXGTIDS 32 /* used to be a constant, Number not important */
#define MAXNGROUPS 32 /* used to be constant, Number not important */
int
main(argc, argv)
int argc;
char *argv[];
{
int mytid, ctid[MAXGTIDS];
int nproc;
char g[MAXGNAME];
int cc;
int gid[MAXNGROUPS], gs;
int i;
if (argc != 2) goto usage;
if ((nproc = atoi(argv[1])) < 1) goto usage;
mytid = pvm_mytid();
if (mytid < 0) {
pvm_perror(argv[0]);
return -1;
}
/* join a bunch of groups */
for (i = 0; i < MAXNGROUPS; i++) {
sprintf(g, "group%d", i);
if((gid[i] = pvm_joingroup(g)) < 0) {
pvm_perror("joining");
}
fprintf(stderr, "joined %s\n", g);
}
/* test that i'm in the groups */
for (i = MAXNGROUPS-1; i >= 0; i--) {
sprintf(g, "group%d", i);
if(gid[i] != (cc = pvm_getinst(g, mytid))) {
fprintf(stderr, "I'm not myself %d %s\n", cc, g);
pvm_perror("getinst");
}
if(mytid != (cc = pvm_gettid(g, gid[i]))) {
fprintf(stderr, "I'm not myself %d %s\n", cc, g);
pvm_perror("gettid");
}
}
/* start a bunch of children */
printf("spawning ... ");
pvm_spawn("tnb", (char**)0, 0, "", nproc, ctid);
for (i = 0; i < nproc; i++) {
if (ctid[i] < 0) {
fprintf(stderr, "trouble on spawn number %d\n", ctid[i]);
pvm_perror("th:");
}
else {
int foo;
foo = nproc+1;
/* send a group name to the child */
pvm_initsend(PvmDataDefault);
pvm_pkstr(g);
pvm_pkint(&foo, 1, 1);
pvm_send(ctid[i], 5);
}
}
printf ("barrier on %s \n", g);
pvm_barrier(g, nproc+1);
pvm_initsend(PvmDataDefault);
pvm_bcast(g, 77);
printf(" leaving all the groups \n");
/* leave the groups */
for (i = 0; i < MAXNGROUPS; i++) {
sprintf(g, "group%d", i);
if(pvm_lvgroup(g) < 0)
pvm_perror("pvm_lvgroup");
}
pvm_exit();
printf("done.\n");
return 0;
usage:
fprintf(stderr, "usage: %s <nproc>\n", argv[0]);
}
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