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static char rcsid[] =
"$Id: timing.c,v 1.5 2009/01/23 01:12:57 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.
*/
/*
* timing.c
*
* Does a few communication timing tests on pvm.
* Uses `timing_slave' to echo messages.
* ----------------------------------------------------------------------------
* If this test is run over machines with differnet data formats
* Then change 'ENCODING' to PvmDataDefault in timing and timing_slave
* ----------------------------------------------------------------------------
*
* 9 Dec 1991 Manchek
* 14 Oct 1992 Geist - revision to pvm3
* 6 Mar 1994 Geist - synch tasks and add direct route
*/
#include <stdio.h>
#ifdef HASSTDLIB
#include <stdlib.h>
#endif
#ifndef WIN32
#include <sys/time.h>
#endif
#include <time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <math.h>
#include "pvm3.h"
#define SLAVENAME "timing_slave"
#define ENCODING PvmDataRaw
main(argc, argv)
int argc;
char **argv;
{
int mytid; /* my task id */
int stid = 0; /* slave task id */
int reps = 20; /* number of samples per test */
struct timeval tv1, tv2; /* for timing */
int dt1, dt2; /* time for one iter */
int at1, at2; /* accum. time */
int numint; /* message length */
int n;
int i;
int *iarray = 0;
/* enroll in pvm */
if ((mytid = pvm_mytid()) < 0) {
exit(1);
}
printf("i'm t%x\n", mytid);
/* start up slave task */
if (pvm_spawn(SLAVENAME, (char**)0, 0, "", 1, &stid) < 0 || stid < 0) {
fputs("can't initiate slave\n", stderr);
goto bail;
}
/* Wait for slave task to start up */
pvm_setopt(PvmRoute, PvmRouteDirect);
pvm_recv( stid, 0 );
printf("slave is task t%x\n", stid);
/*
* round-trip timing test
*/
puts("Doing Round Trip test, minimal message size\n");
at1 = 0;
/* pack buffer */
pvm_initsend(ENCODING);
pvm_pkint(&stid, 1, 1);
puts(" N uSec");
for (n = 1; n <= reps; n++) {
gettimeofday(&tv1, (struct timezone*)0);
if (pvm_send(stid, 1)) {
fprintf(stderr, "can't send to \"%s\"\n", SLAVENAME);
goto bail;
}
if (pvm_recv(-1, -1) < 0) {
pvm_perror( "recv error" );
goto bail;
}
gettimeofday(&tv2, (struct timezone*)0);
dt1 = (tv2.tv_sec - tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec;
printf("%2d %8d\n", n, dt1);
at1 += dt1;
}
printf("RTT Avg uSec %d\n", at1 / reps);
/*
* bandwidth test for different message lengths
*/
puts("\nDoing Bandwidth tests\n");
for (numint = 25; numint < 1000000; numint *= 10) {
printf("\nMessage size %d\n", numint * 4);
at1 = at2 = 0;
iarray = (int*)malloc(numint * sizeof(int));
puts(" N Pack uSec Send uSec");
for (n = 1; n <= reps; n++) {
gettimeofday(&tv1, (struct timezone*)0);
pvm_initsend(ENCODING);
pvm_pkint(iarray, numint, 1);
gettimeofday(&tv2, (struct timezone*)0);
dt1 = (tv2.tv_sec - tv1.tv_sec) * 1000000
+ tv2.tv_usec - tv1.tv_usec;
gettimeofday(&tv1, (struct timezone*)0);
if (pvm_send(stid, 1)) {
fprintf(stderr, "can't send to \"%s\"\n", SLAVENAME);
goto bail;
}
if (pvm_recv(-1, -1) < 0) {
pvm_perror( "recv error" );
goto bail;
}
gettimeofday(&tv2, (struct timezone*)0);
dt2 = (tv2.tv_sec - tv1.tv_sec) * 1000000
+ tv2.tv_usec - tv1.tv_usec;
printf("%2d %8d %8d\n", n, dt1, dt2);
at1 += dt1;
at2 += dt2;
}
if (!(at1 /= reps))
at1 = 1;
if (!(at2 /= reps))
at2 = 1;
puts("Avg uSec");
printf(" %8d %8d\n", at1, at2);
puts("Avg Byte/uSec");
printf(" %8f %8f\n",
(numint * 4) / (double)at1,
(numint * 4) / (double)at2);
}
/* we have to do this because the last message might be taking
* up all the shared memory pages.
*/
pvm_freebuf(pvm_getsbuf());
puts("\ndone");
bail:
if (stid > 0)
pvm_kill(stid);
pvm_exit();
exit(1);
}
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