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/*
* Copyright (c) 1997 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* app2.c
*
* Sample program to demonstrate use of the PCP trace performance metrics
* domain agent (PMDA(3)). This agent needs to be installed before metrics
* can be made available via the performance metrics namespace (PMNS(4)),
* and the Performance Metrics Collector Daemon (PMCD(1)).
*
* Once this program is running, the trace PMDA metrics & instances can be
* viewed through PCP monitor tools such as pmchart(1), pmgadgets(1), and
* pmview(1). To view the help text associated with each of these metrics,
* use:
* $ pminfo -tT trace
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#include <pcp/trace.h>
#define IO_UPPER_LIMIT 1000 /* I/O ops */
#define CPU_UPPER_LIMIT 0xffff /* iterations */
#define TIME_UPPER_LIMIT 10 /* seconds */
static void io_sucker(void);
static void cpu_sucker(void);
static void time_sucker(void);
static char *prog;
int
main(int argc, char **argv)
{
int i, sts;
prog = argv[0];
srand48(time(0));
/* uncomment this for debugging information */
/* pmtracestate(PMTRACE_STATE_API|PMTRACE_STATE_COMMS|PMTRACE_STATE_PDU); */
/* uncomment this to use the asynchronous protocol */
/* pmtracestate(PMTRACE_STATE_ASYNC); */
for (i = 0;; i++) {
if ((sts = pmtracepoint("mainloop")) < 0) {
fprintf(stderr, "%s: mainloop point trace failed (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
exit(1);
}
switch(i % 3) {
case 0:
time_sucker();
break;
case 1:
io_sucker();
break;
case 2:
cpu_sucker();
break;
}
}
}
static void
cpu_sucker(void)
{
int i, j, sts;
double array[100];
long iterations;
if ((sts = pmtracebegin("cpu_sucker")) < 0) {
fprintf(stderr, "%s: cpu_sucker begin (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
iterations = lrand48() % CPU_UPPER_LIMIT;
memset((void *)array, 0, 100*sizeof(double));
for (i = 0; i < iterations; i++)
for (j = 0; j < 100; j++)
array[j] = (double)(j*iterations);
if ((sts = pmtraceend("cpu_sucker")) < 0) {
fprintf(stderr, "%s: cpu_sucker end (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
}
static void
time_sucker(void)
{
long seconds;
int sts;
if ((sts = pmtracebegin("time_sucker")) < 0) {
fprintf(stderr, "%s: time_sucker start (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
seconds = lrand48() % TIME_UPPER_LIMIT;
sleep((unsigned int)seconds);
if ((sts = pmtraceend("time_sucker")) < 0) {
fprintf(stderr, "%s: time_sucker end (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
}
static void
io_sucker(void)
{
long characters;
FILE *foo;
int i, sts;
if ((sts = pmtracebegin("io_sucker")) < 0) {
fprintf(stderr, "%s: io_sucker start (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
if ((foo = fopen("/dev/null", "rw")) == NULL) {
fprintf(stderr, "%s: io_sucker can't open /dev/null.\n", prog);
return;
}
characters = lrand48() % IO_UPPER_LIMIT;
for (i = 0; i < characters; i++) {
fgetc(foo);
fputc('!', foo);
}
fclose(foo);
if ((sts = pmtraceend("io_sucker")) < 0) {
fprintf(stderr, "%s: io_sucker end (%d): %s\n",
prog, sts, pmtraceerrstr(sts));
return;
}
}
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