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/*
* Copyright (c) 2011 Ken McDonell. All Rights Reserved.
*
* exercise multi-threaded multiple host contexts with pmLookupDesc()
* as the simplest possible case
*/
#include <stdio.h>
#include <stdlib.h>
#include <pcp/pmapi.h>
#include <pcp/impl.h>
#include <pthread.h>
#ifndef HAVE_PTHREAD_BARRIER_T
#include "pthread_barrier.h"
#endif
#define NMETRIC 5
static char *namelist[NMETRIC] = {
"sample.seconds",
"sampledso.milliseconds",
"sample.ulonglong.bin_ctr",
"pmcd.cputime.total",
"pmcd.buf.alloc",
};
static pmID pmidlist[NMETRIC];
static pthread_barrier_t barrier;
static int ctx1;
static int ctx2;
static int ctx3;
static void
foo(FILE *f, char *fn, int i)
{
pmDesc desc;
char strbuf[60];
int sts;
sts = pmLookupDesc(pmidlist[i], &desc);
if (sts < 0) {
fprintf(f, "%s: pmLookupDesc[%s] -> %s\n", fn, pmIDStr_r(pmidlist[i], strbuf, sizeof(strbuf)), pmErrStr(sts));
pthread_exit("botch");
}
else if (pmidlist[i] != desc.pmid) {
fprintf(f, "%s: pmLookupDesc: Expecting PMID: %s", fn, pmIDStr_r(pmidlist[i], strbuf, sizeof(strbuf)));
fprintf(f, " got: %s\n", pmIDStr_r(desc.pmid, strbuf, sizeof(strbuf)));
pthread_exit("botch");
}
else {
fprintf(f, "%s: %s (%s) ->", fn, namelist[i], pmIDStr_r(pmidlist[i], strbuf, sizeof(strbuf)));
fprintf(f, " %s", pmTypeStr_r(desc.type, strbuf, sizeof(strbuf)));
fprintf(f, " %s", pmInDomStr_r(desc.indom, strbuf, sizeof(strbuf)));
if (desc.sem == PM_SEM_COUNTER) fprintf(f, " counter");
else if (desc.sem == PM_SEM_INSTANT) fprintf(f, " instant");
else if (desc.sem == PM_SEM_DISCRETE) fprintf(f, " discrete");
else fprintf(f, " sem-%d", desc.sem);
fprintf(f, " %s\n", pmUnitsStr_r(&desc.units, strbuf, sizeof(strbuf)));
}
}
static void *
func1(void *arg)
{
char *fn = "func1";
int i;
int j;
FILE *f;
if ((f = fopen("/tmp/func1.out", "w")) == NULL) {
perror("func1 fopen");
pthread_exit("botch");
}
j = pmUseContext(ctx1);
if (j < 0) {
fprintf(f, "Error: %s: pmUseContext(%d) -> %s\n", fn, ctx1, pmErrStr(j));
fclose(f);
pthread_exit("botch");
}
pthread_barrier_wait(&barrier);
for (j = 0; j < 100; j++) {
for (i = 0; i < NMETRIC; i++)
foo(f, fn, i);
}
fclose(f);
pthread_exit(NULL);
}
static void *
func2(void *arg)
{
char *fn = "func2";
int i;
int j;
FILE *f;
if ((f = fopen("/tmp/func2.out", "w")) == NULL) {
perror("func2 fopen");
pthread_exit("botch");
}
j = pmUseContext(ctx2);
if ( j < 0) {
fprintf(f, "Error: %s: pmUseContext(%d) -> %s\n", fn, ctx2, pmErrStr(j));
fclose(f);
pthread_exit("botch");
}
pthread_barrier_wait(&barrier);
for (j = 0; j < 100; j++) {
for (i = NMETRIC-1; i >= 0; i--)
foo(f, fn, i);
}
fclose(f);
pthread_exit(NULL);
}
static void *
func3(void *arg)
{
char *fn = "func3";
int i;
int j;
FILE *f;
if ((f = fopen("/tmp/func3.out", "w")) == NULL) {
perror("func3 fopen");
pthread_exit("botch");
}
j = pmUseContext(ctx3);
if ( j < 0) {
fprintf(f, "Error: %s: pmUseContext(%d) -> %s\n", fn, ctx3, pmErrStr(j));
fclose(f);
pthread_exit("botch");
}
pthread_barrier_wait(&barrier);
for (j = 0; j < 100; j++) {
for (i = 0; i < NMETRIC; i += 2)
foo(f, fn, i);
for (i = 1; i < NMETRIC; i += 2)
foo(f, fn, i);
}
fclose(f);
pthread_exit(NULL);
}
int
main(int argc, char **argv)
{
pthread_t tid1;
pthread_t tid2;
pthread_t tid3;
int sts;
char *msg;
int errflag = 0;
int c;
__pmSetProgname(argv[0]);
while ((c = getopt(argc, argv, "D:")) != EOF) {
switch (c) {
case 'D': /* debug flag */
sts = __pmParseDebug(optarg);
if (sts < 0) {
fprintf(stderr, "%s: unrecognized debug flag specification (%s)\n",
pmProgname, optarg);
errflag++;
}
else
pmDebug |= sts;
break;
case '?':
default:
errflag++;
break;
}
}
if (errflag || optind == argc || argc-optind > 3) {
fprintf(stderr, "Usage: %s [-D...] host1 [host2 [host3]]\n", pmProgname);
exit(1);
}
ctx1 = pmNewContext(PM_CONTEXT_HOST, argv[optind]);
if (ctx1 < 0) {
printf("Error: pmNewContext(%s) -> %s\n", argv[optind], pmErrStr(ctx1));
exit(1);
}
optind++;
if (optind < argc) {
ctx2 = pmNewContext(PM_CONTEXT_HOST, argv[optind]);
if (ctx2 < 0) {
printf("Error: pmNewContext(%s) -> %s\n", argv[optind], pmErrStr(ctx2));
exit(1);
}
optind++;
}
else
ctx2 = ctx1;
if (optind < argc) {
ctx3 = pmNewContext(PM_CONTEXT_HOST, argv[optind]);
if (ctx3 < 0) {
printf("Error: pmNewContext(%s) -> %s\n", argv[optind], pmErrStr(ctx2));
exit(1);
}
optind++;
}
else
ctx3 = ctx2;
sts = pmLookupName(NMETRIC, namelist, pmidlist);
if (sts != NMETRIC) {
int i;
printf("Error: pmLookupName -> %s\n", pmErrStr(sts));
for (i = 0; i < NMETRIC; i++) {
printf(" %s -> %s\n", namelist[i], pmIDStr(pmidlist[i]));
}
exit(1);
}
sts = pthread_barrier_init(&barrier, NULL, 3);
if (sts != 0) {
printf("pthread_barrier_init: sts=%d\n", sts);
exit(1);
}
sts = pthread_create(&tid1, NULL, func1, NULL);
if (sts != 0) {
printf("thread_create: tid1: sts=%d\n", sts);
exit(1);
}
sts = pthread_create(&tid2, NULL, func2, NULL);
if (sts != 0) {
printf("thread_create: tid2: sts=%d\n", sts);
exit(1);
}
sts = pthread_create(&tid3, NULL, func3, NULL);
if (sts != 0) {
printf("thread_create: tid3: sts=%d\n", sts);
exit(1);
}
pthread_join(tid1, (void *)&msg);
if (msg != NULL) printf("tid1: %s\n", msg);
pthread_join(tid2, (void *)&msg);
if (msg != NULL) printf("tid2: %s\n", msg);
pthread_join(tid3, (void *)&msg);
if (msg != NULL) printf("tid3: %s\n", msg);
pthread_cancel(tid1);
pthread_cancel(tid2);
pthread_cancel(tid3);
exit(0);
}
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