/usr/share/pcp/demos/pmclient/pmclient_fg.c is in pcp 4.0.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* pmclient_fg - sample, simpler PMAPI/fetchgroup client
*
* Copyright (c) 2013-2015 Red Hat.
* Copyright (c) 1995-2002 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.
*/
#include "pmapi.h"
#include "libpcp.h"
#include <assert.h>
pmLongOptions longopts[] = {
PMAPI_GENERAL_OPTIONS,
PMAPI_OPTIONS_HEADER("Reporting options"),
{ "pause", 0, 'P', 0, "pause between updates for archive replay" },
PMAPI_OPTIONS_END
};
pmOptions opts = {
.flags = PM_OPTFLAG_STDOUT_TZ | PM_OPTFLAG_BOUNDARIES,
.short_options = PMAPI_OPTIONS "P",
.long_options = longopts,
};
typedef struct {
struct timeval timestamp; /* last fetched time */
double cpu_util; /* aggregate CPU utilization, usr+sys */
int peak_cpu; /* most utilized CPU, if > 1 CPU */
double peak_cpu_util; /* utilization for most utilized CPU */
pmAtomValue freemem; /* free memory (Mbytes) */
pmAtomValue dkiops; /* aggregate disk I/O's per second */
pmAtomValue load1; /* 1 minute load average */
pmAtomValue load15; /* 15 minute load average */
pmAtomValue ncpu; /* number of cpus */
unsigned int last_ncpu; /* last seen number of cpus */
} info_t;
static info_t info;
static pmFG pmfg;
static void
get_sample(void)
{
enum { indom_maxnum = 1024 };
static int cpu_user_inst[indom_maxnum];
static pmAtomValue cpu_user[indom_maxnum];
static unsigned num_cpu_user;
static int cpu_sys_inst[indom_maxnum];
static pmAtomValue cpu_sys[indom_maxnum];
static unsigned num_cpu_sys;
static int setup;
int sts;
int i;
if (!setup) {
setup = 1;
if ((sts = pmExtendFetchGroup_item(pmfg, "hinv.ncpu", NULL, NULL,
&info.ncpu, PM_TYPE_32, &sts)) < 0) {
fprintf(stderr, "%s: Failed hinv.ncpu ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
/*
* Because of pmfg_item's willingness to scan to the end of an
* archive to do metric/instance resolution, we don't have to
* specially handle the PM_CONTEXT_ARCHIVE case here.
*/
if ((sts = pmExtendFetchGroup_item(pmfg,
"kernel.all.load", "1 minute", NULL,
&info.load1, PM_TYPE_DOUBLE, NULL)) < 0) {
fprintf(stderr, "%s: Failed kernel.all.load[1] "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_item(pmfg,
"kernel.all.load", "15 minute", NULL,
&info.load15, PM_TYPE_DOUBLE, NULL)) < 0) {
fprintf(stderr, "%s: Failed kernel.all.load[15] "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_indom(pmfg,
"kernel.percpu.cpu.user", "second/second",
cpu_user_inst, NULL, cpu_user, PM_TYPE_DOUBLE,
NULL, indom_maxnum, &num_cpu_user, NULL)) < 0) {
fprintf(stderr, "%s: Failed kernel.percpu.cpu.user "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_indom(pmfg,
"kernel.percpu.cpu.sys", "second/second",
cpu_sys_inst, NULL, cpu_sys, PM_TYPE_DOUBLE,
NULL, indom_maxnum, &num_cpu_sys, NULL)) < 0) {
fprintf(stderr, "%s: Failed kernel.percpu.cpu.sys "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_item(pmfg,
"mem.freemem", NULL, "Mbyte",
&info.freemem, PM_TYPE_DOUBLE, NULL)) < 0) {
fprintf(stderr, "%s: Failed mem.freemem "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_item(pmfg,
"disk.all.total", NULL, "count/second",
&info.dkiops, PM_TYPE_32, NULL)) < 0) {
fprintf(stderr, "%s: Failed disk.all.total "
"ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
if ((sts = pmExtendFetchGroup_timestamp(pmfg, &info.timestamp)) < 0) {
fprintf(stderr, "%s: Failed ExtendFetchGroup: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
/*
* Since we don't have a "last" call, we will have some
* some memory at exit, namely the cpu_sys and cpu_user
* arrays, and the object hiding behind pmfg.
*/
}
/*
* Fetch the current metrics; fill many info.* fields. Since we
* passed NULLs to most fetchgroup status int*'s, we'll get
* PM_TYPE_DOUBLE fetch/conversion errors represented by NaN's.
*/
sts = pmFetchGroup(pmfg);
if (sts < 0) {
fprintf(stderr, "%s: pmFetchGroup: %s\n", pmGetProgname(), pmErrStr(sts));
exit(1);
}
/* compute rate-converted values */
info.cpu_util = 0;
info.peak_cpu_util = -1; /* force re-assignment at first CPU */
/*
* Safely assume that the cpu_user and cpu_sys indoms are identical
* and that each has a corresponding set of values, so we zip them
* up pairwise with one iteration and no auxiliary data structures.
*/
assert(num_cpu_user == num_cpu_sys);
for (i = 0; i < num_cpu_user; i++) {
double util;
/* corresponding instances */
assert(cpu_user_inst[i] == cpu_sys_inst[i]);
util = cpu_user[i].d + cpu_sys[i].d; /* already rate-converted */
if (util > 1.0)
/* small errors are possible, so clip the utilization at 1.0 */
util = 1.0;
info.cpu_util += util;
if (util > info.peak_cpu_util) {
info.peak_cpu_util = util;
/* NB: i is indom instance, not result index */
info.peak_cpu = cpu_user_inst[i];
}
}
assert(info.ncpu.l != 0);
info.cpu_util /= info.ncpu.l;
}
int
main(int argc, char **argv)
{
int c;
int sts;
int samples;
int pauseFlag = 0;
int lines = 0;
char *source;
const char *host;
char timebuf[26]; /* for pmCtime result */
setlinebuf(stdout);
while ((c = pmGetOptions(argc, argv, &opts)) != EOF) {
switch (c) {
case 'P':
pauseFlag++;
break;
default:
opts.errors++;
break;
}
}
if (pauseFlag && opts.context != PM_CONTEXT_ARCHIVE) {
pmprintf("%s: pause can only be used with archives\n", pmGetProgname());
opts.errors++;
}
if (opts.errors || opts.optind < argc - 1) {
pmUsageMessage(&opts);
exit(1);
}
if (opts.context == PM_CONTEXT_ARCHIVE) {
source = opts.archives[0];
} else if (opts.context == PM_CONTEXT_HOST) {
source = opts.hosts[0];
} else {
opts.context = PM_CONTEXT_HOST;
source = "local:";
}
sts = pmCreateFetchGroup(& pmfg, opts.context, source);
if (sts < 0) {
if (opts.context == PM_CONTEXT_HOST)
fprintf(stderr, "%s: Cannot connect to PMCD on host \"%s\": %s\n",
pmGetProgname(), source, pmErrStr(sts));
else
fprintf(stderr, "%s: Cannot open archive \"%s\": %s\n",
pmGetProgname(), source, pmErrStr(sts));
exit(1);
}
c = pmGetFetchGroupContext(pmfg);
/* complete TZ and time window option (origin) setup */
if (pmGetContextOptions(c, &opts)) {
pmflush();
exit(1);
}
host = pmGetContextHostName(c);
/* set a default sampling interval if none has been requested */
if (opts.interval.tv_sec == 0 && opts.interval.tv_usec == 0)
opts.interval.tv_sec = 5;
if (opts.context == PM_CONTEXT_ARCHIVE) {
if ((sts = pmSetMode(PM_MODE_INTERP, &opts.start, (int)(opts.interval.tv_sec*1000 + opts.interval.tv_usec/1000))) < 0) {
fprintf(stderr, "%s: pmSetMode failed: %s\n",
pmGetProgname(), pmErrStr(sts));
exit(1);
}
}
if (opts.context == PM_CONTEXT_ARCHIVE)
get_sample(); /* fetch the separate early ncpu record */
get_sample(); /* fetch other rate metrics */
/* set sampling loop termination via the command line options */
samples = opts.samples ? opts.samples : -1;
while (samples == -1 || samples-- > 0) {
if (lines % 15 == 0) {
time_t now = info.timestamp.tv_sec;
if (opts.context == PM_CONTEXT_ARCHIVE)
printf("Archive: %s, ", opts.archives[0]);
printf("Host: %s, %d cpu(s), %s",
host, info.ncpu.l,
pmCtime(&now, timebuf));
/* - report format
CPU Busy Busy Free Mem Disk Load Average
Util CPU Util (Mbytes) IOPS 1 Min 15 Min
X.XXX XXX X.XXX XXXXX.XXX XXXXXX XXXX.XX XXXX.XX
*/
printf(" CPU");
if (info.ncpu.l > 1)
printf(" Busy Busy");
printf(" Free Mem Disk Load Average\n");
printf(" Util");
if (info.ncpu.l > 1)
printf(" CPU Util");
printf(" (Mbytes) IOPS 1 Min 15 Min\n");
}
if (opts.context != PM_CONTEXT_ARCHIVE || pauseFlag)
__pmtimevalSleep(opts.interval);
get_sample();
printf("%5.2f", info.cpu_util);
if (info.ncpu.l > 1)
printf(" %3d %5.2f", info.peak_cpu, info.peak_cpu_util);
printf(" %9.3f", info.freemem.d);
printf(" %6d", info.dkiops.l);
printf(" %7.2f %7.2f\n", info.load1.d, info.load15.d);
lines++;
}
exit(0);
}
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