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/*
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a1973e |
* task_smpl_user.c - example of a task collecting a profile from user level
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a1973e |
*
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a1973e |
* Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
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a1973e |
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
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*
|
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a1973e |
* Permission is hereby granted, free of charge, to any person obtaining a copy
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a1973e |
* of this software and associated documentation files (the "Software"), to deal
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a1973e |
* in the Software without restriction, including without limitation the rights
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a1973e |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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a1973e |
* of the Software, and to permit persons to whom the Software is furnished to do so,
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a1973e |
* subject to the following conditions:
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a1973e |
*
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a1973e |
* The above copyright notice and this permission notice shall be included in all
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a1973e |
* copies or substantial portions of the Software.
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a1973e |
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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a1973e |
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
|
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a1973e |
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
|
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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a1973e |
*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <getopt.h>
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#include <time.h>
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <syscall.h>
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#include <perfmon/perfmon.h>
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#include <perfmon/pfmlib.h>
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#include "detect_pmcs.h"
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#define SAMPLING_PERIOD 100000
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#define NUM_PMCS PFMLIB_MAX_PMCS
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#define NUM_PMDS PFMLIB_MAX_PMDS
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|
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typedef struct {
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int opt_no_show;
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a1973e |
int opt_block;
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int opt_sys;
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a1973e |
} options_t;
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a1973e |
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static uint64_t collected_samples;
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static pfarg_pmd_t pd[NUM_PMDS];
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static unsigned int num_pmds;
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static options_t options;
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static volatile int terminate;
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a1973e |
|
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static struct option the_options[]={
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{ "help", 0, 0, 1},
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a1973e |
{ "ovfl-block", 0, &options.opt_block, 1},
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a1973e |
{ "no-show", 0, &options.opt_no_show, 1},
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{ "system-wide", 0, &options.opt_sys, 1},
|
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{ 0, 0, 0, 0}
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};
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a1973e |
|
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static void fatal_error(char *fmt,...) __attribute__((noreturn));
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a1973e |
|
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a1973e |
#define BPL (sizeof(uint64_t )<<3)
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#define LBPL 6
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a1973e |
|
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a1973e |
static inline void pfm_bv_set(uint64_t *bv, uint16_t rnum)
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a1973e |
{
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a1973e |
bv[rnum>>LBPL] |= 1UL << (rnum&(BPL-1));
|
|
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a1973e |
}
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a1973e |
|
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static inline int pfm_bv_isset(uint64_t *bv, uint16_t rnum)
|
|
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a1973e |
{
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|
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a1973e |
return bv[rnum>>LBPL] & (1UL <<(rnum&(BPL-1))) ? 1 : 0;
|
|
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a1973e |
}
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a1973e |
|
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a1973e |
static inline void pfm_bv_copy(uint64_t *d, uint64_t *j, uint16_t n)
|
|
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a1973e |
{
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|
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a1973e |
if (n <= BPL)
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|
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a1973e |
*d = *j;
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|
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a1973e |
else {
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|
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a1973e |
memcpy(d, j, (n>>LBPL)*sizeof(uint64_t));
|
|
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a1973e |
}
|
|
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a1973e |
}
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|
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a1973e |
|
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a1973e |
|
|
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a1973e |
/*
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|
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a1973e |
* pin task to CPU
|
|
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a1973e |
*/
|
|
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a1973e |
#ifndef __NR_sched_setaffinity
|
|
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a1973e |
#error "you need to define __NR_sched_setaffinity"
|
|
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a1973e |
#endif
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|
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a1973e |
|
|
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a1973e |
#define MAX_CPUS 2048
|
|
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a1973e |
#define NR_CPU_BITS (MAX_CPUS>>3)
|
|
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a1973e |
int
|
|
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a1973e |
pin_cpu(pid_t pid, unsigned int cpu)
|
|
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a1973e |
{
|
|
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a1973e |
uint64_t my_mask[NR_CPU_BITS];
|
|
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a1973e |
|
|
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a1973e |
if (cpu >= MAX_CPUS)
|
|
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a1973e |
fatal_error("this program supports only up to %d CPUs\n", MAX_CPUS);
|
|
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a1973e |
|
|
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a1973e |
my_mask[cpu>>6] = 1ULL << (cpu&63);
|
|
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a1973e |
|
|
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a1973e |
return syscall(__NR_sched_setaffinity, pid, sizeof(my_mask), &my_mask);
|
|
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a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
static void
|
|
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a1973e |
warning(char *fmt, ...)
|
|
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a1973e |
{
|
|
Packit Service |
a1973e |
va_list ap;
|
|
Packit Service |
a1973e |
|
|
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a1973e |
va_start(ap, fmt);
|
|
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a1973e |
vfprintf(stderr, fmt, ap);
|
|
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a1973e |
va_end(ap);
|
|
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a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
static void
|
|
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a1973e |
fatal_error(char *fmt, ...)
|
|
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a1973e |
{
|
|
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a1973e |
va_list ap;
|
|
Packit Service |
a1973e |
|
|
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a1973e |
va_start(ap, fmt);
|
|
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a1973e |
vfprintf(stderr, fmt, ap);
|
|
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a1973e |
va_end(ap);
|
|
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a1973e |
|
|
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a1973e |
exit(1);
|
|
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a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
int
|
|
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a1973e |
child(char **arg)
|
|
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a1973e |
{
|
|
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a1973e |
if (options.opt_sys) {
|
|
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a1973e |
printf("child pinned on CPU0\n");
|
|
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a1973e |
pin_cpu(getpid(), 0);
|
|
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a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
/*
|
|
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a1973e |
* force the task to stop before executing the first
|
|
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a1973e |
* user level instruction
|
|
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a1973e |
*/
|
|
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a1973e |
ptrace(PTRACE_TRACEME, 0, NULL, NULL);
|
|
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a1973e |
|
|
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a1973e |
execvp(arg[0], arg);
|
|
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a1973e |
/* not reached */
|
|
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a1973e |
exit(1);
|
|
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a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
void
|
|
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a1973e |
show_task_rusage(const struct timeval *start, const struct timeval *end, const struct rusage *ru)
|
|
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a1973e |
{
|
|
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a1973e |
long secs, suseconds, end_usec;
|
|
Packit Service |
a1973e |
|
|
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a1973e |
secs = end->tv_sec - start->tv_sec;
|
|
Packit Service |
a1973e |
end_usec = end->tv_usec;
|
|
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a1973e |
|
|
Packit Service |
a1973e |
if (end_usec < start->tv_usec) {
|
|
Packit Service |
a1973e |
end_usec += 1000000;
|
|
Packit Service |
a1973e |
secs--;
|
|
Packit Service |
a1973e |
}
|
|
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a1973e |
|
|
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a1973e |
suseconds = end_usec - start->tv_usec;
|
|
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a1973e |
|
|
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a1973e |
printf ("real %ldh%02ldm%02ld.%03lds user %ldh%02ldm%02ld.%03lds sys %ldh%02ldm%02ld.%03lds\n",
|
|
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a1973e |
secs / 3600,
|
|
Packit Service |
a1973e |
(secs % 3600) / 60,
|
|
Packit Service |
a1973e |
secs % 60,
|
|
Packit Service |
a1973e |
suseconds / 1000,
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
ru->ru_utime.tv_sec / 3600,
|
|
Packit Service |
a1973e |
(ru->ru_utime.tv_sec % 3600) / 60,
|
|
Packit Service |
a1973e |
ru->ru_utime.tv_sec% 60,
|
|
Packit Service |
a1973e |
(long)(ru->ru_utime.tv_usec / 1000),
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
ru->ru_stime.tv_sec / 3600,
|
|
Packit Service |
a1973e |
(ru->ru_stime.tv_sec % 3600) / 60,
|
|
Packit Service |
a1973e |
ru->ru_stime.tv_sec% 60,
|
|
Packit Service |
a1973e |
(long)(ru->ru_stime.tv_usec / 1000)
|
|
Packit Service |
a1973e |
);
|
|
Packit Service |
a1973e |
}
|
|
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a1973e |
static void
|
|
Packit Service |
a1973e |
process_sample(int fd, unsigned long ip, pid_t pid, pid_t tid, uint16_t cpu)
|
|
Packit Service |
a1973e |
{
|
|
Packit Service |
a1973e |
unsigned int j;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (pfm_read_pmds(fd, pd, num_pmds))
|
|
Packit Service |
a1973e |
fatal_error("pfm_read_pmds error errno %d\n",errno);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (options.opt_no_show) goto done;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
printf("entry %"PRIu64" PID:%d TID: %d CPU:%u LAST_VAL: %"PRIu64" IIP:0x%lx\n",
|
|
Packit Service |
a1973e |
collected_samples,
|
|
Packit Service |
a1973e |
pid,
|
|
Packit Service |
a1973e |
tid,
|
|
Packit Service |
a1973e |
cpu,
|
|
Packit Service |
a1973e |
- pd[0].reg_last_reset_val,
|
|
Packit Service |
a1973e |
ip);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
for(j=1; j < num_pmds; j++) {
|
|
Packit Service |
a1973e |
printf("PMD%-2d = %"PRIu64"\n", pd[j].reg_num, pd[j].reg_value);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
done:
|
|
Packit Service |
a1973e |
collected_samples++;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
static void
|
|
Packit Service |
a1973e |
cld_handler(int n)
|
|
Packit Service |
a1973e |
{
|
|
Packit Service |
a1973e |
terminate = 1;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
int
|
|
Packit Service |
a1973e |
mainloop(char **arg)
|
|
Packit Service |
a1973e |
{
|
|
Packit Service |
a1973e |
pfarg_ctx_t ctx;
|
|
Packit Service |
a1973e |
pfmlib_input_param_t inp;
|
|
Packit Service |
a1973e |
pfmlib_output_param_t outp;
|
|
Packit Service |
a1973e |
pfarg_pmc_t pc[NUM_PMCS];
|
|
Packit Service |
a1973e |
pfarg_load_t load_args;
|
|
Packit Service |
a1973e |
struct timeval start_time, end_time;
|
|
Packit Service |
a1973e |
struct rusage rusage;
|
|
Packit Service |
a1973e |
pfarg_msg_t msg;
|
|
Packit Service |
a1973e |
uint64_t ovfl_count = 0;
|
|
Packit Service |
a1973e |
pid_t pid;
|
|
Packit Service |
a1973e |
int status, ret, fd;
|
|
Packit Service |
a1973e |
unsigned int i, num_counters;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* intialize all locals
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
memset(&ctx, 0, sizeof(ctx));
|
|
Packit Service |
a1973e |
memset(&inp,0, sizeof(inp));
|
|
Packit Service |
a1973e |
memset(&outp,0, sizeof(outp));
|
|
Packit Service |
a1973e |
memset(pc, 0, sizeof(pc));
|
|
Packit Service |
a1973e |
memset(&load_args, 0, sizeof(load_args));
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
pfm_get_num_counters(&num_counters);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* locate events
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pfm_get_cycle_event(&inp.pfp_events[0]) != PFMLIB_SUCCESS)
|
|
Packit Service |
a1973e |
fatal_error("cannot find cycle event\n");
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (pfm_get_inst_retired_event(&inp.pfp_events[1]) != PFMLIB_SUCCESS)
|
|
Packit Service |
a1973e |
fatal_error("cannot find inst retired event\n");
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
i = 2;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* set the privilege mode:
|
|
Packit Service |
a1973e |
* PFM_PLM3 : user level
|
|
Packit Service |
a1973e |
* PFM_PLM0 : kernel level
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
inp.pfp_dfl_plm = PFM_PLM3;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
printf("measuring at plm=0x%x\n", inp.pfp_dfl_plm);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (i > num_counters) {
|
|
Packit Service |
a1973e |
i = num_counters;
|
|
Packit Service |
a1973e |
printf("too many events provided (max=%d events), using first %d event(s)\n", num_counters, i);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* how many counters we use
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
inp.pfp_event_count = i;
|
|
Packit Service |
a1973e |
inp.pfp_flags = options.opt_sys ? PFMLIB_PFP_SYSTEMWIDE : 0;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* build the pfp_unavail_pmcs bitmask by looking
|
|
Packit Service |
a1973e |
* at what perfmon has available. It is not always
|
|
Packit Service |
a1973e |
* the case that all PMU registers are actually available
|
|
Packit Service |
a1973e |
* to applications. For instance, on IA-32 platforms, some
|
|
Packit Service |
a1973e |
* registers may be reserved for the NMI watchdog timer.
|
|
Packit Service |
a1973e |
*
|
|
Packit Service |
a1973e |
* With this bitmap, the library knows which registers NOT to
|
|
Packit Service |
a1973e |
* use. Of source, it is possible that no valid assignement may
|
|
Packit Service |
a1973e |
* be possible if certina PMU registers are not available.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
detect_unavail_pmcs(-1, &inp.pfp_unavail_pmcs);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* let the library figure out the values for the PMCS
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if ((ret=pfm_dispatch_events(&inp, NULL, &outp, NULL)) != PFMLIB_SUCCESS)
|
|
Packit Service |
a1973e |
fatal_error("cannot configure events: %s\n", pfm_strerror(ret));
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* Now prepare the argument to initialize the PMDs and PMCS.
|
|
Packit Service |
a1973e |
* We use pfp_pmc_count to determine the number of PMC to intialize.
|
|
Packit Service |
a1973e |
* We use pfp_pmd_count to determine the number of PMD to initialize.
|
|
Packit Service |
a1973e |
* Some events/features may cause extra PMCs to be used, leading to:
|
|
Packit Service |
a1973e |
* - pfp_pmc_count may be >= pfp_event_count
|
|
Packit Service |
a1973e |
* - pfp_pmd_count may be >= pfp_event_count
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
for (i=0; i < outp.pfp_pmc_count; i++) {
|
|
Packit Service |
a1973e |
pc[i].reg_num = outp.pfp_pmcs[i].reg_num;
|
|
Packit Service |
a1973e |
pc[i].reg_value = outp.pfp_pmcs[i].reg_value;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
for (i=0; i < outp.pfp_pmd_count; i++) {
|
|
Packit Service |
a1973e |
pd[i].reg_num = outp.pfp_pmds[i].reg_num;
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* we also want to reset the other PMDs on
|
|
Packit Service |
a1973e |
* every overflow. If we do not set
|
|
Packit Service |
a1973e |
* this, the non-overflowed counters
|
|
Packit Service |
a1973e |
* will be untouched.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (i)
|
|
Packit Service |
a1973e |
pfm_bv_set(pd[0].reg_reset_pmds, pd[i].reg_num);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* we our sampling counter overflow, we want to be notified.
|
|
Packit Service |
a1973e |
* The notification will come ONLY when the sampling buffer
|
|
Packit Service |
a1973e |
* becomes full.
|
|
Packit Service |
a1973e |
*
|
|
Packit Service |
a1973e |
* We also activate randomization of the sampling period.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
pd[0].reg_flags |= PFM_REGFL_OVFL_NOTIFY | PFM_REGFL_RANDOM;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
pd[0].reg_value = - SAMPLING_PERIOD;
|
|
Packit Service |
a1973e |
pd[0].reg_short_reset = - SAMPLING_PERIOD;
|
|
Packit Service |
a1973e |
pd[0].reg_long_reset = - SAMPLING_PERIOD;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* setup randomization parameters, we allow a range of up to +256 here.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
pd[0].reg_random_seed = 5;
|
|
Packit Service |
a1973e |
pd[0].reg_random_mask = 0xff;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
printf("programming %u PMCS and %u PMDS\n", outp.pfp_pmc_count, inp.pfp_event_count);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* prepare context structure.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (options.opt_sys) {
|
|
Packit Service |
a1973e |
if (options.opt_block)
|
|
Packit Service |
a1973e |
fatal_error("blocking mode not supported in system-wide\n");
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
printf("system-wide monitoring on CPU0\n");
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
pin_cpu(getpid(), 0);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
ctx.ctx_flags |= PFM_FL_SYSTEM_WIDE;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (options.opt_block)
|
|
Packit Service |
a1973e |
ctx.ctx_flags |= PFM_FL_NOTIFY_BLOCK;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* now create our perfmon context.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
fd = pfm_create_context(&ctx, NULL, NULL, 0);
|
|
Packit Service |
a1973e |
if (fd == -1) {
|
|
Packit Service |
a1973e |
if (errno == ENOSYS) {
|
|
Packit Service |
a1973e |
fatal_error("Your kernel does not have performance monitoring support!\n");
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
fatal_error("Can't create PFM context %s\n", strerror(errno));
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* Now program the registers
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pfm_write_pmcs(fd, pc, outp.pfp_pmc_count))
|
|
Packit Service |
a1973e |
fatal_error("pfm_write_pmcs error errno %d\n",errno);
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* initialize the PMDs
|
|
Packit Service |
a1973e |
* To be read, each PMD must be either written or declared
|
|
Packit Service |
a1973e |
* as being part of a sample (reg_smpl_pmds)
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pfm_write_pmds(fd, pd, outp.pfp_pmd_count))
|
|
Packit Service |
a1973e |
fatal_error("pfm_write_pmds error errno %d\n",errno);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
num_pmds = outp.pfp_pmd_count;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
signal(SIGCHLD, SIG_IGN);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* Create the child task
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if ((pid=fork()) == -1)
|
|
Packit Service |
a1973e |
fatal_error("Cannot fork process\n");
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* In order to get the PFM_END_MSG message, it is important
|
|
Packit Service |
a1973e |
* to ensure that the child task does not inherit the file
|
|
Packit Service |
a1973e |
* descriptor of the context. By default, file descriptor
|
|
Packit Service |
a1973e |
* are inherited during exec(). We explicitely close it
|
|
Packit Service |
a1973e |
* here. We could have set it up through fcntl(FD_CLOEXEC)
|
|
Packit Service |
a1973e |
* to achieve the same thing.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pid == 0) {
|
|
Packit Service |
a1973e |
close(fd);
|
|
Packit Service |
a1973e |
child(arg);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* wait for the child to exec
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
waitpid(pid, &status, WUNTRACED);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* process is stopped at this point
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (WIFEXITED(status)) {
|
|
Packit Service |
a1973e |
warning("task %s [%d] exited already status %d\n", arg[0], pid, WEXITSTATUS(status));
|
|
Packit Service |
a1973e |
goto terminate_session;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* attach context to stopped task
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
load_args.load_pid = options.opt_sys ? getpid() : pid;
|
|
Packit Service |
a1973e |
if (pfm_load_context(fd, &load_args))
|
|
Packit Service |
a1973e |
fatal_error("pfm_load_context error errno %d\n",errno);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* activate monitoring for stopped task.
|
|
Packit Service |
a1973e |
* (nothing will be measured at this point
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pfm_start(fd, NULL))
|
|
Packit Service |
a1973e |
fatal_error("pfm_start error errno %d\n",errno);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
if (options.opt_sys)
|
|
Packit Service |
a1973e |
signal(SIGCHLD, cld_handler);
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* detach child. Side effect includes
|
|
Packit Service |
a1973e |
* activation of monitoring.
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
ptrace(PTRACE_DETACH, pid, NULL, 0);
|
|
Packit Service |
a1973e |
gettimeofday(&start_time, NULL);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* core loop
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
while(terminate == 0) {
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* wait for overflow/end notification messages
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
ret = read(fd, &msg, sizeof(msg));
|
|
Packit Service |
a1973e |
if (ret == -1) {
|
|
Packit Service |
a1973e |
if (errno != EINTR) fatal_error("cannot read perfmon msg: %s\n", strerror(errno));
|
|
Packit Service |
a1973e |
continue;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
switch(msg.type) {
|
|
Packit Service |
a1973e |
case PFM_MSG_OVFL: /* one sample to process */
|
|
Packit Service |
a1973e |
process_sample(fd, msg.pfm_ovfl_msg.msg_ovfl_ip,
|
|
Packit Service |
a1973e |
msg.pfm_ovfl_msg.msg_ovfl_pid,
|
|
Packit Service |
a1973e |
msg.pfm_ovfl_msg.msg_ovfl_tid,
|
|
Packit Service |
a1973e |
msg.pfm_ovfl_msg.msg_ovfl_cpu);
|
|
Packit Service |
a1973e |
ovfl_count++;
|
|
Packit Service |
a1973e |
if (pfm_restart(fd) == -1) {
|
|
Packit Service |
a1973e |
if (errno != EBUSY)
|
|
Packit Service |
a1973e |
fatal_error("pfm_restart error errno %d\n",errno);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
break;
|
|
Packit Service |
a1973e |
case PFM_MSG_END: /* monitored task terminated (not for system-wide) */
|
|
Packit Service |
a1973e |
printf("task terminated\n");
|
|
Packit Service |
a1973e |
terminate = 1;
|
|
Packit Service |
a1973e |
break;
|
|
Packit Service |
a1973e |
default: fatal_error("unknown message type %d\n", msg.type);
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
terminate_session:
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* cleanup child
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
wait4(pid, &status, 0, &rusage);
|
|
Packit Service |
a1973e |
gettimeofday(&end_time, NULL);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* destroy perfmon context
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
close(fd);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
printf("%"PRIu64" samples collected in %"PRIu64" buffer overflows\n", collected_samples, ovfl_count);
|
|
Packit Service |
a1973e |
show_task_rusage(&start_time, &end_time, &rusage);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
return 0;
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
static void
|
|
Packit Service |
a1973e |
usage(void)
|
|
Packit Service |
a1973e |
{
|
|
Packit Service |
a1973e |
printf("usage: task_smpl [-h] [--help] [--no-show] [--ovfl-block] cmd\n");
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
int
|
|
Packit Service |
a1973e |
main(int argc, char **argv)
|
|
Packit Service |
a1973e |
{
|
|
Packit Service |
a1973e |
pfmlib_options_t pfmlib_options;
|
|
Packit Service |
a1973e |
int c;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
while ((c=getopt_long(argc, argv,"h", the_options, 0)) != -1) {
|
|
Packit Service |
a1973e |
switch(c) {
|
|
Packit Service |
a1973e |
case 0: continue;
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
case 1:
|
|
Packit Service |
a1973e |
case 'h':
|
|
Packit Service |
a1973e |
usage();
|
|
Packit Service |
a1973e |
exit(0);
|
|
Packit Service |
a1973e |
default:
|
|
Packit Service |
a1973e |
fatal_error("");
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
if (argv[optind] == NULL) {
|
|
Packit Service |
a1973e |
fatal_error("You must specify a command to execute\n");
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* pass options to library (optional)
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
memset(&pfmlib_options, 0, sizeof(pfmlib_options));
|
|
Packit Service |
a1973e |
pfmlib_options.pfm_debug = 0; /* set to 1 for debug */
|
|
Packit Service |
a1973e |
pfmlib_options.pfm_verbose = 0; /* set to 1 for verbose */
|
|
Packit Service |
a1973e |
pfm_set_options(&pfmlib_options);
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
/*
|
|
Packit Service |
a1973e |
* Initialize pfm library (required before we can use it)
|
|
Packit Service |
a1973e |
*/
|
|
Packit Service |
a1973e |
if (pfm_initialize() != PFMLIB_SUCCESS) {
|
|
Packit Service |
a1973e |
fatal_error("Can't initialize library\n");
|
|
Packit Service |
a1973e |
}
|
|
Packit Service |
a1973e |
|
|
Packit Service |
a1973e |
return mainloop(argv+optind);
|
|
Packit Service |
a1973e |
}
|