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Hash :
7b089321
Author :
Date :
2025-01-01T09:24:36
maint: run 'make update-copyright'
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/* Utilities for benchmarks.
Copyright (C) 2018-2025 Free Software Foundation, Inc.
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 3 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, see <https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <sys/resource.h>
#include <sys/time.h>
struct timings_state
{
/* Filled when the timings start. */
struct timeval real_start;
struct timeval user_start;
struct timeval sys_start;
/* Filled when the timings end. */
long real_usec;
long user_usec;
long sys_usec;
};
static void
timing_start (struct timings_state *ts)
{
struct rusage usage;
getrusage (RUSAGE_SELF, &usage);
ts->user_start = usage.ru_utime;
ts->sys_start = usage.ru_stime;
gettimeofday (&ts->real_start, NULL);
}
static void
timing_end (struct timings_state *ts)
{
struct timeval real_end;
struct rusage usage;
gettimeofday (&real_end, NULL);
getrusage (RUSAGE_SELF, &usage);
ts->real_usec = (real_end.tv_sec - ts->real_start.tv_sec) * 1000000
+ real_end.tv_usec - ts->real_start.tv_usec;
ts->user_usec = (usage.ru_utime.tv_sec - ts->user_start.tv_sec) * 1000000
+ usage.ru_utime.tv_usec - ts->user_start.tv_usec;
ts->sys_usec = (usage.ru_stime.tv_sec - ts->sys_start.tv_sec) * 1000000
+ usage.ru_stime.tv_usec - ts->sys_start.tv_usec;
}
_GL_UNUSED static void
timing_output (const struct timings_state *ts)
{
printf ("real %10.6f\n", (double)ts->real_usec / 1000000.0);
printf ("user %7.3f\n", (double)ts->user_usec / 1000000.0);
printf ("sys %7.3f\n", (double)ts->sys_usec / 1000000.0);
}