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/*
* test_looplen.c
*
* Userspace RCU library - test program
*
* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* 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.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include <sched.h>
#include <errno.h>
#include <urcu/arch.h>
#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#else
#define debug_yield_read()
#endif
#include <urcu.h>
static inline void loop_sleep(unsigned long loops)
{
while (loops-- != 0)
caa_cpu_relax();
}
#define LOOPS 1048576
#define TESTS 10
int main(int argc, char **argv)
{
unsigned long i;
cycles_t time1, time2;
cycles_t time_tot = 0;
double cpl;
for (i = 0; i < TESTS; i++) {
time1 = caa_get_cycles();
loop_sleep(LOOPS);
time2 = caa_get_cycles();
time_tot += time2 - time1;
}
cpl = ((double)time_tot) / (double)TESTS / (double)LOOPS;
printf("CALIBRATION : %g cycles per loop\n", cpl);
printf("time_tot = %llu, LOOPS = %d, TESTS = %d\n",
time_tot, LOOPS, TESTS);
return 0;
}
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