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/*
* test_cycles_per_loop.c
*
* Userspace RCU library - test cycles per loop
*
* 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.
*/
#include <urcu/arch.h>
#include <stdio.h>
#define NR_LOOPS 1000000UL
static inline void loop_sleep(unsigned long loops)
{
while (loops-- != 0)
caa_cpu_relax();
}
int main()
{
cycles_t time1, time2;
time1 = caa_get_cycles();
loop_sleep(NR_LOOPS);
time2 = caa_get_cycles();
printf("CPU clock cycles per loop: %g\n", (time2 - time1) /
(double)NR_LOOPS);
return 0;
}
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