[urcu.git] / tests / benchmark / test_cycles_per_loop.c

// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later

/*
 * Userspace RCU library - test cycles per loop
 */

#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()
{
	caa_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;
}
Commit	Line	Data
ce29b371 MJ	1	// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	2	//
	3	// SPDX-License-Identifier: GPL-2.0-or-later
	4
3282a76b	5	/*
3282a76b	6	* Userspace RCU library - test cycles per loop
3282a76b MD	7	*/
3282a76b MD	8
d3d3d8f0 MD	9	#include <urcu/arch.h>
	10	#include <stdio.h>
	11
	12	#define NR_LOOPS 1000000UL
	13
ab0aacbe	14	static inline void loop_sleep(unsigned long loops)
d3d3d8f0	15	{
ab0aacbe	16	while (loops-- != 0)
06f22bdb	17	caa_cpu_relax();
d3d3d8f0 MD	18	}
	19
	20	int main()
	21	{
3fa18286	22	caa_cycles_t time1, time2;
d3d3d8f0	23
06f22bdb	24	time1 = caa_get_cycles();
d3d3d8f0	25	loop_sleep(NR_LOOPS);
06f22bdb	26	time2 = caa_get_cycles();
d3d3d8f0 MD	27	printf("CPU clock cycles per loop: %g\n", (time2 - time1) /
d3d3d8f0 MD	28	(double)NR_LOOPS);
9907018c	29	return 0;
d3d3d8f0	30	}