Fix: membarrier fallback symbol conflict
[urcu.git] / tests / test_cycles_per_loop.c
1 /*
2 * test_cycles_per_loop.c
3 *
4 * Userspace RCU library - test cycles per loop
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22
23 #include <urcu/arch.h>
24 #include <stdio.h>
25
26 #define NR_LOOPS 1000000UL
27
28 static inline void loop_sleep(unsigned long loops)
29 {
30 while (loops-- != 0)
31 caa_cpu_relax();
32 }
33
34 int main()
35 {
36 cycles_t time1, time2;
37
38 time1 = caa_get_cycles();
39 loop_sleep(NR_LOOPS);
40 time2 = caa_get_cycles();
41 printf("CPU clock cycles per loop: %g\n", (time2 - time1) /
42 (double)NR_LOOPS);
43 return 0;
44 }
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