Add `urcu_posix_assert()` as `assert()` replacement
[urcu.git] / tests / benchmark / test_looplen.c
1 /*
2 * test_looplen.c
3 *
4 * Userspace RCU library - test program
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 <stdio.h>
24 #include <pthread.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <sys/types.h>
28 #include <sys/wait.h>
29 #include <unistd.h>
30 #include <stdio.h>
31 #include <sched.h>
32 #include <errno.h>
33
34 #include <urcu/arch.h>
35 #include <urcu/assert.h>
36
37 #ifndef DYNAMIC_LINK_TEST
38 #define _LGPL_SOURCE
39 #else
40 #define debug_yield_read()
41 #endif
42 #include <urcu.h>
43
44 static inline void loop_sleep(unsigned long loops)
45 {
46 while (loops-- != 0)
47 caa_cpu_relax();
48 }
49
50 #define LOOPS 1048576
51 #define TESTS 10
52
53 int main(void)
54 {
55 unsigned long i;
56 caa_cycles_t time1, time2;
57 caa_cycles_t time_tot = 0;
58 double cpl;
59
60 for (i = 0; i < TESTS; i++) {
61 time1 = caa_get_cycles();
62 loop_sleep(LOOPS);
63 time2 = caa_get_cycles();
64 time_tot += time2 - time1;
65 }
66 cpl = ((double)time_tot) / (double)TESTS / (double)LOOPS;
67
68 printf("CALIBRATION : %g cycles per loop\n", cpl);
69 printf("time_tot = %llu, LOOPS = %d, TESTS = %d\n",
70 (unsigned long long) time_tot, LOOPS, TESTS);
71
72 return 0;
73 }
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