2 * test_cycles_per_loop.c
4 * Userspace RCU library - test cycles per loop
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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.
23 #include <urcu/arch.h>
26 #define NR_LOOPS 1000000UL
28 static inline void loop_sleep(unsigned long loops
)
36 caa_cycles_t time1
, time2
;
38 time1
= caa_get_cycles();
40 time2
= caa_get_cycles();
41 printf("CPU clock cycles per loop: %g\n", (time2
- time1
) /
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