tests/test_cycles_per_loop.c

   1 #include <urcu/arch.h>
   2 #include <stdio.h>
   3
   4 #define NR_LOOPS 1000000UL
   5
   6 static inline void loop_sleep(unsigned long l)
   7 {
   8         while(l-- != 0)
   9                 cpu_relax();
  10 }
  11
  12 int main()
  13 {
  14         cycles_t time1, time2;
  15
  16         time1 = get_cycles();
  17         loop_sleep(NR_LOOPS);
  18         time2 = get_cycles();
  19         printf("CPU clock cycles per loop: %g\n", (time2 - time1) /
  20                                                   (double)NR_LOOPS);
  21 }