src/tests/system/kernel/syscall_time.cpp

   1 /*
   2  * Copyright 2005, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <OS.h>
   8 #include <stdio.h>
   9
  10 #ifdef __HAIKU__
  11 #       include <syscalls.h>
  12 #endif
  13
  14
  15 int
  16 main(int argc, char **argv)
  17 {
  18         const int32 loops = 100000;
  19         bigtime_t startTime = system_time();
  20
  21         for (int32 i = 0; i < loops; i++) {
  22 #ifdef __HAIKU__
  23                 _kern_is_computer_on();
  24 #else
  25                 is_computer_on();
  26 #endif
  27         }
  28
  29         bigtime_t runTime = system_time() - startTime;
  30
  31         // empty loop time
  32
  33         startTime = system_time();
  34
  35         for (int32 i = 0; i < loops; i++)
  36                 ;
  37
  38         runTime -= system_time() - startTime;
  39
  40         printf("%f usecs/syscall\n", 1.0 * runTime / loops);
  41         return 0;
  42 }