test/sysperf/syscall1.c

   1 /*
   2  * syscall1.c
   3  *
   4  * N thread getuid timing test (default 1)
   5  */
   6
   7 #include "blib.h"
   8
   9 int
  10 main(int ac, char **av)
  11 {
  12         long long count = 0;
  13         long long max;
  14         char c;
  15         int n;
  16         int i;
  17         int j;
  18         int status;
  19
  20         printf("timing standard getuid() syscall, single thread\n");
  21         printf("if using powerd, run several times\n");
  22
  23         start_timing();
  24         while (stop_timing(0, NULL) == 0) {
  25                 for (j = 0; j < 100; ++j)
  26                         getuid();
  27                 count += 100;
  28         }
  29         max = count;
  30
  31         if (ac > 1)
  32                 n = strtol(av[1], NULL, 0);
  33         else
  34                 n = 1;
  35
  36         start_timing();
  37         for (i = 0; i < n; ++i) {
  38                 if (fork() == 0) {
  39                         for (count = 0; count < max; count += 100) {
  40                                 for (j = 0; j < 100; ++j)
  41                                         getuid();
  42                         }
  43                         _exit(0);
  44                 }
  45         }
  46         while (wait3(&status, 0, NULL) >= 0 || errno == EINTR)
  47                 ;
  48         stop_timing(count * n, "getuid()");
  49
  50         return(0);
  51 }
  52