test/sysperf/lockmgr1.c

   1 /*
   2  * varsym..c
   3  *
   4  * varsym [threads]
   5  *
   6  * tests shared lock using varsym_get()
   7  */
   8
   9 #include "blib.h"
  10 #include <sys/varsym.h>
  11
  12 int
  13 main(int ac, char **av)
  14 {
  15         long long count = 0;
  16         long long max;
  17         char c;
  18         int n;
  19         int i;
  20         int j;
  21         int status;
  22         char buf[256];
  23
  24         printf("timing standard varsym_get() syscall, VARSYM_SYS\n");
  25
  26         start_timing();
  27         while (stop_timing(0, NULL) == 0) {
  28                 varsym_get(VARSYM_SYS_MASK, "fubar", buf, sizeof(buf));
  29                 ++count;
  30         }
  31         max = count * 4;
  32
  33         if (ac > 1)
  34                 n = strtol(av[1], NULL, 0);
  35         else
  36                 n = 1;
  37
  38         start_timing();
  39         for (i = 0; i < n; ++i) {
  40                 if (fork() == 0) {
  41                         for (count = 0; count < max; ++count) {
  42                                 varsym_get(VARSYM_SYS_MASK, "fubar",
  43                                            buf, sizeof(buf));
  44                         }
  45                         _exit(0);
  46                 }
  47         }
  48         while (wait3(&status, 0, NULL) >= 0 || errno == EINTR)
  49                 ;
  50         stop_timing(max * n, "varsym1");
  51
  52         return(0);
  53 }