test/sysperf/lockmgr3.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/file.h>
  11 #include <assert.h>
  12
  13 int
  14 main(int ac, char **av)
  15 {
  16         long long count = 0;
  17         long long max;
  18         char c;
  19         int n;
  20         int i;
  21         int j;
  22         int fd;
  23         int status;
  24         char *path;
  25         char buf[256];
  26         struct stat st;
  27
  28         printf("timing standard fstat() syscall\n");
  29
  30         fd = open("/tmp/lockmgr3.test", O_RDWR|O_CREAT, 0666);
  31         assert(fd >= 0);
  32         start_timing();
  33         while (stop_timing(0, NULL) == 0) {
  34                 fstat(fd, &st);
  35                 fstat(fd, &st);
  36                 fstat(fd, &st);
  37                 fstat(fd, &st);
  38                 ++count;
  39         }
  40         max = count * 4;
  41         close(fd);
  42
  43         if (ac > 1)
  44                 n = strtol(av[1], NULL, 0);
  45         else
  46                 n = 1;
  47
  48         start_timing();
  49         for (i = 0; i < n; ++i) {
  50                 if (fork() == 0) {
  51                         asprintf(&path, "/tmp/lockmgr.test");
  52                         fd = open(path, O_RDWR|O_CREAT, 0666);
  53                         assert(fd >= 0);
  54                         for (count = 0; count < max; ++count) {
  55                                 fstat(fd, &st);
  56                                 fstat(fd, &st);
  57                                 fstat(fd, &st);
  58                                 fstat(fd, &st);
  59                         }
  60                         _exit(0);
  61                 }
  62         }
  63         while (wait3(&status, 0, NULL) >= 0 || errno == EINTR)
  64                 ;
  65         stop_timing(max * n * 4, "lockmgr3");
  66
  67         return(0);
  68 }