test/sysperf/lockmgr2.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         close(open("/tmp/lockmgr2.test", O_RDWR|O_CREAT, 0666));
  31         start_timing();
  32         while (stop_timing(0, NULL) == 0) {
  33                 fd = open("/tmp/lockmgr2.test", O_RDONLY, 0666);
  34                 assert(fd >= 0);
  35                 fstat(fd, &st);
  36                 close(fd);
  37                 ++count;
  38         }
  39         max = count;
  40         close(fd);
  41
  42         if (ac > 1)
  43                 n = strtol(av[1], NULL, 0);
  44         else
  45                 n = 1;
  46
  47         start_timing();
  48         for (i = 0; i < n; ++i) {
  49                 asprintf(&path, "/tmp/lockmgr.test");
  50                 close(open(path, O_RDWR|O_CREAT, 0666));
  51                 if (fork() == 0) {
  52                         for (count = 0; count < max; ++count) {
  53                                 fd = open(path, O_RDONLY, 0666);
  54                                 assert(fd >= 0);
  55                                 fstat(fd, &st);
  56                                 close(fd);
  57                         }
  58                         _exit(0);
  59                 }
  60         }
  61         while (wait3(&status, 0, NULL) >= 0 || errno == EINTR)
  62                 ;
  63         stop_timing(max * n, "lockmgr2");
  64
  65         return(0);
  66 }