test/sysperf/exec1.c

   1 /*
   2  * exec1.c
   3  *
   4  * $DragonFly: src/test/sysperf/exec1.c,v 1.2 2004/04/14 19:59:45 dillon Exp $
   5  */
   6
   7 #include "blib.h"
   8 #include <sys/resource.h>
   9 #include <sys/wait.h>
  10 #include <sys/time.h>
  11
  12 char *Av0;
  13
  14 static
  15 void
  16 execltest(void)
  17 {
  18     pid_t pid;
  19     char *elm;
  20
  21     if ((elm = strrchr(Av0, '/')) == NULL)
  22         elm = Av0;
  23     else
  24         ++elm;
  25
  26     if ((pid = vfork()) == 0) {
  27         setpriority(PRIO_PROCESS, getpid(), -20);
  28         execl(Av0, elm, "dummy", NULL);
  29         _exit(1);
  30     } else if (pid < 0) {
  31         perror("vfork");
  32         exit(1);
  33     } else {
  34         int status;
  35
  36         while(waitpid(pid, &status, 0) != pid)
  37             ;
  38         if (WEXITSTATUS(status)) {
  39             fprintf(stderr, "execl in child failed\n");
  40             exit(1);
  41         }
  42     }
  43 }
  44
  45 int
  46 main(int ac, char **av)
  47 {
  48     int i;
  49     int count;
  50
  51     Av0 = av[0];
  52     if (ac == 2)
  53         exit(0);
  54
  55     count = 0;
  56     start_timing();
  57     while (stop_timing(0, NULL) == 0) {
  58         for (i = 0; i < 100; ++i)
  59             execltest();
  60         count += 100;
  61     }
  62     count *= 5;         /* 5 second run */
  63     start_timing();
  64     for (i = 0; i < count; ++i)
  65         execltest();
  66 #ifdef ISSTATIC
  67     stop_timing(count, "execl static program:", count);
  68 #else
  69     stop_timing(count, "execl dynamic program:", count);
  70 #endif
  71     return(0);
  72 }
  73