test/sysperf/loop1.c

   1 /*
   2  * loop1.c
   3  *
   4  * used as a helper to test AST delivery.  Loops in user mode for 5 seconds.
   5  * $DragonFly: src/test/sysperf/loop1.c,v 1.1 2003/08/12 02:29:44 dillon Exp $
   6  */
   7
   8 #include "blib.h"
   9
  10 #define LOOP 100000000
  11
  12 static void nop() { }
  13
  14 int
  15 main(int ac, char **av)
  16 {
  17     int i;
  18
  19     printf("SMP contention, userland-only loop (run one, then run ncpu copies in parallel\n");
  20     start_timing();
  21     for (i = 0; i < LOOP; ++i)
  22         nop();
  23     stop_timing(LOOP, "loop1/user");
  24     return(0);
  25 }
  26