test/sysperf/quicksw1.c

   1 /*
   2  * quicksw1.c
   3  *
   4  * $DragonFly: src/test/sysperf/quicksw1.c,v 1.1 2003/08/12 02:29:44 dillon Exp $
   5  */
   6
   7 #include "blib.h"
   8
   9 void qswitch(int **oldsw, int *newsw);
  10 void qstart(int *newsw);
  11 int *qinit(void *topstk, void *func, void *arg);
  12
  13 static void do_task1(void *arg);
  14 static void do_task2(void *arg);
  15
  16 int *task1;
  17 int *task2;
  18 char stk1[16384];
  19 char stk2[16384];
  20 int count;
  21
  22 int
  23 main(int ac, char **av)
  24 {
  25 #if USE_ALL
  26     printf("userthread switching test (nonfp) using pushal/popal\n");
  27 #elif USE_CALLU1
  28     printf("userthread switching test (nonfp) using pushl (call-save only)\n");
  29 #elif USE_CALLU2
  30     printf("userthread switching test (nonfp) using subl $N,%%esp;movl (call-save only)\n");
  31 #else
  32 #error "The switch method wasn't defined with -D"
  33 #endif
  34
  35     task1 = qinit(stk1 + sizeof(stk1), do_task1, NULL);
  36     task2 = qinit(stk2 + sizeof(stk2), do_task2, NULL);
  37     start_timing();
  38     qstart(task1);
  39 }
  40
  41 static void
  42 do_task1(void *arg)
  43 {
  44     for (;;) {
  45         qswitch(&task1, task2);
  46         if (++count > 10000000) {
  47                 stop_timing(count, "uthread_switch");
  48                 exit(0);
  49         }
  50     }
  51 }
  52
  53 static void
  54 do_task2(void *arg)
  55 {
  56     for (;;) {
  57         ++count;
  58         qswitch(&task2, task1);
  59     }
  60 }
  61