9 #include <machine/cpufunc.h>
10 #include <machine/atomic.h>
13 static void *do_child(void *arg);
14 static void *do_parent(void *arg);
20 main(int ac, char **av)
28 printf("tests umtx hand-off loop\n");
32 for (k = 0; k < 10; ++k) {
33 pthread_create(&td1, NULL, do_child, NULL);
34 pthread_create(&td2, NULL, do_parent, NULL);
35 pthread_join(td2, NULL);
36 pthread_join(td1, NULL);
38 stop_timing(total, "total");
42 while (wait3(&status, 0, NULL) <= 0 || errno == EINTR)
50 do_child(void *arg __unused)
54 umtx_sleep(&mtx, 0, 0);
55 if (atomic_swap_int(&mtx, 0) == 2) {
67 do_parent(void *arg __unused)
72 for (j = 0; j < 1000000; ++j) {
73 atomic_swap_int(&mtx, 1);
77 umtx_sleep(&mtx, 1, 0);
80 for (j = 0; j < 1000000; ++j) {
81 atomic_swap_int(&mtx, 1);
84 umtx_sleep(&mtx, 1, 0);
86 stop_timing(j, "mtx1");
87 atomic_add_long(&total, j * 2);
89 atomic_swap_int(&mtx, 2);
92 umtx_sleep(&mtx, 2, 0);