int main()
{
ticketlock_t mylock = TICKETLOCK_UNLOCKED;
ticketlock_lock(&mylock);
/* do critical magic here */
ticketlock_unlock(&mylock);
return 0;
}
static void* simple_ticketlock_yield(void* ignore) {
(void)ignore;
for (uint64_t i = 0; i < ITERATIONS; ++i) {
ticketlock_yieldlock(&simple_ticket);
WORK();
ticketlock_unlock(&simple_ticket);
}
return 0;
}
static void test_splinlock_speed() {
spinlock_init(&simple_spin);
ticketlock_init(&simple_ticket);
pthread_t threads[10];
printf("spinlock speed test (lock):\n");
for (int num = 1; num <= 16; num *= 2) {
printf("%2d threads: ", num);
fflush(stdout);
spinlock_lock(&simple_spin);
for (int t = 0; t < num; ++t) {
pthread_create(&threads[t], 0, simple_spinlock, 0);
}
int64_t start = ustime();
spinlock_unlock(&simple_spin);
for (int t = 0; t < num; ++t) {
pthread_join(threads[t], 0);
}
int64_t end = ustime();
printf("%6ld milliseconds\n", (end - start) / 1000);
}
printf("spinlock speed test (yieldock):\n");
for (int num = 1; num <= 16; num *= 2) {
printf("%2d threads: ", num);
fflush(stdout);
spinlock_lock(&simple_spin);
for (int t = 0; t < num; ++t) {
pthread_create(&threads[t], 0, simple_spinlock_yield, 0);
}
int64_t start = ustime();
spinlock_unlock(&simple_spin);
for (int t = 0; t < num; ++t) {
pthread_join(threads[t], 0);
}
int64_t end = ustime();
printf("%6ld milliseconds\n", (end - start) / 1000);
}
printf("ticketlock speed test (lock):\n");
for (int num = 1; num <= 8; num *= 2) {
printf("%2d threads: ", num);
fflush(stdout);
ticketlock_lock(&simple_ticket);
for (int t = 0; t < num; ++t) {
pthread_create(&threads[t], 0, simple_ticketlock, 0);
}
int64_t start = ustime();
ticketlock_unlock(&simple_ticket);
for (int t = 0; t < num; ++t) {
pthread_join(threads[t], 0);
}
int64_t end = ustime();
printf("%6ld milliseconds\n", (end - start) / 1000);
}
printf("ticketlock speed test (yieldlock):\n");
for (int num = 1; num <= 8; num *= 2) {
printf("%2d threads: ", num);
fflush(stdout);
ticketlock_lock(&simple_ticket);
for (int t = 0; t < num; ++t) {
pthread_create(&threads[t], 0, simple_ticketlock_yield, 0);
}
int64_t start = ustime();
ticketlock_unlock(&simple_ticket);
for (int t = 0; t < num; ++t) {
pthread_join(threads[t], 0);
}
int64_t end = ustime();
printf("%6ld milliseconds\n", (end - start) / 1000);
}
}
