uint64_t tsc2nsec(uint64_t tsc_time)
{
if (mult_will_overflow_u64(tsc_time, 1000000000))
return tsc2usec(tsc_time) * 1000;
else
return (tsc_time * 1000000000) / system_timing.tsc_freq;
}
uint64_t tsc2nsec(uint64_t tsc_time)
{
if (mult_will_overflow_u64(tsc_time, 1000000000))
return tsc2usec(tsc_time) * 1000;
else
return (tsc_time * 1000000000) / get_tsc_freq();
}
uint64_t epoch_usec(void)
{
return tsc2usec(epoch_tsc());
}
const int INTERVAL = 10000;
const int ITERATIONS = 100;
void alarm_handler(struct alarm_waiter *waiter)
{
__sync_fetch_and_add((int*)waiter->data, 1);
set_awaiter_inc(waiter, INTERVAL);
set_alarm(waiter);
}
int count = 0;
uint64_t now, then;
struct alarm_waiter waiter;
init_awaiter(&waiter, alarm_handler);
waiter.data = &count;
set_awaiter_rel(&waiter, INTERVAL);
now = tsc2usec(read_tsc());
set_alarm(&waiter);
while(count < ITERATIONS)
cpu_relax();
then = tsc2usec(read_tsc());
unset_alarm(&waiter);
UT_ASSERT_M("Alarms finished too soon", then >= (now + INTERVAL*count));
UT_ASSERT_M("Alarms finished too late", then < (now + 2*INTERVAL*count));
return true;
}
/* <--- End definition of test cases ---> */
struct utest utests[] = {
UTEST_REG(alarm),
};
