static void kvm_clock_test(void *data)
{
struct test_info *hv_test_info = (struct test_info *)data;
long i, check = hv_test_info->check;
for (i = 0; i < hv_test_info->loops; i++){
cycle_t t0, t1;
long long delta;
if (check == 0) {
kvm_clock_read();
continue;
}
spin_lock(&hv_test_info->lock);
t1 = kvm_clock_read();
t0 = hv_test_info->last;
hv_test_info->last = kvm_clock_read();
spin_unlock(&hv_test_info->lock);
delta = t1 - t0;
if (delta < 0) {
spin_lock(&hv_test_info->lock);
++hv_test_info->warps;
if (delta < hv_test_info->worst){
hv_test_info->worst = delta;
printf("Worst warp %lld %\n", hv_test_info->worst);
}
spin_unlock(&hv_test_info->lock);
}
if (delta == 0)
++hv_test_info->stalls;
if (!((unsigned long)i & 31))
asm volatile("rep; nop");
}
atomic_dec(&hv_test_info->ncpus);
}
static void wallclock_test(void *data)
{
int *p_err = data;
long ksec, offset;
struct timespec ts;
kvm_get_wallclock(&ts);
ksec = ts.tv_sec;
offset = ksec - sec;
printf("Raw nanoseconds value from kvmclock: %" PRIu64 " (cpu %d)\n", kvm_clock_read(), smp_id());
printf("Seconds get from kvmclock: %ld (cpu %d, offset: %ld)\n", ksec, smp_id(), offset);
if (offset > threshold || offset < -threshold) {
printf("offset too large!\n");
(*p_err)++;
}
}
