|
Lines 711-716
tsc_calibrate(void)
Link Here
|
| 711 |
return; |
711 |
return; |
| 712 |
|
712 |
|
| 713 |
tc = atomic_load_ptr(&timecounter); |
713 |
tc = atomic_load_ptr(&timecounter); |
|
|
714 |
if (tc->tc_quality <= 0) |
| 715 |
goto calibrated; |
| 714 |
|
716 |
|
| 715 |
flags = intr_disable(); |
717 |
flags = intr_disable(); |
| 716 |
cpu = curcpu; |
718 |
cpu = curcpu; |
|
Lines 739-744
tsc_calibrate(void)
Link Here
|
| 739 |
freq_khz = tc->tc_frequency * (tsc_end - tsc_start) / (t_end - t_start); |
741 |
freq_khz = tc->tc_frequency * (tsc_end - tsc_start) / (t_end - t_start); |
| 740 |
|
742 |
|
| 741 |
tsc_update_freq(freq_khz); |
743 |
tsc_update_freq(freq_khz); |
|
|
744 |
calibrated: |
| 742 |
tc_init(&tsc_timecounter); |
745 |
tc_init(&tsc_timecounter); |
| 743 |
set_cputicker(rdtsc, tsc_freq, !tsc_is_invariant); |
746 |
set_cputicker(rdtsc, tsc_freq, !tsc_is_invariant); |
| 744 |
} |
747 |
} |