RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver

[Noam Camus]

>From: Daniel Lezcano [mailto:daniel.lezcano@xxxxxxxxxx] 
>Sent: Thursday, November 10, 2016 12:34 PM

>>> give a correct result without a dmesg log ?
>> [root@xxxxxxxxxxx /]$ [root@xxxxxxxxxxx /]$ taskset 65536 time sleep 2 
>> & taskset 131072 time sleep 3

>Thanks for providing the numbers.

>So there is no weird messages in dmesg ?
Yes, no weird messages, all seem normal.

>> real    0m 2.54s
>> user    0m 0.04s
>> sys     0m 0.14s
>> real    0m 3.47s
>> user    0m 0.00s
>> sys     0m 0.15s
>> [1]+  Done                       taskset 65536 time sleep 2
>> 
>> Seem OK to me.

>I'm not sure of that.

>2.54 instead of 2
>3.47 instead of 3

>0.02 time drift could be acceptable but 0.54 or 0.47 is too much.

>And 0.15 in sys also a big number AFAICT.

>Is the system in NO_HZ ?

We are handling system with NOHZ_FULL 
This was run under simulation and result are reasonable (indeed not perfect) AFAICT.

-Noam