Messages in this thread | | | From | Noam Camus <> | Subject | RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver | Date | Thu, 10 Nov 2016 13:00:57 +0000 |
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>From: Daniel Lezcano [mailto:daniel.lezcano@linaro.org] >Sent: Thursday, November 10, 2016 12:34 PM
>>> give a correct result without a dmesg log ? >> [root@192.168.8.2 /]$ [root@192.168.8.2 /]$ 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
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