Messages in this thread | | | From | Vasily Khoruzhick <> | Subject | Re: Interrupt latency on some 945GM platforms | Date | Tue, 14 Sep 2010 11:09:36 +0300 |
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В сообщении от 14 of September 2010 03:55:32 автор Venkatesh Pallipadi написал:
> Whats the clockevent in this case ("Tick Device" section of > /proc/timer_list). clocksource= option only changes the clocksource used > to maintain > timeofday. But, timer interrupt (clockevent) source will not change. > Wondering how just the clocksource change is making the diff here.. > > Also, if clocksource tsc has a higher rating than HPET. The reason > HPET is getting used as clocksource in the first place seems to be due > to TSC is not a dependable clocksource on this platform (may be it > stops in C3). So, I am not sure forcing it to tsc will be a good > thing. May be clocksource=acpi_pm is a better thing to try. > > Thanks, > Venki
I investigated it a bit and found out that single nohz=off option helps. Just changing clocksource doesn't help, but it works smoothly with any clocksource with nohz=off. So, it seems that something wrong with intel driver while system is in tickless mode.
Regards Vasily [unhandled content-type:application/pgp-signature] | |