Re: net6501 - large clock drift under high load

On Fri, October 24, 2014 9:35 am, Martin Sofaru wrote:
> we have suffered from the same issue. Applying the force-enable-hpet
> patch [1] helps.
>
> With that the kernel chooses tsc as clocksource and the system keeps
> stable time with ntp.
>
> Also, do not forget to pass intel_idle.max_cstate=1 to keep tsc stable.

On Fri, October 24, 2014 10:30 am, David Mansfield wrote:
> Your problem could be more severe, clock ticks being dropped?  Do you
> have any "strange" kernel modules loaded, or any "strange" hardware in
> the box?

Thanks Martin and David.  Martin, I'll take a look at the patch and
configuration this weekend.  David, nothing strange about my kernel, I
don't believe.  It is fairly stock, with some obvious not-needed drivers
removed.  As for hardware, I do have a esata card installed, but that is
it.

Thanks again,
Bryan