Re: Skylake (XPS 13 9350) TSC is way off

From	Jon Masters <jonathan@jonmasters.org>
Newsgroups	linux.kernel
Subject	Re: Skylake (XPS 13 9350) TSC is way off
Date	2015-12-21 09:20 +0100
Message-ID	<qI3Rg-40k-7@gated-at.bofh.it> (permalink)
References	(1 earlier) <qBoxu-50H-55@gated-at.bofh.it> <qBp0t-5qO-1@gated-at.bofh.it> <qBpa9-5uf-1@gated-at.bofh.it> <qBpjP-5xC-5@gated-at.bofh.it> <qBptw-5Bi-21@gated-at.bofh.it>
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On 12/2/15, 6:55 PM, John Stultz wrote:
> On Wed, Dec 2, 2015 at 3:42 PM, Andy Lutomirski <luto@kernel.org> wrote:

>>> On a hunch, are you running chrony instead of ntpd?
>>
>> Yes, this is indeed chrony.
>
> Ok. I'll have to look closer. The last time that message came up it
> was in a report of a bug that chrony uncovered with the internal
> correction being too slow. I know chrony is much more aggressive
> compared to ntpd in tweaking the freq value for the initial converging
> correction at startup, so maybe that along with something else is
> causing us to get out of spec.

Can you copy me on followup? I'm seeing similar behavior with chrony on 
recent kernels on a couple of different ARM server prototype systems.

Jon.

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Re: Skylake (XPS 13 9350) TSC is way off Jon Masters <jonathan@jonmasters.org> - 2015-12-21 09:20 +0100
  Re: Skylake (XPS 13 9350) TSC is way off John Stultz <john.stultz@linaro.org> - 2015-12-21 23:00 +0100

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