From: Jon Masters <jonathan@jonmasters.org>
To: John Stultz <john.stultz@linaro.org>, Andy Lutomirski <luto@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
X86 ML <x86@kernel.org>,
"Hunter, Adrian" <adrian.hunter@intel.com>
Subject: Re: Skylake (XPS 13 9350) TSC is way off
Date: Mon, 21 Dec 2015 03:10:19 -0500 [thread overview]
Message-ID: <5677B3EB.9030908@jonmasters.org> (raw)
In-Reply-To: <CALAqxLUdnvkHP9qKFmAkHfLy=5vz-GOTz9dJx2bDQMj9TqzZbA@mail.gmail.com>
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.
next prev parent reply other threads:[~2015-12-21 8:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 20:06 Skylake (XPS 13 9350) TSC is way off Andy Lutomirski
2015-12-02 22:52 ` Brown, Len
2015-12-02 23:25 ` Andy Lutomirski
2015-12-02 23:38 ` John Stultz
2015-12-02 23:42 ` Andy Lutomirski
2015-12-02 23:55 ` John Stultz
2015-12-21 8:10 ` Jon Masters [this message]
2015-12-21 21:56 ` John Stultz
2015-12-02 23:42 ` John Stultz
2015-12-02 23:59 ` Andy Lutomirski
2015-12-03 3:25 ` Brown, Len
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