Messages in this thread | | | From | Andy Lutomirski <> | Date | Wed, 2 Dec 2015 15:59:28 -0800 | Subject | Re: Skylake (XPS 13 9350) TSC is way off |
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On Wed, Dec 2, 2015 at 3:42 PM, John Stultz <john.stultz@linaro.org> wrote: > On Wed, Dec 2, 2015 at 3:38 PM, John Stultz <john.stultz@linaro.org> wrote: >> On Wed, Dec 2, 2015 at 3:25 PM, Andy Lutomirski <luto@kernel.org> wrote: >>> In case it's at all useful, adjtimex -p says: >>> >>> mode: 0 >>> offset: 0 >>> frequency: 135641 >>> maxerror: 37498 >>> esterror: 1532 >>> status: 8192 >>> time_constant: 2 >>> precision: 1 >>> tolerance: 32768000 >>> tick: 10000 >>> raw time: 1449098317s 671243180us = 1449098317.671243180 >>> >>> this suggests a rather small correction, so I really have no idea what >>> "Adjusting tsc more than 11% (8039115 vs 7759462)" means. >>> >>> John, you wrote this code. What does the error message mean? > > Also, is there a behavior issue you're seeing or is this just a > concern about the warning? I assumed it was the first, but digging up > the thread here I'm not sure I see any specific problems listed.
No, there's no actual problem I'm aware of other than the error message. Skylake's TSC is different from other chips, and this is Skylake, and I was worried that something was wrong with the initial calibration. It seems like the initial calibration may be fine, though.
--Andy
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