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

From: John Stultz
Date: Wed Dec 02 2015 - 18:42:40 EST


On Wed, Dec 2, 2015 at 3:38 PM, John Stultz <john.stultz@xxxxxxxxxx> wrote:
> On Wed, Dec 2, 2015 at 3:25 PM, Andy Lutomirski <luto@xxxxxxxxxx> 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.

thanks
-john
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