linux-kernel - Re: rc5+tip/master: Marking clocksource 'tsc' as unstable because the skew is too large:

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Message-ID: <alpine.DEB.2.11.1606301041070.3707@nanos>
Date:	Thu, 30 Jun 2016 10:41:43 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
cc:	Borislav Petkov <bp@...en8.de>,
	Peter Zijlstra <peterz@...radead.org>, x86-ml <x86@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: rc5+tip/master: Marking clocksource 'tsc' as unstable because
 the skew is too large:

On Thu, 30 Jun 2016, Mike Galbraith wrote:

> On Wed, 2016-06-29 at 19:16 +0200, Borislav Petkov wrote:
> 
> > And here it is again:
> > 
> > ...
> > [   15.720833] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> > [   32.883077] clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc' as unstable because the skew is too large:
> > [   32.896986] clocksource:                       'acpi_pm' wd_now: 8e147 wd_last: 531b43 mask: ffffff
> > [   32.908834] clocksource:                       'tsc' cs_now: 385f4b6d1e cs_last: 354328bcea mask: ffffffffffffffff
> > [   32.922293] clocksource: Switched to clocksource acpi_pm
> 
> I met that too when testing, but only on my 8 socket box for whatever
> reason.  Putting tip back on the box and poking a bit while I beat up
> rt kernels elsewhere, cs_nsec: 167001172874 wd_nsec: 0.  (poke++)

can i get the full data please including tsc frequency?