From: Thomas Gleixner <tglx@linutronix.de>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>, x86-ml <x86@kernel.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: rc5+tip/master: Marking clocksource 'tsc' as unstable because the skew is too large:
Date: Thu, 30 Jun 2016 11:42:57 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.11.1606301136310.3707@nanos> (raw)
In-Reply-To: <1467278139.9949.16.camel@gmail.com>
On Thu, 30 Jun 2016, Mike Galbraith wrote:
> On Thu, 2016-06-30 at 10:41 +0200, Thomas Gleixner wrote:
> > 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?
>
> [ 0.000000] tsc: Fast TSC calibration using PIT
> [ 0.000000] tsc: Detected 2260.928 MHz processor
> [ 13.205453] tsc: Refined TSC clocksource calibration: 2260.999 MHz
> [ 13.205457] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x20974a4d8bb, max_idle_ns: 440795246623 ns
> [ 14.592866] clocksource: Switched to clocksource tsc
> [ 575.781329] clocksource: timekeeping watchdog on CPU23: Marking clocksource 'tsc' as unstable because the skew is too large:
> [ 575.998835] clocksource: 'tsc' cs_now: 1c1effead80 cs_last: 139efdabfa5 mask: ffffffffffffffff
>
> trace_printk() leading to splat (hm, mask).
> <idle>-0 [023] ..s. 25.233237: clocksource_watchdog: cs_nsec: 511311920 wd_nsec: 511311599 delta: 321 wdnow: 362266206 cs->wd_last: 354945155 watchdog->mask: ffffffff
> <idle>-0 [023] ..s. 57.234242: clocksource_watchdog: cs_nsec: 511999944 wd_nsec: 511999396 delta: 548 wdnow: 820447848 cs->wd_last: 813116949 watchdog->mask: ffffffff
> <idle>-0 [023] ..s. 575.781321: clocksource_watchdog: cs_nsec: 258345057292 wd_nsec: 0 delta: 258345057292 wdnow: 3949895484 cs->wd_last: 250865676 watchdog->mask: ffffffff
>
So there was no watchdog firing for 525 seconds ????
next prev parent reply other threads:[~2016-06-30 10:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-27 20:06 rc5+tip/master: Marking clocksource 'tsc' as unstable because the skew is too large: Borislav Petkov
2016-06-29 17:16 ` Borislav Petkov
2016-06-30 7:57 ` Mike Galbraith
2016-06-30 8:41 ` Thomas Gleixner
2016-06-30 9:15 ` Mike Galbraith
2016-06-30 9:42 ` Thomas Gleixner [this message]
2016-06-30 9:49 ` Mike Galbraith
2016-06-30 10:24 ` Thomas Gleixner
2016-06-30 13:39 ` Mike Galbraith
2016-06-30 13:43 ` Thomas Gleixner
2016-06-30 14:27 ` Borislav Petkov
2016-06-30 14:29 ` Mike Galbraith
2016-06-30 20:11 ` Richard Cochran
2016-06-30 10:29 ` Mike Galbraith
2016-06-30 10:31 ` Thomas Gleixner
2016-06-30 8:40 ` Thomas Gleixner
2016-06-30 9:49 ` Borislav Petkov
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