Date: Thu, 17 Jan 2013 11:03:10 +0100 From: "Ronald Klop" <ronald-freebsd8@klop.yi.org> To: freebsd-stable@freebsd.org Subject: Re: time issues and some more Message-ID: <op.wq1vjkyv8527sy@ronaldradial.versatec.local> In-Reply-To: <E1TvlIV-00013s-Rz@kabab.cs.huji.ac.il> References: <E1TvPZ7-000NC7-5C@kabab.cs.huji.ac.il> <op.wq0mrtuy8527sy@212-182-167-131.ip.telfort.nl> <E1TvlIV-00013s-Rz@kabab.cs.huji.ac.il>
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On Thu, 17 Jan 2013 09:58:07 +0100, Daniel Braniss <danny@cs.huji.ac.il> wrote: >> On Wed, 16 Jan 2013 10:45:49 +0100, Daniel Braniss <danny@cs.huji.ac.il> >> wrote: >> >> > I resently upgraded a Dell PowerEdge R710, to 9.1-stable, we mainly >> use >> > it as >> > a backup to several zfs servers (doing send|receive) without major >> > issues till >> > the upgrade, it was running 8.2-stable. >> > >> > now, we see that sometime the time drifts, and today I noticed that it >> > was >> > hung, and once I got unto the ipmi console this is what i got: >> > [SOL Session operational. Use ~? for help] >> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 3864, size: >> 12288 >> > >> > and things started moving again, >> > >> > in /var/log/messages: >> > Jan 16 03:27:35 store-02 kernel: swap_pager: indefinite wait buffer: >> > bufobj: >> > 0, blkno: 3864, size: 12288 >> > >> > but the REAL time is 7hs ahead!, so time stood still ? >> > and now, of course we get: >> > Jan 16 03:54:19 store-02 ntpd[38163]: time correction of 25216 seconds >> > exceeds >> > sanity limit (1000); set clock manually to the correct UTC time. >> > >> > I will now reboot, and try a newer kernel and check, but any insight >> will >> > be very helpful, >> > >> > thanks, >> > danny >> >> Does BSD 9 choose another timer source than BSD 8? >> Use sysctl to check these values at your system. >> kern.eventtimer.choice: LAPIC(400) i8254(100) RTC(0) >> kern.eventtimer.timer: LAPIC >> >> Or this ones. I always confuse these. >> kern.timecounter.choice: TSC-low(1000) ACPI-fast(900) i8254(0) >> dummy(-1000000) >> kern.timecounter.hardware: TSC-low >> > > under 8.3 it's kern.timecounte, so this is what I get: > >> sysctl kern.timecounter > kern.timecounter.tick: 1 > kern.timecounter.choice: TSC(-100) HPET(900) ACPI-fast(1000) i8254(0) > dummy(-1000000) > kern.timecounter.hardware: ACPI-fast > kern.timecounter.stepwarnings: 0 > kern.timecounter.tc.i8254.mask: 65535 > kern.timecounter.tc.i8254.counter: 52515 > kern.timecounter.tc.i8254.frequency: 1193182 > kern.timecounter.tc.i8254.quality: 0 > kern.timecounter.tc.ACPI-fast.mask: 16777215 > kern.timecounter.tc.ACPI-fast.counter: 925448 > kern.timecounter.tc.ACPI-fast.frequency: 3579545 > kern.timecounter.tc.ACPI-fast.quality: 1000 > kern.timecounter.tc.HPET.mask: 4294967295 > kern.timecounter.tc.HPET.counter: 1472869277 > kern.timecounter.tc.HPET.frequency: 14318180 > kern.timecounter.tc.HPET.quality: 900 > kern.timecounter.tc.TSC.mask: 4294967295 > kern.timecounter.tc.TSC.counter: 4125922088 > kern.timecounter.tc.TSC.frequency: 2329838875 > kern.timecounter.tc.TSC.quality: -100 > kern.timecounter.smp_tsc: 0 > kern.timecounter.invariant_tsc: 1 > > so I assume the choise is HPET, under 9.1: > kern.eventtimer.timer: HPET Your servers uses: > kern.timecounter.hardware: ACPI-fast Please check that value on 9.1 and 8.3. > > so it seems to be the same. > > btw, this morning I see that it's behind more than 1 hour, and no signs > of > ntpd! > > the logs show: > ... > Jan 17 00:40:52 store-02 kernel: usb_dev_suspend_peer: Setting device > remote > wakeup failed > Jan 17 01:05:46 store-02 ntpd[1845]: time correction of 7854 seconds > exceeds > sanity limit (1000); set clock manually to the correct UTC time. > ... > > it seems to me that the 7854 seconds is exactly the time diff: > date on this hosts says: > Thu Jan 17 08:46:18 IST 2013 > > > addig the 7854 sec is the current(almost) real date: > Thu Jan 17 10:57:13 IST 2013 > > something is very fishy here. Are you doing suspend/resume stuff on your machine? Or does usb_dev_suspend_peer mean suspend in another way? Ronald.
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