From: "Denys Fedoryshchenko" <denys@visp.net.lb>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: TSC && HPET calibration
Date: Tue, 15 Jan 2008 15:54:12 +0200 [thread overview]
Message-ID: <20080115135318.M68697@visp.net.lb> (raw)
In-Reply-To: <20080115021720.ad71605f.akpm@linux-foundation.org>
Latest, 2.6.24-rc7, and 2.6.23 is the same.
If more information required, tell me. It is btw not latest (not based on
Core2) Xeon.
On Tue, 15 Jan 2008 02:17:20 -0800, Andrew Morton wrote
> On Thu, 10 Jan 2008 14:36:12 +0200 "Denys Fedoryshchenko"
> <denys@visp.net.lb> wrote:
>
> > Hi
> >
> > I have same issue, but it's never passed synchronization.
> >
> > Jan 10 12:59:44 visp-1 Time: tsc clocksource has been installed.
> > Jan 10 13:41:51 visp-1 ACPI: HPET 000F29CD, 0038 (r1 DELL
PE_SC3 1
> > DELL 1)
> > Jan 10 13:41:51 visp-1 ACPI: HPET id: 0x8086a201 base: 0xfed00000
> > Jan 10 13:41:51 visp-1 hpet clockevent registered
> > Jan 10 13:41:51 visp-1 checking TSC synchronization [CPU#0 -> CPU#1]:
passed.
> > Jan 10 13:41:51 visp-1 checking TSC synchronization [CPU#0 -> CPU#2]:
> > Jan 10 13:41:51 visp-1 Measured 1020 cycles TSC warp between CPUs,
turning
> > off TSC clock.
> > Jan 10 13:41:51 visp-1 Marking TSC unstable due to: check_tsc_sync_source
> > failed.
> > Jan 10 13:41:51 visp-1 hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
> > Jan 10 13:41:51 visp-1 hpet0: 3 64-bit timers, 14318180 Hz
> > Jan 10 13:41:51 visp-1 Time: hpet clocksource has been installed.
> >
> > grep Measures
> > Sep 19 14:31:28 visp-1 Measured 1044 cycles TSC warp between CPUs,
turning
> > off TSC clock.
> > Sep 19 18:22:46 visp-1 Measured 996 cycles TSC warp between CPUs, turning
off
> > TSC clock.
> > Sep 19 18:35:44 visp-1 Measured 1080 cycles TSC warp between CPUs,
turning
> > off TSC clock.
>
> Which kernel version?
--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.
next prev parent reply other threads:[~2008-01-15 13:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 12:36 TSC && HPET calibration Denys Fedoryshchenko
2008-01-15 10:17 ` Andrew Morton
2008-01-15 13:54 ` Denys Fedoryshchenko [this message]
2008-01-16 13:47 ` Thomas Gleixner
-- strict thread matches above, loose matches on Subject: below --
2007-09-16 13:02 Frans Pop
2007-09-16 10:47 Sami Farin
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