From: Thomas Gleixner <tglx@linutronix.de>
To: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
john stultz <johnstul@us.ibm.com>,
LKML <linux-kernel@vger.kernel.org>, Len Brown <lenb@kernel.org>,
Arjan van de Ven <arjan@infradead.org>,
Roman Zippel <zippel@linux-m68k.org>
Subject: Re: [patch 13/19] GTOD: Mark TSC unusable for highres timers
Date: Sat, 11 Nov 2006 14:58:08 +0100 [thread overview]
Message-ID: <1163253488.8335.247.camel@localhost.localdomain> (raw)
In-Reply-To: <200611111451.33511.ak@suse.de>
On Sat, 2006-11-11 at 14:51 +0100, Andi Kleen wrote:
> > > > And afaict the reason for that is that we're using jiffies to determine if
> > > > the TSC has gone bad, and that test is getting false positives.
> > >
> > > The i386 clocksource had always trouble with that. e.g. I have a box
> > > where the TSC works perfectly fine on a 64bit kernel, but since the new i386
> > > clocksource code is in it always insists on disabling it shortly after boot.
>
> shortly after boot means in user space here, not during the first idling.
>
> > > My guess is that some of the checks in there are just broken and need
> > > to be fixed.
> >
> > It's the unconditional mark_unstable call in ACPI C2 state. /me looks.
>
> The system doesn't support C2 states. It's an older single socket Athlon 64
> with VIA chipset. I haven't looked in detail on why it fails.
Does it have cpu freqency changing ?
tglx
next prev parent reply other threads:[~2006-11-11 13:55 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-09 23:38 [patch 00/21] Highres / dynticks drop in replacement for 2.6.19-rc5-mm1 Thomas Gleixner
2006-11-09 23:38 ` [patch 01/19] hrtimers: state tracking Thomas Gleixner
2006-11-10 9:19 ` Arjan van de Ven
2006-11-10 9:40 ` Andrew Morton
2006-11-10 9:45 ` Thomas Gleixner
2006-11-23 22:26 ` Roman Zippel
2006-11-09 23:38 ` [patch 02/19] hrtimers: clean up callback tracking Thomas Gleixner
2006-11-10 9:20 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 03/19] hrtimers: Move and add documentation Thomas Gleixner
2006-11-09 23:38 ` [patch 04/19] Add a framework to manage clock event devices Thomas Gleixner
2006-11-10 9:47 ` Arjan van de Ven
2006-11-23 22:36 ` Roman Zippel
2006-11-09 23:38 ` [patch 05/19] ACPI: Include apic.h Thomas Gleixner
2006-11-09 23:38 ` [patch 06/19] ACPI: Keep track of timer broadcast Thomas Gleixner
2006-11-10 9:51 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 07/19] ACPI: Add state propagation for dynamic broadcasting Thomas Gleixner
2006-11-10 9:52 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 08/19] i386: cleanup apic code Thomas Gleixner
2006-11-10 10:04 ` Arjan van de Ven
2006-11-10 10:16 ` Thomas Gleixner
2006-11-10 10:16 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 09/19] i386: Convert to clock event devices Thomas Gleixner
2006-11-10 10:10 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 10/19] PM_timer: allow early access and move externs to a header file Thomas Gleixner
2006-11-10 10:12 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 11/19] i386: Rework local APIC calibration Thomas Gleixner
2006-11-10 10:17 ` Arjan van de Ven
2006-11-10 10:23 ` Thomas Gleixner
2006-11-10 11:10 ` Ingo Molnar
2006-11-09 23:38 ` [patch 12/19] high-res timers: core Thomas Gleixner
2006-11-10 10:26 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 13/19] GTOD: Mark TSC unusable for highres timers Thomas Gleixner
2006-11-10 1:10 ` john stultz
2006-11-10 5:10 ` Andi Kleen
2006-11-10 8:10 ` Thomas Gleixner
2006-11-10 8:50 ` Andrew Morton
2006-11-10 8:57 ` Ingo Molnar
2006-11-10 9:13 ` Andrew Morton
2006-11-10 9:29 ` Andi Kleen
2006-11-11 11:14 ` Thomas Gleixner
2006-11-11 13:51 ` Andi Kleen
2006-11-11 13:58 ` Thomas Gleixner [this message]
2006-11-11 13:59 ` Andi Kleen
2006-11-11 14:08 ` Thomas Gleixner
2006-11-10 10:35 ` Arjan van de Ven
2006-11-10 10:47 ` Andi Kleen
2006-11-10 10:55 ` Arjan van de Ven
2006-11-10 11:13 ` Ingo Molnar
2006-11-10 11:28 ` Andi Kleen
2006-11-10 9:27 ` Andi Kleen
2006-11-10 10:14 ` Alan Cox
2006-11-10 11:19 ` Ingo Molnar
2006-11-10 15:43 ` Chris Friesen
2006-11-10 11:12 ` Pavel Machek
2006-11-10 11:48 ` Ingo Molnar
2006-11-10 11:56 ` Andi Kleen
2006-11-10 13:12 ` Ingo Molnar
2006-11-10 12:00 ` Pavel Machek
2006-11-10 13:14 ` Ingo Molnar
2006-11-10 11:11 ` Pavel Machek
2006-11-10 10:28 ` Arjan van de Ven
2006-11-10 10:30 ` Andi Kleen
2006-11-10 10:37 ` Arjan van de Ven
2006-11-09 23:38 ` [patch 14/19] dynticks: core code Thomas Gleixner
2006-11-09 23:38 ` [patch 15/19] dyntick: add nohz stats to /proc/stat Thomas Gleixner
2006-11-09 23:38 ` [patch 16/19] dynticks: i386 arch code Thomas Gleixner
2006-11-09 23:38 ` [patch 17/19] dynticks: Fix nmi watchdog Thomas Gleixner
2006-11-09 23:38 ` [patch 18/19] high-res timers, dynticks: enable i386 support Thomas Gleixner
2006-11-09 23:38 ` [patch 19/19] debugging feature: timer stats Thomas Gleixner
2006-11-23 22:24 ` [patch 00/21] Highres / dynticks drop in replacement for 2.6.19-rc5-mm1 Roman Zippel
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