From: Andi Kleen <ak@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
John Stultz <johnstul@us.ibm.com>,
Valdis Kletnieks <valdis.kletnieks@vt.edu>,
Dave Jones <davej@redhat.com>,
David Woodhouse <dwmw2@infradead.org>, Jim Gettys <jg@laptop.org>,
Roman Zippel <zippel@linux-m68k.org>,
akpm@osdl.org
Subject: Re: [patch 00/22] high resolution timers / dynamic ticks - V3
Date: Mon, 16 Oct 2006 12:53:49 +0200 [thread overview]
Message-ID: <200610161253.49969.ak@suse.de> (raw)
In-Reply-To: <1160119688.3000.91.camel@laptopd505.fenrus.org>
On Friday 06 October 2006 09:28, Arjan van de Ven wrote:
>
> > But usually the problem wasn't that it was too slow, but that
> > it completely stopped in C2 or deeper. I don't think there
> > is a way to work around that except for not using C2 or deeper
> > (not an option) or using a different timer source.
>
> actually it's supposed to be C3 where lapic stops, not C2.
I've seen systems where it stopped in C2. The BIOS often
mix these states up anyways and report C3 as a kind of C2
(with the cache flushing etc in SMM) and the other way round.
I think that's related to getting better performance on
Windows.
-Andi
next prev parent reply other threads:[~2006-10-16 10:59 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-04 17:31 [patch 00/22] high resolution timers / dynamic ticks - V3 Thomas Gleixner
2006-10-04 17:31 ` [patch 01/22] GTOD: exponential update_wall_time Thomas Gleixner
2006-10-04 17:31 ` [patch 02/22] GTOD: persistent clock support, core Thomas Gleixner
2006-10-04 17:31 ` [patch 03/22] GTOD: persistent clock support, i386 Thomas Gleixner
2006-10-04 17:31 ` [patch 04/22] time: uninline jiffies.h Thomas Gleixner
2006-10-04 17:31 ` [patch 05/22] time: fix msecs_to_jiffies() bug Thomas Gleixner
2006-10-04 17:31 ` [patch 06/22] time: fix timeout overflow Thomas Gleixner
2006-10-04 17:31 ` [patch 07/22] cleanup: uninline irq_enter() and move it into a function Thomas Gleixner
2006-10-04 17:31 ` [patch 08/22] dynticks: extend next_timer_interrupt() to use a reference jiffie Thomas Gleixner
2006-10-04 17:31 ` [patch 09/22] hrtimers: namespace and enum cleanup Thomas Gleixner
2006-10-04 17:31 ` [patch 10/22] hrtimers: clean up locking Thomas Gleixner
2006-10-04 17:31 ` [patch 11/22] hrtimers: state tracking Thomas Gleixner
2006-10-04 17:31 ` [patch 12/22] hrtimers: clean up callback tracking Thomas Gleixner
2006-10-04 17:31 ` [patch 13/22] hrtimers: Move and add documentation Thomas Gleixner
2006-10-04 17:31 ` [patch 14/22] clockevents: core Thomas Gleixner
2006-10-04 17:31 ` [patch 15/22] clockevents: drivers for i386 Thomas Gleixner
2006-10-04 17:31 ` [patch 16/22] high-res timers: core Thomas Gleixner
2006-10-04 17:31 ` [patch 17/22] GTOD: Mark TSC unusable for highres timers Thomas Gleixner
2006-10-04 17:31 ` [patch 18/22] dynticks: core Thomas Gleixner
2006-10-04 17:31 ` [patch 19/22] dyntick: add nohz stats to /proc/stat Thomas Gleixner
2006-10-04 17:31 ` [patch 20/22] dynticks: i386 arch code Thomas Gleixner
2006-10-04 17:31 ` [patch 21/22] high-res timers, dynticks: enable i386 support Thomas Gleixner
2006-10-04 17:31 ` [patch 22/22] debugging feature: timer stats Thomas Gleixner
2006-10-05 8:16 ` [patch 00/22] high resolution timers / dynamic ticks - V3 Andrew Morton
2006-10-05 8:11 ` Ingo Molnar
2006-10-05 8:17 ` Ingo Molnar
2006-10-05 20:57 ` Andi Kleen
2006-10-05 21:11 ` Thomas Gleixner
2006-10-06 7:28 ` Arjan van de Ven
2006-10-16 10:53 ` Andi Kleen [this message]
2006-10-05 8:19 ` Andrew Morton
2006-10-05 8:23 ` Ingo Molnar
2006-10-05 8:50 ` Andrew Morton
2006-10-05 9:48 ` Thomas Gleixner
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