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From: Andi Kleen <andi@firstfloor.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Stefano Brivio <stefano.brivio@polimi.it>,
	Ingo Molnar <mingo@elte.hu>, Robert Love <rml@tech9.net>,
	linux-kernel@vger.kernel.org, Dave Jones <davej@redhat.com>,
	"Rafael J. Wysocki" <rjw@sisk.pl>, Michael Buesch <mb@bu3sch.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Len Brown <lenb@kernel.org>
Subject: Re: [PATCH] scheduler: fix x86 regression in native_sched_clock
Date: Fri, 07 Dec 2007 11:37:47 +0100	[thread overview]
Message-ID: <p737ijqkcxw.fsf@bingen.suse.de> (raw)
In-Reply-To: <alpine.LFD.0.99999.0712070646210.3221@localhost.localdomain> (Thomas Gleixner's message of "Fri\, 7 Dec 2007 06\:51\:55 +0100 \(CET\)")

Thomas Gleixner <tglx@linutronix.de> writes:
>
> Hmrpf. sched_clock() is used for the time stamp of the printks. We
> need to find some better solution other than killing off the tsc
> access completely.

Doing it properly requires pretty much most of my old sched-clock ff patch.
Complicated and not pretty, but ..
Unfortunately that version still had some jumps on cpufreq, but they
are fixable there.

-Andi

  parent reply	other threads:[~2007-12-07 10:38 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-07  1:19 Stefano Brivio
2007-12-07  5:29 ` Nick Piggin
2007-12-07  5:51 ` Thomas Gleixner
2007-12-07  7:18   ` Guillaume Chazarain
2007-12-07  8:02     ` Guillaume Chazarain
2007-12-07  8:51       ` Ingo Molnar
2007-12-07  9:29         ` Guillaume Chazarain
2007-12-07  9:59           ` Ingo Molnar
2007-12-07 13:55       ` [patch] x86: scale cyc_2_nsec according to CPU frequency Ingo Molnar
2007-12-07 14:27         ` Guillaume Chazarain
2007-12-07 14:52           ` Ingo Molnar
2007-12-08 15:57             ` Arjan van de Ven
2007-12-08 19:16               ` Ingo Molnar
2007-12-08 20:18                 ` Arjan van de Ven
2007-12-07 10:37   ` Andi Kleen [this message]
2007-12-07  8:45 ` [PATCH] scheduler: fix x86 regression in native_sched_clock Ingo Molnar
2007-12-07 10:32   ` Andrew Morton
2007-12-07 10:40     ` Ingo Molnar
2007-12-07 11:07       ` Ingo Molnar
2007-12-07 11:09       ` Andrew Morton
2007-12-07 11:12         ` Ingo Molnar
2007-12-07 11:13   ` Nick Piggin
2007-12-07 11:17     ` Ingo Molnar
2007-12-07 16:48       ` Nick Piggin
2007-12-08  0:50         ` Nick Piggin
2007-12-08  0:57           ` Nick Piggin
2007-12-08  8:52             ` Ingo Molnar
2007-12-08 23:37               ` Guillaume Chazarain
2007-12-12  4:42               ` Nick Piggin
2007-12-12 10:44                 ` Ingo Molnar
2007-12-07 11:18     ` Guillaume Chazarain
2007-12-07 11:57       ` Guillaume Chazarain
2007-12-07 11:23     ` stefano.brivio
2007-12-07 12:11       ` Ingo Molnar
2007-12-07 12:25       ` Ingo Molnar
2007-12-07 12:35         ` Ingo Molnar
2007-12-07 12:40           ` Ingo Molnar
2007-12-07 14:54             ` Ingo Molnar
2007-12-07 16:46               ` Guillaume Chazarain
2007-12-07 17:57                 ` Ingo Molnar
2007-12-08 15:06                   ` Mark Lord
2007-12-08 15:13                     ` Ingo Molnar
2007-12-08 15:27                       ` Michael Buesch
2007-12-08 15:33                         ` Ingo Molnar
2007-12-08 15:36                           ` Michael Buesch
2007-12-08 15:41                             ` Ingo Molnar
2007-12-07 11:24     ` Ingo Molnar

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