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Date: Tue, 10 Aug 2004 12:12:32 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Florian Schmidt <mista.tapas@gmx.net>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>,
       William Lee Irwin III <wli@holomorphy.com>
Subject: Re: [patch] voluntary-preempt-2.6.8-rc3-O4
Message-ID: <20040810101232.GA2706@elte.hu>
References: <20040726204720.GA26561@elte.hu> <20040729222657.GA10449@elte.hu> <20040801193043.GA20277@elte.hu> <20040809104649.GA13299@elte.hu> <20040809130558.GA17725@elte.hu> <20040809190201.64dab6ea@mango.fruits.de> <1092103522.761.2.camel@mindpipe> <1092117141.761.15.camel@mindpipe> <20040810080933.GA26081@elte.hu> <1092125864.848.2.camel@mindpipe>
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i've uploaded a new version of the preempt-timing patch:

  http://redhat.com/~mingo/voluntary-preempt/preempt-timing-on-2.6.8-rc3-O4.patch

this patch fixes a number of false positives and false negatives. In
particular it fixes the idle-task false positives, and it now correctly
measures preemption delays in softirq and hardirq contexts and in
bh-disabled process contexts. Maybe this sheds a light on some of the
more mysterious delays that we've seen. (and which were never directly
measured before.)

(the patch also got alot simpler, which should help portability.)

	Ingo