From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, "Jack O'Quin" <joq@io.com>
Subject: Re: Latency tests with 2.6.12-rc1
Date: Wed, 23 Mar 2005 17:12:41 -0500 [thread overview]
Message-ID: <1111615961.3377.3.camel@mindpipe> (raw)
In-Reply-To: <20050322082222.GB9497@elte.hu>
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On Tue, 2005-03-22 at 09:22 +0100, Ingo Molnar wrote:
> hm, weird, and i have no solution for this yet. But i just found a
> related bug in the -RT patch in that it reverted a latency breaker in
> the ext3 path that your trace shows - affecting PREEMPT_DESKTOP. Could
> you try the 40-03 patch i just uploaded (assuming it's stable for you
> otherwise ...) and see whether you can still reproduce these latencies?
> (if yes then please also send me a full trace via private mail, or bzip
> -9 it in your public mail.)
Ingo,
The problem is fixed. Now the longest latency I see with "dbench 16"
and PREEMPT_DESKTOP is 591us in the ext3 reservation code. Trace is
attached (compressed) in case anyone is interested. But I do not
consider anything under a millisecond to be a problem with
PREEMPT_DESKTOP.
Lee
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next prev parent reply other threads:[~2005-03-23 22:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-19 4:03 Latency tests with 2.6.12-rc1 Lee Revell
2005-03-19 7:08 ` Ingo Molnar
2005-03-19 7:51 ` Lee Revell
2005-03-19 21:56 ` Lee Revell
2005-03-22 8:22 ` Ingo Molnar
2005-03-23 22:12 ` Lee Revell [this message]
2005-03-24 17:13 ` Lee Revell
2005-03-31 8:02 ` Ingo Molnar
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