From: "K.R. Foley" <kr@cybsft.com>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Ingo Molnar <mingo@elte.hu>, Scott Wood <scott@timesys.com>,
manas.saksena@timesys.com,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [patch] voluntary-preempt-2.6.8.1-P9
Date: Wed, 25 Aug 2004 11:00:15 -0500 [thread overview]
Message-ID: <412CB78F.9020000@cybsft.com> (raw)
In-Reply-To: <1093404161.5678.12.camel@krustophenia.net>
Lee Revell wrote:
> On Tue, 2004-08-24 at 23:17, K.R. Foley wrote:
>
>>Ingo Molnar wrote:
>>
>>> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P9
>>>
>
>
>>latency trace of ~148 usec in scsi_request? I don't know if this is real
>>or not. Note the 79 usec here:
>>
>>00000001 0.107ms (+0.079ms): sd_init_command (scsi_prep_fn)
>>
>>Entire trace is here:
>>
>>http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace7.txt
>>
>>
>>Is this possible? This is not the first time I have seen this. There is
>>another one here:
>>
>>http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace5.txt
>>
>
>
> This looks like a real latency. What is
> /sys/block/sdX/queue/max_sectors_kb set to? Does lowering it help?
>
> Lee
>
>
Well I had no sooner sent the last message and another one of these
popped up. This one is 123 usec:
http://www.cybsft.com/testresults/2.6.8.1-P9/latency_trace12.txt
kr
next prev parent reply other threads:[~2004-08-25 16:00 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-23 22:18 [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-24 6:14 ` [patch] voluntary-preempt-2.6.8.1-P9 Ingo Molnar
2004-08-24 17:43 ` K.R. Foley
2004-08-24 20:32 ` Lee Revell
2004-08-24 20:53 ` Scott Wood
2004-08-24 19:20 ` K.R. Foley
2004-08-24 22:47 ` Lee Revell
2004-08-25 2:00 ` Lee Revell
2004-08-25 3:17 ` K.R. Foley
2004-08-25 3:22 ` Lee Revell
2004-08-25 14:34 ` K.R. Foley
2004-08-25 16:00 ` K.R. Foley [this message]
2004-08-25 3:26 ` K.R. Foley
2004-08-25 9:58 ` [patch] voluntary-preempt-2.6.8.1-P9 : oprofile latency at 3.3ms P.O. Gaillard
2004-08-26 21:39 ` [patch] voluntary-preempt-2.6.8.1-P9 Lee Revell
2004-08-27 16:54 ` Lee Revell
2004-08-28 7:37 ` Ingo Molnar
2004-08-28 15:10 ` Lee Revell
2004-08-28 12:14 ` Ingo Molnar
2004-08-30 9:27 ` voluntary-preempt-2.6.8.1-P9 : big latency when logging on console P.O. Gaillard
2004-08-30 9:41 ` Ingo Molnar
2004-08-30 12:25 ` P.O. Gaillard
2004-08-30 9:48 ` [patch] voluntary-preempt-2.6.8.1-P9 : a few submillisecond latencies P.O. Gaillard
2004-08-28 12:03 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q0 Ingo Molnar
2004-08-28 16:18 ` Felipe Alfaro Solana
2004-08-28 16:50 ` K.R. Foley
2004-08-28 17:52 ` Lee Revell
2004-08-28 19:44 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q2 Ingo Molnar
2004-08-28 20:01 ` Lee Revell
2004-08-28 20:04 ` Ingo Molnar
2004-08-28 20:08 ` Lee Revell
2004-08-28 20:10 ` Daniel Schmitt
2004-08-28 20:31 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-28 21:10 ` Lee Revell
2004-08-28 21:13 ` Ingo Molnar
2004-08-28 21:16 ` Lee Revell
2004-08-28 23:51 ` Lee Revell
2004-08-29 2:35 ` Lee Revell
2004-08-29 5:43 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q4 Ingo Molnar
2004-08-29 6:57 ` Lee Revell
2004-08-29 18:01 ` Ingo Molnar
2004-08-29 19:06 ` Ingo Molnar
2004-08-30 0:47 ` K.R. Foley
2004-08-30 3:42 ` K.R. Foley
2004-08-30 13:06 ` Alan Cox
2004-08-30 17:37 ` Ingo Molnar
2004-08-31 16:39 ` K.R. Foley
2004-08-30 9:06 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 Ingo Molnar
2004-08-30 14:25 ` Thomas Charbonnel
2004-08-30 18:00 ` Ingo Molnar
2004-08-31 19:23 ` Thomas Charbonnel
2004-08-31 19:30 ` Ingo Molnar
2004-08-31 19:45 ` Thomas Charbonnel
2004-08-31 6:40 ` Lee Revell
2004-08-31 6:53 ` Ingo Molnar
2004-08-31 23:03 ` Lee Revell
2004-09-01 15:52 ` Martin Josefsson
2004-09-01 21:15 ` Lee Revell
2004-09-01 21:30 ` Lee Revell
2004-08-31 7:06 ` Ingo Molnar
2004-08-31 19:21 ` Lee Revell
2004-08-31 19:37 ` Ingo Molnar
2004-08-31 19:47 ` Lee Revell
2004-08-31 19:51 ` Ingo Molnar
2004-08-31 20:09 ` Ingo Molnar
2004-08-31 20:10 ` Lee Revell
2004-08-31 20:14 ` Ingo Molnar
2004-08-31 20:20 ` Ingo Molnar
2004-08-31 20:34 ` Lee Revell
2004-08-31 20:39 ` Ingo Molnar
2004-08-31 20:41 ` Lee Revell
2004-08-31 17:40 ` Peter Zijlstra
2004-09-01 1:43 ` Lee Revell
2004-09-01 2:30 ` Lee Revell
2004-09-01 7:27 ` Lee Revell
2004-09-01 8:29 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q6 Ingo Molnar
2004-09-01 13:51 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q7 Ingo Molnar
2004-09-01 17:09 ` Thomas Charbonnel
2004-09-01 19:03 ` K.R. Foley
2004-09-01 20:11 ` Peter Zijlstra
2004-09-01 20:16 ` Lee Revell
2004-09-01 20:53 ` K.R. Foley
[not found] ` <41367E5D.3040605@cybsft.com>
2004-09-02 5:37 ` Ingo Molnar
2004-09-02 5:40 ` Ingo Molnar
2004-08-30 12:52 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-29 7:40 ` Matt Heler
2004-08-24 19:51 ` [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-26 3:17 ` Lee Revell
2004-08-26 16:38 ` Scott Wood
2004-08-27 1:18 ` Fernando Pablo Lopez-Lezcano
2004-08-28 12:36 ` Ingo Molnar
2004-08-28 13:01 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q1 Ingo Molnar
2004-08-30 1:06 ` Fernando Pablo Lopez-Lezcano
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