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From: Kevin Hilman <kjh-lkml@hilman.org>
To: linux-kernel@vger.kernel.org
Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R6
Date: 07 Sep 2004 21:22:11 -0700	[thread overview]
Message-ID: <834qm92xvw.fsf@www2.muking.org> (raw)

I'm running the VP patch on a PII 400MHz to closer approximate an
embedded target.  I get a 21ms latency trace during boot which dwarfs
other latencies and prevents me from seeing any of the later latencies
when I'm running my test.  The trace (from -R5) is available here:

  http://hilman.org/kevin/VP/trace-cond_resched.txt

At first glance, it appears to be the result of an accumulation of
calls to __delay() from the 3c59x vortex driver.  Any ideas what's
going on here?

Is there a way to disable the trace by default and enable it later via
/proc?  I see that the preemption itself can be disabled via
command-line and then enable later via /proc but I don't see the same
for the latency trace.

Kevin
http://hilman.org/


             reply	other threads:[~2004-09-08  4:22 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-09-08  4:22 Kevin Hilman [this message]
2004-09-08  6:39 ` Lee Revell
     [not found] <20040903120957.00665413@mango.fruits.de>
2004-09-04 19:51 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-R4 Ingo Molnar
2004-09-05 14:02   ` [patch] voluntary-preempt-2.6.9-rc1-bk12-R5 Ingo Molnar
2004-09-06 11:06     ` [patch] voluntary-preempt-2.6.9-rc1-bk12-R6 Ingo Molnar
2004-09-06 11:48       ` Rafael J. Wysocki
2004-09-06 12:25         ` Alexander Nyberg
2004-09-06 12:29           ` Ingo Molnar
2004-09-08  6:56       ` Lee Revell
2004-09-09 19:29         ` Ingo Molnar
2004-09-09 19:33           ` Lee Revell
2004-09-09 20:43             ` Lee Revell
2004-09-09 20:51               ` Ingo Molnar
2004-09-09 21:03               ` Scott Wood
2004-09-09 20:05           ` Andrew Morton
2004-09-09 20:09             ` Alan Cox
2004-09-09 21:28               ` Andrew Morton
2004-09-09 22:45             ` William Lee Irwin III
2004-09-09 22:11               ` Alan Cox
2004-09-09 23:20                 ` William Lee Irwin III
2004-09-10 13:28             ` Ingo Molnar
2004-09-10 14:28               ` Paolo Ciarrocchi
2004-09-10 16:45                 ` Lee Revell
2004-09-10 22:54               ` Lee Revell
2004-09-11  0:21                 ` K.R. Foley
2004-09-09 20:13           ` Lee Revell
2004-09-22  0:17           ` William Lee Irwin III

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