linux-kernel - Re: [BUG] Strange 1-second pauses during Resume-from-RAM

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Message-ID: <20071202195501.GB10657@lazybastard.org>
Date:	Sun, 2 Dec 2007 20:55:02 +0100
From:	Jörn Engel <joern@...fs.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jörn Engel <joern@...fs.org>,
	Mark Lord <lkml@....ca>, Pavel Machek <pavel@....cz>,
	Mark Lord <liml@....ca>, Thomas Gleixner <tglx@...utronix.de>,
	len.brown@...el.com, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	rjw@...k.pl
Subject: Re: [BUG] Strange 1-second pauses during Resume-from-RAM

On Sun, 2 December 2007 16:47:46 +0100, Ingo Molnar wrote:
> 
> well what does the trace say, where do the delays come from? To get a 
> quick overview you can make tracing lighter weight by doing:
> 
>  echo 0 > /proc/sys/kernel/mcount_enabled
>  echo 1 > /proc/sys/kernel/trace_syscalls

I mistyped and did 
 echo 1 > /proc/sys/kernel/mcount_enabled

Result looked like a livelock and finally convinced me to abandon the
latency tracer.  Sorry, but it appears to be the right tool for the
wrong job.

Jörn

-- 
They laughed at Galileo.  They laughed at Copernicus.  They laughed at
Columbus. But remember, they also laughed at Bozo the Clown.
-- unknown
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