linux-kernel - Re: [PATCH] procfs: export context switch counts in /proc/*/stat

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Message-Id: <1166626290.3365.1412.camel@laptopd505.fenrus.org>
Date:	Wed, 20 Dec 2006 15:51:29 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	David Wragg <david@...gg.org>
Cc:	Albert Cahalan <acahalan@...il.com>, linux-kernel@...r.kernel.org,
	bcrl@...ck.org
Subject: Re: [PATCH] procfs: export context switch counts in /proc/*/stat

On Wed, 2006-12-20 at 14:38 +0000, David Wragg wrote:
> Arjan van de Ven <arjan@...radead.org> writes:
> > if all you care is the number of context switches, you can use the
> > following system tap script as well:
> >
> > http://www.fenrus.org/cstop.stp
> 
> Thanks, something similar to that might well have solved my original
> problem.  
> 
> (When I try the script, stap complains about the lack of the kernel
> debuginfo package, which of course doesn't exist for my self-built
> kernel.  After hunting around on the web for 10 minutes, I'm still no
> closer to resolving this.  But I look forward to playing with
> systemtap once I get past that problem.)

what worked for me is copying the "vmlinux" file to /boot as
/boot/vmlinux-`uname -r`

(strace the stap program to see what it tries to load)



-- 
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