linux-kernel - Re: [Question] Hooks for scheduler tracing (CFS)

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Message-ID: <3efb10970707161317h72b30aabq208150b2abde8e5e@mail.gmail.com>
Date:	Mon, 16 Jul 2007 22:17:08 +0200
From:	"Remy Bohmer" <l.pinguin@...il.com>
To:	"Arjan van de Ven" <arjan@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	RT-Users <linux-rt-users@...r.kernel.org>,
	mathieu.desnoyers@...ymtl.ca, "Ingo Molnar" <mingo@...e.hu>
Subject: Re: [Question] Hooks for scheduler tracing (CFS)

Hello Arjan,

Thanks for this suggestion.
But I looked at Systemtap before, and as I remember, it is very
flexible, but it only traces function calls. (or am I missing
something?)
I also need this scheduler-tracer, besides for fully fledged X86
systems, also for ARM based boards also with a very minimal userland,
and limited flash. So, it has to be lightweight also. I can only use
cross-compilers to build the tools... (something Systemtap is not good
at as I remember...)

So, I am missing something here, or it is unfortunately not what I am
looking for...


Kind Regards,

Remy


2007/7/16, Arjan van de Ven <arjan@...radead.org>:
> On Mon, 2007-07-16 at 21:46 +0200, Remy Bohmer wrote:
> > So I was wondering if anybody knows some tool/kernel mechanism which
> > can do this?
> > If not, I will build a kernel extension for it myself (new extension
> > to 'latency_trace' ?)
>
> systemtap has been able to do such things for me in the past...
>
> --
> if you want to mail me at work (you don't), use arjan (at)
> linux.intel.com
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> http://www.linuxfirmwarekit.org
>
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