linux-kernel - Re: [PATCH] hwlat_detector: Detect hardware-induced latencies

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Message-ID: <20150409101037.4dd0837a@gandalf.local.home>
Date:	Thu, 9 Apr 2015 10:10:37 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Carsten Emde <C.Emde@...dl.org>
Cc:	Daniel Wagner <daniel.wagner@...-carit.de>,
	linux-rt-users@...r.kernel.org, Jon Masters <jcm@...hat.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux-kernel@...r.kernel.org,
	Tom Zanussi <tom.zanussi@...ux.intel.com>
Subject: Re: [PATCH] hwlat_detector: Detect hardware-induced latencies

On Thu, 09 Apr 2015 15:46:12 +0200
Carsten Emde <C.Emde@...dl.org> wrote:

> Hi Daniel,
> 
> > BTW, are you also taking care of the latency-hist.patch patch?
> I do.
> 
> However, the request (and the challenge) is not to simply rewrite the 
> code. The idea is to provide a general histogram framework that can be 
> used from anywhere in the kernel and to equip it with everything needed 
> by the existing histograms. This framework should no longer be part of 
> the RT patches but submitted directly to mainline Linux. In a second 
> step, we will then rewrite the existing histogram code to use the new 
> framework.
> 
> Any help is greatly appreciated!

Hmm, Currently Tom Zanussi is working on a hist trigger for tracing.
Not sure it can be used here, but perhaps ideas can be spawned.

http://marc.info/?l=linux-kernel&m=142807630917288

-- Steve
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