linux-kernel - Re: [ANNOUNCE] New utility: 'trace'

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Message-ID: <AANLkTi=1zYp7NsWy36Tg5Hwz4h0co3mMgeYAWZ4HasZo@mail.gmail.com>
Date:	Wed, 17 Nov 2010 14:00:39 -0500
From:	Bob Copeland <me@...copeland.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"Ted Ts'o" <tytso@....edu>, Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Jason Baron <jbaron@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Christoph Hellwig <hch@....de>,
	Pekka Enberg <penberg@...nel.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [ANNOUNCE] New utility: 'trace'

On Tue, Nov 16, 2010 at 10:34 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> (*) Currently in trace-cmd I have plugins. These plugins are simple
> functions to read events and either output better displays of the event
> or do something special (Avi wrote some for his kvm events).

We also use this for debugging some wireless drivers.  The (unstable)
raw events can capture entire packets and produce psuedo-pcap files with
a plugin so we can compare what we thought went over the air versus what
actually did, and correlate them with api-level tracepoints in upper
layers.  It's perhaps a bit of a bending of the infrastructure, but one
that has been helpful.

-- 
Bob Copeland %% www.bobcopeland.com
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