linux-kernel - Re: [PATCH 0/5] [RFC] binary reading of ftrace ring buffers

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Date:	Wed, 4 Mar 2009 23:47:14 +0100
From:	Ingo Oeser <ioe-lkml@...eria.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Pekka Paalanen <pq@....fi>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Martin Bligh <mbligh@...gle.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Jason Baron <jbaron@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Jiaying Zhang <jiayingz@...gle.com>,
	"Eduard - Gabriel Munteanu" <eduard.munteanu@...ux360.ro>,
	mrubin@...gle.com, md@...gle.com
Subject: Re: [PATCH 0/5] [RFC] binary reading of ftrace ring buffers

Hi Steven,

On Wednesday 04 March 2009, Steven Rostedt wrote:
> On Wed, 4 Mar 2009, Ingo Molnar wrote:
> > Any chance of merging them into a single perl script? I.e. the 
> > perl script would embedd the .c code and build it on every 
> > invocation (into /tmp), so that one can do single-tool tracing 
> > with no immediate binary components. Such self-sufficiency is 
> > very handy when probing systems in a minimally invasive way.
> > 
> > And we could also have twice the ugliness for the same price.
> > 
> 
> Gag, that would really be ugly code ;-)

If you want really ugly code, you could do the SYS_splice in perl
via syscall. Just look it up via "perldoc -f syscall" and play around :-)

Best Regards

Ingo Oeser
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