linux-kernel - Re: Benchmarks of kernel tracing options (ftrace and ktrace)

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Message-ID: <1289950335.30543.8.camel@gandalf.stny.rr.com>
Date:	Tue, 16 Nov 2010 18:32:15 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Sharp <dhsharp@...gle.com>
Cc:	linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Rubin <mrubin@...gle.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: Benchmarks of kernel tracing options (ftrace and ktrace)

On Tue, 2010-11-16 at 15:27 -0800, David Sharp wrote:

> Steve, Mike told me that you may have some patches to improve overhead
> of syscall tracing. I'd be interested in testing them. Can you send
> them my way?

Mike may have been confused ;-)

I did tell him that some ring buffer improvements did make it into the
kernel. You might want to try the latest mainline again.

I even have other patches that might help. I'll have to go and dig them
up.

-- Steve


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