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

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Message-ID: <1290130891.30543.127.camel@gandalf.stny.rr.com>
Date:	Thu, 18 Nov 2010 20:41:31 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Michael Rubin <mrubin@...gle.com>
Cc:	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: Benchmarks of kernel tracing options (ftrace and ktrace)

On Thu, 2010-11-18 at 17:11 -0800, Michael Rubin wrote:

> > I did tell him that some ring buffer improvements did make it into the
> > kernel. You might want to try the latest mainline again.
> 
> You told me that you had patches (in 2.6.37) I think that would allow
> us to specifically improve the syscall tracing performance.
> 
> Can you point us at em?

Look at commits:

afcc5c6872f0215d515a637041bb51f8691a8ea7
69d1b839f7eee347e357b3f6cce7f630cc6ff93d
140ff89127c74b1b1c1b0152a36ea3720ccf6bc3
d9abde2138e0a00a0d7e44676928efa0ef629d48
b8b2663bd7c9da04ac804659b9f617c199d0252c

-- Steve


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