linux-kernel - Re: [PATCH 11/18] i915: Provide config option for enabling tracepoints

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Date:	Tue, 23 Mar 2010 08:42:34 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Jan Kara <jack@...e.cz>, LKML <linux-kernel@...r.kernel.org>
Cc:	dri-devel@...ts.sourceforge.net, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 11/18] i915: Provide config option for enabling tracepoints

Out of curiosity what motivated this patch? When adding the tracepoints,
I found the overhead of compiling in but not enabling them to be
insignificant, i.e. nearly unmeasurable in throughput benchmarks, so
didn't believe it warranted a config option. Especially one that advises
people to turn off what may be a useful aid in desktop systems.

Also is TRACER the right name, that would seem to confuse the option with
a standalone tracer as opposed to simply enabling tracepoints.
-ickle

-- 
Chris Wilson, Intel Open Source Technology Centre
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