linux-kernel - LTTng 0.91 optimizes data copy primitives

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Message-ID: <20090203191847.GA27522@Krystal>
Date:	Tue, 3 Feb 2009 14:18:47 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	ltt-dev@...ts.casi.polymtl.ca, linux-kernel@...r.kernel.org
Subject: LTTng 0.91 optimizes data copy primitives

Hi,

I just released LTTng 0.91 in which I've had a 20% performance increase
when tracing in flight recorder mode when compiling a kernel by creating
an inlined optimized (memcpy-less for 1, 2, 4, and 8 bytes) fast path
for the low-level data copy primitive.

Here is the commit :

http://git.kernel.org/?p=linux/kernel/git/compudj/linux-2.6-lttng.git;a=commit;h=5bb4bb6814709fd35bcefcd460da3c66b0f639fb

Mathieu


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Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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