From: Anton Blanchard <anton@samba.org>
To: Andrew Morton <akpm@osdl.org>
Cc: John Levon <levon@movementarian.org>,
oprofile-list@lists.sourceforge.net,
linux-kernel@vger.kernel.org, jbarnes@sgi.com,
phil.el@wanadoo.fr
Subject: Re: [PATCH] improve OProfile on many-way systems
Date: Sun, 22 Aug 2004 13:50:34 +1000 [thread overview]
Message-ID: <20040822035034.GA8702@krispykreme> (raw)
In-Reply-To: <20040821163628.10cfa049.akpm@osdl.org>
> Anyway. My question was mainly a prod in the antonward direction ;)
And Im prepared this time :) An excerpt from my test results a few
months ago:
> I ran a fork/exit intensive benchmark (sdet) on a big machine.
>
> No patch:
> Enabling oprofile resulted in over a 10 times slow down in performance.
>
> oprofile1.patch:
> About 2% slowdown when oprofile enabled
>
> oprofile2.patch:
> About 5% slowdown when oprofile enabled
The final version was actually oprofile3.patch but it had a similar (10
times) gain in sdet performance.
So the patch is good stuff. Ive been running it locally for the last few
months without a problem.
Anton
prev parent reply other threads:[~2004-08-22 3:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-21 19:26 [PATCH] improve OProfile on many-way systems John Levon
2004-08-21 20:58 ` Andrew Morton
2004-08-21 22:06 ` Jesse Barnes
2004-08-21 23:14 ` John Levon
2004-08-22 4:34 ` Anton Blanchard
2004-08-24 0:07 ` John Levon
2004-08-21 23:22 ` John Levon
2004-08-21 23:36 ` Andrew Morton
2004-08-21 23:55 ` John Levon
2004-08-22 4:41 ` Andrew Morton
2004-08-22 22:42 ` John Levon
2004-08-22 3:50 ` Anton Blanchard [this message]
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