From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Steve Grubb <ddata@gate.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Patch] performance enhancement for simple_strtoul
Date: Thu, 21 Dec 2000 01:09:35 +0100 [thread overview]
Message-ID: <20001221010935.A22817@pcep-jamie.cern.ch> (raw)
In-Reply-To: <000e01c06a8e$6945db60$bc1a24cf@master> <20001220100446.A1249@inetnebr.com> <001401c06ab4$ac8615e0$7d1a24cf@master>
In-Reply-To: <001401c06ab4$ac8615e0$7d1a24cf@master>; from ddata@gate.net on Wed, Dec 20, 2000 at 01:42:56PM -0500
Steve Grubb wrote:
> It seems gcc creates much better code with the variables set to register
> types.
Curious. GCC should be generating the same code regardless; ah well.
Is strtoul actually used in the kernel other than for the occasional
(rare) write to /proc/sys and parsing boot options?
> But this is the kernel and there are people that would reject my patch
> purely on the basis that it adds precious bytes to the kernel.
Perhaps I am mistaken but I'd expect it to be called what, ten times at
boot time, and a couple of times when X loads the MTRRs?
Sounds like the neatest trick would be reducing bytes used here...
-- Jamie
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next prev parent reply other threads:[~2000-12-21 0:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-12-20 14:09 Steve Grubb
2000-12-20 16:04 ` Jeff Epler
2000-12-20 16:35 ` Steve Grubb
2000-12-20 18:42 ` Steve Grubb
2000-12-21 0:09 ` Jamie Lokier [this message]
2000-12-21 20:06 ` Pavel Machek
2000-12-28 5:15 ` Jamie Lokier
2000-12-21 9:16 ` Matthias Andree
2000-12-21 10:28 ` Bernd Schmidt
2000-12-21 16:07 ` Alan Cox
2000-12-21 20:05 ` Pavel Machek
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