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From: Pavel Machek <pavel@suse.cz>
To: Jamie Lokier <lk@tantalophile.demon.co.uk>, Steve Grubb <ddata@gate.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Patch] performance enhancement for simple_strtoul
Date: Thu, 21 Dec 2000 21:06:37 +0100	[thread overview]
Message-ID: <20001221210637.C1545@bug.ucw.cz> (raw)
In-Reply-To: <000e01c06a8e$6945db60$bc1a24cf@master> <20001220100446.A1249@inetnebr.com> <001401c06ab4$ac8615e0$7d1a24cf@master> <20001221010935.A22817@pcep-jamie.cern.ch>
In-Reply-To: <20001221010935.A22817@pcep-jamie.cern.ch>; from Jamie Lokier on Thu, Dec 21, 2000 at 01:09:35AM +0100

Hi!

> > 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?

On second thought, ps -auxl maybe stresses simple_strtoul a little
bit. Not sure.

> Sounds like the neatest trick would be reducing bytes used here...

								Pavel
-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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  reply	other threads:[~2000-12-22 10:32 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-12-20 14:09 [Patch] performance enhancement for simple_strtoul 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
2000-12-21 20:06       ` Pavel Machek [this message]
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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