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Subject: Re: Slight optimizations to entry.S patch
To: akhripin@mit.edu (Alex)
Date: Fri, 21 Dec 2001 16:49:54 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20011220223221.GA17913@morgoth.mit.edu> from "Alex" at Dec 20, 2001 05:32:21 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> I was familiarizing (or trying to) myself with the i386 architecture code,
> and saw a few possible optimizations. I think they can save a few cycles (not
> that many). Can someone comment? Are the changes worthwhile?

Measure them and see - look at the rdtsc instruction, run a million
iterations of all the various variants and see what you find
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