From: Andi Kleen <ak@suse.de>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] AES for CryptoAPI - i586-optimized
Date: 08 Jul 2003 19:12:27 +0200 [thread overview]
Message-ID: <p737k6tq6x0.fsf@oldwotan.suse.de> (raw)
In-Reply-To: <20030708174907.A18997@infradead.org.suse.lists.linux.kernel>
Christoph Hellwig <hch@infradead.org> writes:
> On Tue, Jul 08, 2003 at 05:27:55PM +0200, Fruhwirth Clemens wrote:
> >
> > Due to the recent discussion about the asm-optimized version of AES which is
> > included in loop-AES, I'd like to point out that I've ported this
> > implementation - Dr. Brian Gladman's btw. - to CryptoAPI a long time ago.
>
> Cool, that means we just need to hash out the framework for optimized
> implementations now..
It's not cool. Pentium Classic tuning is quite useless for PPro+
The Pentium Classic had a quite weird pipeline and code optimized
for it tends to be suboptimal for more modern designs.
I didn't benchmark, but I suspect the C version compiled with a good compiler
for the correct CPU is faster than that on a modern CPU.
-Andi
next parent reply other threads:[~2003-07-08 16:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20030708152755.GA24331@ghanima.endorphin.org.suse.lists.linux.kernel>
[not found] ` <20030708174907.A18997@infradead.org.suse.lists.linux.kernel>
2003-07-08 17:12 ` Andi Kleen [this message]
2003-07-08 17:28 ` Jeff Garzik
2003-07-08 19:16 ` Andi Kleen
2003-07-22 1:17 Jason Papadopoulos
-- strict thread matches above, loose matches on Subject: below --
2003-07-08 15:27 Fruhwirth Clemens
2003-07-08 16:49 ` Christoph Hellwig
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