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Message-ID: <20130617042510.GA29422@openwall.com>
Date: Mon, 17 Jun 2013 08:25:10 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: PBKDF2-SHA512
On Mon, Jun 17, 2013 at 06:16:42AM +0200, Lukas Odzioba wrote:
> 2013/6/17 Solar Designer <solar@...nwall.com>:
> > I think you're comparing one core with C+intrinsics vs. all cores with
> > OpenCL. Try building with OpenMP enabled for a more relevant comparison.
>
> I am not even using OpenCL. I attached the code just to show the idea
> - it does not have proper valid and other problems - to crappy and not
> heavily tested to be commited.
> Also I belive that speed could be improved by at least 10% using our
> pbkdf2-sha1 tricks and then doubled by proper sse code.
Oh, so you're saying that both of your benchmarks were for one core, and
that our pbkdf2_sha512_sse() in bleeding still does not implement all of
the usual PBKDF2 tricks, even though it does bother to use SIMD and
OpenMP. Is that correct? If so, we should optimize pbkdf2_sha512_sse()
further. (I haven't looked at the code yet.)
Alexander
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