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Message-ID: <20120328004032.GE19375@openwall.com>
Date: Wed, 28 Mar 2012 04:40:32 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: rawsha256.cu patch(using shared memory)
Lukas -
Thank you for your help with the discussions around GSoC.
On Tue, Mar 27, 2012 at 05:51:40PM +0200, Lukas Odzioba wrote:
> I should have somewhere old version much faster than that.
Oh, old version. This explains the faster benchmarks on the wiki.
Why don't you get that faster version into magnum-jumbo, then? Does the
new version have some other advantage?
> Attacking worst optimized format is not a good idea if you want show
> your abilities.
I guess myrice was not aware that this was considered the worst
optimized format, and going after a low hanging fruit makes sense in
many cases (maybe not to show one's abilities, though).
> First of all you must decide will you apply for slow, or fast hashes.
> Those are DIFFERENT tasks with different needs.
Yes, but I'm fine with people trying both briefly to get a better
feeling of that. ;-) Otherwise they won't make an informed decision on
what to apply for.
> Please do not post multiple results for the same format, choose top1
> or avg if you want.
BTW, the relbench script may be used to compare two sets of results
(with multiple invocations of each version of the program):
http://www.openwall.com/lists/john-dev/2011/12/14/1
(this demonstrates it for an OpenMP setting, but the same approach can
be applied to different source code revisions and CUDA/OpenCL).
For these highly unoptimized formats, we're looking for such major
differences in speed that this fine benchmarking is not necessary,
though. So raw output should better be posted.
Alexander
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