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Message-ID: <20121007192814.GB5182@openwall.com>
Date: Sun, 7 Oct 2012 23:28:14 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: CUDA tweaking to your actual GPU
magnum -
Thank you for running these tests!
On Sat, Oct 06, 2012 at 04:15:23PM +0200, magnum wrote:
> - This test should also include tweaking BLOCKS and THREADS but everything was left at default. Some auto-homing like we do in OpenCL should be fairly high priority for CUDA. The outcome *may* be totally different with optimal values.
Yes, or at least we should determine and document optimal settings for
some common GPUs. I think that GTX 570/580/590 are most important now
(of NVIDIA's), so maybe the defaults should be tuned for these, if we
have compile-time defaults at all. Maybe we should do that even if we
keep the default arch type at sm_10 for compatibility with much older
GPUs, or maybe we should make the default arch type sm_20 (and accept
that owners of much older GPUs will absolutely have to change that).
Alexander
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