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Date: Wed, 4 Apr 2012 03:11:53 +0400
From: Solar Designer <>
Subject: Re: RAR OpenCL committed to git

On Wed, Apr 04, 2012 at 12:23:17AM +0200, magnum wrote:
> On a GTX580, it currently does around 4000 c/s in -hp mode (cRARk OpenCL
> does ~5500 c/s using same card). I got it to 4500 c/s by moving GPU
> arrays to __local memory but then the self-test fails (although no
> warnings from building etc - I hate that) and I have no idea what is
> wrong. On an old 9600GT, I get 290 c/s.

user@...l:~/john/magnum-jumbo/src$ ../run/john -te -fo=rar
No protocol specified
No protocol specified
OpenCL platform 0: NVIDIA CUDA, 1 device(s).
Using device 0: GeForce GTX 570
Max local work size 576, best multiple 32
Local work size (LWS) 512, Keys per crypt (KPC) 8192
AES-NI engine not available
Benchmarking: RAR3 (6 characters) [OpenCL]... (8xOMP) DONE
Raw:    2269 c/s real, 2079 c/s virtual

I wonder if something needs to be re-tuned for GTX 570.  It shouldn't be
that much slower than 580.  Oh, maybe your 4000 c/s is for a system with

CPU usage during the above test was at around 120% (a little more than
one core in use on average).  There's clearly room for improvement here.



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