Date: Wed, 04 Apr 2012 01:32:13 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: RAR OpenCL committed to git On 04/04/2012 01:11 AM, Solar Designer wrote: > 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 What's that "No protocol" stuff? > 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 > AES-NI? Strange. No, AES-NI won't make any difference for short blocks like -hp mode or the tiny inlined -p mode files, nor will OMP. I would expect an overclocked 570 to be similar to a 580. Note that the usual LWS/KPC environment variables and/or john.conf options can be used (but there's currently no find-best enumeration built in if setting them to zero). I got best result (but with long runtime) from LWS=576 KPC=9216 magnum
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