Date: Tue, 1 May 2012 09:04:20 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: Lukas - status report #2 Lukas - On Tue, May 01, 2012 at 08:37:02AM +0400, Solar Designer wrote: > On Tue, May 01, 2012 at 06:13:01AM +0200, Lukas Odzioba wrote: > > 2012/5/1 Solar Designer <solar@...nwall.com>: > > > user@...l:~/john/magnum-jumbo/run$ ./john -te -fo=wpapsk-opencl -pla=1 > > > OpenCL platform 1: AMD Accelerated Parallel Processing, 2 device(s). > > > Using device 0: Tahiti > > > Optimal Group work Size = 128 > > > Benchmarking: wpapsk-opencl [pbkdf2-sha1]... DONE > > > Raw: 64000 c/s real, 531692 c/s virtual > > > > > > This is quite nice. hashcat is reported to do 158.1k c/s on 5970, so > > > our target speed for 7970 may be about 130k c/s. > > > > I would be more happy to see 80-90k, previously (just pmk calculation > > - most time consuming) we had 90% of hashcat's speed. For now > > difference will be ever worst for super fast gpus and slow cpu. > > Besides cpu side code utilizes only 1 core. Do you have any ideas to > > get around it other than MPI? On the other side we could move all code > > to second kernel gpu. > > I don't understand what you're referring to. I just took a look at > opencl_wpapsk_fmt.c and I don't see it doing much on the CPU. Can you > point me at specific places in the code? > > Do you think my run on the 7970 was somehow CPU-bound? I doubt it. I tested and looked at the code in magnum-jumbo from a few hours ago. It turns out that you made an important commit in those hours. I'll re-test and re-review. Alexander
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