Date: Thu, 24 May 2012 23:11:46 +0200 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Can Excessive Rounds make Password cracking Infeasable On 05/24/2012 11:03 PM, Solar Designer wrote: > On Thu, May 24, 2012 at 10:49:41PM +0200, magnum wrote: >> FWIW, some very quick tests on Solar's test gear with the hash above: >> >> CPU (8 cores): 4.75 c/s >> GTX580: 4300 c/s >> HD7970: 6000 c/s >> >> So while the CPU speed is hopeless, using high-end GPU's the speed is >> not that bad. > > These GPU speeds are not realistic. There must be a bug or just lack of > support for non-default numbers of iterations for this hash type (this > is something for us to correct if so!) You are correct. I should have realised that :/ > Also, I guess you were not running Claudio's latest OpenCL code, which > should do 11.5k c/s on GTX 570 at rounds=5000. I thought I did a pull. Will re-check later. If rounds is not supported it really needs to be fixed. magnum
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