Date: Fri, 2 Jun 2017 16:50:31 +0200 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: CL_OUT_OF_RESOURCES error with --format=dmg-opencl On 2017-05-11 00:23, magnum wrote: > On 2017-05-11 00:11, B B wrote: >> On May 10, 2017, at 1:32 PM, magnum <john.magnum@...hmail.com >> <mailto:john.magnum@...hmail.com>> wrote: >>> A part of the problem is likely that your hash has a lot higher >>> number of iterations than what is auto-tuned for and you get bitten >>> by the kernel duration watchdog. We should definitely auto-tune for >>> actual loaded hashes, not test vectors - but that's not implemented >>> yet for this format. >> >>> (...) >> >> Success! >> >> I tried GWS=1024, then went to 4096. At 4096 my p/s increased 5 fold >> up to 715p/s from 128p/s. >> >> Thats very impressive >> >> For the heck of it, since we were declaring only GWS instead of LWS >> and GWS, I tried GWS=8192 and replicated the error. I suppose I could >> pump it up a little more or try half again but will probably leave it >> at 4096 and watch for your eventual updates in GitHub for this >> particular issue. My latest ETA has moved from late June to 9 days out. >> My desktop IS very slow now. So I may incrementally lower the single >> kernel invocation as stated in the README, however the performance >> increase is quite nice, thank you. >> >> 10 years of data might be worth a second video card ;) >> >> Thanks magnum > Cool, I'm glad it was that easy. Watch > https://github.com/magnumripper/JohnTheRipper/issues/2538 for updates. You might want to try latest commit. The DMG OpenCL format now use a split kernel and auto-tunes for max. 200 ms per call. It should maximize your speed (although response might be sluggish) without giving any LWS/GWS manually. Oh, and please back up your restore files before trying... just in case we have some ugly bug in there. magnum
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