Date: Fri, 23 Mar 2012 11:03:40 -0300 From: Claudio André <claudioandre.br@...il.com> To: john-dev@...ts.openwall.com Subject: Re: OpenCL formats write-buffer optimisations Hi, I did it for SHA-512. If you guys have a deadline, i prefer to submit latter. Please, let me know. BTW, the self-test stuff is going to be useful to me too. Claudio Em 22-03-2012 18:45, magnum escreveu: > Samuele, > > Could you take a look at commit 7c8dcdb and see if you agree with it? > I'm not sure there's much of a boost but there is no downside. This > general approach should be considered for all formats. Never do anything > not needed :) > > The opposite case, many salts, could be optimised too. In this case, > john will do this: > > set_salt() > set_key() (millions of times) > crypt_all() > set_salt() > crypt_all() (using same keys) > set_salt() > ... > > In this case we should avoid re-transferring the keys as they are > already there. This might be a noticable boost on systems with slow > transfer as the key buffer is a lot larger. One way to achive this is > something like the enclosed patch (untested on GPU as of yet). All > salted formats could/should do something like this. > > magnum
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