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Message-ID: <20150819172703.GA17294@openwall.com> Date: Wed, 19 Aug 2015 20:27:03 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: PHC: Argon2 on GPU On Wed, Aug 19, 2015 at 07:12:55PM +0200, Agnieszka Bielec wrote: > it's slower with wrap instead of % > I just changed x % y to number 5 and I gained speed only on my 960m > from 1861 to 1878 (argon2i). I will check again % after another > optimizations I expected this to make more of a difference, but that's OK. As usual, reviewing the generated GPU ISA code would be helpful to figure out what's going on. BTW, with "changed x % y to number 5" you probably had it process uninitialized data until 5 blocks were written. Alexander
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