Date: Fri, 14 Aug 2015 18:17:35 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: PHC: Argon2 on GPU On Fri, Aug 14, 2015 at 04:37:06PM +0200, Agnieszka Bielec wrote: > cracking mode on my laptop on argon2d showed that at the beginning > speed is the same to this showed during computing gws, after some time > I am getting speed closest to showed during --test but it's not > exactly the same. Please use either only wordlist mode, or incremental mode locked to a fixed length for such tests. When you run with no cracking mode specified, this eventually proceeds to incremental mode (pass 3/3) with length switching, and that length switching is rather slow initially (so may significantly reduce the speeds during the first few minutes). Anyway, I think your runs are long enough to mostly compensate for this effect. > Speed for cost 1 (t) of 1, cost 2 (m) of 1500, cost 3 (l) of 1 > Many salts: 4114 c/s real, 4077 c/s virtual > Only one salt: 4114 c/s real, 4114 c/s virtual > > I don't have big differences with argon2i on my laptop > > on super: [...] > Speed for cost 1 (t) of 3, cost 2 (m) of 1500, cost 3 (l) of 1 > Many salts: 390 c/s real, 102400 c/s virtual > Only one salt: 390 c/s real, 102400 c/s virtual Is super like 10x slower than your laptop at this now? Why is that? > so speeds reported by main --test are good Yes, it seems so, but your benchmarks above also show a GPU on super performing much slower than in your laptop, and this makes no sense. Alexander
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