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Date: Fri, 14 Aug 2015 21:44:10 +0300
From: Solar Designer <>
Subject: Re: PHC: Argon2 on GPU

Agnieszka, magnum -

On Fri, Aug 14, 2015 at 08:40:28PM +0200, Agnieszka Bielec wrote:
> I'm not sure if you fully understand this post
> on super, john computes gws, 1024 is the best, it prints:
> Local worksize (LWS) 64, global worksize (GWS) 1024
> but actually 256 is set and these coputations are for GWS=256, if you
> specify GWS=1024 speed is better and really for GWS=1024
> for argon2d is similar problem but it's not so bad : GWS isn't equal
> to 256 but it's between 512 and 1024
> this shows that there is a bug in auto tune or in my configuration (
> but if there is a bug in my configuration there is also in auto tune,
> even if I configured something wrong john shouldn't show that GWS=1024
> when GWS=256)
> but I don't have this problem on my laptop (another or it's just only
> that first call of crypt_all() is just slower)

OK, you and magnum need to figure this out and fix whatever bug there is.


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