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Date: Thu, 20 Aug 2015 22:40:16 +0200
From: Agnieszka Bielec <>
Subject: Re: PHC: Argon2 on GPU

2015-08-20 22:34 GMT+02:00 Solar Designer <>:
> On Thu, Aug 20, 2015 at 08:04:20PM +0200, Agnieszka Bielec wrote:
>> 2015-08-19 18:39 GMT+02:00 Solar Designer <>:
>> > I think you may try working on ulong16 or ulong8 instead.  I expect
>> > ulong8 to match the current GPU hardware best, but OTOH ulong16 makes
>> > more parallelism apparent to the OpenCL compiler and allocates it to one
>> > work-item.  So please try both and see which works best.
>> I created something using ulong8, it's almost not noticeable better
>> speed in my laptop but worse on super both cards, no idea if this is
>> what you wanted ( I think that not ), you can take a look on branch
>> vector8

> You should also
> use the wider vector type for the global memory references and in the
> kernel parameter list.

was even more slower (on super, both cards)

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