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Date: Wed, 30 May 2012 00:24:36 +0400
From: Solar Designer <>
Subject: Re: Sayantan: Weekly Report #6

On Tue, May 29, 2012 at 11:32:42PM +0530, SAYANTAN DATTA wrote:
> Accomplishments:
> 1. blowfish-opencl now runs on 7970
> 2. improved performance for blowfish-opencl
>    (1050c/s on 4890, 1510c/s on GTX570,2450 c/s on 7970)

Wow.  That's almost one half the CPU speed now.  This is starting to
make sense.

> Priorites:
> 1.Try new optimizations for blowfish-opencl.
> 2. Open for suggestions:)

Are you analyzing the generated code for blowfish-opencl?

What memory type(s) does it use for S-boxes?

How many instances of bcrypt are you computing in parallel on 7970?
If more than 512, then what happens if you reduce it to 512 (the maximum
that may fit in Local Data Share) or lower?  (Yes, this means that we'd
be using at most 25% of the processing capacity, yet it might be the best



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