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Date: Sun, 3 Nov 2013 14:06:27 +0100
From: Katja Malvoni <kmalvoni@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: ZedBoard: bcrypt

Hi Alexander,

On Wed, Oct 30, 2013 at 10:17 AM, Solar Designer <solar@...nwall.com> wrote:

> If so, does anything prevent you from optimizing this to? -
>
> Cycle 0: compute new R; swap L and R; initiate 4 S-box lookups
> Cycle 1: wait
>

I implemented this - performance on self test for one core is 79 c/s while
for 14 cores it's 765 c/s. For cost 12 these numbers are 0.6656c/s for 1
core and 8.002c/s for 14 cores. Overhead of loading data from shared BRAM
into per core BRAMs is significant.
Maximum frequency is now 93.765 MHz although design seems to be working
properly with 100 MHz clock.

Katja

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