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Date: Thu, 22 Aug 2013 22:06:39 +0100
From: Rafael Waldo Delgado Doblas <lord.rafa@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Parallella: Litecoin mining
Hello,
2013/8/22 Solar Designer <solar@...nwall.com>
> Your epiphany-scrypt.c currently contains the entire scrypt (albeit
> specialized to the parameter values needed for Litecoin mining).
>
> This means that it contains not only Salsa20/8, BlockMix, and SMix, but
> also SHA-256 and PBKDF2. Given that in scrypt almost all processing
> time is spent in SMix, we should move SHA-256 and PBKDF2 to host. Leave
> only SMix on Epiphany. This will free up some local memory, which
> should enable us to decrease the TMTO factor.
>
> Ideally, the two PBKDF2 computations (before and after SMix) that we'll
> perform on host should overlap with SMix computation on Epiphany.
>
Ok I will work on it now.
Regards,
Rafael.
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