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Date: Fri, 31 Oct 2014 17:26:14 +0530
From: Sayantan Datta <std2048@...il.com>
To: john-dev <john-dev@...ts.openwall.com>
Subject: Re: descrypt speed

On Fri, Oct 31, 2014 at 11:03 AM, magnum <john.magnum@...hmail.com> wrote:

> Your numbers are not particularly bad afaik. I'm concerned about "fork"
> being beneficial at all, for anyone. For a semi-slow format like this I
> think a 50% speedup from using fork means we should be able to improve
> something.


The bottleneck with descrypt-opencl are two fold. First is the candidate
generation. Second is hiding latency of transferring candidates to GPU and
back. The second bottleneck can be scrutinized by looking at the GPU usage
percentage.

Regards,
Sayantan

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