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Date: Thu, 17 May 2012 09:45:43 +0530
From: SAYANTAN DATTA <std2048@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Sayantan: Weekly Report #4

On Thu, May 17, 2012 at 6:06 AM, Solar Designer <solar@...nwall.com> wrote:

> In Accomplishments above, you don't mention any of your work on using
> multiple GPUs at once - although I think you did some work on this.
> Does this mean that you did not actually "accomplish" anything in that
> respect?  It'd be helpful if you let us know what you tried and what you
> observed, even if the goal was not achieved.
>

Yes I have implemented simultaneous multiple gpu cracking in
common_opencl_pbkdf2. However I haven't posted a patch yet. Here's one
sample run using 570 and 7970.

OpenCL platform 0: NVIDIA CUDA, 1 device(s).
Using device 0: GeForce GTX 570
Optimal Work Group Size:512
Kernel Execution Speed (Higher is better):0.414070
OpenCL platform 1: AMD Accelerated Parallel Processing, 2 device(s).
Using device 0: Tahiti
Optimal Work Group Size:256
Kernel Execution Speed (Higher is better):1.399552
Benchmarking: MSCASH2-OPENCL [PBKDF2_HMAC_SHA1]... (8xOMP) DONE
Raw:    116250 c/s real, 1344K c/s virtual

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