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Date: Tue, 19 Jun 2012 04:25:21 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: bf-opencl

Sayantan -

On Fri, Jun 15, 2012 at 09:16:45AM +0530, SAYANTAN DATTA wrote:
> The above problem is now fixed.

Thank you!  Your code works fine for me now.  I briefly tried tuning the
parameters, but couldn't get it to run faster than ~4150 c/s.  So I
cheated:

XAUTHORITY=~user/.Xauthority DISPLAY=:0 aticonfig --od-enable --od-setclocks=1250,1375

This brought the speed to:

Benchmarking: OpenBSD Blowfish OpenCL [BF_OPENCL]... DONE
Raw:    5556 c/s real, 238933 c/s virtual

which is about the same as the CPU - meaning we can double the speed by
using both the CPU and the GPU at once (two instances of John).

The card stays cool (71 C) since we're under-utilizing the GPU anyway.
...Oh, I got "ASIC hang" after:

guesses: 345  time: 0:00:03:28 0.00%  c/s: 5449  trying: 123456 - random

Whatever.  I'll bring it back to stock clocks (925 MHz core).

BTW, 1300 MHz resulted in John's self-test failure, and 1250 MHz worked
for 3.5 minutes as you can see.  I don't know if the "ASIC hang" was
related to the overclock or not.

Alexander

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