Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Fri, 29 Jun 2012 11:20:50 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: 1.7.9-jumbo-6

On Fri, Jun 29, 2012 at 12:44:33PM +0530, SAYANTAN DATTA wrote:
> On Fri, Jun 29, 2012 at 12:35 PM, Solar Designer <solar@...nwall.com> wrote:
> 
> > pre-configured for AMD Radeon HD 7970, will likely fail on others unless
> >  WORK_GROUP_SIZE is adjusted in opencl_bf_std.h and opencl/bf_kernel.cl
> 
> Yes it is okay. Also add this simple expression to calculate
> WORK_GROUP_SIZE = (usable LDS size per WORK_GROUP in KB)/4.
> eg.Usable LDS_SIZE per Work Group is 32KB for 7970 although actual LDS size
> is 64 KB.

That's too much detail for what I am writing.  The text is too long as
it is.

> Or if you want I could prepare a chart for WORK_GROUP_SIZE for different
> devices.

You may create this wiki page:

http://openwall.info/wiki/john/GPU/bcrypt

If you do this right now, I might refer to it.

Thanks,

Alexander

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