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Message-ID: <20130203065731.GA24854@openwall.com>
Date: Sun, 3 Feb 2013 10:57:31 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Avoiding AMD ASIC hangs
On Sat, Feb 02, 2013 at 10:49:38PM -0800, Brian Wallace wrote:
> Solar requested that I implement a split kernel to pwsafe-opencl to avoid
> AMD ASIC hangs. Specifically, it was requested I ask magnum about the
> right way to go about this. I won't be able to implement this right away,
> but I should be able to in the coming week. How should I go about this?
As I wrote in the original thread on pwsafe, before I saw your posting above:
Brian - basically, individual kernel invocations should be taking no
more than 200ms, preferably much less. This means that with a large
GWS, you need to be computing only a fraction of the 2048 iterations per
kernel invocation. Please store intermediate results in global memory.
Some examples:
fgrep HASH_LOOPS opencl_*.c opencl/*
Alexander
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