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Message-ID: <20150826073524.GA4520@openwall.com>
Date: Wed, 26 Aug 2015 10:35:24 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: LWS and GWS auto-tuning
On Tue, Aug 25, 2015 at 08:36:44PM +0200, magnum wrote:
> Ratio: 0.79120 real, 1.11111 virtual sha512crypt-opencl, crypt(3) $6$
I cannot confirm the slowdown for sha512crypt-opencl on Tahiti. To me,
it auto-tunes similarly, and results in similar poor speed.
BTW, it appears to be limited to LWS 256. I think 512 might work
better, like it does on TITAN (where 512 results in lower GWS, too).
But I can't easily find where that limit is. magnum, can you?
Alexander
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