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Message-ID: <59be4dfa57f40b4cc863eb7689e40af4@smtp.hushmail.com>
Date: Fri, 27 Apr 2012 02:20:31 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: New RAR OpenCL kernel
On 04/27/2012 12:40 AM, Solar Designer wrote:
> On Thu, Apr 26, 2012 at 11:29:43PM +0200, magnum wrote:
>> But with sane durations (like 3 secs @16K GWS) I now have ~4500 c/s on
>> GTX570/580 as well as HD 7970.
>
> That's very nice. There ought to be much room for improvement on the
> 7970, though.
Holy cow. I just replaced an alignment switch statement with a bitflip
macro in sha1_final() - which is only called a mere 17 times in this
256K rounds loop. I just can't believe the result:
Using device 0: Tahiti
Local worksize (LWS) 64, Global worksize (KPC) 65536
Benchmarking: RAR3 (6 characters) [OpenCL]... DONE
Raw: 6725 c/s real, 7245 c/s virtual
...and with fixed length:
Benchmarking: RAR3 (6 characters) [OpenCL]... DONE
Raw: 9033 c/s real, 9899 c/s virtual
That was the least intuitive performance boost I have ever encountered
in my entire life.
magnum
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