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Date: Mon, 17 Jun 2013 06:35:25 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: PBKDF2-SHA512
Lukas -
On Mon, Jun 17, 2013 at 03:56:44AM +0200, Lukas Odzioba wrote:
> I started porting my pbkdf2-sha512 cuda code to opencl.
Sounds good. Thanks!
> It looks like this code running on cpu without touching SSE is 14%
> faster than current cpu version .
>
> john -test -format=PBKDF2-HMAC-SHA512
> Benchmarking: PBKDF2-HMAC-SHA512, GRUB2 / OS X 10.8 [PBKDF2-SHA512
> 128/128 SSE4.1 2x]... DONE
> Raw: 92.6 c/s real, 92.6 c/s virtual
>
> john -test -format=grub
> Benchmarking: grub, grub [PBKDF2-SHA512]... DONE
> Raw: 106 c/s real, 106 c/s virtual
>
> Both tested on the same test vector and cpu.
I think you're comparing one core with C+intrinsics vs. all cores with
OpenCL. Try building with OpenMP enabled for a more relevant comparison.
Alexander
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