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Date: Thu, 23 Feb 2012 22:12:53 +0100
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: intel OpenCL (for CPU) "review"
On 02/23/2012 09:54 PM, magnum wrote:
> Performance is actually better than our (thin dynamic) SSE2 version.
> I'm not sure how optimised the latter is. Anyway this was on my three
> years old Core2 Duo laptop. I really did not expect that.
>
> Benchmarking: PHPASS-OPENCL [PORTABLE-MD5]... DONE
> Raw: 17388 c/s real, 8735 c/s virtual
>
> Benchmarking: PHPass MD5 [SSE2i 2x4x3]... DONE
> Raw: 15936 c/s real, 15778 c/s virtual
I just realized it's not really better - because OpenCL runs on both
cores (which is half the point of using it) while this SSE2 version only
use one. I could probably whip up a thick OMP phpass version that
exceeds 30000 c/s on this machine. But yet, it's pretty cool.
magnum
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