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Date: Tue, 21 Jan 2014 19:39:13 +0100
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: Re: CUDA formats

On 2014-01-21 18:36, Muhammad Junaid Muzammil wrote:
> In terms of performance, I personally think that both are equally well.
> What gives CUDA edge is its libraries. There are a lot more scientific
> computing being done in CUDA as compared to OpenCL (at least what I have
> observed). One such example is that over gpgpu.org, CUDA resources are
> atleast three times than that of OpenCL (322:101) in actual.

Let's se what it looks like in a couple of years from now. I really like 
nvidia, they have stable drivers and much less problems with everything. 
It's just the little problem that they suck at password cracking and 
that's not really about CUDA vs OpenCL but hardware differences. However 
iirc when it comes to 64-bit formats, nvidia may look better - or at 
least less bad.

> Regarding the Nvidia vs AMD comparison, 2 of the world's most powerful
> supercomputers consists of Nvidia devices where as there isn't any AMD
> machine in it (http://www.top500.org/lists/2013/11/). With Nvidia investing
> a lot in academia with its CUDA programs, atleast I don't see an end to it.
> But who knows, may be my predictions prove wrong.

@epixoip mentioned on hc forums that Seoul National University have a 
cluster on some top 500 list, consisting of 224 x AMD 7970 devices 
running SnuCL. I can't find it in the list you link to, so maybe it was 
some other top 500.

> I, personally would say to keep the CUDA support open. The priority for its
> development can be set as low but don't tune it off.

Yeah don't worry - JtR is used a lot for academic research anyway and 
someone may need it. I do welcome improvements.

BTW apart from wpapsk, CUDA md5crypt also lags behind the OpenCL 
version. Feel free to fix that. Either have a look at latest 
md5crypt-opencl in bleeding-jumbo, or do it on your own and make it even 
better.

magnum


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