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Message-ID: <20121110002327.GB6542@openwall.com>
Date: Sat, 10 Nov 2012 04:23:27 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Split kernel for OpenCL WPA-PSK
magnum -
On Fri, Nov 09, 2012 at 08:00:50PM +0100, magnum wrote:
> how about upgrading Bull to the driver versions recommended by HashCat?
> It's Catalyst 12.8 and nvidia 304.32.
I was/am going to install whatever is latest, but not right now as I
have no time to deal with possible side-effects or perform a downgrade
in the following couple of weeks. So let's revisit this in 2+ weeks
from now.
> Using device 0: Tahiti
> Local worksize (LWS) 128, Global worksize (GWS) 262144
> Benchmarking: WPA-PSK PBKDF2-HMAC-SHA-1 [OpenCL]... DONE
> Raw: 129453 c/s real, 52428K c/s virtual
Great!
> This is a tad faster than HashCat unless Atom has tweaked it since the
> figure I found (otherwise he will now... OTOH I'm not done yet =).
The hashcat website says 131k c/s, and it did for a while (not a recent
change). Milen mentioned getting 137k with hashkill in a tweet a while
ago. All of these are for HD 7970 at stock clocks.
> Jumbo-7 does 42723 c/s out of the box.
IIRC, it did 55k when built with OpenMP. Still relatively slow, of course.
> If I only could figure out how to compile clcc on Bull. I have no chance
> to look at the referenced Ptx assembly. Or is there a way to keep temp
> files?
I hope someone else will answer this better, but we can try chattr +a on
a directory (needs root privs) or LD_PRELOAD'ing a library with dummy
unlink() (can be done as non-root) if nothing else helps.
Alexander
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