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Date: Sat, 17 Nov 2012 16:39:53 +0100
From: Marc Brinkmann <marc.brinkmann@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: scalar mode

Dear Magnum,

sorry, but i'm all new to this.
Like this guy...
http://i2.kym-cdn.com/photos/images/original/000/234/765/b7e.jpg

could you tell me, how apply the patch? I copied the file into the John
folder and tried  $ patch bughunt.diff
But then nothing happend :(
Thanks
BR Marc

2012/11/17 magnum <john.magnum@...hmail.com>

> This drives me mad. Could you check out the latest again, and apply the
> enclosed patch? I actually do the same for OSX in office2007 due to what I
> think is an nvidia bug.
>
>
>
>
> In case this solves the problem, please provide benchmarks from running
> with and without the --request-vectorize option.
>
> magnum
>
>
> On 17 Nov, 2012, at 10:13 , Marc Brinkmann <marc.brinkmann@...il.com>
> wrote:
>
> > I',m sorry, but it did not help in my case :(
> > i tried sabayon with recent catalyst 12.10 and my ubuntu 12.04 with
> > catalyst 12.8 and the very recent 12.11 beta8
> > none of them were working, but 12.11beta even did not work with the
> version
> > <= 13.11.2012
> > I guess its AMD's damn driver and will simply use the old build with
> > catalyst 12.8.
> >
> > Btw. while i tested your recent builds on my Netbook running ION i never
> > had any issues, so Nvidia drivers seem to be much more stable ....
> > Of course it is slow 120c/s.. but i never runs into segfault...
> >
> >
> > 2012/11/16 magnum <john.magnum@...hmail.com>
> >
> >> On 16 Nov, 2012, at 23:10 , magnum <john.magnum@...hmail.com> wrote:
> >>> Try latest commit. The office2007/2010/2013 and ntlmv2 OpenCL formats
> >> will now default to scalar mode on any device, including CPU. You can
> now
> >> add --request-vectorize to your command line and see if vectorizing
> >> triggers the bug, or if it gets faster or slower. Office actually gets a
> >> tad faster on some nvidias, I've never seen that before.
> >>
> >> Correction: It is ntlmv2 that gets faster vectorized on some nvidias.
> And
> >> only the "one salt" case (the opposite would seem more natural to me as
> >> we're memory bound).
> >>
> >> Vectorizing the Office formats are very bad for nvidia but has shown
> some
> >> 40% boost on Cayman.
> >>
> >> CPUs should benefit from vectorizing but I have seen huge regressions in
> >> some cases and great speedups in other cases. Maybe the ideal would be
> to
> >> decide at runtime after a quick benchmark. I'm not feeling very inspired
> >> right now though. Damn drivers :-(
> >>
> >> magnum
> >>
>
>
>

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