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Date: Tue, 22 May 2012 22:29:52 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: Fwd: bash auto-completion for john
On 05/22/2012 07:39 PM, Frank Dittrich wrote:
> I just realized it might be more important to add support for GPU
> specific options.
>
> (E.g., I saw -pla=1 mentioned in some john-dev threads.)
>
> Can someone post john's usage output for a CUDA/OpenCL build
Ah, yes. For CUDA builds there is -device only. For OpenCL builds, there
are -platform and -device. A GPU build has both CUDA and OpenCL (and
then the -device option will mean CUDA device or OpenCL device depending
on what format you chose). They will show up like this in the usage blob:
CUDA build:
--device=N set CUDA device, default 0
OpenCL build:
--platform=N (or =LIST) set OpenCL platform, default 0
--device=N set OpenCL device, default 0
GPU build:
--platform=N (or =LIST) set OpenCL platform, default 0
--device=N set OpenCL or CUDA device, default 0
> I probably need to install a proprietary driver, and the GF108 isn't the
> fastest nVidia card, but this shouldn't prevent me from using the GPU
> for john, even if only to find out which additional options need to be
> supported by the bash completion script.
The question is mostly about what distribution you use. Latest Ubuntu
versions of "nvidia-current" are OK for anything but GTX6xx as far as I
know. If you are to install the nvidia drivers off their web you may
need to blacklist nouveau first.
> (Do we even need additional --list= values, to list the available GPUs...)
--device=LIST (or --platform=LIST which is currently exactly the same)
works for OpenCL while CUDA values are in the blind for now. But I think
it's enough to just expand the options, not the arguments. Anyway here's
an example output (CPU only):
$ ../run/john --plat=list
Platform #0 name: Intel(R) OpenCL
Platform version: OpenCL 1.1 LINUX
Device #0 name: Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz
Device vendor: Intel(R) Corporation
Device type: CPU (LE)
Device version: OpenCL 1.1 (Build 15293.6649)
Driver version: 1.1
Global Memory: 3855 MB
Global Memory Cache: 3072 KB
Local Memory: 32 KB (Global)
Max clock (MHz) : 2400
Max Work Group Size: 1024
Parallel compute cores: 2
Platform #1 name: AMD Accelerated Parallel Processing
Platform version: OpenCL 1.1 AMD-APP-SDK-v2.5 (684.213)
Device #0 name: Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz
Device vendor: GenuineIntel
Device type: CPU (LE)
Device version: OpenCL 1.1 AMD-APP-SDK-v2.5 (684.213)
Driver version: 2.0
Global Memory: 3855 MB
Global Memory Cache: 32 KB
Local Memory: 32 KB (Global)
Max clock (MHz) : 800
Max Work Group Size: 1024
Parallel compute cores: 2
I suppose you could grep for /^Platform #([0-9]+)/ and /^\tDevice
#([0-9]+)/ if you like.
magnum
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