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Message-ID: <8ebef412fb6a181bc12cd4dfa7a4450c@smtp.hushmail.com>
Date: Wed, 17 Sep 2014 20:41:25 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: nVidia Maxwell support (especially descrypt)?
On 2014-09-17 09:38, Royce Williams wrote:
> In an interesting side note, for some reason, some device specs are
> mismatched in the --list output. I double-checked against temperature
> and fan speed and they're definitely swapped. The 750s are known for
> running much cooler than older nvidias, for example.
>
> $ ./john --list=opencl-devices
> Platform #0 name: NVIDIA CUDA
> Platform version: OpenCL 1.1 CUDA 6.5.14
> Device #0 (0) name: GeForce GTX 750 Ti
...
> Fan speed: 66%
> Temperature: 88°C
...
> ... whereas nvidia-smi shows the expected fan and temps:
>
> $ nvidia-smi
> Tue Sep 16 23:35:06 2014
> +------------------------------------------------------+
> | NVIDIA-SMI 340.32 Driver Version: 340.32 |
> |-------------------------------+----------------------+----------------------+
> | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
> | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
> |===============================+======================+======================|
> | 0 GeForce GTX 480 Off | 0000:01:00.0 N/A | N/A |
> | 67% 90C P0 N/A / N/A | 470MiB / 1535MiB | N/A Default |
> +-------------------------------+----------------------+----------------------+
> | 1 GeForce GTX 750 Ti Off | 0000:02:00.0 N/A | N/A |
> | 32% 48C P0 N/A / N/A | 307MiB / 2047MiB | N/A Default |
> +-------------------------------+----------------------+----------------------+
Thanks for reporting. I knew we could have this problem with AMD
devices. The root problem is that there is no reliable mapping between
OpenCL device numbers and NVML/ADL device numbers. Hashcat has the same
problem at times, even though it tries harder (using heuristics) than we
currently do. It's a pity we can't read the sensors using OpenCL.
This only ever affects temp, fan and utilization (whan applicable)
though. All other figures from --list=opencl-devices should be correctly
mapped.
magnum
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