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Date: Sat, 5 Oct 2019 13:44:52 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: OpenCl on mesa amd
On 2019-10-04 12:31, Bernd Roehmer wrote:
> I just installed opencl-mesa and ocl-icd on Manjaro and as well as john
> 1.9.0.jumbo1-2.
>
> I tried to test rar password cracking with the built in test but I am
> running into error messages:
We've seen many bugs in the MESA runtime and the RAR-opencl format is
very well tested so I suspect you're seeing bugs in MESA.
> Any ideas what I can do now? Running the test without opencl works
> without a problem.
Are you running latest'n'greatest MESA? While I really hope MESA and
pocl eventually evolve to good stuff, your best bet is probably trying a
proprietary driver. They can be installed side by side BTW.
> I am curious why john opens 12 OpenMP processes, when it is supposed to
> use the gpu. My cpu has 12 cores.
The RAR-opencl format and very few others have some post-processing on
CPU (if all early-reject tests pass) because the actual "unrar" code is
more or less impossible to implement on GPU.
magnum
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