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Date: Thu, 3 Sep 2020 23:47:50 +0200
From: Axymeus <>
Subject: rar-opencl performance

However while john is now running, I'm not entirely convinced it's
making any use of the GPU. I'm not seeing any GPU utilization from
john (really 0%), and performance is only slightly better than running
with the CPU (~800 p/s versus 250 p/s, using an i7-8700, a quick test
with cRARk tells me my GPU should be able to reach ~18,000 p/s. Of
course we're looking at different softwares but still). John also uses
the same number of OpenMP threads (12) on both runs

On Thu, Sep 3, 2020 at 11:38 PM Axymeus <> wrote:
> Terribly sorry, I had never used a mailing list before.
> For future reference I was running the command line "john.exe
> --format=rar-opencl hash.txt" from a PowerShell prompt, using run as
> my working directory. I did as Claudio suggested and ran from
> run\kernels, and now it works. Even with the default cygOpenCL-1.dll
> for that matter. Thank you all for your help.

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