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lars_the_bear
Guru
Joined: 05 Jun 2024
Posts: 468
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 Posted: Fri Sep 27, 2024 2:51 pm Post subject: AMD RX 460 GPU and OpenCL |
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Hi folks
I'm tearing my hair out here...
I have an old-ish Lenovo P710 workstation. I want OpenCL to work on it, so that Darktable will be faster. I don't really know what OpenCL is, but I know that it makes Darktable faster, because I have it on other machines. The P710 came with an ancient NVidia GPU which I was told in another thread would never support OpenCL.
I don't have a lot of money, so I bought a slightly more modern AMD RX 460, which seems to be generally well-supported by Linux. I rebuilt everything with
VIDEO_CARDS="amdgpu radeonsi
and, in general, it works fine. But I'm struggling to get OpenCL to work. I'm using the amdgpu driver and, according to the Gentoo documentation[1],
"OpenCL 2.0 is available via ROCm (dev-libs/rocm-opencl-runtime)"
So I installed this library and its stack of dependencies. But even 'clinfo' crashes:
| Code: | $ clinfo
free(): invalid pointer
Aborted
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Looking at the various bits of Gentoo documentation, there seems to be a dozen different ways to get OpenCL support with AMD GPUs. There are closed-source and open-source GPU drivers. There are closed-source and open-source OpenCL implementations for AMD. There are completely (it seems to me) unrelated ways to get OpenCL using Mesa (and I have no clue what Mesa is).
I just want to know the way that works. It doesn't have to be the fastest or shiniest implementation, I don't need to understand it -- it just needs to not crash.
If anybody has got OpenCL working with this kind of GPU, could you please tell me how? Before I hurt myself beating my face on the desk, ideally.
BR, Lars.
[1] https://wiki.gentoo.org/wiki/AMDGPU |
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grknight
Retired Dev
Joined: 20 Feb 2015
Posts: 1848
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| Posted: Fri Sep 27, 2024 11:52 pm Post subject: |
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Disclaimer: I know very little about OpenCL or other GPU interfaces. This is just what works for me.
On my RX550, clinfo only worked with dev-libs/amdgpu-pro-opencl. It failed, from my POV, with ROCm and the AMD website has a very small list of supported cards for ROCm.
I don't know if the wiki is exaggerated or what.
I am not really using OpenCL so running clinfo is the limit of how I would interact with it. |
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