Trying to wrap my head around GPU considerations

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Hmm. Debian 13 does not have intel-opencl available in the repo. Or, at least, not on the stable branch. I guess I will have to do more homework.

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I’m not on Debian, but maybe this page will help - ?

Intel Compute Runtime packages, Debian

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Yes, the package on Debian is intel-compute-runtime

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That is all in the unstable branch of Debian (Sid).

I know there are a handful of people who use MX linux here at pixls. Anyone running an Intel GPU (A or B series) and has openCL working?

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UPDATE*

I am posting this just in case someone finds this in the future and wonders what happened.

I lost openCL support on my Intel iGPU when I upgraded to MX-Linux 25, as it is based on Debian 13. This was no problem, as my cpu was much faster than using the iGPU anyway. Debian, as of the time of this post, is not offering the intel-compute-runtime in stable or testing branches (where MX-linux pulls from). Nor were the mesa drivers able to get openCL working on my intel iGPU. According to Debian, there was no support for NVIDIA 5xxx cards available yet either.

Since Debian builds on the default kernel (6.13…iirc), but i use the Liqourix linux_6.18 kernel from the MX-Linux AHS version, I decided to try manually installing the most recent intel-compute-runtime per Intel’s directions. You can find that on github. I renamed the rusticl.icd in my /etc/OpenCL/vendors/ folder. Without the rename ‘clinfo’ would report a seg fault. With all that done, ‘clinfo’ had no issues and reported my intel iGPU as an available device. Darktable also had no issue seeing it, and I could enable openCL without problems.

Today, I purchased myself an Arc B570 and had zero issues. Everything recognized and working straight after plugging it in. The difference is staggering from running only on cpu. I have not had a go at any fine tuning for increased performance.

With regards to memory and concerns over tiling:
I have only had a quick play with photos from my library. I use a Sony a6500 and a6000, so my files are in the 24mb range. I have not seen any notices regarding tiling in the logs when starting dt with the ‘-d opencl -d perf’ options.

I will go back though the play_raw section of pixls and try to figure out where 10GB of vram becomes insufficient. I will add any further info below.

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Yes, this is why we recommend a discrete GPU. Even some older cards will make a huge difference from CPU only.

10GB vram is plenty for 24 mpix. Even if you went to 45mpix you’d be fine

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