Mesa Clover OpenCL [deprecated]

Zucca · Last edited by Zucca on Sun Nov 05, 2023 11:13 am; edited 1 time in total

I'm trying to set up a OpenCL capable system. Well at least OpenCL 1.1 capable. ;)
This is just my own interest on testing this on open source AMD drivers.

I'm testing the OpenCL using bfgminer. bfgminer only acts as a test program to show me if I really have gotten things right. Unfortunately not.
bfgminer does not find my GPU, which is R9 Nano.

I've applied opencl USE-flags globally. Then rebuild @world with --newuse. I then used eselect opencl to set mesa as my OpenCL implementation.

I don't know what else to tell... I have no error logs or messages to paste. There just isn't any OpenCL platforms/devices on my system according to bfgminer and even to blender.
Any help?
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Zucca · Posted: Mon Oct 10, 2016 11:07 am Post subject:

Just a little update here.

I managed to get bfgminer to use OpenCL platform. I'm not sure how, but I at least got virtual/opencl from gentoo-gpu overlay.
However the mining speed is slow. The cause of that might reside in my gpu driver settings or in gpu bios.
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Zucca · Posted: Sun Oct 30, 2016 8:40 pm Post subject:

It seems that enabling opencl and using Mesa Clover may cause Blender to Freeze. Even if Mesa Clover isn't selectable in Blender it's still somehow messing it up.
Also while bfgminer can utilize my GPU, Boinc is still unable to do so. I get tasks assigned to my GPU. The progress shows "100%" all the time and the GPU utilization is practically zero (looking at radeontop). This, however, should be possible with Mesa Clover. At least people have managed to get it working propely. I tried Einstein@home project which is the same as with one individual who got it working.

So. More investigation is needed.
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Zucca · Posted: Sun May 14, 2017 9:05 am Post subject:

If someone is following this topic still... (based on views, it seems that people are actually reading this)

So. Clover seems like a dead project. But there's still ways to get OpenCL working on AMDGPU. One way is using OpenCL libraries from AMDGPU-PRO.

I've started to collect information and will eventually write an unoffical topic if I get things working. Spoiler: ROCm has been open-sourced. ;)
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Ant P. · Watchman Joined: 18 Apr 2009 Posts: 6920

AFAIK clover was merged into mesa and lives there now. OpenCL "works", but is nearly useless because it still only supports the CL1.1 spec while most things are written for 1.2 or higher (or vulkan).

Zucca · Posted: Sun May 14, 2017 6:11 pm Post subject:

And even CL1.1 is marked as WIP.

I'm going to try out pulling the libraries required for OpenCL from AMDGPU-PRO. Some have reported that to be a working solution. It is in no way offical way from any perspective, but worth trying out.
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szatox · Advocate Joined: 27 Aug 2013 Posts: 3447

I once had a working bitcoin miner running on radeon.
AFAIR all it took was enabling opencl flag and then pointing the miner to the correct cl kernel. It came with like 10 kernels and was unable to autodetect the correct one, so I had to specify it manually, and this part came unexpected which also made it confusing.

So... I am totally sure opencl used to work, though I gave up on mining after like a week. GPU can't compete with ASICs. My electricity bill would top any possible gain. (It was still 10 times faster than all CPU cores working together)

Zucca · Posted: Thu Jul 06, 2017 11:55 am Post subject:

Looks like dev-libs/amdgpu-pro-opencl has appeared on portage (default gentoo overlay).
Darktable seems to utilize the OpenCL cababilities, although I needed to tell where to find the library.
Looks very promising, as I can still keep open source AMDGPU drivers, but use only OpenCL libraries from amdgpu-pro. ;)

EDIT: There's no download link on AMD's website for the specific driver package which amdgpu-pro-opencl (ebuild) needs (although I guess it only need to be one for Ubuntu 17.10). However I forced the exact download using this command:

Zucca · Posted: Thu Jul 06, 2017 6:23 pm Post subject:

I tried to benchmark performance using ethminer. All I got was frozen X. amdgpu apparently died (horribly).

skunk · Posted: Mon Feb 12, 2018 6:30 pm Post subject:

hey!

did you manage to run any miner at a reasonable speed?
i've tried both dev-libs/amdgpu-pro-opencl and x11-drivers/amdgpu-pro (following this howto), however with the former no opencl devices are found, while with the latter the miner complains it cannot initialize...

thank you

Zucca · Posted: Thu Mar 01, 2018 7:50 pm Post subject:

skunk · Posted: Thu Mar 01, 2018 8:23 pm Post subject:

Zucca · Posted: Thu Mar 01, 2018 9:15 pm Post subject:

skunk · Posted: Thu Mar 01, 2018 9:26 pm Post subject:

s_j_newbury · n00b Joined: 05 Apr 2007 Posts: 56 Location: UK

I'm the maintainer of the gentoo-gpu overlay, I've been neglecting it quite badly but I have quite a few local changes to push, which I will do shortly if testing is successful.

I've recently acquired an RX470 so I can finally test Clover on actual hardware and fix a few issues. I've also taken to maintaining the old nvidia-drivers until such a time that Nouveau/Clover supports Fermi hardware (as on my laptop).

Right now I can confirm as working:

Mesa-git/LLVM-git/AMD: Works at least on POLARIS10, actually faster than amdgpu-pro for pyrit!

Beignet is working for me with IvyBridge again after a little hacking....

NVidia CUDA/OpenCL works at least for me.

I'm considering completely dropping CUDA support since it is dependent on really old gcc releases and maintaining just the GL and CL components.

Edited to add: All the above is working with ocl-icd so can operate simultaneously where supported.

Zucca · Posted: Mon Oct 22, 2018 3:53 pm Post subject:

I wonder if mesa clover will user ROCm (or Vulkan*) under the hood eventually...

* Some time ago I read that Vulkan could/would evetually replace OpenCL. So combining OpenGL and OpenCL basically...
Is there any truth to this?
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Marlo · Veteran Joined: 26 Jul 2003 Posts: 1591

s_j_newbury · n00b Joined: 05 Apr 2007 Posts: 56 Location: UK

s_j_newbury · n00b Joined: 05 Apr 2007 Posts: 56 Location: UK

I was a little surprised Clover from git Mesa/LLVM is faster than amdgpu-pro at the "pyrit benchmark". It's a shame it's only OpenCL 1.1.

Marlo · Veteran Joined: 26 Jul 2003 Posts: 1591

I had seen your gentoo-gpu overlay. Unfortunately it is not for AMD at the moment.
So I installed "ROCm on Gentoo" and "radeon-profile".
How did you do the "pyrite benchmark"?

Marlo · Veteran Joined: 26 Jul 2003 Posts: 1591

s_j_newbury · n00b Joined: 05 Apr 2007 Posts: 56 Location: UK

eccerr0r · Posted: Sat Nov 04, 2023 5:34 pm Post subject:

Ugh....for those searching for clover/mesa it was indeed deprecated and right now, they're trying to go to rusticl/mesa getting opencl-3 ... except R600 cards are still broken it seems :(
New thread should ensue but posting here as it looks like this is no longer applicable to mesa 23... :(
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Zucca · Posted: Sun Nov 05, 2023 11:20 am Post subject: