[Mesa-dev] Status of Clover (AMDGPU)

[Jan Vesely]

On Wed, 2017-05-31 at 17:44 +0200, Marek Olšák wrote:
> On Wed, May 31, 2017 at 4:37 PM, Luke A. Guest <laguest at archeia.com> wrote:
> > Hi,
> > 
> > I've just reinstalled Gentoo on my machine and I no longer have
> > AMDGPU-Pro on it due to it using ancient libs. My machine is an FX-8350
> > one, so it's PCIe-2.0. Clover is currently lacking in CL compliance at
> > this time.
> > 
> > So, I'm wondering if anyone is actually working on it now that AMD have
> > abandoned it in favour of ROCm? Does anyone know the actual status, i.e.
> > what is and isn't done? I think it's worth getting OpenCL support
> > working for older hw, ROCm has a PCIe-3.0 intrinsics requirement, so for
> > older hardware this isn't an option.
> 
> Nobody has worked on RadeonSI OpenCL for quite some time. Even the
> main developer of R600 and RadeonSI OpenCL (Tom Stellard) was mostly
> working on ROCm when he was at AMD.
> 
> > 
> > So far I've found that gl sharing is missing as are some entry points in
> > dispatch.cpp.
> 
> ROCm OpenCL has interop support with RadeonSI OpenGL. We committed it
> into Mesa when ROCm OpenCL was still closed source. I think it can
> also be used to pass VDPAU surfaces through OpenGL into OpenCL that
> way. It's pretty flexible.
> 
> > 
> > 1) Would it be worth continuting and if so would we be allowed to shared
> > clc files from ROCm to Mesa?
> > 
> > 2) If not, is it worth considering porting Beignet instead, that at
> > least gives OpenCL 2.0.
> 
> Clover and its driver backends are unmaintained and there is no
> production quality Mesa OpenCL driver. If you are interested in
> working on it, feel free, but if you upgrade to a ROCm-capable
> machine, you might lose interest.

This is inaccurate. Francisco maintains Clover state tracker. Vedran
was interested (and doing) some gcn work [0]. afaik, at least Michel
builds and runs clover on GCN hw.
The current status of carrizo + iceland is [1] (I run ROCK kernel on
that machine, which is mostly broken).
The applications that I tested (pyrite, gegl, Imagemagick) mostly work
with only few test case failures.
I agree that it's low on everybody's list, so it'll probably never be
production ready.

Jan


[0] https://bugs.freedesktop.org/show_bug.cgi?id=99553
[1] http://paul.rutgers.edu/~jv356/piglit/gcn-latest-3/problems.html

> 
> Marek
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