[Mesa-dev] GalliumCompute / OpenCL on Radeon HD7790

[Tom Stellard]

On Mon, Jan 20, 2014 at 11:14:18AM -0800, ian_bruce at fastmail.net wrote:
> On Mon, 20 Jan 2014 08:00:39 -0800
> Tom Stellard <tom at stellard.net> wrote:
> 
> >> http://dri.freedesktop.org/wiki/GalliumCompute/
> 
> >> Could anybody clarify whether the information on the wiki page should
> >> apply to a Radeon HD7790 card? Could the wiki be updated to be more
> >> specific about which GPUs it is relevant to?
> > 
> > Sea Islands GPUs are supported. I've added this to the wiki page.
> 
> Thanks.
> 
> Let me then ask another question: since the new Radeon R9-280X, R9-270X,
> and R7-260X cards are supposed to be based on "Southern/Sea Islands"
> GPUs, would it be safe to assume that they would also be supported?
> 

Yes, they should all be work too, but Southern/Sea Islands OpenCL support
is still in the early stages, so you will have to test it out to see what
works for you.

> http://www.anandtech.com/show/7400/the-radeon-r9-280x-review-feat-asus-xfx
> 
> The "engineering vs marketing names" link on the wiki page should be
> updated:
> 
> http://www.x.org/wiki/RadeonFeature/#index5h2
> 
> And perhaps that table should itself be updated to include the new
> Rx-2yy GPUs, especially if those <= 280 can be considered equivalent to
> the HD7000 series.
> 
> >> Also, could the build instructions comment on whether packages from
> >> the Linux distribution (Debian?) might do as well? Or would those not
> >> have been built with options like
> >> "--enable-experimental-targets=R600", "--with-gallium-drivers=r600",
> >> and "--enable-opencl"?
> > 
> > If you are using Gentoo, then it is possible to enable opencl support
> > when installing the -9999 package of mesa. I'm not sure if any other
> > distros provide packages with OpenCL enabled.
> 
> 
> On Mon, 20 Jan 2014 11:49:40 +0900
> Michel Dänzer <michel at daenzer.net> wrote:
> 
> > The Debian Mesa packages aren't built with --enable-opencl yet, there
> > are Debian bug reports requesting that.
> 
> Is Mesa the only issue? Is it likely that distribution packages for
> LLVM, Clang, and libclc would be sufficient, or would they require
> custom builds as well?
> 

Especially for newer hardware, you would need to custom build the latest
code of these packages for best results.  The packages provided by
distributions are probably too old to do anything useful with OpenCL.

-Tom

> Again, please CC me on any replies.
> 
> 
> -- Ian Bruce