[gmx-developers] GROMACS OpenCL on Gallium

Vedran Miletić rivanvx at gmail.com
Wed Oct 21 13:35:09 CEST 2015

2015-10-21 12:40 GMT+02:00 Alexey Shvetsov <alexxy at omrb.pnpi.spb.ru>:
> В письме от Wednesday 21 October 2015 12:24:42 пользователь Vedran Miletić
> написал:
>> 2015-10-20 21:25 GMT+02:00 Alexey Shvetsov <alexxy at omrb.pnpi.spb.ru>:
>> > Hi!
>> >
>> > I tryed to run GROMACS on Mesa/OpenCL. Problem is that Radeon cards older
>> > then See Island/Southern Island doesnt support global atomics. But on
>> > this cards GROMACS should work (however i didnt tested it, since i dont
>> > have such cards {r9 285x or r9 38x })
>> Did GROMACS actually run for you? Did you have to modify the code
>> somehow? What version of Mesa and libclc did you use?
> I use git master for mesa libclc and llvm, however i cannot make it work since
> mesa doesnt support global atomics on my GPU.I asked one of AMD dev who
> involved in mesa opencl development about cards that support global atomics in
> mesa and he recomended me something like R9 285 and higher (Sea Island/
> Southern Island series)
> Only modification I made for gromacs code was whitelisting mesa opencl.

I see. I discussed this with people at #dri-devel on Freenode, they
also mentioned missing image support.

I will grab a Radeon R7 360 and give it another shot. I'm really
curious whether we can get it to work and what performance will we


Vedran Miletić

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