Date: Sun, 2 Nov 2014 12:53:30 +0100 From: Johannes Dieterich <dieterich.joh@gmail.com> To: =?UTF-8?B?SmVhbi1Tw6liYXN0aWVuIFDDqWRyb24=?= <dumbbell@freebsd.org> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: NVidia Tesla K40 Message-ID: <CABquGzV8e4NnOZrjDDuj-E83%2BxH24YNyOpbTwY7gb4b3wXNDkQ@mail.gmail.com> In-Reply-To: <5456069F.702@FreeBSD.org> References: <2074770725.140543.1414773975682.JavaMail.yahoo@jws10681.mail.bf1.yahoo.com> <5456069F.702@FreeBSD.org>
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Dear Jean-Sebastien, just to chime in on one aspect I care about: On Sun, Nov 2, 2014 at 11:25 AM, Jean-S=C3=A9bastien P=C3=A9dron <dumbbell@= freebsd.org > wrote: > On 31.10.2014 17:46, John Dison wrote: > > Hello! > > Hi! > > > I want to use NVidia Tesla K40 GPU for parallel computing.Does > > FreeBSD support such a hardware? > > As O. Hartmann explained, we don't support GPGPU on NVIDIA hardware, > neither with the binary driver because NVIDIA doesn't provide any > libOpenCL.so for FreeBSD, nor with the FOSS driver because we don't have > the kernel video driver. > > On the AMD front, GPGPU works with the open-source stack (libclc and > Clover, Mesa's libOpenCL.so), but the Clover port isn't committed yet. > We didn't have the time to polish it so far (only libclc is available in > devel/libclc). > > Note that Clover is still a WIP. Here's a matrix of implemented and > missing features: > http://dri.freedesktop.org/wiki/GalliumCompute/ > > When I tried it with simple programs found on the Net, it worked. > However, I couldn't use it with graphics/darktable: > 1) Currently, the amount of memory reported by Clover is hard-coded > 2) darktable expects features not implemented > IMHO, a very good and relevant test is clBLAS ( https://github.com/clMathLibraries/clBLAS ). Anything HPC will require these functions to work properly and (albeit computationally demanding) they are well controllable for benchmarks (in terms of setup and memory dimensioning). Coming from a HPC background, the next step would be something like MAGMA ( http://icl.cs.utk.edu/magma/software/index.html ) which uses clBLAS and adds some LAPACK-style functionality to it. Again, well controllable and computationally challenging. I am happy to act as tester, btw. Looking forward to this landing in BSD, thanks so much for your and all of the graphics teams work! Johannes
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