On 10/24/11 12:44, Eduardo Morras wrote:
At 12:21 24/10/2011, Ivan Voras wrote:
On 21/10/2011 08:30, Hartmann, O. wrote:
> As I'm not a developer, but for scientific purposes highly
interested in
> using GPUs, the only way of doing HPC computing at the moment is with
> nVidias TESLA/nVidia consumer graphics cards and LINUX, since on Linux
> one willing to use the GPU has the necessary libraries, driver and
> compilers.
Drivers are still a big problem on FreeBSD. AFAIK neither NVIDIA nor ATI
supply GPGPU-enabled drivers for FreeBSD. If this problem were solved, I
think that most of other utilities would mostly "just work" using
standard interfaces like OpenCL.
Nvidia freebsd driver has cuda enabled. But you need the sdk to compiled
c/cuda to lowlevel cuda/asm (don't remember name now) that driver
executes on the gpu. Afaik nvidia freebsd driver hasn't opencl support
but this knowledge comes from "i don't use (tm)" opencl, so i maybe
wrong. The sdk works for Windows, Linux and MacOSX. ATI has retired
ati-stream and ati-tometal languages and support opencl in windows and
linux using a llvm private compiler.
Some days ago, a llvm opencl opensource project started (ati's one is
not opensource)
http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-October/044266.html and
https://launchpad.net/pocl
You need the OpenCL libraries and the nvcc compiler to run OpenCL code.
nVidia doesn't provide any of them natively for FreeBSD.
There is a "hack" for the 32bit Linuxulator capable of executing
OpenCL/CUDA binaries, compiled within a 32bit compatible Linux
environment utilizing the 32bit SDKs provided by nVidia, but the whole
thing looks a bit messy, since I have never got a working solution and
it seems more effort to me to install a complete working Linux environment.
Having an open source solution would be great, but those projects are
quite immature.
I'd like to see some LLVM stuff with the nVidia PTX assembly backend
also usable in FreeBSD, so there may be a chance getting a quite decent
nVidia support and OpenCL working on FreeBSD with that.
AMD is completely out of focus now. Once they promised "free" drivers
but at the moment they seem more closed than nVidia.
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