Re: [Starpu-devel] Peppher: Running StarPU + OpenCL on Cora

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

Alin Dobre, le Tue 18 Dec 2012 12:59:40 +0200, a écrit :
> I am running on a node (node06) which has 3 OpenCL devices (StarPU finds 
> them
> when benchmarking the performance initially).
> 
> I used the libstarpu-1.0.so library that was pre-installed on Cora at the
> location: /opt_new/global/peppher/install/lib
> 
> It seems that when running the application with STARPU_NCPUS=0, StarPU does 
> not
> find any suitable worker to allocate to (starpu_task_submit returns error 
> code:
> -ENODEV).

But do you set STARPU_NCUDA to 0, to let StarPU initialize the GPUs in
OpenCL mode? StarPU can not know in advance whether the application will
provide CUDA implementations or OpenCL implementations, so you need to
tell it explicitly which mode GPUs should be initialized in.

Samuel