Re: [Starpu-devel] Only 2 OpenCL Devices available

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

Hello,

Please *always* keep the list in Cc.  That not only increases the
chances of getting an answer quickly, but that also increases the
chances of getting a useful answer at all.

"Julian Holzmüller", le Sun 10 Nov 2013 19:39:04 +0100, a écrit :
> StarPU has found :
> 
>    2 CPU cores
>        CPU 0
>        CPU 1
>    0 CUDA devices
>    2 OpenCL devices
>        OpenCL 0 (Intel(R) Core(TM) i7 CPU       Q 720  @ 1.60GHz)
>        OpenCL 1 (Quadro FX 880M)
> 
> I can only use 1 core as an OpenCL device.

Maybe in the CPU case we didn't think of automatically disabling the CPU
driver.  Nathalie, Sylvain, do you know about it?  I indeed don't see
that in the source code.

In the meanwhile, you can use STARPU_NCPU=0 to disable the CPU driver.
I believe the OpenCL driver actually does use all 4 cores, and it just
doesn't show up in StarPU just because that's hidden by the OpenCL
layer.

Samuel