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

["Alin Dobre" <alin.dobre@movidius.com>]

Hi Samuel,

 

I managed to get it running.

I wasn’t aware initially that StarPU automatically marks the graphics cards as CUDA devices even if I set STARPU_NOPENCL=2, unless STARPU_NCUDA=0 is set.

 

Thanks,

Alin

 

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-----Original Message-----
From: Samuel Thibault [mailto:samuel.thibault@ens-lyon.org]
Sent: Thursday, December 20, 2012 6:58 PM
To: Alin Dobre
Cc: starpu-devel@lists.gforge.inria.fr; brendan.barry@movidius.com; david.nicholls@movidius.com
Subject: Re: Peppher: Running StarPU + OpenCL on Cora

 

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