Re: [Starpu-devel] StarPU: OpenCL do not work well

[Nathalie Furmento <nathalie.furmento@labri.fr>]

It seems you are using a old version of StarPU. Could you please update to a newest version, and let us know if the problem is still there.

You can get StarPU latest nightly snapshot from the following page: http://starpu.gforge.inria.fr/testing/

Thanks,

Nathalie

On 14/03/2011 11:42, Leo Li wrote: Hi,

Sorry for late response.

I can not find code " clGetKernelWorkGroupInfo(...)" in vector_scal_opencl.c, so I can not have this value reported to you.

I replace the line with your suggested code, and my problem solved in the case. Thank you.

Sorry again for late responese.

On Mon, Mar 14, 2011 at 10:43 AM, Nathalie Furmento <nathalie.furmento@labri.fr> wrote:

-------- Original Message --------

Subject:	Re: [Starpu-devel] StarPU: OpenCL do not work well
Date:	Sat, 12 Mar 2011 00:47:53 +0100
From:	Sylvain HENRY <sylvain.henry@inria.fr>
To:	starpu-devel@lists.gforge.inria.fr

Hi,

For debugging purpose, could you add the following line in examples/basic_examples/vector_scal_opencl.c just after the clGetKernelWorkGroupInfo(...):

fprintf(stderr, "Work group size: %ld\n", local);

This should tell you what the block size used is. If it doesn't divide 2048, is equal to 0 or is greater than 1024, the error is here. Please report this value to us.

Anyway, for this particular case, replacing:
err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, &local, 0, NULL, NULL);
with
err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, NULL, 0, NULL, NULL);
in the same file, should solve the issue. (I didn't try this fix)

Cheers
Sylvain


Le 11/03/2011 21:34, Leo Li a écrit :

Hi, everybody

My name is Lu Li. I am a master student at Linkoping University, Sweden.

I currently do my master thesis based on StarPU under professor
Christoph W. Kessler. And I got a problem, could someone help me.
Thanks.

My problem is that  if I run vector_scale example after setting
environment variables:
export STARPU_NOPENCL=1
export STARPU_NCUDA=0
export STARPU_NCPUS=0
I will get an error(See attached invalid.jpg, the screenshot). StarPU
works fine with CPU and CUDA.

I have run some test on my OPENCL device.(Result shown in attached
file: oclDeviceQuery.txt) Seems Opencl device is ok. So There might be
some configuration problem on StarPU.

Could someone help me. I can offer more detail if needed. Thank you.
  

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Faithful
Lu Li


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