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Exception while executing a 3D kernel

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suleman

Exception while executing a 3D kernel

Hi,

While using the clEnqueueNDRangeKernel (with 3 dimensional kernel) i got following exception,
I have created a PointerBuffer and passed an array in this buffer, then the pointer buffer is passed to the "putNDRangeKernel" call. What mistake am i doing here??

Code sample:

PointerBuffer offSets = PointerBuffer.allocate(1);
offSets.put(globalWorkOffsets, 0, 1);
....
device.getCommandQueue().putNDRangeKernel(clkernel, 3, offSets, globalSizes, localSizes);

com.jogamp.opencl.CLException: Argument "global_work_offset" was not a direct buffer
at com.jogamp.opencl.impl.CLAbstractImpl.clEnqueueNDRangeKernel(CLAbstractImpl.java:707)
at com.jogamp.opencl.CLCommandQueue.putNDRangeKernel(CLCommandQueue.java:1544)

Michael Bien

Re: Exception while executing a 3D kernel

replace

PointerBuffer.allocate(1);

with

PointerBuffer.allocateDirect(1);

and don't forget to rewind the buffer

(hmm maybe we should add a utility 3D method like the 1D and 2D methods)

-michael
On 04/21/2011 04:54 PM, suleman [via jogamp] wrote:

>
> Hi,
>
> While using the clEnqueueNDRangeKernel (with 3 dimensional kernel) i got
> following exception,
> I have created a PointerBuffer and passed an array in this buffer, then the
> pointer buffer is passed to the "putNDRangeKernel" call. What mistake am i
> doing here??
>
> Code sample:
>
> PointerBuffer offSets = PointerBuffer.allocate(1);
> offSets.put(globalWorkOffsets, 0, 1);
> ....
> device.getCommandQueue().putNDRangeKernel(clkernel,
> 3, offSets, globalSizes, localSizes);
>
>
>
> com.jogamp.opencl.CLException: Argument "global_work_offset" was not a
> direct buffer
> at
> com.jogamp.opencl.impl.CLAbstractImpl.clEnqueueNDRangeKernel(CLAbstractImpl.java:707)
> at
> com.jogamp.opencl.CLCommandQueue.putNDRangeKernel(CLCommandQueue.java:1544)
>
>
> _______________________________________________
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http://michael-bien.com/

suleman

Re: Exception while executing a 3D kernel

Thanks a lot for quick responce

yes, it will be nice if you add a utility function also for 3D kernels.

suleman

Re: Exception while executing a 3D kernel

Hi,

I changed the code assaid by you, but now the JVM crashes? Is there a bug in the implementation (by me or jocl library) or do i have a older version?
Currently i am using (08-03-2011) version

PointerBuffer offSets = PointerBuffer.allocateDirect(1);
offSets.put(globalWorkOffsets,0,1);
offSets.rewind();

PointerBuffer globalSizes = PointerBuffer.allocateDirect(1);
globalSizes.put(globalWorkSizes, 0, 1);
globalSizes.rewind();

PointerBuffer localSizes = PointerBuffer.allocateDirect(1);
localSizes.put(localWorkSizes, 0, 1);
localSizes.rewind();

//Execute the 3D kernel
device.getCommandQueue().putNDRangeKernel(clkernel, 3, offSets, globalSizes, localSizes);

Michael Bien

Re: Exception while executing a 3D kernel

if you use a 3d kernel all offsets and sizes must be 3 element vectors.

PointerBuffer offsets = PointerBuffer.allocateDirect(new long[]{first,
second, third});
or
offsets.put(first).put(second).put(third).rewind();

rewind puts the read/write index to 0. The first method does that
automatically. You don't have to rewind if you address the position via
a index. e.g: .put(0, first);

offSets.put(globalWorkOffsets,0,1);

inserts only the first element since the lenght was set to 1.

-michael

On 04/21/2011 05:49 PM, suleman [via jogamp] wrote:

>
> Hi,
>
> I changed the code assaid by you, but now the JVM crashes? Is there a bug in
> the implementation (by me or jocl library) or do i have a older version?
> Currently i am using (08-03-2011) version
>
>
> PointerBuffer offSets = PointerBuffer.allocateDirect(1);
> offSets.put(globalWorkOffsets,0,1);
> offSets.rewind();
>
> PointerBuffer globalSizes = PointerBuffer.allocateDirect(1);
> globalSizes.put(globalWorkSizes, 0, 1);
> globalSizes.rewind();
>
> PointerBuffer localSizes = PointerBuffer.allocateDirect(1);
> localSizes.put(localWorkSizes, 0, 1);
> localSizes.rewind();
>
> //Execute the 3D kernel
> device.getCommandQueue().putNDRangeKernel(clkernel, 3, offSets,
> globalSizes, localSizes);
>
> _______________________________________________
> If you reply to this email, your message will be added to the discussion below:
> http://forum.jogamp.org/Exception-while-executing-a-3D-kernel-tp2847306p2847490.html
> To start a new topic under jogamp, email [hidden email]
> To unsubscribe from jogamp, visit