I am trying to verify my interface with clBLAS before going completely in
to clMAGMA. However, I keep getting an OpenCL error -38 which corresponds
to invalid memory (CL_INVALID_MEM_OBJECT) when trying a clblasDgemm call.
This must be referring to the opencl memory handles I am passing in. The
fields generally accepts memory buffers (cl_mem) objects. I have tried
passing both A.handle.opencl_handle() and A.handle.opencl_handle().get() in
those fields but get the same error.
I will continue to poke around (maybe I need to use internal_size numbers)
but thought I would ask you about this.
Any insight?
Thanks,
Charles
On Fri, Aug 12, 2016 at 3:21 PM, Charles Determan <cdeterma...@gmail.com>
wrote:
> Thanks Karl,
>
> One followup question, what distinguishes handle(), handle1(), and
> handle2()? Do they refer to different buffers?
>
> Regards,
> Charles
>
> On Fri, Aug 12, 2016 at 3:13 PM, Karl Rupp <r...@iue.tuwien.ac.at> wrote:
>
>> Hi Charles,
>>
>> call .handle()/.handle1()/.handle2() to get the abstract memory buffers,
>> and call .opencl_handle() on them to get the cl_mem handles:
>>
>> A.handle().opencl_handle()
>>
>> Similarly, the command queue is obtained with
>> viennacl::ocl::get_queue().handle().get()
>>
>> Unfortunately it's not explicitly written in the manual :-/
>>
>> Best regards,
>> Karli
>>
>>
>> On 08/12/2016 09:39 PM, Charles Determan wrote:
>>
>>> I also would need to access the command queue handle (cl_command_queue)
>>> object to pass to clBLAS and clMAGMA functions. Is this easily
>>> accessible as well?
>>>
>>> Thanks,
>>> Charles
>>>
>>> On Fri, Aug 12, 2016 at 11:45 AM, Charles Determan
>>> <cdeterma...@gmail.com <mailto:cdeterma...@gmail.com>> wrote:
>>>
>>> Thanks Karl,
>>>
>>> I have been looking through the docs and I can't find an example for
>>> how to pull the OpenCL handles from a matrix. I saw a couple I
>>> think from a context but not sure that is what I need. Is this in
>>> the documentation somewhere? The closest I could fine is this page
>>> (http://viennacl.sourceforge.net/doc/manual-memory.html
>>> <http://viennacl.sourceforge.net/doc/manual-memory.html>).
>>>
>>> Regards,
>>> Charles
>>>
>>> On Wed, Aug 10, 2016 at 12:09 PM, <r...@iue.tuwien.ac.at
>>> <mailto:r...@iue.tuwien.ac.at>> wrote:
>>>
>>> Hi Charles,
>>>
>>>
>>> I have recently expressed some interest in different
>>> factorizations such as
>>> QR and SVD. I am aware that these or currently experimental
>>> within
>>> ViennaCL. Until such a time that these factorizations are
>>> fully supported
>>> (I hope to contribute but the algorithms are quite complex)
>>> would it be
>>> feasible to interface with a library like clMAGMA? I'm not
>>> sure of any
>>> other library offhand that does implement these methods. I
>>> thought perhaps
>>> VexCL but I couldn't find anything to that effect in the
>>> documentation.
>>>
>>>
>>> Sure, you can always grab the OpenCL handles from the matrices
>>> and plug that into clMAGMA.
>>> I don't think there is any value in ViennaCL wrapping the
>>> clMAGMA interfaces, though.
>>>
>>> Best regards,
>>> Karli
>>>
>>>
>>>
>>>
>>>
>>
>
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