CUDA_ARRAY_DESCRIPTOR non-standard number of channels Need for bigger number of channels in CUarray

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,
Is it possible to define a CUDA array likewise:

CUDA_ARRAY_DESCRIPTOR desc;
    desc.Format = CU_AD_FORMAT_FLOAT;
    desc.NumChannels = 8;    // CUDA manual states: 'it MAY be 1, 2, or 4' - or does it MUST be so?
    desc.Width = size;
    desc.Height = 1;

Could the ‘desc.NumChannels’ be set to any number other then 1, 2, or 4?

Regards,
MK

2

The texture sampler hardware only supports 1,2 or 4 channels and the cudaArray is pretty much the abstraction of texture memory.
So no, it is not possible.

3

OK, thanks. I’ll need to use two of them then.

Regards,
MK