Obtain memory usage and class for GPU variable

How can I get the amount of memory space (bytes) and the class (single/double/int) of a GPU variable? 'whos' doens't provide what I need. E.g.:

A=rand(1000,gpuArray);
infoA=whos('A');

gives: infoA =

          name: 'A'
          size: [1000 1000]
         bytes: 108
         class: 'gpuArray'
        global: 0
        sparse: 0
       complex: 0
       nesting: [1x1 struct]
    persistent: 0

but i still don't know how many bytes of GPU memory A is taking and whether A is a single / double etc.

Answer 1

[Matt J]

See whosGPU.

[Peter]

awesome, thanks!

Answer 2

[Edric Ellis]

Unfortunately, whos only reports the memory usage on the CPU of a gpuArray. For non-sparse gpuArray data, you can compute the number of bytes consumed like so:

dataType = classUnderlying(A);
switch dataType
  case 'double'
    bytesPerElem = 8;
  case 'single'
    bytesPerElem = 4;
  case 'logical'
    bytesPerElem = 1;
  otherwise
    bytesPerElem = str2double(regexprep(dataType, '[a-z]', '')) / 8;
end
if ~isreal(A)
  bytesPerElem = 2 * bytesPerElem;
end
totalBytes = bytesPerElem * numel(A);

[Peter]

Thanks Edric!