Skip to main content

NDArray::gpu

public function gpu(): NDArray;

Copy the NDArray to the GPU for computation. If the NDArray is already in VRAM, a copy will still be made.

Return​

Type NDArray

  • A copy of the NDArray but stored in VRAM.

Exceptions​

If no devices are detected or support GPU operations, a fatal error will be raised.

Fatal error: Uncaught Error: No GPU device available or CUDA not enabled in /src/test.php:8
Stack trace:
#0 /src/test.php(8): NDArray->gpu()

Notes​

tip

CUDA DEVICES​

You can use the dumpDevices method to check which devices were detected by NumPower. Currently only video cards with CUDA support are supported (NVIDIA).

Examples​

use \NDArray as nd;

$a = nd::array([2, -2,   3]);

$a_gpu = $a->gpu();

$a->dump();
$a_gpu->dump();
Output
=================================================
NDArray.uuid                    0
NDArray.dims                    [ 3 ]
NDArray.strides                 [ 4 ]
NDArray.ndim                    1
NDArray.device                  CPU
NDArray.refcount                1
NDArray.descriptor.elsize       4
NDArray.descriptor.numElements  3
NDArray.descriptor.type         float32
=================================================

=================================================
NDArray.uuid                    1
NDArray.dims                    [ 3 ]
NDArray.strides                 [ 4 ]
NDArray.ndim                    1
NDArray.device                  GPU
NDArray.refcount                1
NDArray.descriptor.elsize       4
NDArray.descriptor.numElements  3
NDArray.descriptor.type         float32
=================================================