MATLAB PARALLEL COMPUTING TOOLBOX - S Uživatelská příručka stáhnout pdf (Strana 261)

100

101

Establish Arrays on a GPU

9-3

Establish Arrays on a GPU

In this section...

“Transfer Arrays Between Workspace and GPU” on page 9-3

“Create GPU Arrays Directly” on page 9-4

“Examine gpuArray Characteristics” on page 9-7

Transfer Arrays Between Workspace and GPU

Send Arrays to the GPU

A gpuArray in MATLAB represents an array that is stored on the GPU. Use the

gpuArray function to transfer an array from MATLAB to the GPU:

N = 6;

M = magic(N);

G = gpuArray(M);

G is now a MATLAB gpuArray object that represents the magic square stored on the

GPU. The input provided to gpuArray must be numeric (for example: single, double,

int8, etc.) or logical. (See also “Considerations for Complex Numbers” on page 9-11.)

Retrieve Arrays from the GPU

Use the gather function to retrieve arrays from the GPU to the MATLAB workspace.

This takes an array that is on the GPU represented by a gpuArray object, and transfers

it to the MATLAB workspace as a regular MATLAB array. You can use isequal to

verify that you get the correct values back:

G = gpuArray(ones(100,'uint32'));

D = gather(G);

OK = isequal(D,ones(100,'uint32'))

Examples: Transfer Array

Transfer Array to the GPU

Create a 1000-by-1000 random matrix in MATLAB, and then transfer it to the GPU:

X = rand(1000);

G = gpuArray(X);

1 2 ... 256 257 258 259 260 261 262 263 264 265 266 ... 655 656

Komentáře k této Příručce

Žádné komentáře

MATLAB PARALLEL COMPUTING TOOLBOX - S Uživatelská příručka Strana 261

Komentáře k této Příručce

Související produkty a manuály pro Software MATLAB PARALLEL COMPUTING TOOLBOX - S