OpenCL: how to specify the number of computing units

By sergio.rui at Wed, Jan 27 2010 4:17am |

Hi,

I just started programming with OpenCL using a MacBookPro. The specifications say that the graphic card has 32 processing units, but OpenCL says only 4 are present. Why is this? Also how can you change the number of computing units that OpenCL uses?

Regards,

Sérgio Rui Silva

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Thu, 2010-01-28 11:56 — macleod

Compute Units

Compute units are your hardware. For example if you have a dual core CPU that would be two.

Your graphics card is also a compute unit.

So you cannot change it unless you alter your hardware.

32 processing units I guess means you have 32 threads in your streaming multiprocessor (SM).

There are some great video tutorials here on this site that cover the fundamentals.