platforms in OpenCL

Question

I have Nvidia Graphics card(GeForce GT 640) ON MY MOTHERBOARD. I have installed OpenCL on my box. When I query about platform using "clGetPlatformInfo(parameters)", I see the following output:- #Available platforms: 1. #1 CL_PLATFORM_NAME: NVIDIA CUDA #1 CL_PLATFORM_PROFILE: FULL_PROFILE #1 CL_PLATFORM_VERSION: OpenCL 1.1 CUDA 4.2.1 #1 CL_PLATFORM_VENDOR: NVIDIA Corporation

What should I infer from the above output? As per my understanding CUDA and OpenCL are two different platform. The output says total available platform is:1, platform name is CUDA and version is OpenCL and CUDA. I am to totally confused.

The fact that clGetPlatformInfo queries the properties of an OpenCL platform and not some arbitrary unrelated information should be enough to infer that the queried platform actually is a valid OpenCL platform. In the end platform names and version strings can be completely arbitrary and in this case it just means that this platform is somehow related to CUDA (in this case bundled with and implemented by). — Christian Rau
– Christian Rau, Commented Jun 7, 2013 at 12:33

Erik Smistad · Accepted Answer · 2013-05-23 09:40:38Z

5

NVIDIA's OpenCL platform is bundled with the CUDA toolkit, not to be confused with the CUDA programming language. You have version 4.2.1 of the CUDA toolkit which contains OpenCL 1.1. You can have more than one OpenCL platforms installed (Intel and AMD has their own platforms).

answered May 23, 2013 at 9:40

Erik Smistad

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