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I am new to OpenCL programming. What is the difference between device, context, and platform?
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1 Answer 1. A platform is a specific OpenCL implementation, for instance AMD APP, NVIDIA or Intel OpenCL. A context is a platform with a set of available devices for that platform. And the devices are the actual processors (CPU, GPU etc.) that perform calculations.
A platform is a specific OpenCL implementation, for instance AMD APP, NVIDIA or Intel OpenCL. A context is a platform with a set of available devices for that platform. And the devices are the actual processors (CPU, GPU etc.) that perform calculations. So if you use the Intel platform, a valid context with this platform would include a CPU device.
They consist for example of CPUs GPUs DSPs and FPGAs. OpenCL specifies a programming language (based on C99) for programming these devices and application programming interfaces (APIs) to control the platform and execute programs on the compute devices.
An implementation of OpenCL (actual 1.1 incomplete, mostly done AMD Radeon GCN) for a number of platforms is maintained as part of the Gallium Compute Project, [77] which builds on the work of the Mesa project to support multiple platforms.
A platform is a specific OpenCL implementation, for instance AMD APP, NVIDIA or Intel OpenCL. A context is a platform with a set of available devices for that platform. And the devices are the actual processors (CPU, GPU etc.) that perform calculations.
So if you use the Intel platform, a valid context with this platform would include a CPU device. While if you use the NVIDIA platform, a valid context would include an NVIDIA GPU device.
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