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A platform is a programming API used to access devices (GPUs/CPUs). For instance, one can have Intel, nVidia, or AMD APP platform.
$ python -c $'import pyopencl as cl\nfor p in cl.get_platforms(): print p'
<pyopencl.Platform 'AMD Accelerated Parallel Processing' at 0x7f0d93e62120>
A platform contains multiple devices. For example on a computer with an ATI card, Radeon is a device and should be in the output c.get_platforms()[0].get_devices(), along with the CPU.
$ python -c $'import pyopencl as cl\nfor p in cl.get_platforms()[0].get_devices(): print p'
<pyopencl.Device 'Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz' on 'AMD Accelerated Parallel Processing' at 0x22fa870>
Tags: programming
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