Having 1 cpu + 1 GPU , how to choose special device when using reikna cluda.ocl_api?

[Chen Dong]

Available devices: 

Quadro P2000 (NVIDIA Corporation)

Quadro P2000 (NVIDIA Corporation)

pthread-AMD Ryzen 7 1700X Eight-Core Processor (AuthenticAMD)

Time using OpenCL 2.0 pocl 0.13, LLVM 3.8.1 on pthread-AMD Ryzen 7 1700X Eight-Core Processor: 0.031108 seconds

Finished!

I intend to use Quadro P2000 instead of Ryzen 1700x....

Pls help!

Thanx in advance!

[Bogdan Opanchuk]

There are three possible ways. First, you can select the device manually and pass it to the Thread constructor:

from reikna.cluda import ocl_api

api = ocl_api()

device = api.get_platforms()[0].get_devices()[1] # or whichever device you want

thread = api.Thread(device)

Alternatively, you can supply inclusion/exclusion masks to Thread.create():

api = ocl_api()

thread = api.Thread.create(device_filters=dict(include_devices='Quadro')) # this will select the first Quadro card

(see http://reikna.publicfields.net/en/latest/api/cluda.html#reikna.cluda.api.Thread.create for more options)

Finally, you can select the device interactively:

api = ocl_api()

thread = api.Thread.create(interactive=True) # this will display a menu with possible options and wait for your input