qml.devices.preprocess.validate_multiprocessing_workers¶
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validate_multiprocessing_workers(tape, max_workers, device)[source]¶ Validates the number of workers for multiprocessing.
Checks that the CPU is not oversubscribed and warns user if it is, making suggestions for the number of workers and/or the number of threads per worker.
- Parameters
tape (QuantumTape or QNode or Callable) – a quantum circuit.
max_workers (int) – Maximal number of multiprocessing workers
device (pennylane.devices.Device) – The device to be checked.
- Returns
The unaltered input circuit. The output type is explained in
qml.transform.- Return type
qnode (pennylane.QNode) or quantum function (callable) or tuple[List[QuantumTape], function]
code/api/pennylane.devices.preprocess.validate_multiprocessing_workers
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