Hands-On GPU Programming with Python and CUDA

Multiple contexts for host-side concurrency

Let's first briefly review how to create a single host thread in Python that can return a value to the host with a simple example. (This example can also be seen in the single_thread_example.py file under 5 in the repository.) We will do this by using the Thread class in the threading module to create a subclass of Thread, as follows:

import threadingclass PointlessExampleThread(threading.Thread):

We now set up our constructor. We call the parent class's constructor and set up an empty variable within the object that will be the return value from the thread:

def __init__(self):    threading.Thread.__init__(self)    self.return_value = None

We now set up the run function within our thread class, which ...