Book Image

Python Parallel Programming Cookbook - Second Edition

By : Giancarlo Zaccone
Book Image

Python Parallel Programming Cookbook - Second Edition

By: Giancarlo Zaccone

Overview of this book

<p>Nowadays, it has become extremely important for programmers to understand the link between the software and the parallel nature of their hardware so that their programs run efficiently on computer architectures. Applications based on parallel programming are fast, robust, and easily scalable. </p><p> </p><p>This updated edition features cutting-edge techniques for building effective concurrent applications in Python 3.7. The book introduces parallel programming architectures and covers the fundamental recipes for thread-based and process-based parallelism. You'll learn about mutex, semaphores, locks, queues exploiting the threading, and multiprocessing modules, all of which are basic tools to build parallel applications. Recipes on MPI programming will help you to synchronize processes using the fundamental message passing techniques with mpi4py. Furthermore, you'll get to grips with asynchronous programming and how to use the power of the GPU with PyCUDA and PyOpenCL frameworks. Finally, you'll explore how to design distributed computing systems with Celery and architect Python apps on the cloud using PythonAnywhere, Docker, and serverless applications. </p><p> </p><p>By the end of this book, you will be confident in building concurrent and high-performing applications in Python.</p>
Table of Contents (16 chapters)
Title Page
Dedication

Implementing point-to-point communication

Point-to-point operations consist of the exchange of messages between two processes. In a perfect world, every sending operation would be perfectly synchronized with the respective reception operation. Obviously, this is not the case, and the MPI implementation must be able to preserve the data sent when the sender and recipient processes are not synchronized. Typically, this occurs using a buffer, which is transparent to the developer and entirely managed by the mpi4py library.

The mpi4py Python module enables point-to-point communication via two functions:

  • Comm.Send(data, process_destination): This function sends data to the destination process identified by its rank in the communicator group.
  • Comm.Recv(process_source): This function receives data from the sourcing process, which is also identified by its...