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Mastering Concurrency in Python

You're reading from   Mastering Concurrency in Python Create faster programs using concurrency, asynchronous, multithreading, and parallel programming

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Product type Paperback
Published in Nov 2018
Publisher Packt
ISBN-13 9781789343052
Length 446 pages
Edition 1st Edition
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Concepts
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Author (1):
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Quan Nguyen Quan Nguyen
Author Profile Icon Quan Nguyen
Quan Nguyen
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Table of Contents (22) Chapters Close

Preface 1. Advanced Introduction to Concurrent and Parallel Programming FREE CHAPTER 2. Amdahl's Law 3. Working with Threads in Python 4. Using the with Statement in Threads 5. Concurrent Web Requests 6. Working with Processes in Python 7. Reduction Operators in Processes 8. Concurrent Image Processing 9. Introduction to Asynchronous Programming 10. Implementing Asynchronous Programming in Python 11. Building Communication Channels with asyncio 12. Deadlocks 13. Starvation 14. Race Conditions 15. The Global Interpreter Lock 16. Designing Lock-Based and Mutex-Free Concurrent Data Structures 17. Memory Models and Operations on Atomic Types 18. Building a Server from Scratch 19. Testing, Debugging, and Scheduling Concurrent Applications 20. Assessments 21. Other Books You May Enjoy

Chapter 13

What is starvation, and why is it undesirable in a concurrent program?

Starvation is a problem in concurrent systems in which a process (or a thread) cannot gain access to the necessary resources to proceed with its execution, and therefore, cannot make any progress.

What are the underlying causes of starvation? What are the common superficial causes of starvation that can manifest from the underlying cause?

Most of the time, a poorly coordinated set of scheduling instructions is the main cause of starvation. Some high-level causes for starvation might include the following:

  • Processes (or threads) with high priorities dominate the execution flow in the CPU, and thus, low-priority processes (or threads) are not given the opportunity to execute their own instructions.
  • Processes (or threads) with high priorities dominate the usage of non-shareable resources, and thus...
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