Book Image

Hands-On Parallel Programming with C# 8 and .NET Core 3

By : Shakti Tanwar
Book Image

Hands-On Parallel Programming with C# 8 and .NET Core 3

By: Shakti Tanwar

Overview of this book

In today’s world, every CPU has a multi-core processor. However, unless your application has implemented parallel programming, it will fail to utilize the hardware’s full processing capacity. This book will show you how to write modern software on the optimized and high-performing .NET Core 3 framework using C# 8. Hands-On Parallel Programming with C# 8 and .NET Core 3 covers how to build multithreaded, concurrent, and optimized applications that harness the power of multi-core processors. Once you’ve understood the fundamentals of threading and concurrency, you’ll gain insights into the data structure in .NET Core that supports parallelism. The book will then help you perform asynchronous programming in C# and diagnose and debug parallel code effectively. You’ll also get to grips with the new Kestrel server and understand the difference between the IIS and Kestrel operating models. Finally, you’ll learn best practices such as test-driven development, and run unit tests on your parallel code. By the end of the book, you’ll have developed a deep understanding of the core concepts of concurrency and asynchrony to create responsive applications that are not CPU-intensive.
Table of Contents (22 chapters)
Free Chapter
1
Section 1: Fundamentals of Threading, Multitasking, and Asynchrony
6
Section 2: Data Structures that Support Parallelism in .NET Core
10
Section 3: Asynchronous Programming Using C#
13
Section 4: Debugging, Diagnostics, and Unit Testing for Async Code
16
Section 5: Parallel Programming Feature Additions to .NET Core

IIS threading model and internals

As the name suggests, these are services that are utilized on the Windows system to connect your web applications from other systems via the internet over a set of protocols such as HTTP, TCP, web sockets, and more.

In this section, we will discuss how the IIS threading model works. At the core of IIS lies the CLR thread pool. It's very important to understand how the CLR thread pool adds and removes threads in order to understand how IIS works to serve user requests.

Every application that gets deployed to IIS is assigned a unique worker process. Each worker process has two thread pools: the worker thread pool and the IOCP (short for I/O completion port) thread pool:

  • Whenever we create a new thread pool thread using either legacy ThreadPool.QueueUserWorkItem or TPL, the ASP.NET runtime makes use of worker threads for processing.
  • Whenever...