Reducing Context Switch Overhead

Table of contents:

Summary

Because one of the most common reasons to use threads is to exploit multiple processors, in discussing the performance of concurrent applications, we are usually more concerned with throughput or scalability than we are with raw service time. Amdahl's law tells us that the scalability of an application is driven by the proportion of code that must be executed serially. Since the primary source of serialization in Java programs is the exclusive resource lock, scalability can often be improved by spending less time holding locks, either by reducing lock granularity, reducing the duration for which locks are held, or replacing exclusive locks with nonexclusive or nonblocking alternatives.


Introduction

Part I: Fundamentals

Thread Safety

Sharing Objects

Composing Objects

Building Blocks

Part II: Structuring Concurrent Applications

Task Execution

Cancellation and Shutdown

Applying Thread Pools

GUI Applications

Part III: Liveness, Performance, and Testing

Avoiding Liveness Hazards

Performance and Scalability

Testing Concurrent Programs

Part IV: Advanced Topics

Explicit Locks

Building Custom Synchronizers

Atomic Variables and Nonblocking Synchronization

The Java Memory Model



Java Concurrency in Practice
Java Concurrency in Practice
ISBN: 0321349601
EAN: 2147483647
Year: 2004
Pages: 141

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