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  • Book Overview & Buying Oracle JRockit: The Definitive Guide
  • Table Of Contents Toc
Oracle JRockit: The Definitive Guide

Oracle JRockit: The Definitive Guide

4.8 (10)
Buy this Book
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Oracle JRockit: The Definitive Guide

Oracle JRockit: The Definitive Guide

4.8 (10)
Buy this Book

Overview of this book

Oracle JRockit is one of the industry’s highest performing Java Virtual Machines. Java developers are always on the lookout for better ways to analyze application behavior and gain performance. As we all know, this is not as easy as it looks. Welcome to JRockit: The Definitive Guide.This book helps you gain in-depth knowledge of Java from the JVM’s point of view. We will explain how to write code that works well with the JVM to gain performance and scalability. Starting with the inner workings of the JRockit JVM and finishing with a thorough walkthrough of the tools in the JRockit Mission Control suite, this book is for anyone who wants to know more about how the JVM executes your Java application and how to profile for better performance.
Table of Contents (23 chapters)
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Oracle JRockit
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Oracle JRockit
Credits
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Credits
Foreword
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Foreword
About the Authors
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About the Authors
Acknowledgement
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Acknowledgement
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Getting Started
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Getting Started
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Obtaining the JRockit JVM
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Migrating to JRockit
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A note on JRockit versioning
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Getting help
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Summary
2
Adaptive Code Generation
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Adaptive Code Generation
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Platform independence
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The Java Virtual Machine
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Code generation strategies
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Adaptive code generation
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Inside the JIT compiler
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The JRockit code pipeline
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Controlling code generation in JRockit
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Summary
3
Adaptive Memory Management
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Adaptive Memory Management
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The concept of automatic memory management
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Fundamental heap management
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Garbage collection algorithms
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Speeding it up and making it scale
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Near-real-time garbage collection
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The Java memory API
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Pitfalls and false optimizations
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Controlling JRockit memory management
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Summary
4
Threads and Synchronization
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Threads and Synchronization
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Fundamental concepts
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Java API
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Implementing threads and synchronization in Java
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Optimizing threads and synchronization
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Pitfalls and false optimizations
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JRockit flags
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Summary
5
Benchmarking and Tuning
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Benchmarking and Tuning
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Reasons for benchmarking
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What to think of when creating a benchmark
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Deciding what to measure
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Industry-standard benchmarks
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The dangers of benchmarking
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Tuning
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Common bottlenecks and how to avoid them
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Wait/notify and fat locks
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Summary
6
JRockit Mission Control
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JRockit Mission Control
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Background
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Mission Control overview
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The Experimental Update Site
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Debugging JRockit Mission Control
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Summary
7
The Management Console
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The Management Console
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A JMX Management Console
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Using the console
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Extending the JRockit Mission Control Console
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Summary
8
The Runtime Analyzer
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The Runtime Analyzer
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The need for feedback
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Analyzing JRA recordings
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Troubleshooting
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Summary
9
The Flight Recorder
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The Flight Recorder
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The evolved Runtime Analyzer
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Flight Recorder in JRockit Mission Control
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Differences to JRA
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Adding custom events
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Extending the Flight Recorder client
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Summary
10
The Memory Leak Detector
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The Memory Leak Detector
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A Java memory leak
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Detecting a Java memory leak
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Memleak technology
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Tracking down the leak
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Interactive memory leak hunting
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The general purpose heap analyzer
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Allocation traces
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Troubleshooting Memleak
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Summary
11
JRCMD
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JRCMD
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Introduction
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Overriding SIGQUIT
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Limitations of JRCMD
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JRCMD command reference
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Summary
12
Using the JRockit Management APIs
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Using the JRockit Management APIs
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JMAPI
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JMXMAPI
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Summary
13
JRockit Virtual Edition
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JRockit Virtual Edition
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Introduction to virtualization
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Virtualizing Java
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A look ahead—can virtual be faster than real?
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Summary
1
Bibliography
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Bibliography
2
Glossary
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Glossary
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Abstract syntax tree
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Access file
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Adaptive code generation
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Adaptive memory management
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Agent
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Ahead-of-time compilation
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Allocation profiling
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AST
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Atomic instructions
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Automatic memory management
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Balloon driver
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Basic block
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Benchmark driver
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Biased locking
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Bytecode
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Bytecode interpretation
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Call profiling
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Card
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Card Table
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CAS
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Class block
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Class garbage collection
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Client-side template
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Cloud
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Code generation queue
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Color
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Compaction
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Compare and swap
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Compressed references
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Concurrent garbage collection
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Conservative garbage collection
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Constant pool
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Continuous JRA
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Control flow graph
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CPU profiling
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Critical section
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Dead code
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Deadlock
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Deadlock detection
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Design mode
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Deterministic garbage collection
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Diagnostic command
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Double-checked locking
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Driver
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Editor
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Escape analysis
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Event
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Event attribute
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Event field
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Event settings
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Event type
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Exact garbage collection
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Exact profiling
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Extension point
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Fairness
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Fat lock
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Fragmentation
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Free list
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Full virtualization
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GC heuristic
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GC pause ratio
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GC strategy
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Generation
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Generational garbage collection
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Graph coloring
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Graph fusion
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Green threads
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Guard page
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Guest
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Hard real-time
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Hardware prefetching
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Heap
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HIR
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Hosted hypervisor
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Hypervisor
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Inlining
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Intermediate representation
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Internal pointer
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IR
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Invocation counters
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Java bytecode
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Java Memory Model
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JFR
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JIT compilation
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JMAPI
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JMX
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JMXMAPI
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JRA
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JRCMD
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JRMC
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JRockit
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JRockit Flight Recorder
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JRockit Memory Leak Detector
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JRockit Mission Control
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JRockit Runtime Analyzer
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JSR
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JSR-133
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JSR-174
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JSR-292
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JVM Browser
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Keystore
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Lane
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Large pages
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Latency
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Latency threshold
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Lazy unlocking
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LIR
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Livelock
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Livemap
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Live object
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Live set
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Live Set + Fragmentation
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Lock deflation
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Lock fusion
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Lock inflation
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Lock pairing
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Lock token
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Lock word
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Mark and sweep
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Master password
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MBean
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MBean server
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MD5
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Memleak
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Memory Model
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Method garbage collection
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Micro benchmark
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MIR
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Mixed mode interpretation
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Monitor
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Name mangling
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Native code
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Native hypervisor
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Native memory
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Native threads
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Non-contiguous heaps
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NxM threads
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NUMA
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Nursery
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Obfuscation
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Object header
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Object pooling
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Old space
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On-stack replacement
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Operative set
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Optimization queue
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Out of the box behavior
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Overprovisioning
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OS threads

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Page protection
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Parallel garbage collection
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Paravirtualization
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Password file
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PDE
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Perspective
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Phantom References
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Prefetching
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Producer
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Promotion
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RCP
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Read barrier
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Real-time
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Recording agent
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Recording engine
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Recursive lock
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Reference compression
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Reference counting
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Reference decompression
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Register allocation
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Relational key
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Rich client platform
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Role
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Rollforwarding
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Root set
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Run mode
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Safepoint
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Samples
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Sample-based profiling
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Semaphore
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Server-side template
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Soft real-time
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Soft references
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Software prefetching
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Spilling
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Spinlock
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SSA form
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Static compilation
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Stop and copy
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Stopping the world
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Strong references
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SWT
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Synthetic attribute
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Tab group
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Tab group toolbar
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Thin lock
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Thread local allocation
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Thread local area
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Thread local heap
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Thread pooling
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Thread sampling
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Throughput
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TLA
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Tracing garbage collection
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Trampoline
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Trigger action
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Trigger condition
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Trigger constraint
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Trigger rule
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Truststore
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Virtualization
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Virtual machine image
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Volatile fields
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Warm up round
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Weak reference
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Write barrier
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Young space
3
Index
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Index

Java API

This section covers the built-in synchronization mechanisms in Java. These are convenient to have as intrinsic mechanisms in the language. There are, however, potential dangers of misusing or overusing Java synchronization mechanisms.

The synchronized keyword

In Java, the keyword synchronized is used to define a critical section. Both code blocks inside a method and entire methods can be synchronized. The following code example illustrates a synchronized method:

public synchronized void setGadget(Gadget g) {
  this.gadget = g;
}

As the method is synchronized, only one thread at a time can write to the gadget field in a given object.

In a synchronized method, the monitor object is implicit. Static synchronized methods use the class object of the method's class as monitor object, while synchronized instance methods use this. So, the previous code would be equivalent to:

public void setGadget(Gadget g) {
  synchronized(this) {
    this.gadget = g;
  }
}

The java.lang.Thread class

The built...

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Oracle JRockit: The Definitive Guide
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