Micro Benchmark Runner and JVM Options

This chapter provides tutorial notes and example codes on micro benchmark testing. Topics include micro benchmark guidelines; controlling and watching JIT compilation; controlling and watching GC.

What Is Micro Benchmark?

BenchmarkRunner.java - Benchmark Runner Program

emptyLoop() - The Empty Loop Test Method

"-XX:+PrintCompilation" - Watching JIT Compilation Logs

"-XX:+PrintGC" - Watching GC (Garbage Collection) Logs

"-Xms" and "-Xmx" - Avoiding GC with Large Memory Size

Benchmark Affected by Other Running Applications

"-Xint" - Running in Interpreted-Only Mode

Conclusions:

Table of Contents

 About This Book

 Downloading and Installing JDK 1.8.0 on Windows

 Downloading and Installing JDK 1.7.0 on Windows

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 Sun's JVM - Java HotSpot VM

 JRockit JVM 28.2.7 by Oracle Corporation

 JVM Runtime Data Areas

 Memory Management and Garbage Collectors

 Garbage Collection Tests

 JVM Stack, Frame and Stack Overflow

 Thread Testing Program and Result

 CPU Impact of Multi-Thread Applications

 I/O Impact of Multi-Thread Applications

 CDS (Class Data Sharing)

Micro Benchmark Runner and JVM Options

 Micro Benchmark Tests on "int" Operations

 Micro Benchmark Tests on "long" Operations

 Micro Benchmark Tests in JIT Compilation Mode

 Micro Benchmark Tests on "float" and "double" Operations

 Outdated Tutorials

 References

 PDF Printing Version