Thread Test on HotSpot JVM 10

This section provides a tutorial example to see how many running threads can be supported on HotSpot 1.7.0_45 Client and Server JVMs.

This test of CrashThread.java is done with HotSpot Client JVM 10 on my Windows 7 system.

C:\herong>\Progra~1\java\jdk-10.0.1\bin\javac CrashThread2.java

C:\herong>\Progra~1\java\jdk-10.0.1\bin\java CrashThread2 64

Time   Threads   T.Memory   F.Memory
9:01:34 PM   1   61440   58529
9:01:34 PM   2   61440   57055
9:01:34 PM   3   61440   57055
...
9:01:34 PM   62   61440   57055
9:01:34 PM   63   61440   57055
9:01:34 PM   64   61440   57055

There is no problem for HotSpot Client JVM 10 to support for 64 running threads. However, when I look at the Task Manager, I noticed that the JVM is taking 99% of CPU time and 27,084K of memory. And my computer becomes slow.

Last update: 2018.

Table of Contents

 About This Book

 JVM (Java Virtual Machine) Specification

 Java HotSpot VM - JVM by Oracle/Sun

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 JVM Runtime Data Areas

 JVM Stack, Frame and Stack Overflow

Thread Testing Program and Result

 CrashThread2.java - Thread Testing Program

Thread Test on HotSpot JVM 10

 Thread Test on HotSpot 1.7

 Thread Test on JRockit 28.7

 Thread Test on HotSpot 1.4 and JRockit 7.0

 Thread Test on HotSpot 1.6

 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

 JRockit JVM 28.2.7 by Oracle Corporation

 Outdated Tutorials

 References

 Full Version in PDF/EPUB