Install Jitwatch under Linux

Jitwatch is a log parser for Java hotspot JIT, which we can use to understand the behavior of Java hotspot JIT . This article is mainly about its installation, the steps are as follows:

(1) Download the Jitwatch jar Package:

wget https://adopt-openjdk.ci.cloudbees.com/job/jitwatch/jdk=JDK_1.7/ws/jitwatch-1.0.0-SNAPSHOT-JDK_1.7.tar.gz

This is the JDK1.7 version of the download. Unzip to get the jar package.

(2) get Jitwatch 's dependent jar package:

wget Https://github.com/AdoptOpenJDK/jitwatch/archive/master.zip

Unzip the file and get the associated jar package from the Lib directory.

(3) Place all the previously obtained jar packages in one directory:

(Jitwatch.out is generated by running the following command)

(4) Run the following command to start Jitwatch:

Java-cp/usr/lib/jvm/jdk1.7.0_67/lib:/usr/lib/jvm/jdk1.7.0_67/jre/lib/jfxrt.jar:jitwatch-1.0.0-snapshot.jar: Slf4j-api-1.7.7.jar:hamcrest-core-1.3.jar:logback-classic-1.1.2.jar:logback-core-1.1.2.jar Org.adoptopenjdk.jitwatch.launch.LaunchUI

The Jitwatch started:

Start Command analysis:

The/usr/lib/jvm/jdk1.7.0_67/lib:/usr/lib/jvm/jdk1.7.0_67/jre/lib/jfxrt.jar section needs to be set according to its own environment.

Org.adoptopenjdk.jitwatch.launch.LaunchUI can be obtained by analyzing the launchui.sh file for the Jitwatch project:

#!/bin/sh

Unamestr= ' uname '
If ["$JAVA _home" = "]; Then
If ["$unamestr" = ' Darwin ']; Then
Export java_home= '/usr/libexec/java_home '
Else
echo "Java_home have not been set."
Exit 0;
Fi
Fi

# Requires the jar to be built using
# MVN Package
# or
# ant Jar
#
#
# need to SET-XMX (max Heap) and-xx:maxpermsize
# If your hotspot.log references a lot of classes

Classpath= $CLASSPATH: Lib/logback-classic-1.1.2.jar
Classpath= $CLASSPATH: Lib/logback-core-1.1.2.jar
Classpath= $CLASSPATH: Lib/slf4j-api-1.7.7.jar
Classpath= $CLASSPATH: $JAVA _home/lib/tools.jar
Classpath= $CLASSPATH: $JAVA _home/jre/lib/jfxrt.jar
Classpath= $CLASSPATH: Target/jitwatch-1.0.0-snapshot.jar

"$JAVA _home/bin/java"-djava.library.path= $JAVA _home/lib/amd64-cp "$CLASSPATH" [email protected]Org.adoptopenjdk.jitwatch.launch.LaunchUI

(This article is a compilation code generated by the article using Hsdis and jitwatch to view analysis hotspot JIT compiler for an update on the Jitwatch installation part)

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Install Jitwatch under Linux