Java mission control linux

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JDK Mission Control 7 Installation Instructions

JDK Mission Control (JMC) 7 starts with Oracle JDK 8 (64-bit) and later. However, JMC 7 supports Java Management Console (JMX) monitoring and Java Flight Recorder (JFR) profiling of JVMs (JDK 7u40 and later) on any supported platform.

Prerequisite

Ensure you install JDK 8 (64-bit) or later. See JDK Installation Instructions.
Append /bin (or \bin for Windows) in the PATH environment variable. See Setting the PATH Environment Variable for Windows or your operating system documentation for Linux and macOS.
Ensure that the hsperfdata_username directory is present in the Windows $TEMP directory and is writable by the user.
For monitoring or recording a 32-bit JVM (JDK 7u40 and later), start the JVM with the following VM argument:

JMC Usage Instructions

Depending on your platform, run the following commands:

Linux

For example:

macOS

For example:

Double-click JDK Mission Control from Finder or drag JDK Mission Control.app to the Applications directory to access from Launchpad.

Windows

For example:

Double-click jmc.exe from Windows Explorer.

Specify the JDK Version to be Used by JMC

If there are multiple JDK versions installed, it is recommended to use the latest version of JDK to run JMC.

Edit the JMC launch configuration (jmc.ini) file and add the location of the JDK version to use (JDK 8 (64-bit) or later required). In Windows and Linux, the jmc.ini file is found under the bin directory; and in macOS, under JDK\ Mission\ Control.app/Contents/Eclipse directory.

Add the -vm flag and /bin ( \bin for windows) as shown in the following example. Ensure it is added just before the -vmargs flag.

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2 Using the Java Mission Control Client

This chapter describes how to start the JMC client and use its features.

Java Mission Control requires a commercial license for use in production. To learn more about commercial features and how to enable them please visit http://www.oracle.com/technetwork/java/javaseproducts/ .

The JMC client is the main application from which you connect to JVMs and start the tools included in Java Mission Control. You can run the JMC client either as a standalone application or as an Eclipse plug-in. Ensure that you run the JMC client in a secure environment, because it does not include or run with a security manager.

2.1 Starting the Java Mission Control Client

The JMC client executable file is located in the bin directory of the Java SE Development Kit (JDK) installation path ( JAVA_HOME ). If the JAVA_HOME/bin directory is in the PATH environment variable, you can start the JMC client by entering jmc at the command-line prompt (shell). Otherwise, you have to specify the full path to the JMC executable:

JAVA_HOME/bin/jmc (Linux, OS X)

On Windows, a shortcut to the JMC client executable is added to the Java Development Kit folder under All Programs in the Start menu.

On OS X, if you cannot find the JMC executable or locate JMC in Spotlight, you can start JMC from the command line using /Library/Java/JavaVirtualMachines/jdk version >.jdk/Contents/Home/bin/jmc . Alternatively, use Finder to browse to /Library/Java/JavaVirtualMachines/jdk version >.jdk/Contents/Home/lib/missioncontrol and double-click the Java Mission Control app.

On OS X, when you launch the JMC executable, the Terminal window opens. When you close the JMC client, the Terminal is left behind with the text [Process completed] . To avoid this, open the Terminal Preferences , then open the Settings tab, select the scheme you use, then select the Shell tab, and change the When the shell exits option to Close if the shell exited cleanly .

Passing JVM Options To the JMC Launcher

JMC is a Java application, and the JMC client executable is a launcher for this application. JMC startup is controlled by options specified in the jmc.ini file, which is located in the JAVA_HOME/bin directory. Arguments to the -vmargs option in the jmc.ini file are options that are passed to the JVM running the JMC application. You can specify these options to control the way this JVM runs. If you do not want to modify the jmc.ini file, you can specify JVM options on the command line as arguments to the -vmargs option of the jmc command.

If other options are specified for the jmc command, the -vmargs option must be specified last.

To start the JMC client with your own set of JVM options (overriding those specified in the jmc.ini file), run the following command (separate multiple arguments with spaces):

jmc -vmarg arguments

To start the JMC client with additional JVM options (appending them to those specified in the jmc.ini file), run the following command (separate multiple arguments with spaces):

jmc —launcher.appendVmargs -vmarg arguments

Using a Workspace Directory

If you want to copy your settings for the JMC client to another computer or another user, or use different predefined settings for different applications, add the -data command-line option and define a workspace directory when you start the JMC client:

jmc -data workspace-directory

2.2 Java Mission Control Client GUI

When you first launch the JMC client, the left part of the window contains two views by default:

JVM Browser is the plug-in that shows all available JVM connections.

Event Types contains a list of event types for a selected flight recording. For information about opening a flight recording, see the Java Flight Recorder plug-in section of the online help.

You can open the Window menu, select Show View and then Other to open a window that lists all available views. Select the necessary views and click OK to open them. The following views are available in addition to the default ones:

Properties lists the properties of items that you select in tables, including hidden properties that are not displayed in the tables.

Progress View displays the progress of running operations, for example, a flight recording.

Help displays the Java Mission Control online help.

The other part of the JMC client window is reserved for the Editor Area, which is used to work with the plug-ins for available JVM connections. To launch a plug-in, right-click a JVM connection and select the plug-in ( Start JMX Console , Open Historical Data , Start Flight Recording , etc.).

2.2.1 Tabs and Tab Groups

Views and editors are displayed as tabs united into tab groups. You can drag tabs and tab groups around the JMC client window to create a layout that works best for you. View tabs and tab groups can even be detached from the main window.

You can maximize a tab group to the size of the JMC client window or minimize it to make more room for other tab groups:

To maximize a tab group, click the Maximize button in the top-right corner. The tab group expands almost to the size of the JMC client window and the Maximize button changes to the Restore button. The other tab groups are automatically minimized.

To minimize a tab group, click the Minimize button in the top-right corner. The tab group shrinks and the Minimize button changes to the Restore button. The other tab groups fill the rest of the JMC client window proportionally.

To restore the tab to its original state, click the Restore button.

To separate logically related information, editor tabs are divided into subtabs (or subtab groups), allowing you to drill down into specific data. Some of the subtabs have buttons to control the data displayed in them to the right of the subtab name.

2.2.2 Panels

Editor tabs are composed of panels with logically related information in the form of graphs, tables, lists, and so on. You can modify some of the parameters using various controls in the panels, such as buttons, text fields, drop-down lists, and so on.

Some panels can be collapsed to make more room for other panels in the tab (using the black triangle show and hide button next to the panel name). To the right of the panel name, there are buttons to add and remove components, refresh data, switch modes, change settings, get online help about the panel, and so on.

Most panels are unique, but some are similar for different tabs. Information for using each panel is provided in the description for the panel. To see this information, click the question mark button to the right of the panel name.

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Java mission control linux

JDK Mission Control (JMC) 8.0 and 8.0.1 starts with Oracle JDK 8 (64-bit), and from JMC 8.1.0 onwards it requires Oracle JDK 11 and later. However, JMC 8 supports Java Management Console (JMX) monitoring and Java Flight Recorder (JFR) profiling of JVMs (JDK 7u40 and later) on any supported platform.

Prerequisite

Ensure you install JDK 8 for JMC 8.0 and JMC 8.0.1, and JDK 11 or later for JMC 8.1.0 onwards. See: JDK 11 Installation Instructions or JDK 8 Installation Instructions as applicable.
Ensure that the hsperfdata_username directory is present in the Windows $TEMP directory (for example, C:\Users\user_name\AppData\Local\Temp\hsperfdata_username) and is writable by the user. In case there are any issues while starting JMC with user permissions, then start JMC as an administrator. Also ensure that you are using a file system that supports ACL.
For monitoring or recording a 32-bit JVM (JDK 7u40 and later), start the JVM with the following VM argument:

JMC Usage Instructions

Depending on your platform, run the following commands:

Linux

For example:

macOS

For example:

Double-click JDK Mission Control from Finder or drag JDK Mission Control.app to the Applications directory to access from Launchpad.

Windows

For example:

Double-click jmc.exe from Windows Explorer.

Specify the JDK Version to be Used by JMC

If there are multiple JDK versions installed, it is recommended to use the latest version of JDK to run JMC.

Edit the JMC launch configuration (jmc.ini) file and add the location of the JDK version to use (JDK 8 (64-bit) or later required). In Windows and Linux, the jmc.ini file is found under the JDK Mission Control directory; and in macOS, under JDK\ Mission\ Control.app/Contents/Eclipse directory.

Add the -vm flag and /bin ( \bin for windows) as shown in the following example. Ensure it is added just before the -vmargs flag.

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Java mission control linux

Mission Control is an open source production time profiling and diagnostics tool for Java.

Builds of Mission Control can currently be found in the Oracle JDK on supported platforms and in the Eclipse marketplace.

For more information on Mission Control, see http://www.oracle.com/missioncontrol.

Binary distributions of JDK Mission Control are provided by different downstream vendors.

Released version
EA builds of upcoming release
Downloadable Eclipse update site archive

Azul (Zulu Mission Control)

Bell-Soft (Liberica Mission Control)

Released version
Integrated (in-app) update site
Eclipse update site

Red Hat distributes JDK Mission Control in Red Hat Enterprise Linux (RHEL). JMC is available in RHEL 7 as the rh-jmc Software Collection, and is provided in RHEL 8 by the jmc:rhel8 module stream. JMC is also included in the OpenJDK developer builds for Windows.

Mission Control Features

A framework for hosting various useful Java tools

A tool for visualizing the contents of Java flight recordings, and the results of an automated analysis of the contents

A tool for heap waste analysis

Core API Features

Core APIs for parsing and processing Java flight recordings

Core API can read recordings from JDK 7 and above

Core API can run on JDK 8 and above

Core API contains a framework for handling units of measurement and physical quantities

Core API supports headless analysis of Java flight recordings

Core API Example

Example for producing an HTML report from the command line:

Example for finding the standard deviation for the java monitor events in a recording:

Example for programmatically running the rules:

Example for programmatically running rules in parallel:

Building Mission Control from Source

Prerequisites for building Mission Control:

Install JDK 11, and make sure it is the JDK in use (java -version)

Install Maven (version 3.5.x. or above)

On Linux or macOS you can use the build.sh script to build JMC:

Otherwise follow the steps manually:

First get third party dependencies into a local p2 repo and make it available on localhost:

Then in another terminal (in the project root):

Note that you may need to define proxy settings if you happen to be behind a firewall. In your

/.m2/settings.xml file (if you have none, simply create one), add:

To run the unit tests:

To run the UI tests:

Note that the UI tests will take some time to run, and that you need to stop interacting with your computer for the duration of the tests.

Spotbugs can take some time to run. If you are only interested in the test results, you can skip running spotbugs by setting -Dspotbugs.skip=true .

Filtering Test Runs

Aside from the from the simple -test Maven flag test classes that should be run/not run can be specified by means of the system properties «test.includes» and/or «test.excludes». Multiple patterns can be specified by comma separation.

When specifying both test.includes and «test.excludes» the test.excludes takes precedence and filters out tests that also are matched by «test.includes».

The above will not run StacktraceModelTest, as that is also matched by «test.excludes».

Note that if UI-tests are supposed to be part of the filtered run the «uitests» profile needs to be specified as well. Otherwise the UI won’t start up and so the tests fail.

Building using docker and docker-compose

Once build has finished the results will be in the target directory

Running the Locally Built JMC

The built JMC will end up in the target folder in the root. The launcher is located in target/products/org.openjdk.jmc/

. By default whichever JRE is on the path will be used. Remember to set it to a JDK (rather than a JRE) if you want the launched mission control to automatically discover locally running JVMs. To override which JVM to use when launching, add -vm and the path to a directory where a JDK java launcher is located, for example -vm $JAVA_HOME/bin.

Here is an example for Mac OS X:

Here is an example for Linux:

And here is an example for Windows x64:

Using the Built JMC Update Site in Eclipse

As part of the JMC build, the JMC update sites will be built.

There is one update site for the stand-alone RCP application, providing plug-ins for the stand-alone release of JMC:

There is another update site for the Eclipse plug-ins, providing plug-ins for running JMC inside of Eclipse:

To install it into Eclipe, simply open Eclipse and select Help | Install New Software. In the dialog, click Add. and then click the Archive. button. Select the built update site, e.g.

Setting up Development Environment

For help with frequently asked questions, see the JMC FAQ on the JMC Wiki.

The Mission Control source code is made available under the Universal Permissive License (UPL), Version 1.0 or a BSD-style license, alternatively. The full open source license text is available at license/LICENSE.txt in the JMC project.

Mission Control is an open source project of the OpenJDK. The Mission Control project originated from the JRockit JVM project.

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