Profiling Forge

Forge can be easily profiled using the YourKit Java Profiler.

Copy the YourKit module into your forge installation

cp -R $FORGE_SOURCES/dist/src/main/resources/modules/com/yourkit $FORGE_HOME/modules/com

Copy the YourKit JAR into the YourKit module

cp $YOURKIT_HOME/lib/yjp.jar $FORGE_HOME/modules/com/yourkit/profiler/main/yjp.jar

Set the profiler JVM agent for your installation and OS_PATH, and add the module to the System module

Make sure you use the appropriate path to your installation directory and version , and replace variables with those appropriate for your environment.

OSX

export FORGE_OPTS="-Djboss.modules.system.pkgs=com.yourkit -agentpath:$YOURKIT_HOME/bin/mac/libyjpagent.jnilib=sampling,onexit=snapshot,delay=0"

Linux

export FORGE_OPTS="-Djboss.modules.system.pkgs=com.yourkit -agentpath:$YOURKIT_HOME/bin/$OS_ARCH/libyjpagent.$LIB_EXTENSION=sampling,onexit=snapshot,delay=0"

Windows

set FORGE_OPTS="-Djboss.modules.system.pkgs=com.yourkit -agentpath:%YOURKIT_HOME%/bin/%OS_ARCH%/libyjpagent.%LIB_EXTENSION%=sampling,onexit=snapshot,delay=0"

Start Forge

forge

Run YourKit

And open the newly generated Snapshot located in $HOME/Snapshots