How to use GPERFTool

AzerothCore integrates the google performance tools library that allows you to analyse the code execution of your application when it comes to CPU and Memory. In short: thread-friendly heap-checker, heap-profiler, and cpu-profiler.

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Run in a terminal: sudo apt-get install google-perftools libgoogle-perftools-dev

Note: dependencies above are already installed in our docker file

1. To enable the gperftools you need to compile with the -DWITH_PERFTOOLS=ON -DNOJEM=ON -DWITH_DYNAMIC_LINKING=0 compiler flag. You can use CUSTOMOPTIONS in config.sh to set it for the dashboard compiler. You also need to set the CTYPE conf to at least RelWithDebInfo (faster but less info) or Debug (slower but more info).
2. Configure the variables inside the config.sh, at the GOOGLE PERF TOOLS section, accordingly to your needs.
3. run the worldserver with the sudo ./acore.sh run-worldserver
4. run sudo killall -12 worldserver This command will start the monitoring process.
5. Run sudo killall -12 worldserver again to stop the process when you want. At this time you will have the .prof file ready in the folder configured below.
6. Run google-pprof --callgrind <path/of/worldserver/bin> </path/of/prof/file> > worldserver.callgrind This will generate a callgrind file that can be read with QCacheGrind, KCacheGrind or any other compatible tools.

This is what you will see (screenshot of KCacheGrind):