Profiling using Easy Profiler

Step 1: Install Easy Profiler

Install Qt5 (Paket qt5-default), see Clone and build easy profiler. Then install easy profiler using make install and add to ld_path using ldconfig

Step 2: Prepare BARK Project

Make sure to have build:easy_profiler --linkopt='-L/usr/local/lib/ -leasy_profiler' --copt='-DBUILD_WITH_EASY_PROFILER'in your bazel.rc file. Include easy_profiler using \#include <easy/profiler.h>. In every function, you want to profile, write EASY_FUNCTION(); at the beginning. Defining the functions void profiler_startup() and void profiler_finish(), for example in some utility function

void profiler_startup() {
//  profiler::startListen();

void profiler_finish() {
  auto blocks_written = profiler::dumpBlocksToFile("/tmp/<some example>.prof");
  LOG(INFO) << "Easy profiler blocks written: " << blocks_written;

and wrap them to Python. In the python runtime, you then have to call them before and after the code you want to profile.

Step 3: Run BARK

The run: bazel run --config=easy_profiler <some example target> Make sure to only run a short example, otherwise the profiling dump will get too big. Profiling Dump should now be in /tmp/<some example>.prof.

Step 4: Open Dump with Easy Profiler

Go to the build directory of easy_profiler and run bin/profiler_gui. You then can use the GUI to open the dump file.