Cannot find the proper launch file

[Aerotic]

according to Callback duration analysis (Callback duration analysis) I should edit launch file in the path ros2_ws/src/ros2/tracing/tracetools_launch/launch/
I've finished previous steps, but I cannot find the directory ros2_ws/src/ros2. There are only two directories, ros-tracing and tracetools_analysis , in the path ros2_ws/src/
By the way, does the launch file refer to example.launch.py ? I've found multiple example.launch.py :

./install/tracetools_launch/share/tracetools_launch/launch/example.launch.py
./build/tracetools_launch/launch/example.launch.py
./src/ros-tracing/ros2_tracing/tracetools_launch/launch/example.launch.py

which one is used for the cmd ros2 launch tracetools_launch example.launch.py

[ralph-lange]

I just fixed the path in the tutorial (see 9eee478). Please edit the launch file in the src folder and then call colcon build and ros2 launch tracetools_launch example.launch.py again.

[christophebedard]

./install/tracetools_launch/share/tracetools_launch/launch/example.launch.py
./build/tracetools_launch/launch/example.launch.py
./src/ros-tracing/ros2_tracing/tracetools_launch/launch/example.launch.py
which one is used for the cmd ros2 launch tracetools_launch example.launch.py

It's all the same file. You should only modify the one in your src/ directory. The other ones are created/copied when you build your workspace.

[Aerotic]

./install/tracetools_launch/share/tracetools_launch/launch/example.launch.py
./build/tracetools_launch/launch/example.launch.py
./src/ros-tracing/ros2_tracing/tracetools_launch/launch/example.launch.py
which one is used for the cmd ros2 launch tracetools_launch example.launch.py

It's all the same file. You should only modify the one in your src/ directory. The other ones are created/copied when you build your workspace.

got it. thanks! 👍

[christophebedard]

Looks like this can be closed.