Signal handling in multiprocessing children is not working correctly

[joshschmelzle]

There is a scenario where a child process spawned by the main multiprocessing PID dies and profiler does not stop. Need to investigate ways to better handle signals and stop profiler if there is a problem in one of the other processes.

[joshschmelzle]

More useful reference code here for working with multiprocessing.

https://docs.python.org/3/library/multiprocessing.html

https://docs.python.org/3/howto/logging-cookbook.html#logging-to-a-single-file-from-multiple-processes

https://www.blog.pythonlibrary.org/2016/08/02/python-201-a-multiprocessing-tutorial/

[joshschmelzle]

Use https://github.com/plasma-umass/scalene to help with profiling profiler