[erlang-questions] Trace everything

[Vladimir Gordeev]

I know maybe it sounds really bad, but I want to trace whole running erlang
node.
I want to get following information:

* PidX spawns PidY
* PidX died or exited
* PidX sent message to PidY (message itself is ignored)

Actually, nothing more. Maybe couple hardcoded patterns on messages, to
count them differently.

What are the best ways to achieve it, without degrading much overall
performance? Is erlang:trace/3 okay for it? I've heard something about
using lttng for Erlang -- is it was I need?
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