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[WIP] tracing: replacing trace_events with perfetto #35900

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wants to merge 3 commits into from
Closed

[WIP] tracing: replacing trace_events with perfetto #35900

wants to merge 3 commits into from

Commits on Nov 8, 2020

  1. deps: add perfetto

    @jasnell
    jasnell committed Nov 8, 2020
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  2. deps: add protobuf

    @jasnell
    jasnell committed Nov 8, 2020
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  3. tracing: use perfetto for tracing 

    This is still experimental. This enables the use of perfetto as a
replacement for the existing trace events mechanism in Node.js.
It's a significant change that impacts both v8 and core.

The build is still imperfect and needs some work. To enable
perfetto, use `./configure --use-perfetto`. Running `make` after
will likely fail the first time through, but should pass the second.

* The tracing format is changed from json to streamed protobufs.
* The existing tracing categories are changed.
* The JavaScript trace API has been changed completely.

This will be a breaking change to any code that builds on the
existing trace system.

There is still more here to do before this is ready to land.
    @jasnell
    jasnell committed Nov 8, 2020
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