1709104 - When IPC profiling is enabled, we should capture all IPC markers regardless of which threads are profiled

Status: RESOLVED FIXED

(Core :: Gecko Profiler, enhancement, P2)

Description

[Markus Stange [:mstange]]

To get IPC information, you currently have to profile the following threads:

1. The source and the destination thread of the IPC message, to get start/stop timings.
2. The threads "IPC I/O Parent" and "IPC I/O Child", to get various latency timings.
3. For messages that go through PBackground, you also need the PBackground thread.

That's because the IPC information is captured in markers, which are inserted on various threads. The profile front-end can only display the information if those markers have been captured, and the markers are only captured if the threads are profiled.

It would be great to find a different solution to this that does not require the other threads to be profiled. For example, maybe we could associate all IPC information markers with the main thread instead.

Comment 1

[Nazım Can Altınova [:canova][:canaltinova on phabricator]]

Attachment: Bug 1709104 - Send the IPC markers in sender/receiver/background threads to the main thread if they are not profiled r?gerald

Depends on D140088

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/76d6c7abf032
Send the IPC markers in sender/receiver/background threads to the main thread if they are not profiled r=gerald

Comment 3

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/76d6c7abf032