2010079 - Surprisingly high CPU usage in GMP process telemetry

Status: NEW

(Core :: Audio/Video: GMP, task)

Description

[Bas Schouten (:bas.schouten)]

While analyzing some power usage experiment we noticed there was a surprising amount of CPU usage in the GMP process.

https://protosaur.dev/perf-reports/adaptive-performance-power-saving-v1.html#Windows-power_cpu_time_per_process_type_ms

This is somewhat surprising given this is overall CPU usage including all time spent not watching videos using GMP. It would be good to better understand this and make sure this isn't a Firefox issue (or a telemetry collection issue).

Comment 1

[Andrew Osmond [:aosmond] (he/him)]

The GMP process is shutdown after being idle / no dependencies left, so I imagine it could relatively busy for as long as it exists. Not sure if the metrics cover that?

Comment 2

[Bas Schouten (:bas.schouten)]

Ah, that's an excellent suggestion, I believe we're incorrectly analyzing the data. We're redoing the analysis in a better way.