1823774 - Improve memory reporting for textures

Status: ASSIGNED

(Core :: Graphics, task, P3)

Description

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

When looking at memory reports with a lot of memory usage in GPU textures, it isn't clear why this is the case right now. We get some summary statistics here:

https://searchfox.org/mozilla-central/rev/f078cd02746b29652c134b144f0629d47e378166/gfx/thebes/gfxWindowsPlatform.cpp#227

But as I observed in a recent report, this doesn't make it clear to me if we are leaking memory, or not. It would be good to dump more information about:

• What owns the textures (compositing? specific media elements? canvas?)
• How many textures there are (how much from the summary stats is unaccounted for?)
• What kind of textures are they
• How long have the textures been alive
• When were they last used

I may not resolve all of those questions for all sources in this bug, but I would like to begin the work to do so and iterate over time.