Huge Idle Wakeups when NSView with async CAOpenGLLayer

Originator:mblsha
Number:rdar://21960468 Date Originated:23-Jul-2015 04:23 PM
Status:Open Resolved:
Product:OS X Product Version:10.10.4 / 10.10.5
Classification: Reproducible:Yes
 
Summary:
There's a problem, that when there's async CAOpenGLLayer inside of a hidden view, there will be a huge number of idle wakeups in CAOpenGLLayer_timer_callback, but -[CAOpenGLLayer canDrawInCGLContext:...] is never called.

Chromium compositor checks for a number of idle canDrawInCGLContext:... calls before it disables async mode.

Steps to Reproduce:
Easiest way to reproduce:
1. Create async CAOpenGLLayer, add it to NSView
2. Allow for NSView to start drawing
3. Hide the view

I've attached a sample project.

Expected Results:
It would be nice that in that case there would either be no idle wakeups, or that canDrawInCGLContext:... will actually be called.

Actual Results:
1. Nothing is drawn on screen
2. Huge idle wakeups number
3. -[CAOpenGLLayer canDrawInCGLContext:...] is never called

Version:
OS X 10.10.4 (14E46)

Notes:


Configuration:


Attachments:
'CAOpenGLLayerTest.zip' was successfully uploaded.

Comments

Doesn't seem to reproduce on OS X 10.11.0

By mblsha at Oct. 9, 2015, 11:57 a.m. (reply...)

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