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A comment on The web at maximum FPS: How WebRender gets rid of jank. Parent comment

Re:The web at maximum FPS: How WebRender gets rid of jank by pohl on Tuesday October 10, 2017 @01:57PM (#15443865)
The Radeon Pro 560 on my MacBook Pro can draw "up to 75W". I don't know anything about how it manages power, but I do recall that Apple recommended in a WWDC session on writing energy-efficient apps that one should be careful to not trigger the discrete GPU when the integrated Intel GPU is sufficient. So that leads to another question: on my machine, which GPU would Webrender be using? I suppose I could find out experimentally, but I thought I'd ask in case someone here knows.
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Re:The web at maximum FPS: How WebRender gets rid of jank by metajack on Tuesday October 10, 2017 @02:38PM (#15444227)
For WebRender, we targeted the integrated GPUs. You still need some logic to ensure you don't accidentally kick the discrete one into gear, but the integrated ones definitely have enough performance for almost anything WR will throw at it.
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Re:The web at maximum FPS: How WebRender gets rid of jank by dman on Tuesday October 10, 2017 @08:34PM (#15446410)
Could you elaborate the edge cases which fall beyond "almost anything WR will throw at it" ie what are the use cases where you would end up waking the discrete GPU?
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Re:The web at maximum FPS: How WebRender gets rid of jank by lightedman on Wednesday October 11, 2017 @02:48AM (#15447736)
I would personally imagine anything more complex than Quake Live would probably trigger the discrete GPU.
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Re:The web at maximum FPS: How WebRender gets rid of jank by esaym on Tuesday October 10, 2017 @06:36PM (#15445899)
Is there any requirements for a minimum version of opengl for WebRender that you know of?
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Re:The web at maximum FPS: How WebRender gets rid of jank by pohl on Tuesday October 10, 2017 @02:57PM (#15444384)
That's encouraging news. Thank you!
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Re:The web at maximum FPS: How WebRender gets rid of jank by epmaybe on Tuesday October 10, 2017 @02:01PM (#15443900)
Since the 15" MBP charger can deliver up to 87W, if you have full power draw on the MBP will you actually not be able to fully supply power over AC? I assume that the CPU also takes up around 20-30W.
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Re:The web at maximum FPS: How WebRender gets rid of jank by hajile on Tuesday October 10, 2017 @04:59PM (#15445264)
The bigger issue is that mac cooling is usually very small. You'll run into thermal throttling long before you can dissipate a 75w TDP.
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Re:The web at maximum FPS: How WebRender gets rid of jank by unilynx on Tuesday October 10, 2017 @03:10PM (#15444497)
The MBPs pull power from both AC and the battery if needed.
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