[MBI] Visualizing per-ASG task queue migration progress

[Minoru Chikamune]

Hi,

We implemented some metrics to visualize the per-ASG migration progress.

These metrics will help us to understand our progress and also hopefully

will inspire us which part is more problematic.

TL;DR is that 85% of renderer main thread tasks will run on AgentGroupScheduler

or FrameScheduler managed task queues with ToT with MBI flag enabled.

Please check the document below if you are interested.

https://docs.google.com/document/d/1aE76rsDwaH7zN7GoUv2Y2BUd4JqqCJEfJubGeuFoiy8/edit#

[The animation below shows our progress.]

[Kentaro Hara]

Thanks for the results, Minoru-san!

TL;DR is that 85% of renderer main thread tasks will run on AgentGroupScheduleror FrameScheduler managed task queues with ToT with MBI flag enabled.

This is amazing progress! I believe the task migration will contribute to make BFcache & Prerendering behave more correctly :)

If you can add UMA to track the metrics, it's awesome (though I'm not sure it's high priority).

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Kentaro Hara, Tokyo

[Dave Tapuska]

I haven't dived into the document too much just yet. Is there a comparison between desktop and mobile? I presume a bunch of extension work uses the inappropriate task runner and I'd expect desktop to be much higher than mobile. 

Dave

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[Minoru Chikamune]

> This is amazing progress!

Thanks :-)

> If you can add UMA to track the metrics, it's awesome (though I'm not sure it's high priority).

Yeah, this is also a good idea. But probably I guess this is not a high priority.

> Is there a comparison between desktop and mobile?

Oh, this is a good point. I took this data from my Linux desktop.

I'm also curious to see the difference between desktop and Android. Thanks!

[Kouhei Ueno]

Thank you so much for taking the numbers! This is amazing work!

On Fri, Feb 19, 2021 at 9:48 AM 'Minoru Chikamune' via Blink Isolation discussions <blink-iso...@chromium.org> wrote:

> This is amazing progress!

Thanks :-)

> If you can add UMA to track the metrics, it's awesome (though I'm not sure it's high priority).

Yeah, this is also a good idea. But probably I guess this is not a high priority.

I think we should do this, but probably after we've turned on all the flags by default.

 

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kouhei

[Minoru Chikamune]

> Is there a comparison between desktop and mobile?

FYI: I took the data from android, and updated the document below.

https://docs.google.com/document/d/1aE76rsDwaH7zN7GoUv2Y2BUd4JqqCJEfJubGeuFoiy8/edit#heading=h.aafalb4aejjk

<data comparison (animation)>

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