1713418 - Demo at https://testdrive-archive.azurewebsites.net/Performance/Chalkboard/Default.html uses 400% of CPU for a minute at a time

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Mayank Bansal]

enable WR
go to https://testdrive-archive.azurewebsites.net/Performance/Chalkboard/Default.html and click to start the demo

ER: fast demo, like a few weeks back
AR: Full CPU use for minute at a time

Not sure how real world this demo is, or if this regression will be fixed once the deferred SVG work is complete. Feel free to INVALID.

Comment 1

[Mayank Bansal]

2021-05-29T10:06:04.406000: INFO : Narrowed integration regression window from [59039e0d, 783b7ceb] (3 builds) to [59039e0d, 6b763366] (2 builds) (~1 steps left)
2021-05-29T10:06:04.423000: DEBUG : Starting merge handling...
2021-05-29T10:06:04.423000: DEBUG : Using url: https://hg.mozilla.org/integration/autoland/json-pushes?changeset=6b7633663e927b2eca489c68d34f97cd6a019398&full=1
2021-05-29T10:06:04.424000: DEBUG : redo: attempt 1/3
2021-05-29T10:06:04.424000: DEBUG : redo: retry: calling _default_get with args: ('https://hg.mozilla.org/integration/autoland/json-pushes?changeset=6b7633663e927b2eca489c68d34f97cd6a019398&full=1',), kwargs: {}, attempt #1
2021-05-29T10:06:04.431000: DEBUG : urllib3.connectionpool: Resetting dropped connection: hg.mozilla.org
2021-05-29T10:06:06.448000: DEBUG : urllib3.connectionpool: https://hg.mozilla.org:443 "GET /integration/autoland/json-pushes?changeset=6b7633663e927b2eca489c68d34f97cd6a019398&full=1 HTTP/1.1" 200 None
2021-05-29T10:06:06.511000: DEBUG : Found commit message:
Bug 1704792 - Part 7. Integrate use of ImageIntRegion with WebRender display lists. r=jrmuizel

This patch hooks up the ImageIntRegion to the blob recording and makes
any necessary adjusts to the display list creation to take advantage of
it.

Differential Revision: https://phabricator.services.mozilla.com/D114986

2021-05-29T10:06:06.511000: DEBUG : Did not find a branch, checking all integration branches
2021-05-29T10:06:06.511000: INFO : The bisection is done.
2021-05-29T10:06:06.511000: INFO : Stopped

Comment 2

[Mayank Bansal]

Attachment: aboutsupport

Comment 3

[Mayank Bansal]

https://share.firefox.dev/3vDA552

Comment 4

[Robert Longson [:longsonr]]

does bug 1713350 improve things?

Comment 5

[Mayank Bansal]

as of https://hg.mozilla.org/mozilla-central/rev/1514fcbf80a014f6e3b96d8815f53a9b4ebd3303 , I can still repro this bug

Comment 6

[Miko Mynttinen]

Fixed by bug 1713651.