1740413 - High frequency [tier2] bugs/1738700-1.html == bugs/1738700-1-ref.html | image comparison, max difference: 3, number of differing pixels: 1177

Status: RESOLVED FIXED

(Core :: Layout, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: abutkovits [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=357595845&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/eLxNM-1KR_S87ntoFvASHg/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/eLxNM-1KR_S87ntoFvASHg/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

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Comment 1

[Cosmin Sabou [:CosminS]]

Jonathan, this looks to be from Bug 1738700 https://hg.mozilla.org/integration/autoland/rev/3bd4e0246b821a1239b1c184b9e5bd8a99acbf25. Could you have a look over it? It's only android-hw-p2-8-0-android-aarch64-qr so far. Thank you.

Comment 2

[Jonathan Kew [:jfkthame]]

Looks like some Android systems show more antialiasing fuzz (sigh), though I see it's not entirely consistent. With a max-difference of 3, though, it's not really a concern; we can just annotate it accordingly.

Comment 3

[Jonathan Kew [:jfkthame]]

Attachment: Bug 1740413 - Adjust fuzz annotation for Android antialiasing variability. r?lsalzman

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1738700

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/7b18da1fbd9c
Adjust fuzz annotation for Android antialiasing variability. r=lsalzman

Comment 6

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/7b18da1fbd9c

Comment 7

[Intermittent Failures Robot]

26 failures in 649 pushes (0.04 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 22
• mozilla-central: 3
• try: 1

Platform and build breakdown:

• android-hw-p2-8-0-android-aarch64-qr: 24
  • opt: 15
  • debug: 9
• android-hw-p2-8-0-android-aarch64-shippable-qr: 2
  • opt: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1740413&startday=2021-11-10&endday=2021-11-10&tree=all

Comment 8

[Atila Butkovits]

This is still happening: https://treeherder.mozilla.org/logviewer?job_id=357735273&repo=autoland&lineNumber=1930

Jonathan, could you take a look?

Comment 9

[Jonathan Kew [:jfkthame]]

That shows a difference on 1328 pixels instead of 1177, though still only a max-difference of 3 (insignificant). Not sure why it's so variable between different test runs, as they're all "passing" in the sense that the behavior being tested is working correctly; there's just some kind of difference between the precise antialiasing that we see. (Do all these tests always run on identical systems, or are there hardware- or driver-level differences that might affect GPU rendering, I wonder?)

Anyhow, the answer here is simply to adjust the fuzz number.

Comment 10

[Jonathan Kew [:jfkthame]]

Attachment: Bug 1740413 - Adjust Android fuzz a bit more, for inconsistent antialiasing results. r?lsalzman

Comment 11

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1738700

Comment 12

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/54d201a9118a
Adjust Android fuzz a bit more, for inconsistent antialiasing results. r=lsalzman

Comment 13

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/54d201a9118a

Comment 14

[Intermittent Failures Robot]

35 failures in 2723 pushes (0.013 failures/push) were associated with this bug in the last 7 days.

This is the #18 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 29
• mozilla-central: 4
• try: 2

Platform and build breakdown:

• android-hw-p2-8-0-android-aarch64-qr: 32
  • opt: 16
  • debug: 16
• android-hw-p2-8-0-android-aarch64-shippable-qr: 3
  • opt: 3

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1740413&startday=2021-11-08&endday=2021-11-14&tree=all