1600003 - 2.45% displaylist_mutate (linux64-shippable) regression on push b73b86efe266cba006e14a3b181508ab960ee805 (Thu November 6 2019)

Status: RESOLVED INVALID

(Core :: Graphics: Layers, defect)

Description

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=b73b86efe266cba006e14a3b181508ab960ee805

As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

2% displaylist_mutate linux64-shippable opt e10s stylo 1,489.64 -> 1,526.13

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=24003

On the page above you can see an alert for each affected platform as well as a link to a graph showing the history of scores for this test. There is also a link to a treeherder page showing the Talos jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://wiki.mozilla.org/TestEngineering/Performance/Talos

For information on reproducing and debugging the regression, either on try or locally, see: https://wiki.mozilla.org/TestEngineering/Performance/Talos/Running

*** Please let us know your plans within 3 business days, or the offending patch(es) will be backed out! ***

Our wiki page outlines the common responses and expectations: https://wiki.mozilla.org/TestEngineering/Performance/Talos/RegressionBugsHandling

Comment 1

[Barret Rennie [:barret] (they/them)]

The push you linked to was backed out. Is it supposed to be associated with the later push, https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=8e822bb904b1a2a4846c51ecbae38335aec268ec ?

Additionally, the code paths introduced in this push should not be running at all in this test.

Comment 2

[Aria Beingessner [:Gankra]]

Based on barret's comments I'm going to close this as spurious