1553410 - 52.86% raptor-scn-power-idle-geckoview-power (android-hw-g5-7-0-arm7-api-16) regression on push 74c8824ac224b33b6617c9c3b54f08eb944be2a4 (Sat May 18 2019)

Status: RESOLVED WONTFIX

(Testing :: Raptor, defect, P1)

Description

[Ionuț Goldan [:igoldan]]

Raptor has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=74c8824ac224b33b6617c9c3b54f08eb944be2a4

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

Regressions:

53% raptor-scn-power-idle-geckoview-power android-hw-g5-7-0-arm7-api-16 pgo 57.66 -> 88.14

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=20999

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 Raptor jobs in a pushlog format.

To learn more about the regressing test(s) or reproducing them, please see: https://wiki.mozilla.org/Performance_sheriffing/Raptor

*** 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/Performance_sheriffing/Talos/RegressionBugsHandling

Comment 1

[Ionuț Goldan [:igoldan]]

Greg, was this extra consumption expected?

Comment 2

[Greg Mierzwinski [:sparky]]

Yes, this increase was expected as the screen brightness on the reference phones for power tests has been increased to (or standardized to) 50%. The brightness level before this patch was unknown.