1490787 - 5.5% displaylist_mutate (windows10-64-qr) regression on push 5bfe272aa1a2e80b562e245b48346e9c5aa4acee (Tue Sep 11 2018)

Status: VERIFIED FIXED

(Core :: Graphics: WebRender, defect, P2)

Description

[Joel Maher ( :jmaher ) (UTC -8)]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?changeset=5bfe272aa1a2e80b562e245b48346e9c5aa4acee

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

Regressions:

  6%  displaylist_mutate windows10-64-qr opt e10s stylo     7,576.58 -> 7,993.47


You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=15805

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/Buildbot/Talos/Tests

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

Comment 1

[Joel Maher ( :jmaher ) (UTC -8)]

Jeff, I see you updated web render, can you look into this regression?

Comment 2

[Andrew Osmond [:aosmond] (he/him)]

This improved on September 13th to be better than before the regression, although we are still well behind the non qr build.

Comment 3

[Joel Maher ( :jmaher ) (UTC -8)]

:aosmond- can we mark this as resolved?

Comment 4

[Joel Maher ( :jmaher ) (UTC -8)]

can we resolve this now that the regression is gone?

Comment 5

[Jeff Muizelaar [:jrmuizel]]

Sure.