1543325 - 2.39 - 6.34% build times (windows2012-32-shippable, windows2012-64-shippable) regression on push 4bb96b9e1a3241c400b6fcdcd6ebf7e97fc5fcb9

Status: RESOLVED WORKSFORME

(Firefox Build System :: General, defect)

Description

[Ionuț Goldan [:igoldan]]

We have detected a build metrics regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=c8c67ca7b3d907c0a3c88fa40f07cccd281932c4&tochange=4bb96b9e1a3241c400b6fcdcd6ebf7e97fc5fcb9

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

Regressions:

6% build times windows2012-32-shippable opt nightly taskcluster-c5.4xlarge 4,636.97 -> 4,930.86
5% build times windows2012-32-shippable opt nightly taskcluster-c4.4xlarge 5,490.86 -> 5,780.75
2% build times windows2012-64-shippable opt nightly taskcluster-c4.4xlarge 6,091.57 -> 6,237.32

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=20372

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 jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Automated_Performance_Testing_and_Sheriffing/Build_Metrics

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

Comment 1

[Nathan Froyd [:froydnj]]

I think that's expected now that we're removing additional files during the PGO clobber step. mshal, do we have plans to transition Windows builds to 3-stage PGO so we could avoid this?

Comment 2

[Michael Shal [:mshal]]

(In reply to Nathan Froyd [:froydnj] from comment #1)

I think that's expected now that we're removing additional files during the PGO clobber step. mshal, do we have plans to transition Windows builds to 3-stage PGO so we could avoid this?

Redirecting to chmanchester, since he's planning to work on Windows PGO this quarter I believe.

Comment 3

[Chris Manchester (limited bugmail, email directly)]

Yes, I believe I'm planning to work on 3-tier Windows PGO this quarter.