1003155 - Firefox 31 memory usage increase since April 27th

Status: RESOLVED FIXED

(Mozilla QA Graveyard :: Mozmill Tests, defect)

Description

[Ioana (away)]

Both explicit and resident memory usage increased for Firefox 31 with 9 to 15MB starting with April 27th.

Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=0e91262606a6&tochange=c67a79064fd4

Reports: http://mozmill-daily.blargon7.com/#/endurance/reports?app=All&branch=31.0&platform=All&from=2014-04-26&to=2014-04-27

Notes:
1. This happens on all the platforms.
2. Not reproducible on Firefox 29 and 30.
3. I am currently investigating this issue locally and will update the bug as soon as I have more details.

Comment 2

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Ioana, have you made progress on the investigation? It would be good if we can get a closer range, preferable on inbound for that regression.

Comment 3

[Mihaela Velimiroviciu (:mihaelav)]

I'll take this over

Comment 4

[Mihaela Velimiroviciu (:mihaelav)]

The memory regression was caused by https://hg.mozilla.org/integration/mozilla-inbound/rev/483210d830f0.

Endurance results:
* with 483210d830f0: 
Explicit memory (MB): 	Minimum: 97 / Maximum: 240 / Average: 142
Resident memory (MB): 	Minimum: 221 / Maximum: 404 / Average: 292
http://mozmill-crowd.blargon7.com/#/endurance/report/ca725ca957252135fc72c3c08f3af8c0

* with the last inbound build before 483210d830f0:
Explicit memory (MB): 	Minimum: 92 / Maximum: 197 / Average: 128
Resident memory (MB): 	Minimum: 221 / Maximum: 352 / Average: 280
http://mozmill-crowd.blargon7.com/#/endurance/report/ca725ca957252135fc72c3c08f535e99

This was backed out from Firefox 31 (Aurora) on the 5th of May in bug 984537 for memory regressions.
Our endurance tests show the decrease in the memory consumption since the 6th of May.

Marking as FIXED (by the backout: https://bugzilla.mozilla.org/show_bug.cgi?id=984537#c28)

Comment 5

[u279076]

Great work, Mihaela! Looks like a new fix has landed on mozilla-central and they're seeking approval for mozilla-aurora uplift. Can you confirm this hasn't re-regressed on Nightly?

Comment 6

[Mihaela Velimiroviciu (:mihaelav)]

(In reply to Anthony Hughes, QA Mentor (:ashughes) from comment #5)
> Great work, Mihaela! Looks like a new fix has landed on mozilla-central and
> they're seeking approval for mozilla-aurora uplift. Can you confirm this
> hasn't re-regressed on Nightly?

The memory consumption did not increase onNightly, nor on Aurora

Comment 7

[u279076]

Marking verified based on comment 6. Thanks for your help, Mihaela.