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Engineering Meeting Details

  • Tuesday 2014-01-21 - 11:00 am Pacific Standard Time
  • Dial-in: Audio-only conference# 98411
    • People with Mozilla phones or softphones please dial x4000 Conf# 98411
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    • UK/London: +44 (0)207 855 3000, x4000 Conf# 98411
    • FR/Paris: +33 1 84 88 37 37, x4000 Conf# 98411
    • Gmail Chat (requires Flash and the Google Talk plugin): paste +1 650 903 0800 into the Gmail Chat box that doesn't look like it accepts phone numbers
    • SkypeOut is free if you use the 800 number
  • Engineering Vidyo Room / Air Mozilla / MTV Warp Core / TOR Finch / SFO Warfield / PDX Widmer
  • join #planning for back channel


Hot Bugs

(Important bugs for which we need to find owners or additional help. If known, please include suggested team or knowledge needed to advance the bug.)

Orange Factor

The Need To Know

(Release and system issues that may impact engineering this week.)

Notices/Schedule (akeybl/lsblakk/bajaj)

Next Merge: August 5, 2024 Next Release: August 6, 2024
Central: 130 Aurora: 54 Beta: 129 Release:
  1. REDIRECT Template:Version/Gecko/release/current
  • Close to wrapping up Firefox 27 with Firefox 27 Beta 8 for Desktop and mobile gone-to-build yesterday

29 bugs (34 bugs last week)
26 bugs (32 bugs last week)
Unresolved Aurora 54 Trackers (non-security, not tracked for Beta) Unresolved Beta 129 Trackers (non-security)

Build Changes (gps)

(Build changes of which engineers should be aware.)

RelEng (catlee)

(Repo, test, and other information for engineers from the release engineering team.)

  • bug 749421 FIXED - You can now upload various types of files from your test runs by copying files into MOZ_UPLOAD_DIR.
    • Most test jobs supported, look at log to see if MOZ_UPLOAD_DIR is being set.
    • Please file a bug for job types that aren't yet supported that you need.

Upcoming Outages/Upgrades

(System outages/upgrades and tree closures that impact engineering.)

Team Stand-ups

(In <2 mins, what did your team accomplish last week, on what is your team working on this week, and on what, if anything, is your team blocked? No questions during the stand-ups. All questions should be asked during the roundtable.)

Accessibility (dbolter)

<Read Only>

  • Firefox for Android continues to get love from the community.

Add-on SDK (dtownsend)

No update

App Tools (dtownsend)

No update

B2G Services (dougt)

Developer Tools (robcee)

  • Highlighter in Browser Toolbox

<Read Only>

  • Numerous orange fixes

37 bugs fixed

DOM (jst/overholt)

Firefox Desktop (gavin)

Firefox Metro (bbondy/jmathies/mbrubeck)

Firefox Mobile (mfinkle/blassey)

  • Fix uplifted up through Fx27 Beta bug 935676 - Flash doesn't work on 4.4 KitKat
  • Enough has landed in for the new sync in Fx29, QA is now testing. Latest landings include:
    • bug 951264 - COPPA support for Firefox Accounts on Android
    • bug 956581 - Make FxAccountGetStartedActivity an AuthenticatorActivity
    • bug 951304 - Follow-up: Look better on tablets; improve interstitial
    • bug 929066 - Handle skew in HAWK requests
  • Lots of second screen-related landings: bug 953381 - Add generic support for casting a video to a second screen service
  • bug 917896 Replaced progress spinner, page load time win
  • We're spinning up a start-up perf effort bug 959776 - [meta][project] Improve startup performance

Firefox OS Communications (scravag)

<Read Only>

Firefox OS Devices/Porting (mchen)

Firefox OS Media Apps (hema)

<Read Only>

  • 1.3 Bug Fixes
  • Started on prep work and proof-of-concept on a couple of 1.4 feature targets
  • Some folks from media team are in Taipei to discuss madai feature set

Firefox OS Media Recording (cjku)

<Read Only>

  • bug 959487 - [MediaEncoder] Crash at imageclient when using MediaEncoder
  • bug 926128 - reduce layer programs in use to 6, add colormatrix and blur support
  • bug 946245 - [Display][gonk-kk] Porting GonkDisplay, nativewindow and libui
  • bug 950317 - [emulator][mochitest] Setup eth0 IP address to NetworkManager for running PeerConnection mochitest cases

Firefox OS Performance (mlee)

<Read Only>

2014.01.17: Last Sprint

  • 1.3 blockers
  • Automation
    • Generate per-app memory consumption data for use in Datazilla to help with tarako memory goals.
    • Eideticker CI up and running in London office.
    • make test-perf now outputs to JSON file for better automation integration.
  • Memory
    • impactjs library's memory usage identified as cause of some OOM; working with author to release new more memory-performant version.
    • Gallery app OOM after editing photo fixed
    • "refcount logging" for blob URIs now implemented.

2014.01.31: Current Sprint

  • Tarako
    • Memory tracking and footprint improvements.
  • Automation
    • Performance test automation.
    • Scrollgraph improvements.
    • Investigate Datazilla launch latency perf results variability.
  • Power
    • Complete and ship remaining harnesses & ammeters.

Firefox OS Productivity (doliver)

<Read Only>

No update this week. The Productivity team is in Taipei for a meetup & planning for 1.4/1.5 releases.

Firefox OS Radio/Bluetooth/GPS (kenhkchang)

Firefox OS Systems - Front End (gwagner)

Firefox OS Systems - Platform (timdream)

GFX (milan)

  • Actively fixing remaining async pan-zoom issues (Vivien helping a lot here, fixing Gecko bugs as well, thanks!)
  • Investigating the performance regressions without tiling on Windows OMTC - we may not have a practical way out
  • Implementing the hardware fence support on trunk (the original implementation was Gecko 28/Firefox OS 1.3 specific)
  • Implementing will-change property
  • Cut the rope regression fixed
  • Ongoing Moz2D conversion work - getting help from Telenor/Comoyo
  • Flash regression with text fixed, will ask for uplift approval
  • Old DDB optimizations (Windows) were not - removing them

Identity (jedp)

JS (naveed)

<Read Only>

    • Compiler (JIT)
      • (bug 952891 - Implemented in-C++ pic for optimizing for-of over arrays. Needs changes to play well with GC.
    • Garbage Collection
      • (bug 753203 - Exact Rooting has landed for Desktop!
      • (bug 753203 - Fixed possible linux virtual address fragmentation by updating part of jemalloc
    • Front End and Other
      • (bug 958726 - Uplifted to Aurora, Beta, and b2g26 to potentially reduce crash rates. Rejected from ESR24

Layout (jet/dbaron)

No update. Servo team is having a work week in SF.

Media (mreavy)

<Read Only>

  • TURN TCP is being selected when it shouldn't be (randomly). This can hurt call delay. We're actively working to fix this ASAP. Note: TURN TCP is only in 28 & 29
    • Fixed bug 960296 which caused video to freeze and not recover when using TURN TCP. We're nominating it for uplift to Aurora (28)
  • Landed support for about:webrtc and ICE debugging panel there; more stats coming
  • WebRTC (audio-only) will be in B2G 1.3. Currently running emulator mochitests by hand once a day until a bug in the framework for the emulator is fixed.
  • About to land update of libyuv and will be moving it to media/libyuv to enable non-webrtc use (bug 880419 and bug 813645)

Necko (dougt/jduell)

<Read Only>

  • Speculative network connections: database now works well enough (no longer gobbles too much CPU and disk space) that we expect to keep it preff'd on in aurora/beta/release (bug 945779, bug 947745, bug 948448)

Performance (vladan)

<Read Only>

Seceng (mmc)

No updates.

Shumway (mbx)

<Read Only>

WebAPI (overholt)

  • No updates

Quality Programs

(An opportunity to hear about status with the various quality programs that do not have a formal team structure.)

CritSmash (dbolter)

MemShrink (njn)

  • Nathan Froyd reduced the size of 32-bit libxul by ~220KB by packing JSJitInfo structs more carefully. This is the latest in a number of recent optimizations he's done to static code and data size, which are welcome because that's an area that doesn't get much attention.

OrangeFactor (ryanvm)

  • Past week's OrangeFactor: 8.32 (Previous Week: 11.12).
    • Metro mochitest shutdown timeouts still #1 non-infra issue, progress being made finding cause.
  • Concerns over general slowdown of mochitest-bc test suite. Many recent intermittents have been "fixed" by increasing the timeout for the test, but root problem appears to be tests that normally run in short intervals randomly taking much longer (2-3x, if not more). Some sort of bad GC behavior?
    • Linux debug mochitest-bc now takes 140-150 min to run, similar for OSX 10.6 debug. Debug takes 100+ minutes on all platforms.
    • Filed bug 962156 for investigating.
  • 19 intermittent failures fixed in the last week - List - Thanks!.

Stability (kairo/bsmedberg)

  • Overall numbers look OK, but desktop beta is still higher in crash rates for 27 than for 26, and Nightly is significantly bad (see below).
  • bug 962141 is JS crash spike starting with 2014-01-17 Nightly builds - overall crash rates are up to 2-3x of what they are usually.


(Comments and questions that arise during the course of the meeting or otherwise do not have a section.)

<Read only beyond this point>

Friends of the Tree

There were great changes by volunteers in Core and Toolkit during the past week. Thanks to all of these contributors for their passion and hard work, and say hi to new contributors kcarchana77, and Art Rothstein! Here are some highlights:

Mailing List Threads

(Threads that are likely to be of interest to engineering from various mailing lists.)

Good Reads

(Links to blog posts, books, videos, etc. that you think will be of interest to others.)

irc #planning Log From This Meeting

13:58 lmandel:
13:58 KaiRo: bsmedberg: yup
13:59 bsmedberg: KaiRo: I'll talk about it, then. I think we should back out the whole lot unless there's a fix today.
13:59 kbrosnan: re-center mtv camera
14:00 KaiRo: bsmedberg: well, if the regression testing from Alice points in the right direction, we might have a single bug landing that might be it
14:00 lmandel: KaiRo, bsmedberg: stability update today?
14:00 bsmedberg: KaiRo: which bug is this? I don't see data in bug 962141
14:00 firebot: Bug nor, --, ---, nobody, NEW, JS crash spike starting with 2014-01-17 Nightly builds
14:01 KaiRo: bsmedberg: see
14:01 firebot: Bug 961466 cri, --, ---, nobody, NEW, crash in js::GCMarker::processMarkStackTop(js::SliceBudget&) on
14:01 KaiRo: I pointed to that bug in the other one
14:01 KaiRo: lmandel: we have something today, yes
14:01 KaiRo: lmandel: bsmedberg will do it
14:02 kbrosnan: not so nice for the tv
14:04 bajaj: elan:
14:04 bajaj: check the mobile section
14:05 blassey: totally breaking the "no questions" rule
14:06 lmandel: blassey: questions are cool for releng
14:06 elan: bajaj: thank you. you're pointing to the crash stats for android?
14:06 robcee: should qualify: *some* browser chrome.
14:06 bajaj: elan: yep
14:06 catlee-mtg: there's a no questions rule?
14:07 mschifer: questions are at the end
14:07 lmandel: catlee-mtg: No questions during team standups
14:07 lmandel: or, as mschifer said, save your questions for the end.
14:07 elan: yes, it looks like we're inching the right direction, now
14:08 mfinkle: robcee, *some* ?
14:08 mschifer: of course, questions asked in irc don't count.
14:08 catlee-mtg: :)
14:09 mfinkle: blassey,
14:09 mfinkle: ~3secs
14:09 robcee: mfinkle: doesn't work for anonymous nodes, i.e., you can't inspect into a <button> element to see the image or text elements.
14:09 mfinkle: robcee, seems sane
14:09 robcee: but works well for lots of high-level xul stuff
14:09 robcee: and we'll get into the xbl components soonish, I think
14:09 blassey: mfinkle: as I said, embarrassing
14:10 blassey: though I think the embarrassment belongs to google, not us
14:10 mfinkle: blassey, i feel some of it