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Engineering Meeting Details

  • Tuesday 2013-07-16 - 11:00 am Pacific
  • Dial-in: Audio-only conference# 98411
    • People with Mozilla phones or softphones please dial x4000 Conf# 98411
    • US/Toll-free: +1 800 707 2533, (pin 4000) Conf# 98411
    • US/California/Mountain View: +1 650 903 0800, x4000 Conf# 98411
    • US/California/San Francisco: +1 415 762 5700, x4000 Conf# 98411
    • US/Oregon/Portland: +1 971 544 8000, x4000 Conf# 98411
    • CA/British Columbia/Vancouver: +1 778 785 1540, x4000 Conf# 98411
    • CA/Ontario/Toronto: +1 416 848 3114, x4000 Conf# 98411
    • 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 / Warp Core / SFO-Boardroom / Tor Commons
  • join #planning for back channel


  • lmandel to speak with Brendan Dahl about a PDF.js update for next week

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
  • [ted] bug 874647 - Find and fix the underlying cause of the Windows XP xpcshell hangs -- need some platform help
    • lmandel will follow up with froydnj/taras
  • [jsmith] bug 892963 - crash in nsTimerImpl::PostTimerEvent - currently causing our gaia ui automation to run into a lot of trouble running reliably on mozilla central + gaia master builds, as it causes an OS restart crash (95% chance of hitting it)
    • bsmedberg will take this one

The Need To Know

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

  • Firefox 23b6 Desktop shipping today, mobile tomorrow

Notices/Schedule (akeybl/lsblakk/bajaj)

52 bugs (46 bugs last week)
48 bugs (48 bugs last week)
Unresolved Aurora 54 Trackers (non-security, not tracked for Beta) Unresolved Beta 128 Trackers (non-security)

Build Changes (gps)

(Build changes of which engineers should be aware.) <Read Only>

Upcoming Outages/Upgrades

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

Key Issues

(Non team specific issues that impact engineering.)

PDF.js update (bdahl)


  • In since FF19
  • Decline in issues reported
  • Majority of common features in spec implemented

Short Term Goals (FF25)

  • Incremental rendering
  • OpenType font support
  • Memory usage

Longer Term

  • Basic form/javascript support
  • Performance - Image decoders with asm.js
  • Soft masks

Platform Wishlist

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>

Add-on SDK (dtownsend)

App Tools (dtownsend)

B2G Services (dougt)

<Read Only>

  • Push notification is under patent disclosure from Nokia. W3C start a PAG to research this.

Developer Tools (dcamp)

DOM (jst/dougt)

<Read Only>

Firefox Desktop (gavin/dolske)

<Read Only>

This week's Australis update. Still working on perf regression blockers.

Firefox Metro (bbondy/jmathies/mbrubeck)

<Read Only>

  • strong iteration completed IT10.
  • nice front end perf gains. bug 893015, bug 872780
  • Win8 style overlay scrollbars enabled.
  • front end polish.

Firefox Mobile (mfinkle/blassey)

  • SkiaGL is super close to landing, wrangling tests
  • We are converging on Dynamic URL Bar for Fx23, lot's of landings and testing of the landings late last week bug 890006, bug 877602, bug 886576. We are good from a security standpoint for this feature per deveditz,mgoodwin (thanks!).
  • First stab at Gecko View documentation available:
  • In review:bug 857730 - Implement Contacts API for Android
  • Need to converge WebRTC for beta, Privacy Policy review tomorrow
  • Looking at making PiCL prototypes for Auth and Storage

Firefox OS Browser (blassey)

<Read Only> In London planning our first sprint.

Firefox OS Communications (scravag)

<Read Only> bug 887455 Firefox OS 1.2 Communication features

  • Finishing up Sprint 1 this week. Will have Demo and Retropsect meetings.
  • Sprint 2 planning next week
  • v1.2 Features
    • MOZ owned
      • Conf call - UX getting ready - Gecko getting ready - next major Gaia dev work for Sprint 2?
      • FDN - waiting for UX (UX to be done towards end of Sprint 1) - next Major Gaia dev work for Sprint 2?
      • Make last call (via BT) - working already, need UX/Eng confirmation
      • Bouncing effect on incoming call - UX working on it - devs to pick up in Sprint 2?
    • TEF owned
      • Contacts import and dedupe - not done yet (Major work) - devs to pick up for Sprint 2?
      • Make last call - Almost done
      • Silent SMS - being worked on - Continue in Sprint 2?
      • Contact export (USIM/SD/BT) - UX is being worked on. Dev to pick up for Sprint 2?
      • Supplementary services - to be picked for through out all Sprints?
    • For QA, great job done with moztrap in Sprint 1. Those without Moztrap seems to be for Sprint 2?

Firefox OS Devices/Porting/Bluetooth (mchen)

  • Last Week
    • 1.1 Blocker Bugs
    • Gonk-JB Porting
      • bug 892210 - Bluetooth on Bluedroid backend.
        • Pairing function is basically workable.
      • bug 890144 - Emulating SD Card on Nexus 4.
        • AutoMounter Part - Review+. Others - Reviewing
      • bug 878108 - Support hardware decoding on gonk-JB (Transfer to CAF member)
      • bug 871364 - Support camera on gonk-JB (Android 4.2) (Transfer to CAF member)
    • Nexus 4 for reference phone
      • Find out a way to adjust memory/framebuffer/cpu cores/cpu frequency/gpu frequency for emulating from low to high end device.
    • Helix Device
      • To support the engineering mode issues. (Media/RIL Test)
      • bug 888841
      • Setup intranet Wiki page for announcing image release & download process.
    • N970 Device
      • Camera preview is not working based on m-c.
    • Bluetooth v1.2 features
  • This Week
    • 1.1 Blocker Bugs
    • Gonk-JB Porting
    • Helix Device
    • Bluetooth v1.2 features
  • Blockers
    • None

Firefox OS Media Apps (hema)

<Read Only>

  • Last Week
    • 1.1 Bugs - 890394, 887968, 889233, 889167, 876782, 886897, 885753, 891445, 882683, 882692, 871364, 857674, 889739
    • Started looking into 1.2 Music Icon Status/Music Controls on Lockscreen
  • This Week
    • 1.1 Bugs
    • 1.2 Music Related User Stories
  • Blockers
    • None

Firefox OS Media Recording (cjku)

Last week

  • Media Recorder
    • bug 879668 [MediaEncoder] Implement MediaOmxEncoder on B2G
  • WebAudio
    • bug 882171 - Optimize the AudioNodeEngine.cpp routines for NEON
    • bug 885496 - Optimize KissFFT with NEON instructions
  • WebRTC
    • no update
  • Canvas 2D/SkiaGL
    • No update
  • HW Composer
  • Memory Shrinking
    • no update
  • IME(OOP for 1.2)
    • bug 847763 - Prevent virtual keyboard iframe from getting focus
    • bug 845169 - Target events "properly" at overlapping app frames
    • bug 811636 - Parent process does not handle the situation correctly if its child process is failed at launching
  • Web Animations
    • Spec study

This week

  • Media Recorder
    • {{bug|879668} [MediaEncoder] Implement MediaOmxEncoder on B2G
    • Compare functionality difference between "mozCamera" and "MediaRecording + ImageCapture"
  • WebRTC
    • Keep fixing E10S and SDP issues.
    • Enable HW codec on B2G
  • Graphic
    • bug 893300 - Co-work with graphic team to fix new architecture issues.
  • Web Animations
    • Spec study

Firefox OS Performance (mlee)

Firefox OS Productivity (doliver)

Last week:

  • Team meetup in Vancouver to discuss dev process and features for v1.2

This week:

  • Most of team is focused v1.1 blockers
    • 871897, 887698, 889284 - should land this week
    • 887700, 891641, 838843 - investigation underway
  • Some work beginning for v1.2


Firefox OS Radio/GPS (kenhkchang)

  • Last week
    • Fix Leo+ issues, bug 885280, bug 890218, bug 887745, bug 890180, bug 875484, and bug 886765.
    • CDMA
      • Call waiting/switching -[bug 822210], discuss the design in Gaia part.
      • RSSI - [bug 835237](gecko part), add relative signal information for CDMA/Evdo.
      • OTASP - [bug 882983], to get the more detail information from QC.
      • nsIDOMMozMobileCellInfo - [bug 882984], have provided a patch and wait for review.
      • Network Mode - [bug 881862], Gaia dev. is implemeting.
      • ECB Mode -
        • [bug 881863](Gaia part), to get the more detail information from QC.
        • [bug 887690](Gecko part), implementing.
    • Bluetooth - move to mchen's team.
    • WAP Push(SI and SL)
      • [bug 891249]Add fixed MSISDN sender number. - should we support multiple MSISDN numbers for this feature?
      • [bug 887157]Add Enable and Disable function. - We want to know if the function is only for WAP Push.
    • OMA CP - have to be able to configure following items.
      • Modem, it should be owned by modem partner.
      • APN settings - MMS and Browser.
      • Voicemail settings, to get more detail information.
      • Other voice related configuration, to get more detail information.
    • NFC
      • Study NFC code of what DT provide.
      • To study the BT secure paring protocol for NFC.
    • WPA-EAP
  • This week
    • Fix Leo+ issues, bug 885280, bug 888821, bug 887745, bug 891756, and bug 886765.
    • CDMA - need to have UX, otherwise, it's impossible to start Gaia works.
      • Call waiting/switching -[bug 822210](Gecko part), implementing.
      • RSSI - [bug 835237](Gecko part), implementing.
      • OTASP - [bug 882983], to get the more detail information from QC.
      • nsIDOMMozMobileCellInfo - [bug 882984](Gecko part), implementing.
      • Network Mode - [bug 881862], reviewing.
      • ECB Mode -
        • [bug 881863](Gaia part), to get the more detail information from QC.
        • [bug 887690](Gecko part), implementing.
    • WAP Push(SI and SL) - try to get the answer for following questions from PM.
      • [bug 891249]Add fixed MSISDN sender number. - should we support multiple MSISDN numbers for this feature?
      • [bug 887157]Add Enable and Disable function. - We want to know if the function is only for WAP Push.
    • OMA CP - to get the CP file format of partner.
    • NFC
      • Study NFC codes.
      • To discuss the NFC architecture.
    • WPA-EAP

Firefox OS Systems - Front End (lucas)

Firefox OS Systems - Platform (timdream)

  • Wrapping up most of the Gaia v1.1.0hd work. Still waiting on some graphics assets delivery, will check-in one-by-one when getting them.
  • v1.2 3rd-party keyboard planning is nearly complete
  • Some other feature discussion is on going too

GFX (milan)

Identity (jedp)

  • Persona auth in RTC Peer Connection
    • IdP proxy module: bug 878941
    • Persona PR in review
    • Ryan Seys (eng intern) and Ryan Feely (designer) working on a beautiful demo app
  • Sign-in to device
    • Still in UX and product
    • Account management on device might be able to use Inter-App Communication API (bug 876397)

JS (naveed)

<Read Only>

     7/23 Jan De Mooij will provide the JS update here
     7/30 Terrence Cole will provide the JS update here
  • Last Week
    • Compiler (JIT)
      • bug 892931: Perf bug preventing fast Ion -> Baseline calls in some cases
      • bug 864400: Optimize ModI for non-constant power-of-2 divisors
      • bug 881988: PJS: Support calling native functions that have parallelized alternatives
    • Garbage Collection
      • bug 888338: Working on post barriering the browser for GGC
    • Front End and Other
      • bug 885758: Add ExclusiveContext class for off main thread contexts with exclusive access to their compartment
      • bug 860923: [meta] "use asm" should not affect code speed
      • bug 892097: LifoAlloc: Reduce freeAllIfHuge bound on B2G
      • bug 891209: Parse "detectably simple" expressions quickly. Speeds up some cases by 1.1x.
      • Touch support for Emscripten SDL
      • Resolved OdinMonkey FFI calls issue
  • This Week
    • Compiler (JIT)
      • bug 888900: Weird Windows-only clipboard regression
    • Garbage Collection
      • bug 869263: Fix oranges, why having an empty virtual function cause oranges on try?
    • Front End and Other
      • bug 893552: OdinMonkey: (ARM) dynamic code is not preserving float registers d8 to d15 as required by the ABI.
  • Blockers
    • None

Layout (jet/dbaron)

<Read Only>

  • notable fixes past 2 weeks
    • re-enabled word cache expiration timers in bug 889365, will see if crashes come back
    • events go to children of button elements (bug 843003)
    • page-break-inside:avoid works inside the 'height' of blocks with less content than height (bug 883676)

Media (mreavy)

<Read Only>

  • Landed a major update of the import since last week. No known regressions. If you experience any problems, please file a bug and ping Randell (jesup on irc)
  • Close to landing the patch on bug 825112, which is blocking B2G audio work and media recording
  • Close to landing the fix for bad audio latency/drift seen with 44100Hz mics, bug 886886. Hoping to uplift this to Aurora and Beta.

Necko (jduell)

  • HTTP/2 support for node.js: compression almost done.
  • Off-main-thread OnDataAvailable has landed on m-c and stuck (HTML parser is now using it)
    • working on adding support for image processing thread too
  • Landed fix that avoids silly network delays on Samsung Android devices (bug 888268)
  • Discovered we can save 40-50ms in some cases by calling async proxy APIs synchronously (bug 887995)
    • others may want to do similar optimizations
  • Fixed edge case where sites with DNS that resolve to multiple hosts (some of which don't respond) can cause lots of orphaned CLOSE_WAIT sockets (bug 878792)
  • HTTP cache rewrite: after some optimizations (preferring read I/O to writes) performance is >= mozilla-central for most operations.

Performance (vladan)


  • Performance team had its monthly planning meeting
  • bug 891360: SessionStore I/O moved to a dedicated worker
  • bug 892355: Elfhack (build tool that optimizes relocations in compiled libraries) has been re-enabled for Fennec
  • bug 888899: Allow fast iterations of the refresh driver on OS X
  • bug 894128: Avi has started a project to identify causes of un-smooth scrolling in Firefox (on Windows desktop)

In progress:

  • Making SessionStore async & improving its performance
  • Improve Breakpad unwind performance for CFI/EXIDX
  • Replace Addon Manager SQLITE with JSON file
  • Reducing startup time to first paint
  • Talos tab animation test

Blog posts:

Seceng (sstamm)

WebAPI (overholt)

  • work week in Toronto last week
    • getting closer to final design on FileSystem API
    • decided to gather telemetry data for appcache before proceeding with spot fixes or rewrite of existing implementation (bug 892486)
    • plan for NavigationController
    • how necko and gecko can work better together (mcmanus)
    • background workers discussion a bit inconclusive but nsm is going to write up a prototype of his push stuff using a worker like API in a sandbox and run that on the main thread to start experimenting (~social browsing)
    • APIs on workers

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)

MemShrink progress, week 105--108.

jlebar fixed a bunch of leaks caused by processes getting killed in b2g:
   "nothing" is unpatched, other lines are with one of the issues patched

OrangeFactor (ryanvm)

  • Past week's OrangeFactor: 3.75 (Previous Week: 4.00).
  • 21 intermittent failures fixed in the last week - List - Thanks!.

Stability (kairo/bsmedberg)

  • Overall numbers look pretty good, with the exception of Android trunk, but the bugs there are all owned.
  • Working with FxOS partners to get symbols for release builds without proprietary data
  • Working on making an encryption system available for the proprietary symbols also
  • Stability Work Week is August 19-23 in MV.


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

<Read only beyond this point>

Mailing List Threads

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

Shutting off leak tests

Good Reads

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