TPEPerformance/Meetings/2016-08-15

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OKR confidence

1. O: Make Firefox more stable [current crash rates]
   1. KR: 1.2 nightly browser crashes per 100 ADI (per-month median)
      • Current: 2.46
   2. KR: 0.3 nightly startup crashes per 100 ADI (per-month median)
      • Current: 0.81
   3. KR: 2.0 nightly content crashes per 100 ADI (per-month median)
      • Current: 14.38
2. O: Make crashes easier to find & fix
   1. KR: 90% new crashes have associated bugs opened and tracked
      • Current: no metric
3. O: Improve Google document performance on Firefox
   1. O: Understand Google document performance issues on Firefox
      1. KR: Reduced the problem space to a finite areas that we can improve
         • Current: GC slowness, Inline script blocking content

Health Checks

1. Test code coverage (minus crash/no return code path)
   • N/A
2. Team mental health
   • Good
3. ADI / DAU / MAU
   • N/A

Previous Week

This report is automatically generated by https://github.com/kanru/standups_weekly

thinker

• Previous commitment:
  • [x] Network, focus on load resource earlier
  • [ ] Improve task tracer (scriptable interface)
• Content.sink.enable_perf_mode=1 looks more responsiveness.
• NsHtml5TreeOpExecutor would suspend current parsing and resume it later if it run too long.
• Speculative loading has a great potential to improve gdoc startup time. I am looking into it, and observe its behavior.
• XHR::open would be blocked to create an actor in sync. It should be improved. Greg would study how much time it costs.
• bug 1269690 NEW:: [Perf][google docs] 45.25%(4528ms) slower than Chrome when opening 1 page table content
  • Vsync seems to affect multiple 10%s of time for gdoc table case. bug 1269690

cervantes

• Previous commitment:
  • [x] Study heap memory in minidump, experiment with previous crashes
  • [x] e10s media crash, possibley gmp related
• Tracing GMP threading code
• bug 1279612 NEW:: Near permafailing mda tests on Win7 debug on beta in test_webvtt_disabled.html | application crashed [@ mozalloc_abort(char const * const)]
  • Commented the finding to bug 1279612
• bug 1286802 NEW:: Add some heap areas to the minidump
  • Bug 1286802 - testing the patch and comparing with the MiniDumpWithIndirectlyReferencedMemory type of minidump
  • Bug 1286802 - testing the patch with previously fixed crashes

wcpan

• Previous commitment:
  • [x] More MOZ_MUST_USE
  • [ ] Fix Coverity discovered bugs
• bug 1293212 NEW:: Use MOZ_MUST_USE in uriloader/
  • Bug 1293212 - review request
• bug 1046166 NEW:: [e10s] userContent.css does not work
  • Bug 1046166 - review granted

ting

• Previous commitment:
  • [x] Fragmentation. Experiment on previous crash to see the virtual memory layout
  • [x] RelaseData() crash
• Checked 0807 nightly crashes
• bug 1292781 NEW:: [e10s] Treeherder scroll position back to the top after loading new results if HWA was disabled
  • Am investigating bug 1292781
• bug 965936 NEW:: [meta] Virtual address space fragmentation
  • Bug 965936 found mozjemalloc still has 1M default chunk size, bug 1202523 was for jemalloc, fixed the script
  • Bug 965936 posted what i've found for a oom-small so far
• bug 1145613 NEW:: Crash in [@ ReleaseData ] & [@ ReleaseData(void*, unsigned int)]
  • Filed bug 1293501 for adding debug annotations to track down bug 1145613
• bug 1202523 RESOLVED::FIXED Use the default chunk size with jemalloc 4
  • Bug 965936 found mozjemalloc still has 1M default chunk size, bug 1202523 was for jemalloc, fixed the script
• bug 1293577 RESOLVED::FIXED Crash in mozilla::image::Decoder::HasProgress
  • Read minidumps of bug 1293577 and bug 1293569
• bug 1293569 Invalid bug or security bug
  • Read minidumps of bug 1293577 and bug 1293569
• bug 1293501 NEW:: Add debug annotation/code for the crash in ReleaseData()
  • Bug 1293501 submitted a path for adding annotations for the nsHttpHeaderArray
  • Filed bug 1293501 for adding debug annotations to track down bug 1145613

kanru

• Previous commitment:
  • [x] Structured Clone (reduce OOM)
  • [ ] Crash components
  • [ ] MOZ_MUST_USE
  • [ ] JS stack in crash report
• bug 1292892 RESOLVED::FIXED Stop using JSRuntime outside SpiderMonkey
  • Review patch for bug 1292892

gweng

• Previous commitment:
  • [ ] JavaScript GC slowness on GDoc
  • [ ] Wait bailout result from QA

This Week Priorities

kanru

• Structured Clone (reduce OOM)
• Crash components
• MOZ_MUST_USE
• JS stack in crash report
• Establish graphic of crash rates and MAUs
• Predict script running time and run rendering before run script, ask support

thinker

• Sort task tracer patch to a bug.
• Work on gfx rendering bugs
• Gdoc, classify tasks into needed and un-needed tasks

cervantes

• Heap in minidump bug
• GMP shutdown crash
• Explore jemalloc, app verifier, etc

wcpan

• MOZ_MUST_USE
• Coverity bugs

ting

• Memory Fragmentation
• ReleaseData

gweng

• Check bailout test results
• External (inline) scrippt tuning
• JS timeout, executation deadline

Incoming

• Sep: Many team members plan to take PTOs for the Mid-Autumn Festival
• Nov: WebSummit/CodeSummit