TPEPerformance/Meetings/2016-08-08

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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: 1.99
   2. KR: 0.3 nightly startup crashes per 100 ADI (per-month median)
      • Current: 0.86
   3. KR: 2.0 nightly content crashes per 100 ADI (per-month median)
      • Current: 8.33
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: no metric

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

kanru

• Uptime 0801 nightly triage
• bug 1291535 NEW:: Crash in xpc::NativeGlobal
  • Looking at bug 1291535
• bug 907096 NEW:: crash in nsInterfaceRequestorAgg::GetInterface(nsID const&, void**) via mozilla::psm::TransportSecurityInfo::GetInterface
  • Looking at bug 907096

wcpan

• bug 1265324 REOPENED:: [e10s] Typing is garbled after backspacing
  • Bug 1265324 - cannot reproduce

gregweng

• Found a way to trigger bailout manually: adding `debugger` in the client code; need to find a solution to add in parsed code for GDocs
• Sent the bailout build to QA. They will measure the impact for me.

ting

• Checked 0731 nightly crashes
• bug 1145613 NEW:: Crash in [@ ReleaseData ] & [@ ReleaseData(void*, unsigned int)]
  • Bug 1145613 am still checking nsTArray
  • Bug 1145613 checked coverity, nsCString, nsACString, nsAString_internal, nsACString_internal constructors, but still found nothing suspecious
  • Bug 1145613 checked few more crashes with different signatures, but still clueless
• bug 965936 NEW:: [meta] Virtual address space fragmentation
  • Bug 965936 created a script to download nightly crash dumps and output the fragmentation info

cervantes

• bug 1145613 NEW:: Crash in [@ ReleaseData ] & [@ ReleaseData(void*, unsigned int)]
  • Commented bug 1145613
• bug 1241436 RESOLVED::FIXED User shouldn't be able to enter email address if the "email me when more info is available" option is unchecked in the tab crash reporter
  • Landed bug 1241436
• bug 1286802 NEW:: Add some heap areas to the minidump
  • Bug 1286802 - revising the patch
  • Bug 1286802 - working on the memory allocation in exception context: use HeapAlloc API
• bug 1284674 RESOLVED::FIXED Can we remove Nuwa?
  • Reviewed bug 1284674
• bug 1253575 NEW:: crash in mozalloc_abort | NS_DebugBreak | mozilla::ipc::GeckoChildProcessHost::OpenPrivilegedHandle
  • Landed bug 1253575
• bug 1266440 RESOLVED::FIXED Remove crash annotation IPCExtraSystemError once bug 1258317 is fixed
  • Landed bug 1266440

thinker

• I have found content of script tags would be run before following content of the document arrive. It means CSS and other resources would not be handled for blocking by a long run script in a script tag. Interruptible script runner maybe helpful.

This Week Priorities

kanru

• Structured Clone (reduce OOM)
• Crash components
• MOZ_MUST_USE
• JS stack in crash report

thinker

• Network, focus on load resource earlier
• Improve task tracer (scriptable interface)
• idea: randomly insert guard pages

cervantes

• Study heap memory in minidump, experiment with previous crashes
• idea: guard pages for jemalloc arena
• e10s media crash, possibley gmp related

wcpan

• More MOZ_MUST_USE
• Fix Coverity discovered bugs

ting

• Fragmentation. Experiment on previous crash to see the virtual memory layout
• RelaseData() crash

gweng

• JavaScript GC slowness on GDoc
• Wait bailout result from QA

Incoming

• Sep: Many team members plan to take PTOs for the Mid-Autumn Festival.