1297496 - User in e10s cohort reporting 30-60s lag when switching between tabs

Status: RESOLVED INCOMPLETE

(Core :: General, defect, P3)

Description

[[:philipp]]

we got a report from a user on 48 that switching between tabs (webmail was given as example) is taking up to a minute's time and they are probably seeing a spinning circle as they described the site was "reloading": https://support.mozilla.org/en-US/questions/1135499

==========

troubleshooting information from about:support is as follows:

Name: Firefox
Version: 48.0
Build ID: 20160726073904
Update Channel: release
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
OS: Windows_NT 6.1 x86
Multiprocess Windows: 1/1 (Enabled by default)
Safe Mode: false

Crash Reports for the Last 3 Days

All Crash Reports (including 2 pending crashes in the given time range)

Extensions

Name: Firefox Hello Beta
Version: 1.4.4
Enabled: true
ID: [e-mail]

Name: Multi-process staged rollout
Version: 1.1
Enabled: true
ID: [e-mail]

Name: Pocket
Version: 1.0.4
Enabled: true
ID: [e-mail]

Name: Bing Search
Version: 1.0.0.2
Enabled: false
ID: [e-mail]

Graphics

Features
Compositing: Direct3D 11
Asynchronous Pan/Zoom: wheel input enabled
WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 7520G Direct3D11 vs_5_0 ps_5_0)
Hardware H264 Decoding: Yes; Using D3D9 API
Direct2D: true
DirectWrite: true (6.2.9200.17568)
GPU #1
Active: Yes
Description: AMD Radeon HD 7520G
Vendor ID: 0x1002
Device ID: 0x9990
Driver Version: 8.941.1.0
Driver Date: 2-9-2012
Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Subsys ID: 1849103c
RAM: 512

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo



Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 1
browser.download.importedFromSqlite: true
browser.download.manager.alertOnEXEOpen: true
browser.places.smartBookmarksVersion: 8
browser.sessionstore.upgradeBackup.latestBuildID: 20160726073904
browser.startup.homepage: about:home
browser.startup.homepage_override.buildID: 20160726073904
browser.startup.homepage_override.mstone: 48.0
browser.tabs.remote.autostart.2: true
browser.urlbar.daysBeforeHidingSuggestionsPrompt: 0
browser.urlbar.lastSuggestionsPromptDate: 20160809
dom.apps.reset-permissions: true
dom.mozApps.used: true
dom.push.userAgentID: 2f5c82285a574132bfae9a2942e96ab3
extensions.lastAppVersion: 48.0
font.internaluseonly.changed: false
gfx.crash-guard.d3d11layers.appVersion: 48.0
gfx.crash-guard.d3d11layers.deviceID: 0x9990
gfx.crash-guard.d3d11layers.driverVersion: 8.941.1.0
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.glcontext.gfx.driver-init.direct3d11-angle: true
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle: true
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-d3d11: false
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-warp: false
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-try-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
gfx.crash-guard.status.d3d9video: 2
gfx.crash-guard.status.glcontext: 2
gfx.direct3d.last_used_feature_level_idx: 0
gfx.driver-init.appVersion: 42.0
gfx.driver-init.deviceID: 0x9990
gfx.driver-init.driverVersion: 8.941.1.0
gfx.driver-init.feature-d2d: true
gfx.driver-init.feature-d3d11: true
gfx.driver-init.status: 2
keyword.URL: http://www.bing.com/search?FORM=SL5ADF&PC=SL5A&q=
media.benchmark.vp9.fps: 72
media.benchmark.vp9.versioncheck: 1
media.gmp-eme-adobe.abi: x86-msvc-x64
media.gmp-eme-adobe.lastUpdate: 1461812617
media.gmp-eme-adobe.version: 17
media.gmp-gmpopenh264.abi: x86-msvc-x64
media.gmp-gmpopenh264.lastUpdate: 1471531296
media.gmp-gmpopenh264.version: 1.6
media.gmp-manager.buildID: 20160726073904
media.gmp-manager.lastCheck: 1471619100
media.gmp-widevinecdm.abi: x86-msvc-x64
media.gmp-widevinecdm.lastUpdate: 1465568899
media.gmp-widevinecdm.version: 1.4.8.866
media.gmp.storage.version.observed: 1
media.hardware-video-decoding.failed: false
media.webrtc.debug.aec_log_dir: C:\Users\Brian\AppData\Local\Temp
media.webrtc.debug.log_file: C:\Users\Brian\AppData\Local\Temp\WebRTC.log
media.youtube-ua.override.to: 43
network.auth.allow-subresource-auth: 2
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1471467080
places.history.expiration.transient_current_max_pages: 93333
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
print.printer_HP_Deskjet_F4200_series.print_bgcolor: false
print.printer_HP_Deskjet_F4200_series.print_bgimages: false
print.printer_HP_Deskjet_F4200_series.print_duplex: -437918235
print.printer_HP_Deskjet_F4200_series.print_edge_bottom: 0
print.printer_HP_Deskjet_F4200_series.print_edge_left: 0
print.printer_HP_Deskjet_F4200_series.print_edge_right: 0
print.printer_HP_Deskjet_F4200_series.print_edge_top: 0
print.printer_HP_Deskjet_F4200_series.print_evenpages: true
print.printer_HP_Deskjet_F4200_series.print_footercenter:
print.printer_HP_Deskjet_F4200_series.print_footerleft: &PT
print.printer_HP_Deskjet_F4200_series.print_footerright: &D
print.printer_HP_Deskjet_F4200_series.print_headercenter:
print.printer_HP_Deskjet_F4200_series.print_headerleft: &T
print.printer_HP_Deskjet_F4200_series.print_headerright: &U
print.printer_HP_Deskjet_F4200_series.print_in_color: true
print.printer_HP_Deskjet_F4200_series.print_margin_bottom: 0.5
print.printer_HP_Deskjet_F4200_series.print_margin_left: 0.5
print.printer_HP_Deskjet_F4200_series.print_margin_right: 0.5
print.printer_HP_Deskjet_F4200_series.print_margin_top: 0.5
print.printer_HP_Deskjet_F4200_series.print_oddpages: true
print.printer_HP_Deskjet_F4200_series.print_orientation: 0
print.printer_HP_Deskjet_F4200_series.print_page_delay: 50
print.printer_HP_Deskjet_F4200_series.print_paper_data: 1
print.printer_HP_Deskjet_F4200_series.print_paper_height: -1.00
print.printer_HP_Deskjet_F4200_series.print_paper_name:
print.printer_HP_Deskjet_F4200_series.print_paper_size_type: 0
print.printer_HP_Deskjet_F4200_series.print_paper_size_unit: 0
print.printer_HP_Deskjet_F4200_series.print_paper_width: -1.00
print.printer_HP_Deskjet_F4200_series.print_resolution: 600
print.printer_HP_Deskjet_F4200_series.print_reversed: false
print.printer_HP_Deskjet_F4200_series.print_scaling: 1.00
print.printer_HP_Deskjet_F4200_series.print_shrink_to_fit: true
print.printer_HP_Deskjet_F4200_series.print_to_file: false
print.printer_HP_Deskjet_F4200_series.print_unwriteable_margin_bottom: 0
print.printer_HP_Deskjet_F4200_series.print_unwriteable_margin_left: 0
print.printer_HP_Deskjet_F4200_series.print_unwriteable_margin_right: 0
print.printer_HP_Deskjet_F4200_series.print_unwriteable_margin_top: 0
privacy.sanitize.migrateClearSavedPwdsOnExit: true
privacy.sanitize.migrateFx3Prefs: true
services.sync.declinedEngines: forms,history,passwords,prefs,tabs,addons
services.sync.engine.addons: false
services.sync.engine.history: false
services.sync.engine.passwords: false
services.sync.engine.prefs: false
services.sync.engine.tabs: false
services.sync.lastPing: 1471549766
services.sync.lastSync: Fri Aug 19 2016 15:41:14 GMT-0400 (Eastern Standard Time)
services.sync.numClients: 1
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1470234247

Important Locked Preferences

JavaScript

Incremental GC: true

Accessibility

Activated: false
Prevent Accessibility: 0

Library Versions

NSPR
Expected minimum version: 4.12
Version in use: 4.12

NSS
Expected minimum version: 3.24 Basic ECC
Version in use: 3.24 Basic ECC

NSSSMIME
Expected minimum version: 3.24 Basic ECC
Version in use: 3.24 Basic ECC

NSSSSL
Expected minimum version: 3.24 Basic ECC
Version in use: 3.24 Basic ECC

NSSUTIL
Expected minimum version: 3.24
Version in use: 3.24

Experimental Features

Comment 1

[Liz Henry (:lizzard) (relman/hg->git project)]

I'm not sure how we can replicate this but maybe the about:support can give some clue to why this is happening. Flagging this for e10s triage.

Comment 2

[[:philipp]]

what kind of information should we try to gather from affected users to help diagnose the issue?

Comment 3

[[:philipp]]

the user at https://support.mozilla.org/questions/1137339 describes similar symptoms.

Comment 4

[Jim Mathies [:jimm]]

about:support text is a good place to start.

Comment 5

[Jim Mathies [:jimm]]

(In reply to [:philipp] from comment #3)
> the user at https://support.mozilla.org/questions/1137339 describes similar
> symptoms.

this is filed under bug 1300411