Bug 204822 – Add network loading signposts

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKit2

[Ben Nham]

We should be able to optionally log network data task-related signposts to the os_signpost subsystem on the Mac. This allows us to visualize the network load waterfall in our various perf visualization tools. I've found this to be helpful in debugging networking-related perf issues (e.g. making sure that speculative revalidation/loading isn't double-loading resources, making sure that concurrent requests go out with the expected priority, etc.).

[Radar WebKit Bug Importer]

<rdar://problem/57608824>

[Ben Nham]

Created attachment 384770 [details]
Patch

[Ben Nham]

Comment on attachment 384770 [details]
Patch

Looks like I need to change my patch to handle compiling on High Sierra, which doesn't have os_signpost.

[Ben Nham]

Created attachment 384785 [details]
Patch

[Ben Nham]

Created attachment 384827 [details]
Patch

[Ben Nham]

Created attachment 385796 [details]
Patch

[Alex Christensen]

Comment on attachment 385796 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=385796&action=review

> Source/WebCore/PAL/pal/spi/cocoa/OSVariantSPI.h:2
> + * Copyright (C) 2014-2019 Apple Inc. All rights reserved.

No 2014

[Ben Nham]

Created attachment 385798 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 385798 [details]
Patch

Rejecting attachment 385798 [details] from commit-queue.

Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-03', 'build', '--no-clean', '--no-update', '--build-style=release', '--port=mac']" exit_code: 2 cwd: /Volumes/Data/EWS/WebKit

Last 5000 characters of output:
LS_SCRIPT -DENABLE_MEDIA_SOURCE -DENABLE_MEDIA_STREAM -DENABLE_MEMORY_SAMPLER -DENABLE_METER_ELEMENT -DENABLE_MOUSE_CURSOR_SCALE -DENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION -DENABLE_NOTIFICATIONS -DENABLE_PAYMENT_REQUEST -DENABLE_PDFKIT_PLUGIN -DENABLE_POINTER_EVENTS -DENABLE_POINTER_LOCK -DENABLE_PUBLIC_SUFFIX_LIST -DENABLE_REMOTE_INSPECTOR -DENABLE_RESIZE_OBSERVER -DENABLE_RESOURCE_LOAD_STATISTICS -DENABLE_RESOURCE_USAGE -DENABLE_RUBBER_BANDING -DENABLE_SANDBOX_EXTENSIONS -DENABLE_SERVER_PRECONNECT -DENABLE_SERVICE_CONTROLS -DENABLE_SERVICE_WORKER -DENABLE_SHAREABLE_RESOURCE -DENABLE_SPEECH_SYNTHESIS -DENABLE_STREAMS_API -DENABLE_SVG_FONTS -DENABLE_TELEPHONE_NUMBER_DETECTION -DENABLE_TEXT_AUTOSIZING -DENABLE_USERSELECT_ALL -DENABLE_USER_MESSAGE_HANDLERS -DENABLE_VARIATION_FONTS -DENABLE_VIDEO -DENABLE_VIDEO_PRESENTATION_MODE -DENABLE_VIDEO_TRACK -DENABLE_VIDEO_USES_ELEMENT_FULLSCREEN -DENABLE_WEBDRIVER_MOUSE_INTERACTIONS -DENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS -DENABLE_WEBGL -DENABLE_WEBGL2 -DENABLE_WEB_AUDIO -DENABLE_WEB_AUTHN -DENABLE_WEB_CRYPTO -DENABLE_WEB_RTC -DENABLE_WIRELESS_PLAYBACK_TARGET -DENABLE_XSLT -DHAVE_CORE_PREDICTION -DU_HIDE_DEPRECATED_API -DU_DISABLE_RENAMING=1 -DU_SHOW_CPLUSPLUS_API=0 -DFRAMEWORK_NAME=WebKit -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -mmacosx-version-min=10.13 -g -fvisibility=hidden -fvisibility-inlines-hidden -fno-threadsafe-statics -Wno-sign-conversion -Winfinite-recursion -Wmove -Wcomma -Wblock-capture-autoreleasing -Wstrict-prototypes -Wrange-loop-analysis -Wno-semicolon-before-method-body -iquote /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/WebKit-generated-files.hmap -I/Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/WebKit-own-target-headers.hmap -I/Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/WebKit-all-target-headers.hmap -iquote /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/WebKit-project-headers.hmap -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/include -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/usr/local/include -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/WebCore.framework/PrivateHeaders/ForwardingHeaders -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/DerivedSources/WebKit2 -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/usr/local/include/WebKitAdditions -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/local/include/WebKitAdditions -I/Volumes/Data/EWS/WebKit/WebKitBuild/Release/usr/local/include/webrtc -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/local/include/webrtc -I/Volumes/Data/EWS/WebKit/Source/WebKit -I/Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/DerivedSources/x86_64 -I/Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/DerivedSources -Wall -Wextra -Wcast-qual -Wchar-subscripts -Wextra-tokens -Wformat-security -Winit-self -Wmissing-format-attribute -Wmissing-noreturn -Wno-unused-parameter -Wpacked -Wpointer-arith -Wredundant-decls -Wundef -Wwrite-strings -Wexit-time-destructors -Wglobal-constructors -Wtautological-compare -Wimplicit-fallthrough -F/Volumes/Data/EWS/WebKit/WebKitBuild/Release -iframework /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/PrivateFrameworks -iframework /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks -iframework /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/PrivateFrameworks -isystem /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/System.framework/PrivateHeaders -include /Volumes/Data/EWS/WebKit/WebKitBuild/PrecompiledHeaders/WebKit2Prefix-hkfsfnjkkugpfjadznvwlaxomzqm/WebKit2Prefix.h -MMD -MT dependencies -MF /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/Objects-normal/x86_64/UnifiedSource7.d --serialize-diagnostics /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/Objects-normal/x86_64/UnifiedSource7.dia -c /Volumes/Data/EWS/WebKit/WebKitBuild/Release/DerivedSources/WebKit2/unified-sources/UnifiedSource7.cpp -o /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/Objects-normal/x86_64/UnifiedSource7.o

** BUILD FAILED **


The following build commands failed:
	CompileC /Volumes/Data/EWS/WebKit/WebKitBuild/WebKit.build/Release/WebKit.build/Objects-normal/x86_64/UnifiedSource4-mm.o /Volumes/Data/EWS/WebKit/WebKitBuild/Release/DerivedSources/WebKit2/unified-sources/UnifiedSource4-mm.mm normal x86_64 objective-c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)

Full output: https://webkit-queues.webkit.org/results/13292569

[Ben Nham]

Created attachment 385921 [details]
Patch

[Ben Nham]

Comment on attachment 385921 [details]
Patch

This patch does the availability check for os_signpost properly, which is necessary when (for instance) building for 10.13 with a 10.14 SDK.

[WebKit Commit Bot]

Comment on attachment 385921 [details]
Patch

Clearing flags on attachment: 385921

Committed r253702: <https://trac.webkit.org/changeset/253702>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.