[Webkit-unassigned] [Bug 244986] REGRESSION(251311 at main-251315@main): [ iOS Debug wk2 ] compositing/hidpi-non-simple-compositing-layer-with-fractional-size-and-background.html is a near constant timeout

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=244986

--- Comment #6 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
The actual paints don't take long. Most of the GPU process time is in:

Sample Count, Samples %, Normalized CPU %, Symbol
12965, 89.3%, 3.5%, IPC::StreamServerConnection::dispatchStreamMessages(unsigned long) (in WebKit)
12402, 85.4%, 3.4%,     IPC::StreamServerConnection::dispatchStreamMessage(IPC::Decoder&&, IPC::StreamMessageReceiver&) (in WebKit)
11831, 81.5%, 3.2%,         WebKit::RemoteRenderingBackend::didReceiveStreamMessage(IPC::StreamServerConnection&, IPC::Decoder&) (in WebKit)
8143, 56.1%, 2.2%,             void IPC::handleMessage<Messages::RemoteRenderingBackend::MarkSurfacesVolatile, WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)>(IPC::Connection&, IPC::Decoder&, WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)) (in WebKit)
8138, 56.1%, 2.2%,                 void IPC::callMemberFunction<WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >, std::__1::integer_sequence<unsigned long, 0ul, 1ul> >(std::__1::tuple<WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >&&, WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)) (in WebKit)
8138, 56.1%, 2.2%,                     void IPC::callMemberFunctionImpl<WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >, 0ul, 1ul>(WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul>) (in WebKit)
8138, 56.1%, 2.2%,                         WebKit::RemoteRenderingBackend::markSurfacesVolatile(WTF::ObjectIdentifier<WebKit::MarkSurfacesAsVolatileRequestIdentifierType>, WTF::Vector<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&) (in WebKit)
7390, 50.9%, 2.0%,                             WebKit::RemoteResourceCache::cachedImageBuffer(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >) const (in WebKit)
7390, 50.9%, 2.0%,                                 WebKit::QualifiedResourceHeap::getImageBuffer(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >) const (in WebKit)
7390, 50.9%, 2.0%,                                     WebCore::ImageBuffer* WebKit::QualifiedResourceHeap::get<WebCore::ImageBuffer>(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >) const (in WebKit)
7341, 50.6%, 2.0%,                                         WebKit::QualifiedResourceHeap::checkInvariants() const (in WebKit)
3863, 26.6%, 1.0%,                                             WTF::HashTableConstIteratorAdapter<WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> >, WTF::Ref<WebCore::DecomposedGlyphs, WTF::RawPtrTraits<WebCore::DecomposedGlyphs> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> >, WTF::Ref<WebCore::DecomposedGlyphs, WTF::RawPtrTraits<WebCore::DecomposedGlyphs> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> >, WTF::Ref<WebCore::DecomposedGlyphs, WTF::RawPtrTraits<WebCore::DecomposedGlyphs> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> >, WTF::Ref<WebCore::DecomposedGlyphs, WTF::RawPtrTraits<WebCore::DecomposedGlyphs> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> >, WTF::Ref<WebCore::DecomposedGlyphs, WTF::RawPtrTraits<WebCore::DecomposedGlyphs> > > > >::operator++() (in WebKit)

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