ChangeLog

2020-11-11  Wenson Hsieh  <wenson_hsieh@apple.com>

        Add system trace points for the GPU process display list processing loop

        https://bugs.webkit.org/show_bug.cgi?id=218824

        Reviewed by NOBODY (OOPS!).

        * wtf/SystemTracing.h:

2020-11-10  Yusuke Suzuki  <ysuzuki@apple.com>

        Unreviewed, reverting r269403

Source/WebKit/ChangeLog

2020-11-11  Wenson Hsieh  <wenson_hsieh@apple.com>

        Add system trace points for the GPU process display list processing loop

        https://bugs.webkit.org/show_bug.cgi?id=218824

        Reviewed by NOBODY (OOPS!).

        Capture the time spent applying display list items in the GPU process with a pair of new trace points, to aid

        performance debugging and analysis.

        * GPUProcess/graphics/RemoteRenderingBackend.cpp:

        (WebKit::RemoteRenderingBackend::wakeUpAndApplyDisplayList):

2020-11-11  Wenson Hsieh  <wenson_hsieh@apple.com>

        [Concurrent display lists] Add an initial implementation of concurrent display list rendering

Source/WTF/wtf/SystemTracing.h

@@enum TracePointCode {

    ProcessLaunchEnd,

    InitializeSandboxStart,

    InitializeSandboxEnd,

    GPUProcessRange = 16000,

    WakeUpAndApplyDisplayListStart,

    WakeUpAndApplyDisplayListEnd,

};

#ifdef __cplusplus

Source/WebKit/GPUProcess/graphics/RemoteRenderingBackend.cpp

#include "RemoteRenderingBackendMessages.h"

#include "RemoteRenderingBackendProxyMessages.h"

#include <wtf/CheckedArithmetic.h>

37#include <wtf/SystemTracing.h>

namespace WebKit {

using namespace WebCore;

@@void RemoteRenderingBackend::applyDisplayListsFromHandle(ImageBuffer& destinatio

void RemoteRenderingBackend::wakeUpAndApplyDisplayList(DisplayList::ItemBufferIdentifier initialIdentifier, uint64_t initialOffset, RenderingResourceIdentifier destinationBufferIdentifier)

{

173 TraceScope tracingScope(WakeUpAndApplyDisplayListStart, WakeUpAndApplyDisplayListEnd);

    auto imageBuffer = m_remoteResourceCache.cachedImageBuffer(destinationBufferIdentifier);

    if (UNLIKELY(!imageBuffer)) {

        // FIXME: Add a message check to terminate the web process.

Tools/ChangeLog

2020-11-11  Wenson Hsieh  <wenson_hsieh@apple.com>

        Add system trace points for the GPU process display list processing loop

        https://bugs.webkit.org/show_bug.cgi?id=218824

        Reviewed by NOBODY (OOPS!).

        * Tracing/SystemTracePoints.plist:

2020-11-10  Noam Rosenthal  <noam@webkit.org>

        Unreviewed, cleanup my watchlist entries.

Tools/Tracing/SystemTracePoints.plist

                 <key>CodeEnd</key>

                 <string>14006</string>

             </dict>

             <dict>

                 <key>Name</key>

                 <string>Wake up and apply display list</string>

                 <key>Type</key>

                 <string>Interval</string>

                 <key>Component</key>

                 <string>47</string>

                 <key>CodeBegin</key>

                 <string>16001</string>

                 <key>CodeEnd</key>

                 <string>16002</string>

             </dict>

         </array>

     </dict>

 </array>