Method HandleDxgkSyncDPC

PresentData/PresentMonTraceConsumer.cpp:681–702

The VSyncDPC/HSyncDPC contains a field telling us what flipped to screen. This is the way to track completion of a fullscreen present.

// The VSyncDPC/HSyncDPC contains a field telling us what flipped to screen.
// This is the way to track completion of a fullscreen present.
void PMTraceConsumer::HandleDxgkSyncDPC(uint64_t timestamp, uint32_t submitSequence)
{
    auto pEvent = FindPresentBySubmitSequence(submitSequence);
    if (pEvent != nullptr) {

        VerboseTraceBeforeModifyingPresent(pEvent.get());
        SetScreenTime(pEvent, timestamp);

        // For Hardware_Legacy_Flip, we are done tracking the present.  If we
        // aren't expecting a subsequent *SyncMultiPlaneDPC_Info event, then we
        // complete the present now.
        //
        // If we are expecting a subsequent *SyncMultiPlaneDPC_Info event, then
        // we wait for it to complete the present.  This is because there are
        // rare cases where there may be multiple in-flight presents with the
        // same submit sequence and waiting ensures that both the VSyncDPC and
        // *SyncMultiPlaneDPC events match to the same present.
        if (pEvent->PresentMode == PresentMode::Hardware_Legacy_Flip && !pEvent->WaitForMPOFlipEvent) {
            CompletePresent(pEvent);
        }
    }
}

// These events are emitted during submission of all types of windowed presents
// while DWM is on and gives us a token we can use to match with the