Method RegisterHwQueueContext

PresentData/GpuTrace.cpp:141–178

HwQueue's are similar to Contexts, but are used with HWS nodes and use the following pattern: Context_Start hContext=C hDevice=D NodeOrdinal=N HwQueue_Start hContext=C hHwQueue=0x0 ParentDxgHwQueue=Q1 HwQueue_Start hContext=C hHwQueue=H1 ParentDxgHwQueue=Q2 HwQueue_Start hContext=C hHwQueue=H2 ParentDxgHwQueue=Q3 ... DxgKrnl_QueuePacket_Start hContext=Q2 SubmitSequence=S ... ... DxgKrnl_QueuePac

//     HwQueue_Stop hContext=C hHwQueue=0x0 ParentDxgHwQueue=Q1
//     Context_Stop hContext=C
void GpuTrace::RegisterHwQueueContext(uint64_t hContext, uint64_t parentDxgHwQueue)
{
    DebugAssert(mContexts.find(hContext)         != mContexts.end());
    DebugAssert(mContexts.find(parentDxgHwQueue) == mContexts.end());

    // Look up the context C, which we're calling the parent context.  We
    // should already have seen a Context_Start event.
    auto ii = mContexts.find(hContext);
    if (ii == mContexts.end()) {
        return;
    }
    auto parentContext = &ii->second;

    DebugAssert(parentContext->mParentContext == 0);
    DebugAssert(parentContext->mIsHwQueue == false);
    parentContext->mIsParentContext = true;

    // Create a new context for the HWQueue.  Even though they map the same
    // device engine, HWQueues need their own context so that tracked sequence
    // IDs are ordered.
    //
    // If there are two HwQueues that map to the same engine, it's not clear
    // whether or not queue packets running at the same time are really running
    // simultaneous, but since we're counting any duration where at least one
    // node is running it doesn't matter.

    Node* node = new Node();
    node->mQueueIndex = 0;
    node->mQueueCount = 0;
    node->mIsVideo = parentContext->mNode->mIsVideo;

    auto hwQueueContext = &mContexts.emplace(parentDxgHwQueue, Context()).first->second;
    hwQueueContext->mPacketTrace = parentContext->mPacketTrace;
    hwQueueContext->mNode = node;
    hwQueueContext->mParentContext = hContext;
    hwQueueContext->mIsParentContext = false;
    hwQueueContext->mIsHwQueue = true;
}

void GpuTrace::UnregisterContext(uint64_t hContext)
{