FrameDataView.GetMarkerId

参数

返回

int Returns marker identifier as integer. Returns invalidMarkerId if there is no such marker in the capture.

描述

Get Profiler marker identifier for a specific name.

Use marker identifier to avoid string allocations when traversing Profiler data.

The Profiler uses a unique identifier for each marker it creates during a profiling session. The markers can generate many samples which HierarchyFrameDataView and RawFrameDataView can access.
All samples that the same marker generates have the same integer marker identifier and the same name.

标记标识符在整个性能分析会话期间保持。

using System;
using Unity.Collections;
using UnityEditor.Profiling;
using UnityEditorInternal;
using UnityEngine;
using UnityEngine.Profiling;

public class Example
{
    public static long GetGCAllocs(int frameIndex)
    {
        long totalGcAllocSize = 0;

        int gcAllocMarkerId = FrameDataView.invalidMarkerId;

        for (int threadIndex = 0;; ++threadIndex)
        {
            using (RawFrameDataView frameData = ProfilerDriver.GetRawFrameDataView(frameIndex, threadIndex))
            {
                if (!frameData.valid)
                    break;

                if (gcAllocMarkerId == FrameDataView.invalidMarkerId)
                {
                    gcAllocMarkerId = frameData.GetMarkerId("GC.Alloc");
                    if (gcAllocMarkerId == FrameDataView.invalidMarkerId)
                        break;
                }

                int sampleCount = frameData.sampleCount;
                for (int i = 0; i < sampleCount; ++i)
                {
                    if (gcAllocMarkerId != frameData.GetSampleMarkerId(i))
                        continue;

                    long gcAllocSize = frameData.GetSampleMetadataAsLong(i, 0);
                    totalGcAllocSize += gcAllocSize;
                }
            }
        }

        return totalGcAllocSize;
    }
}

See Also: GetMarkerName, HierarchyFrameDataView.GetItemMarkerID, RawFrameDataView.GetSampleMarkerId.