我正在寻找一个外部应用程序来监视 DirectX 应用程序的“FPS”（例如没有记录的 FRAPS）。我已经阅读了几篇关于性能测量工具的 Microsoft 文章- 但我希望获得社区的反馈（和经验）。
我的问题：获取 DirectX 应用程序的 FPS 的最佳方法是什么？
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2 回答
5
Windows 为与 DirectX 分析相关的 Windows 提供程序提供了一些事件跟踪。最有趣的是Microsoft-Windows-D3D9和Microsoft-Windows-DXGI，它允许跟踪帧呈现事件。计算 FPS 的最简单方法是计算某个时间间隔内 PresentStart 事件的数量，然后除以该时间间隔的长度。
要在 C# 中使用 ETW，请安装Microsoft.Diagnostics.Tracing.TraceEvent包。
以下代码示例显示正在运行的进程的 FPS：
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Threading;
using Microsoft.Diagnostics.Tracing.Session;
namespace ConsoleApp1
{
//helper class to store frame timestamps
public class TimestampCollection
{
const int MAXNUM = 1000;
public string Name { get; set; }
List<long> timestamps = new List<long>(MAXNUM + 1);
object sync = new object();
//add value to the collection
public void Add(long timestamp)
{
lock (sync)
{
timestamps.Add(timestamp);
if (timestamps.Count > MAXNUM) timestamps.RemoveAt(0);
}
}
//get the number of timestamps withing interval
public int QueryCount(long from, long to)
{
int c = 0;
lock (sync)
{
foreach (var ts in timestamps)
{
if (ts >= from && ts <= to) c++;
}
}
return c;
}
}
class Program
{
//event codes (https://github.com/GameTechDev/PresentMon/blob/40ee99f437bc1061a27a2fc16a8993ee8ce4ebb5/PresentData/PresentMonTraceConsumer.cpp)
public const int EventID_D3D9PresentStart = 1;
public const int EventID_DxgiPresentStart = 42;
//ETW provider codes
public static readonly Guid DXGI_provider = Guid.Parse("{CA11C036-0102-4A2D-A6AD-F03CFED5D3C9}");
public static readonly Guid D3D9_provider = Guid.Parse("{783ACA0A-790E-4D7F-8451-AA850511C6B9}");
static TraceEventSession m_EtwSession;
static Dictionary<int, TimestampCollection> frames = new Dictionary<int, TimestampCollection>();
static Stopwatch watch = null;
static object sync = new object();
static void EtwThreadProc()
{
//start tracing
m_EtwSession.Source.Process();
}
static void OutputThreadProc()
{
//console output loop
while (true)
{
long t1, t2;
long dt = 2000;
Console.Clear();
Console.WriteLine(DateTime.Now.ToString() + "." + DateTime.Now.Millisecond.ToString());
Console.WriteLine();
lock (sync)
{
t2 = watch.ElapsedMilliseconds;
t1 = t2 - dt;
foreach (var x in frames.Values)
{
Console.Write(x.Name + ": ");
//get the number of frames
int count = x.QueryCount(t1, t2);
//calculate FPS
Console.WriteLine("{0} FPS", (double)count / dt * 1000.0);
}
}
Console.WriteLine();
Console.WriteLine("Press any key to stop tracing...");
Thread.Sleep(1000);
}
}
public static void Main(string[] argv)
{
//create ETW session and register providers
m_EtwSession = new TraceEventSession("mysess");
m_EtwSession.StopOnDispose = true;
m_EtwSession.EnableProvider("Microsoft-Windows-D3D9");
m_EtwSession.EnableProvider("Microsoft-Windows-DXGI");
//handle event
m_EtwSession.Source.AllEvents += data =>
{
//filter out frame presentation events
if (((int)data.ID == EventID_D3D9PresentStart && data.ProviderGuid == D3D9_provider) ||
((int)data.ID == EventID_DxgiPresentStart && data.ProviderGuid == DXGI_provider))
{
int pid = data.ProcessID;
long t;
lock (sync)
{
t = watch.ElapsedMilliseconds;
//if process is not yet in Dictionary, add it
if (!frames.ContainsKey(pid))
{
frames[pid] = new TimestampCollection();
string name = "";
var proc = Process.GetProcessById(pid);
if (proc != null)
{
using (proc)
{
name = proc.ProcessName;
}
}
else name = pid.ToString();
frames[pid].Name = name;
}
//store frame timestamp in collection
frames[pid].Add(t);
}
}
};
watch = new Stopwatch();
watch.Start();
Thread thETW = new Thread(EtwThreadProc);
thETW.IsBackground = true;
thETW.Start();
Thread thOutput = new Thread(OutputThreadProc);
thOutput.IsBackground = true;
thOutput.Start();
Console.ReadKey();
m_EtwSession.Dispose();
}
}
}
基于PresentMon项目的源代码。
于 2019-02-11T07:43:56.900 回答
2
Fraps 将一个 DLL 插入到每个正在运行的应用程序中，并挂钩特定的 DX 调用以计算帧速率和捕获视频，很确定您将不得不做类似的事情。经过一番摸索后，我发现了一个 Github 项目，它可以进行一些基本的 DX 挂钩以进行捕获和叠加，因此这可能是一个很好的起点。虽然我没有亲自使用过，所以我不能完全保证质量。
于 2013-09-12T15:22:41.290 回答