How to use QUIC Performance Diagnostics?

[WANDOKING]

I want to create an echo server, client using System.Net.Quic in .NET 9.0 to test QUIC network performance.

I noticed that Performance Monitor has counters related to QUIC, and I tried to measure them in the following form, but I can't seem to get the right values.

For example, when I run the following code on my machine, it always outputs most of the values as 0.

The same thing happens in my C program using msquic.lib, I am unable to collect the values of the counters correctly.

Any idea why this is happening?

My computer is Windows 11 23H2 (AMD64).

Translated with DeepL.com (free version)

using System.Diagnostics;
using System.Net.Quic;

namespace CSharpTest;

[System.Diagnostics.CodeAnalysis.SuppressMessage("Interoperability", "CA1416")]
public static class QuicPerformanceCollector
{
    private static List<PerformanceCounter> counters = new List<PerformanceCounter>();

    public static void Initialize()
    {
        const string QuicCategoryName = "QUIC Performance Diagnostics";

        if (PerformanceCounterCategory.Exists(QuicCategoryName) is false)
        {
            throw new InvalidOperationException($"Performance counter category '{QuicCategoryName}' not exists.");
        }

        List<string> quicPerformanceCounterNames = new List<string>
        {
            "QUIC App Received Bytes/sec",
            "QUIC App Sent Bytes/sec",
            "QUIC Connection Operations Completed/sec",
            "QUIC Connection Operations Queued/sec",
            "QUIC Connections Active",
            "QUIC Connections Connected",
            "QUIC Connections Created",
            "QUIC Connections Created/sec",
            "QUIC Connections No ALPNs/sec",
        };

        foreach (string counterName in quicPerformanceCounterNames)
        {
            if (PerformanceCounterCategory.CounterExists(counterName, QuicCategoryName) is false)
            {
                throw new InvalidOperationException($"Performance counter '{counterName}' not exists.");
            }

            counters.Add(new PerformanceCounter(QuicCategoryName, counterName, true));
        }

        Thread collectThread = new Thread(CollectThreadAction);
        collectThread.Start();
    }

    private static void CollectThreadAction()
    {
        while (true)
        {
            foreach (var counter in counters)
            {
                Console.WriteLine($"{counter.CounterName,-40}: {counter.NextValue()}");
            }

            Console.WriteLine();
            Thread.Sleep(1000);
        }
    }
}

internal class Program
{
    private static void Main(string[] args)
    {
        QuicPerformanceCollector.Initialize();
        Thread.Sleep(Timeout.Infinite);
    }
}

QUIC App Received Bytes/sec             : 0
QUIC App Sent Bytes/sec                 : 0
QUIC Connection Operations Completed/sec: 0
QUIC Connection Operations Queued/sec   : 0
QUIC Connections Active                 : 0
QUIC Connections Connected              : 0
QUIC Connections Created                : 6
QUIC Connections Created/sec            : 0
QUIC Connections No ALPNs/sec           : 0

[nibanks]

The perf counters in Windows are only for the kernel mode version of MsQuic that comes in box (used by http and smb). It's not used for user mode MsQuic, such as the one used by .Net. but we do have an MsQuic API that allows you to query the stats for your process. Please see our diagnostics documentation for more details.