接收到的字节总是返回 0

Question

我正在尝试使用 C# PerformanceCounter class 来 return 系统指标。

// Initialisation
// Threads (total threads for all processes)
PerformanceCounter performThreads = new System.Diagnostics.PerformanceCounter();
((ISupportInitialize)(performThreads)).BeginInit();
performThreads.CategoryName = "System";
performThreads.CounterName = "Threads";
((ISupportInitialize)(performThreads)).EndInit();

// Bytes received (cumulative total bytes received over all open socket connections)
private PerformanceCounter m_pcSys_BytesSent;
PerformanceCounter performBytesR = new System.Diagnostics.PerformanceCounter();
((ISupportInitialize)(performBytesR)).BeginInit();
performBytesR.CategoryName = ".NET CLR Networking";
performBytesR.CounterName = "Bytes Received";
performBytesR.InstanceName = "_global_";
((ISupportInitialize)(performBytesR)).EndInit();

// Later on ... periodically poll performance counters
long lThreads = performThreads.RawValue;    // Works!
long lBytesR = performBytesR.RawValue;      // Always returns 0 :o(

上面最后一行的工作原理是它不会抛出异常但总是 returns 0.

我已经尝试了 NextSample 和 NextValue，结果相同。如果我将 InstanceName 更改为进程名称，我会再次得到相同的结果。如果 InstanceName 设置为任何其他值，则在我调用 RawValue.

时会抛出异常 Instance 'XYZ' does not exist in the specified Category.

有什么想法吗？

Answer 1

根据Networking Performance Counters：

Networking performance counters need to be enabled in the configuration file to be used.

If networking counters are enabled, this will create and update both per-AppDomain and global performance counters. If disabled, the application will not provide any networking performance counter data.

接收到的字节总是返回 0

Bytes Received always returning 0

c#

performancecounter