异步WCF服务和通话时间性能计数器 [英] Async WCF Service and Call Duration Performance Counter

问题描述

我试图来衡量的通话时长性能WCF服务方法计数器。

I am trying to measure the Calls Duration performance counter for a WCF service method.

我有一个非常简单的WCF服务为如下。

I have a very simple WCF service as given below.

Service接口：

Service interface:

[ServiceContract]
public interface IFooService
{      
    [OperationContract]
    string DoSomeExpensiveOperation();
}

服务实现：

public class FooService : IFooService
{

    public string DoSomeExpensiveOperation()
    {
        Thread.Sleep(3000);
        return "Some valuable information";         
    }

}

在执行同步（如上述），我可以看到正在填充通话时间。

When the implementation is synchronous (as given above), I can see the Calls Duration being populated.

然而，当服务实现是异步（如下面给出的），没有被填充。

However, when the service implementation is async (as given below), nothing is populated.

Service接口：

Service interface:

[ServiceContract]
public interface IFooService
{       
    [OperationContract]
    Task<string> DoSomeExpensiveOperation();

}

服务实现：

public class FooService : IFooService
{        
    public async Task<string> DoSomeExpensiveOperation()
    {
        Thread.Sleep(3000);
        return await Task.FromResult("Some expensive value");
    }
}

我甚至试过发布的await后自定义性能计数器。即使这样没有工作。

I've even tried publishing a custom performance counter after the await. Even this did not work.

鸭preciate如果任何人都可以阐明这一些轻。

Appreciate if anyone can shed some light on this.

谢谢！

推荐答案

通话时间不支持异步调用（操作/服务或端点）。
其他WCF柜台仍然是有效的，但不是这一个。

Call Duration is not supported for async calls (Operation/Service or Endpoint). Others WCF counters are still valid but not this one.

MSDN ，

在上一个异步WCF服务的通话时间计数器使用
  总是返回-1。

When used on an asynchronous WCF service the Call Duration counter will always return -1.

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