要想创建自定义的计数器，先得实现IPerfCounterProvider接口，CreateCounters方法声明要创建的计数器，CountersCreated方法把创建的计数器赋值给本类的成员，PerformanceObjectName返回要创建自定义计数器的分类名。
PerfCounterFactory主要用来创建一个IPerfCounterProvider的实例，它有个GetCounters的泛型方法用来创建一个IPerfCounterProvider的实例，CreateCounters方法用来实际的创建性能计数器，另两个AddPerfCounter方法和Find方法是让IPerfCounterProvider的两个方法用的，下面的例子里会有。
PerfCounter是一个实体类，保存每个计数器的名称，帮助，类型。
好，我们要监控一个web服务的性能，这个Web服务提供相乘和相加的服务，我们要知道这个Web服务的总请求数，每秒调用次数，并发调用数，每个web方法每秒的调用次数，创建计数器如下，关于计数器的类型，及性能计数器的相关内容，请查看MSDN，计数器类型有总量计数器，平均计数器，速率计数器，并发计数器等，分别适用于不同的需求。
复制 
保存publicclassMathServicePerfCounter : IPerfCounterProvider
{staticMathServicePerfCounter _instance =
PerfCounterFactory.GetCounters<MathServicePerfCounter>();publicstaticMathServicePerfCounter Instance
{get{return_instance; }
}publicPerformanceCounter TotalOfRequest;publicPerformanceCounter RateOfRequest;publicPerformanceCounter RateOfAddition;publicPerformanceCounter RateOfMultiplication;publicPerformanceCounter CountOfCurrentRequest;conststringTotalOfRequestStr ="Total # req";conststringRateOfRequestStr ="req/sec";conststringRateOfAdditionStr ="Addition/sec";conststringRateOfMultiplicationStr ="Multiplication/sec";conststringCountOfCurrentRequestStr ="current # req";#region IPerfCounterProvider 成员publicvoidCreateCounters()
{
PerfCounterFactory.AddPerfCounter(newPerfCounter(TotalOfRequestStr,"请求总数",
PerformanceCounterType.NumberOfItems64));
PerfCounterFactory.AddPerfCounter(newPerfCounter(RateOfRequestStr,"每秒请求的数量",
PerformanceCounterType.RateOfCountsPerSecond64));
PerfCounterFactory.AddPerfCounter(newPerfCounter(RateOfAdditionStr,"每秒相加请求的数量",
PerformanceCounterType.RateOfCountsPerSecond64));
PerfCounterFactory.AddPerfCounter(newPerfCounter(RateOfMultiplicationStr,"每秒相成的数量",
PerformanceCounterType.RateOfCountsPerSecond64));
PerfCounterFactory.AddPerfCounter(newPerfCounter(CountOfCurrentRequestStr,"当前并发请求量",
PerformanceCounterType.RateOfCountsPerSecond64));
}publicvoidCountersCreated()
{
TotalOfRequest = PerfCounterFactory.Find(TotalOfRequestStr);
RateOfRequest = PerfCounterFactory.Find(RateOfRequestStr);
RateOfAddition = PerfCounterFactory.Find(RateOfAdditionStr);
RateOfMultiplication = PerfCounterFactory.Find(RateOfMultiplicationStr);
CountOfCurrentRequest = PerfCounterFactory.Find(CountOfCurrentRequestStr);
}publicstringPerformanceObjectName()
{return"MathServicePerfCounter";
}#endregion}
文章来源于软件测试时代 http://www.testage.net/
