PerformanceCounter 性能计数器的使用

1：获取性能计数器类别列表

public static void GetCategoryNameList()
{PerformanceCounterCategory[] myCat2;myCat2 = PerformanceCounterCategory.GetCategories();for (int i = 0; i < myCat2.Length; i++){Console.WriteLine(myCat2[i].CategoryName.ToString());}
}

2：获取性能计数器类别下的实例的名称实例下的性能计数器的名称

public static void GetInstanceNameListANDCounterNameList(string CategoryName)
{string[] instanceNames;ArrayList counters = new ArrayList();PerformanceCounterCategory mycat = new PerformanceCounterCategory(CategoryName);try{instanceNames = mycat.GetInstanceNames();if (instanceNames.Length == 0){counters.AddRange(mycat.GetCounters());}else{for (int i = 0; i < instanceNames.Length; i++){counters.AddRange(mycat.GetCounters(instanceNames[i]));}}for (int i = 0; i < instanceNames.Length; i++){Console.WriteLine(instanceNames[i]);}Console.WriteLine("******************************");foreach (PerformanceCounter counter in counters){Console.WriteLine(counter.CounterName);}}catch (Exception){Console.WriteLine("Unable to list the counters for this category");}
}

3：根据categoryName，counterName，instanceName获得性能情况显示

private static void PerformanceCounterFun(string CategoryName, string InstanceName, string CounterName)
{PerformanceCounter pc = new PerformanceCounter(CategoryName, CounterName, InstanceName);while (true){Thread.Sleep(1000); float cpuLoad = pc.NextValue();Console.WriteLine("CPU load = " + cpuLoad + " %.");}
}

4：调用方法3显示cpu使用率

PerformanceCounterFun("Processor", "_Total", "% Processor Time");