这篇文章我们分享一种如何在 .NETCore
中获取 CPU使用率的方法, 它所报告的这个值和 任务管理器
中报告的 CPU 使用值 差不多是一致的。
在 .NET Framework
中,很多人会用 PerformanceCounter
类做这件事情,参考如下代码:
public class Program{public static void Main(string[] args){while (true){var cpuUsage = GetCpuUsageForProcess();Console.WriteLine(cpuUsage);}}private static int GetCpuUsageForProcess(){var currentProcessName = Process.GetCurrentProcess().ProcessName;var cpuCounter = new PerformanceCounter("Process", "% Processor Time", currentProcessName);cpuCounter.NextValue();return (int)cpuCounter.NextValue();}}
但 PerformanceCounter
在 .NETCore 中是没有的,所以只能采用其他方式了,其实在 System.Diagnostics.Process
类中有一个 TotalProcessorTime
属性,它可以准实时的统计当前进程所消耗的CPU处理器时间,参考如下代码:
class Program{public static async Task Main(string[] args){var task = Task.Run(() => ConsumeCPU(50));while (true){await Task.Delay(2000);var cpuUsage = await GetCpuUsageForProcess();Console.WriteLine(cpuUsage);}}public static void ConsumeCPU(int percentage){Stopwatch watch = new Stopwatch();watch.Start();while (true){if (watch.ElapsedMilliseconds > percentage){Thread.Sleep(100 - percentage);watch.Reset();watch.Start();}}}private static async Task<double> GetCpuUsageForProcess(){var startTime = DateTime.UtcNow;var startCpuUsage = Process.GetCurrentProcess().TotalProcessorTime;await Task.Delay(500);var endTime = DateTime.UtcNow;var endCpuUsage = Process.GetCurrentProcess().TotalProcessorTime;var cpuUsedMs = (endCpuUsage - startCpuUsage).TotalMilliseconds;var totalMsPassed = (endTime - startTime).TotalMilliseconds;var cpuUsageTotal = cpuUsedMs / (Environment.ProcessorCount * totalMsPassed);return cpuUsageTotal * 100;}}
可以看到程序每2s输出一次,观察到 output 和 任务管理器 中的CPU利用率基本是一致的。
译文链接:https://medium.com/@jackwild/getting-cpu-usage-in-net-core-7ef825831b8b