WMI进程监视使用过多的CPU！有更好的方法吗? [英] WMI Process Watching uses too much CPU! Any better method?

问题描述

我需要注意Windows机器上何时启动或停止了某些进程.我目前正在进入WMI系统并每5秒查询一次，但这会导致每5秒CPU峰值，因为WMI是WMI.有更好的方法吗?我可以列出正在运行的进程，然后通过System.Diagnostics命名空间将一个Exited事件附加到它们，但是没有用于创建的事件处理程序.

I need to watch when certain processes are started or stopped on a Windows machine. I'm currently tapped into the WMI system and querying it every 5 seconds, but this causes a CPU spike every 5 seconds because WMI is WMI. Is there a better way of doing this? I could just make a list of running processes and attach an Exited event to them through the System.Diagnostics Namespace, but there is no Event Handler for creation.

推荐答案

这并不是您在现实世界中的确切做法，但应该有所帮助.这似乎根本不会驱动我的CPU.

This is not exactly how you'd do it in the real world but should help. This seems not to drive my CPU much at all.

    static void Main(string[] args)
    {
        // Getting all instances of notepad
        // (this is only done once here so start up some notepad instances first)
        // you may want use GetProcessByPid or GetProcesses and filter them as required
        Process[] processesToWatch = Process.GetProcessesByName("notepad");

        foreach (var process in processesToWatch)
        {
            process.EnableRaisingEvents = true;
            process.Exited +=
                (s, e) => Console.WriteLine("An instance of notepad exited");
        }

        Thread watchThread = new Thread(() =>
            {
                while (true)
                {
                    Process[] processes = Process.GetProcesses();
                    foreach (var process in processes)
                    {
                        Console.WriteLine("{0}:{1}", process.Id, process.ProcessName);
                    }
                    // Don't dedicate a thread to this like I'm doing here
                    // setup a timer or something similiar
                    Thread.Sleep(2000);
                }
            });
        watchThread.IsBackground = true;
        watchThread.Start();

        Console.WriteLine("Polling processes and waiting for notepad process exit events");
        Console.ReadLine();
    }

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