为什么Windows服务似乎会旋转CPU内核

时间:2020-01-24 13:15:51

标签: c# multithreading windows-services console-application topshelf

我提供了Windows服务,该服务是控制台应用程序的包装。在功能上,它可以正常运行,并以有状态的方式启动和停止应用。我注意到的唯一问题是该服务将以100%运行1个核心。在VS2019调试模式下运行它时似乎并没有旋转CPU,因此我无法通过尝试调试代码来了解原因。它是使用Topshelf创建Windows服务的非常简单的程序。我在此处包含程序的两个文件:

class Program
    {
        static void Main(string[] args)
        {

            var rc = HostFactory.Run(x =>                                   
            {
                x.Service<BedrockServiceWrapper>(s =>                                  
                {
                    s.ConstructUsing(name => new BedrockServiceWrapper());                
                    s.WhenStarted(tc => tc.Start());                         
                    s.WhenStopped(tc => tc.Stop()); 


                });
                x.RunAsNetworkService();                                       

                x.SetDescription("Windows Service Wrapper for Windows Bedrock Server");                   
                x.SetDisplayName("BedrockService");                                  
                x.SetServiceName("BedrockService");                                  
            });                                                             

            var exitCode = (int)Convert.ChangeType(rc, rc.GetTypeCode());  
            Environment.ExitCode = exitCode;
        }
    }

public class BedrockServiceWrapper
    {

        Process process;
        Thread outputThread;
        Thread errorThread;
        Thread inputThread;
        static BackgroundWorker bedrockServer;
        string exePath;

        public BedrockServiceWrapper()
        {
            exePath = ConfigurationManager.AppSettings["BedrockServerExeLocation"];
            bedrockServer = new BackgroundWorker
            {
                WorkerSupportsCancellation = true
            };

        }


        public void Stop()
        {

            process.StandardInput.WriteLine("stop");            
            bedrockServer.CancelAsync();

        }



        public void Start()
        {

            bedrockServer.DoWork += (s, e) =>
            {

                    RunServer(exePath);

            };

            bedrockServer.RunWorkerAsync();

        }

        public void RunServer(string path)
        {


            // Fires up a new process to run inside this one
            process = Process.Start(new ProcessStartInfo
            {
                UseShellExecute = false,

                RedirectStandardError = true,
                RedirectStandardInput = true,
                RedirectStandardOutput = true,
                WindowStyle = ProcessWindowStyle.Hidden,
                FileName = path



            });

            // Depending on your application you may either prioritize the IO or the exact opposite
            const ThreadPriority ioPriority = ThreadPriority.Highest;
            outputThread = new Thread(outputReader) { Name = "ChildIO Output", Priority = ioPriority };
            errorThread = new Thread(errorReader) { Name = "ChildIO Error", Priority = ioPriority };
            inputThread = new Thread(inputReader) { Name = "ChildIO Input", Priority = ioPriority };

            // Set as background threads (will automatically stop when application ends)
            outputThread.IsBackground = errorThread.IsBackground
                = inputThread.IsBackground = true;

            // Start the IO threads
            outputThread.Start(process);
            errorThread.Start(process);
            inputThread.Start(process);

            process.WaitForExit();

        }

        /// <summary>
        /// Continuously copies data from one stream to the other.
        /// </summary>
        /// <param name="instream">The input stream.</param>
        /// <param name="outstream">The output stream.</param>
        private static void passThrough(Stream instream, Stream outstream)
        {
            byte[] buffer = new byte[4096];
            while (true)
            {
                int len;
                while ((len = instream.Read(buffer, 0, buffer.Length)) > 0)
                {

                    outstream.Write(buffer, 0, len);
                    outstream.Flush();
                }
            }
        }

        private static void outputReader(object p)
        {
            var process = (Process)p;
            // Pass the standard output of the child to our standard output
            passThrough(process.StandardOutput.BaseStream, Console.OpenStandardOutput());
        }

        private static void errorReader(object p)
        {
            var process = (Process)p;
            // Pass the standard error of the child to our standard error
            passThrough(process.StandardError.BaseStream, Console.OpenStandardError());
        }

        private static void inputReader(object p)
        {
            var process = (Process)p;
            // Pass our standard input into the standard input of the child
            passThrough(Console.OpenStandardInput(), process.StandardInput.BaseStream);
        }
    }

这与线程跨流复制输入和输出有关吗?我不相信有太多报道,但是也许它只是试图复制很多零长度的Stream块?

Github:https://github.com/ravetroll/BedrockService

0 个答案:

没有答案