Hello Process!

I just created my first Windows service. Its sole purpose in life is to look for a Firefox process once a second and, if one is found, sets its CPU affinity to CPU0.

Works like a charm. :)

In lieu of posting binaries, which is what I'd much rather be doing, here's the source code, written in C# in Visual Studio 2005 RC. The trick is adding the service installer and using installutil.exe to install the service assembly. See Adding Installers to Your Service Application on MSDN.

I love .NET. I was intimidated by all the stuff I saw in MSDN about setting affinity until I got to .NET. Mmmm. Process.ProcessorAffinity()... Auughghghghghghh...

namespace AffinityMonitor
{
    public partial class AffinityMonitor : ServiceBase
    {
        public AffinityMonitor()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            System.Diagnostics.EventLog.WriteEntry("AffinityMonitor", "AffinityMonitor service started");
            backgroundWorker1.RunWorkerAsync();
        }

        protected override void OnStop()
        {
            System.Diagnostics.EventLog.WriteEntry("AffinityMonitor", "AffinityMonitor service stopping");
            backgroundWorker1.CancelAsync();
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            while (true)
            {
                Console.WriteLine("Tick!");
                Process[] processes = Process.GetProcessesByName("firefox");
                foreach (Process p in processes)
                {
                    p.ProcessorAffinity = new IntPtr(1);
                }
                System.Threading.Thread.Sleep(1000);
            }
        }
    }
}