IEXPLORE.exe的奇怪的ProcessorAffinity问题

Question

I need to launch IE and set the affinity to a particular single CPU. When running the following c# code, as expected notepad.exe is started and has it's affinity set to just cpu2, strangely iexplore.exe is started with its affinity set to just cpu0. No matter what I set ProcessorAffinity to iexplore.exe always goes to cpu0.

I have tested this on 4 core xp 32 bit and 4 core 2008 64 bit, both IE8.

using System;
using System.Diagnostics;
public class Launch
{

    public static void Main(string[] args)
    {
        lauchWithAffinity("c:/windows/system32/notepad.exe");
        lauchWithAffinity("c:/Program Files/Internet Explorer/IEXPLORE.EXE");
    }
    static void lauchWithAffinity(string exePath)
    {
        ProcessStartInfo start = new ProcessStartInfo();
        start.FileName = exePath;
        Process myProcess =Process.Start(start);
        myProcess.ProcessorAffinity = (System.IntPtr)4; //3rd cpu aka cpu2 
        //http://msdn.microsoft.com/en-us/library/system.diagnostics.process.processoraffinity.aspx
    }

}

Answer 1

I have tested your program and it works fine for me. I even checked in the task manager and the affinity of iexplore.exe is set to CPU 2.