high frequency timing .NET

Question

I\'m looking to create a high frequency callback thread. Essentially I need a function to execute at a regular high frequency (up to 100Hz) interval. I realize that windows

Answer 1

Thread.Sleep() does not seem to be as inaccurate as you may think at such small intervals, The following on Windows 8.1 x64 i7 Laptop .NET 4.0:

using System;
using System.Diagnostics;
using System.Threading;

namespace HighFrequency
{
    class Program
    {
        static void Main(string[] args)
        {
            var count = 0;
            var stopwatch = new Stopwatch();
            stopwatch.Start();
            while(count <= 1000)
            {
                Thread.Sleep(1);
                count++;
            }
            stopwatch.Stop();
            Console.WriteLine("C# .NET 4.0 avg. {0}", stopwatch.Elapsed.TotalSeconds / count);
        }
    }
}

Output:

C# .NET 4.0 avg. 0.00197391928071928

So just under 2ms interval! I guess if there was more contention that could rise pretty quickly, though I do have a number of apps open, just nothing grinding away.

At sleeping for 10ms i.e. 100HZ, got an average of 0.0109... pretty much spot on!