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    <p>I'd recommend OS functionality. There are performance counters and WinAPI functions for this on Windows.</p> <p>Here is an example using <strong>performance counters</strong> from <a href="http://blogs.msdn.com/bclteam/archive/2006/06/06/619284.aspx" rel="nofollow noreferrer">BCL Team Blog</a>:</p> <pre><code>foreach (Process proc in Process.GetProcesses()) { using (PerformanceCounter pcProcess = new PerformanceCounter("Process", "% Processor Time", proc.ProcessName)) { pcProcess.NextValue(); System.Threading.Thread.Sleep(1000); Console.WriteLine("Process:{0} CPU% {1}", proc.ProcessName, pcProcess.NextValue()); } } </code></pre> <p>This code makes the same <strong>with WMI</strong> from <a href="http://www.codeproject.com/KB/cs/perfgrid.aspx" rel="nofollow noreferrer">CodeProject</a>:</p> <pre><code>public string GetCPU() { decimal PercentProcessorTime=0; mObject_CPU.Get(); ulong u_newCPU = (ulong)mObject_CPU.Properties["PercentProcessorTime"].Value; ulong u_newNano = (ulong)mObject_CPU.Properties["TimeStamp_Sys100NS"].Value; decimal d_newCPU = Convert.ToDecimal(u_newCPU); decimal d_newNano = Convert.ToDecimal(u_newNano); decimal d_oldCPU = Convert.ToDecimal(u_oldCPU); decimal d_oldNano = Convert.ToDecimal(u_oldNano); // Thanks to MSDN for giving me this formula ! PercentProcessorTime = (1 - ((d_newCPU-d_oldCPU)/(d_newNano - d_oldNano)))*100m; // Save the values for the next run u_oldCPU = u_newCPU; u_oldNano = u_newNano; return PercentProcessorTime.ToString("N",nfi);; } </code></pre> <p>So you can query these OS providers (or others for your OS) and sleep your thread if processor utilization is high.</p>
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    1. COthank you. what I wanted to discuss was if "poll the cpu load and insert sleeps " is the only/best choise, no so how to do it.
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