how to set CPU affinity of a program?

c# .net visual-studio-2008 cpu affinity
George2 picture George2 · Jun 27, 2009 · Viewed 10.7k times · Source

I have a program written in C#, I am using VSTS 2008 + .Net 3.5 + Windows Vista Enterprise x86 to develop a Windows Forms application.

My current computer is dual-core CPU, I want to set CPU affinity of my program to run on a specific CPU and free another CPU to do some other job. Any ideas how to do this? Either through coding or configuration is ok.

A little more background is, my program is CPU intensive, so I do not want to let it occupy all two CPU resources on my computer and I want to free one CPU so that I can browse network at the same time quickly. :-)

thanks in advance, George

Answer

Gaurav picture Gaurav · Jun 27, 2009
  1. Go to Task Manager -> Processes tab.
  2. Look for your program. Right click on it.
  3. Select Set Affinity and uncheck one of the checkboxes.

This should free up one processor for you.

For doing it from the code you can add this statement:

System.Diagnostics.Process.GetCurrentProcess().ProcessorAffinity = (System.IntPtr) 1;

Cheers!

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