How to start a thread on a specific core?

Question

I have a quad core CPU, and lets say I always want to start a Thread on the second core.

Is that possible in C#?

Check these discussions: social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/… eggheadcafe.com/community/aspnet/2/10156145/… gamedev.net/topic/… — ata
– ata, Commented Jul 5, 2011 at 14:43
Possible duplicate of How Can I Set Processor Affinity in .NET? — Yoh Deadfall
– Yoh Deadfall, Commented Apr 18, 2018 at 20:34

Community · Accepted Answer · 2017-05-23 10:30:37Z

9

Yes. Check out ProcessorAffinity for Windows or SetProcessorAffinity for XBox XNA.

This is also discussed on another Stackoverflow question.

edited May 23, 2017 at 10:30

CommunityBot

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answered Jul 5, 2011 at 14:39

Kynth

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Chris Van Opstal · Accepted Answer · 2011-07-05 14:35:34Z

8

Yes, take a look at the ProcessorAffinity property for the thread.

answered Jul 5, 2011 at 14:35

Chris Van Opstal

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Timeless · Accepted Answer · 2017-09-23 06:09:57Z

Set ProcessorAffinity of the process:

0x0001 = 0000 0001 - run on 1st core ↑ 0x0002 = 0000 0010 - run on 2nd core ↑ 0x0003 = 0000 0011 - run on 1st and 2nd core ↑↑ 0x0004 = 0000 0100 - run on 3rd core ↑

Simple code:

using (var process = Process.GetCurrentProcess()) { // only run on core number 1 process.ProcessorAffinity = (IntPtr) 0x0001; }

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