How do I find the processor on which my thread is running in C#?

Question

如何在C＃中找到运行我的线程的处理器？

Answer 1

This is not necessarily a constant - the thread could be scheduled onto different cores across its lifetime. You can set affinity masks to tie a particular thread to a particular CPU if you want to. See the API docs for Thread.BeginThreadAffinity for more details on what can be done within .Net.

Answer 2

IMHO it's possible that the .NET thread is not bound to any of the native threads. >NET runtime can move the .NET threads between different native threads and processors anytime.

Answer 3

I'm not sure that you can. You can get the process affinity mask (GetProcessAffinityMask), and set the same (SetProcessAffinityMask). You can also set the thread affinity mask, but my understanding is that in doing so you restrict the thread to running on one of the processors you've set your affinity mask to.

If you're delving into specific threads running on specific cores you probably want to set the process affinity mask to define the set of cores your code can run on, and the threads in your process will then float among the selected cores.