Restrict a process to run on a certain CPU.

You can call GetSystemInfo to check the number of CPUs, and then call:

 

BOOL WINAPI SetProcessAffinityMask(   __in          HANDLE hProcess,   __in          DWORD_PTR dwProcessAffinityMask ); BOOL WINAPI SetProcessAffinityMask(  __in          HANDLE hProcess,  __in          DWORD_PTR dwProcessAffinityMask);

The first parameter indicates the process to be set, and the second parameter is a mask, which indicates the CPU on which the operation can be performed. For example, set 5 (101) to run on the first and third CPUs.

 

There are several other related functions:

BOOL WINAPI GetProcessAffinityMask(   __in          HANDLE hProcess,   __out         PDWORD_PTR lpProcessAffinityMask,   __out         PDWORD_PTR lpSystemAffinityMask ); BOOL WINAPI GetProcessAffinityMask(  __in          HANDLE hProcess,  __out         PDWORD_PTR lpProcessAffinityMask,  __out         PDWORD_PTR lpSystemAffinityMask);

DWORD_PTR WINAPI SetThreadAffinityMask(   __in          HANDLE hThread,   __in          DWORD_PTR dwThreadAffinityMask ); DWORD_PTR WINAPI SetThreadAffinityMask(  __in          HANDLE hThread,  __in          DWORD_PTR dwThreadAffinityMask);