用SetProcessAffinityMask为进程指定CPU

The SetProcessAffinityMask function sets a processor affinity mask for the threads of the specified process.

BOOL SetProcessAffinityMask(
  HANDLE hProcess,
  DWORD_PTR dwProcessAffinityMask
);

 

      // get system info
    SYSTEM_INFO SystemInfo;
    GetSystemInfo( & SystemInfo);

    printf( " "
         " dwNumberOfProcessors=%u, dwActiveProcessorMask=%u, wProcessorLevel=%u, "
         " wProcessorArchitecture=%u, dwPageSize=%u " ,
        SystemInfo.dwNumberOfProcessors, SystemInfo.dwActiveProcessorMask, SystemInfo.wProcessorLevel, 
        SystemInfo.wProcessorArchitecture,SystemInfo.dwPageSize
        );
     if (SystemInfo.dwNumberOfProcessors  <=   1 )  return ;

    DWORD dwMask  =   0x0000 ;
    DWORD dwtmp  =   0x0001 ;
     int  nProcessorNum  =   0 ;
     for ( int  i  =   0 ; i  <   32 ; i ++ )
     ... {
        if(SystemInfo.dwActiveProcessorMask & dwtmp)
        ...{
            nProcessorNum++;
            if(nProcessorNum <= 2)
            ...{
                //如果系统中有多个处理器，则选择第二个处理器
                dwMask = dwtmp;
            }
            else
            ...{
                break;
            }
        }

        dwtmp *= 2;

    } // end of for

     // 进程与指定cpu绑定
    SetProcessAffinityMask(GetCurrentProcess(), dwMask);
     // 线程与指定cpu绑定
     // SetThreadAffinityMask(GetCurrentThread(),dwMask);

     return  ;