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在多CPU系统上指定某些CPU来运行指定程序

Tags: /超级猛料/Hardware.硬件相关/CPU相关/   Date Created:
在多CPU系统上指定某些CPU来运行指定程序
run a program on a specified set of CPUs on a multiprocessor system?
function ExecuteProcess(FileName: string; Visibility: Integer; BitMask: Integer; Synch: Boolean): Longword;
//valori di Visibility:
{
Value                Meaning
SW_HIDE            :Hides the window and activates another window.
SW_MAXIMIZE        :Maximizes the specified window.
SW_MINIMIZE        :Minimizes the specified window and activates the next top-level window in the Z order.
SW_RESTORE        :Activates and displays the window. If the window is minimized or maximized,
                   Windows restores it to its original size and position. An application should
                   specify this flag when restoring a minimized window.
SW_SHOW                :Activates the window and displays it in its current size and position.
SW_SHOWDEFAULT        :Sets the show state based on the SW_ flag specified in the STARTUPINFO
                       structure passed to the CreateProcess function by the program that started the application.
SW_SHOWMAXIMIZED       :Activates the window and displays it as a maximized window.
SW_SHOWMINIMIZED       :Activates the window and displays it as a minimized window.
SW_SHOWMINNOACTIVE     :Displays the window as a minimized window. The active window remains active.
SW_SHOWNA              :Displays the window in its current state. The active window remains active.
SW_SHOWNOACTIVATE      :Displays a window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL          :Activates and displays a window. If the window is minimized or maximized,
                     Windows restores it to its original size and position. An application should specify this
                     flag when displaying the window for the first time.
}
//FileName: the name of the program I want to launch
//Bitmask:   specifies the set of CPUs on wich I want to run the program
   //the BitMask is built in the following manner:
   //I have a bit sequence: every bit is associated to a CPU (from right to left)
   //I set the bit to 1 if I want to use the corrisponding CPU, 0 otherwise
   //for example: I have 4 processor and I want to run the specified process on the CPU 2 and 4:
   //the corresponding bitmask will be     1010 -->2^0 * 0 + 2^1 * 1 + 2^2 * 0 + 2^3 * 1 = 2 + 8 = 10
   //hence BitMask = 10
//Synch: Boolean --> True if I want a Synchronous Execution (I cannot close
//my application before the launched process is terminated)
var
 zAppName: array[0..512] of Char;
 zCurDir: array[0..255] of Char;
 WorkDir: string;
 StartupInfo: TStartupInfo;
 ProcessInfo: TProcessInformation;
 Closed: Boolean;
begin
 Closed := True;
 StrPCopy(zAppName, FileName);
 GetDir(0, WorkDir);
 StrPCopy(zCurDir, WorkDir);
 FillChar(StartupInfo, SizeOf(StartupInfo), #0);
 StartupInfo.cb := SizeOf(StartupInfo);
 StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
 StartupInfo.wShowWindow := Visibility;
 if not CreateProcess(nil,
   zAppName, // pointer to command line string
   nil, // pointer to process security attributes
   nil, // pointer to thread security attributes
   False, // handle inheritance flag
   CREATE_NEW_CONSOLE or // creation flags
   NORMAL_PRIORITY_CLASS,
   nil, //pointer to new environment block
   nil, // pointer to current directory name
   StartupInfo, // pointer to STARTUPINFO
   ProcessInfo) // pointer to PROCESS_INF
   then Result := WAIT_FAILED
 else
 begin
   //running the process on the set of CPUs specified by BitMask
   SetProcessAffinityMask(ProcessInfo.hProcess, BitMask);
   /////
   if (Synch = True) then //if I want a Synchronous execution (I cannot close my
   // application before this process is terminated)
     begin
       Closed:= False;
       repeat
         case WaitForSingleObject(
           ProcessInfo.hProcess, 100) of
             WAIT_OBJECT_0 : Closed:= True;
             WAIT_FAILED : RaiseLastWin32Error;
         end;
         Application.ProcessMessages;
       until (Closed);
       GetExitCodeProcess(ProcessInfo.hProcess, Result);
       //exit code of the launched process (0 if the process returned no error  )
       CloseHandle(ProcessInfo.hProcess);
       CloseHandle(ProcessInfo.hThread);
     end
   else
     begin
       Result := 0;
     end;
 end;
end; {ExecuteProcess}
// Open Taskmanager, select the launched process, right click,
// "Set affinity", you will see a check on the CPUs you selected