.net – 进程的I / O优先级如何增加？

两个重要的事情要注意：

>您只能将IO请求的优先级降低到正常值以下.
>司机可以忽略任何这样的请求,并将其视为正常.

客户端应用程序的有用API为SetFileInformationByHandle：

FILE_IO_PRIORITY_HINT_INFO priorityHint;
priorityHint.PriorityHint = IoPriorityHintLow;
result = SetFileInformationByHandle( hFile,FileIoPriorityHinTinfo,&priorityHint,sizeof(PriorityHint));

SetPriorityClass：

// reduce cpu,page and IO priority for the whole process
result = SetPriorityClass( GetCurrentProcess(),PROCESS_MODE_BACKGROUND_BEGIN);
// do stuff
result = SetPriorityClass( GetCurrentProcess(),PROCESS_MODE_BACKGROUND_END);

SetThreadPriority这是相似的：

// reduce cpu,page and IO priority for the current thread
SetThreadPriority(GetCurrentThread(),THREAD_MODE_BACKGROUND_BEGIN);
// do stuff
SetThreadPriority(GetCurrentThread(),THREAD_MODE_BACKGROUND_END);

SetFileBandwithReservation：

// reserve bandwidth of 200 bytes/sec
result = SetFileBandwidthReservation( hFile,1000,200,falSE,&transferSize,&outstandingrequests );

对于.Net做普通的东西P / Invoke.