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我想设置的文件IO在不改变线程的优先级低优先级,于是我就用SetFileInformationByHandle象下面这样:SetFileInformationByHandle与IO优先工作不正常
FILE_IO_PRIORITY_HINT_INFO priorityHint;
priorityHint.PriorityHint = IoPriorityHintVeryLow;
bool result = SetFileInformationByHandle(desHandle,
FileIoPriorityHintInfo,
&priorityHint,
sizeof(priorityHint));
,我喜欢这样创建文件:
HANDLE desHandle = CreateFile(desPath.c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
每次我写4KB数据desHandle这样的:
while()
{
....
if (!WriteFile(desHandle, startPtr, numOfEachWrite, reinterpret_cast<LPDWORD> (&numOfBytesWritten), NULL))![enter image description here][1]
{}
...
}
但当我使用进程监视器仅查找低优先级的第一个4kb数据时,所有其他优先级均为正常优先级