15 May
2006
15 May
'06
7:09 p.m.
Silex wrote:
The problem with QueryPerformanceCounter is that QueryPerformanceFrequency is not (AFAIK) required to return the same value every time. It may be CPU clock based, and a low power CPU can vary its frequency depending on load.
No, "the frequency cannot change while the system is running." (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui...)
You are right, a variable frequency is explicitly disallowed in the documentation now. Most chipset bugs that affected QPC also don't seem to be an issue nowadays.