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Acquiring high-resolution time stamps - Win32 apps | Microsoft Docs
https://docs.microsoft.com/en-us/windows/win32/sys ...
May 31, 2018 ... Windows provides APIs that you can use to acquire high-resolution time stamps or measure time intervals. ... for acquiring time stamps. General FAQ about QPC and TSC; FAQ about programming with QPC and TSC; Low-level hardware clock characteristics ... Cases might exist where QueryPerformanceFrequency doesn't return the actual frequency of the hardware tick generator.
QueryPerformanceCounter function - Win32 apps | Microsoft Docs
https://docs.microsoft.com/en-us/windows/win32/api ...
Dec 5, 2018 ... Retrieves the current value of the performance counter, which is a high resolution (<1us) time stamp that can be used for time-interval measurements.
Implementing a High-Resolution Time Provider for Windows ...
https://docs.microsoft.com/en-us/archive/msdn-maga ...
Oct 11, 2019 ... ::GetSystemTimeAsFileTime(&ft0); do { ::GetSystemTimeAsFileTime(&ft1); :: QueryPerformanceCounter(&li); } ... As it turns out, my high-resolution clock had deviated from the real system time by a millisecond after only 110 ...
CPU clock frequency and thus QueryPerformanceCounter wrong ...
https://stackoverflow.com/questions/644510/cpu-clo ...
QueryPerformanceCounter() and QueryPerformanceFrequency() offer a bit better resolution, but have different issues. For example in Windows XP, ... Wall time is not affected, it uses a RTC. You should probably stop using the ...
Why QueryperformanceCounter timed different from wall clock ...
https://stackoverflow.com/questions/6420051/why-qu ...
function NowInternal: TDateTime; const // maximum time in seconds between synchronising the high-resolution clock ... lThreadPriority := CsiGetCurrentThreadPriority; try CsiSetProcessPriorityClass(REALTIME_ PRIORITY_CLASS); ...
how to get a real time clock in C#? - Stack Overflow
https://stackoverflow.com/questions/2800559/how-to ...
Stopwatch uses the QueryPerformanceCounter and QueryPerformanceFrequency Windows APIs. The resolution is not standard across machines, but generally it's on the order of microseconds (see this KB article for more info).
windows timing drift of performancecounter C++ - Stack Overflow
https://stackoverflow.com/questions/35601880/windo ...
This constant frequency is only near the true frequency. ... Inevitably both clocks can't be the same and you will see them drift apart. ... QueryPerformanceCounter - is a high-resolution time stamps or measure time intervals.
What's the difference between clock(), gettickcount() - Stack Overflow
https://stackoverflow.com/questions/1559864/whats- ...
QueryPerformanceCounter has a precision in the microsecond to nanosecond range. ... it affects thread scheduling, and the overhead of more frequent interrupts also leaves less CPU time for actually running program code, ...
Is it possible to get Time stamps with use of Query performance ...
https://stackoverflow.com/questions/17769592/is-it ...
QueryPerformanceCounter is just a counter that contains some value when the machine is powered on and counts up. It's not connected to the wall clock at all. GetSystemTime and GetSystemTimeAsFileTime are accurate to ...
High Resolution Timer - Song Ho Ahn
http://www.songho.ca/misc/timer/timer.html
QueryPerformanceCounter() is used to get the current elapsed ticks, and QueryPerformanceFrequency() is used to get the number of ticks per second, which is used to convert ticks to the actual time. Here is a usage of ...