QueryPerformanceCounter function - Win32 apps | Microsoft Learn
WEBFeb 22, 2024 · Retrieves the current value of the performance counter, which is a high resolution (<1us) time stamp that can be used for time-interval measurements.
c++ - How to use QueryPerformanceCounter? - Stack Overflow
WEBSleep(1000); cout << GetCounter() <<"\n"; return 0; } This program should output a number close to 1000 (windows sleep isn't that accurate, but it should be like 999). The StartCounter() function records the number of ticks the performance counter has in the CounterStart variable.
Acquiring high-resolution time stamps - Win32 apps
WEBApr 18, 2023 · Windows provides APIs that you can use to acquire high-resolution time stamps, or measure time intervals. The primary API for native code is QueryPerformanceCounter (QPC). For device drivers, the kernel-mode API is KeQueryPerformanceCounter. For managed code, the System.Diagnostics.Stopwatch …
How to use QueryPerformanceCounter to get results in seconds?
WEBNov 15, 2014 · You need to get frequency and divide your 2 counters difference by it. LARGE_INTEGER fr,t1,t2; QueryPerformanceCounter(&t1); // some lengthy code ... QueryPerformanceCounter(&t2); QueryPerformanceFrequency(&fr); double diff_sec = (t2.QuadPart-t1.QuadPart)/(double)fr.QuadPart; edited Nov 15, 2014 at 12:28. …
What happens when QueryPerformanceCounter is called?
WEBSep 15, 2010 · Windows QueryPerformanceCounter() has logic to determine the number of processors and invoke syncronization logic if necessary.
c++ - QueryPerformanceCounter and weird results - Stack Overflow
WEBI want to use PerformanceCounter to measure how much time I need for some operation. I don't know much about PerformanceCounter and C++ in general. I found some code here:
High-precision timing with the QueryPerformanceCounter API …
WEBOct 7, 2000 · You should call QueryPerformanceFrequency once, at the beginning of your program, to retrieve the internal frequency of the high-res timer, that is the number of ticks it provides each second. Then you can call QueryPerformanceCounter as many times as you wish: each call returns the value of the internal counter.
Get the Current QueryPerfromanceCounter Value in Debugger
WEBFeb 1, 2022 · Is there a way to get the current value of QueryPerformanceCounter while in the debugger? We use QPC in our code for all time values, but without the "current" time we have no way to calculate the time delta for these values.
High-Performance Timer in C# - CodeProject
WEBJul 25, 2002 · High resolution timing is supported in Win32 by the QueryPerformanceCounter() and QueryPerformanceFrequency() API methods. This timer functions have much better resolution than the "standard" millisecond-based timer calls, like the GetTickCount() method.
Q172338: HOWTO: Use QueryPerformanceCounter to Time Code
WEBThis article describes how to use the QueryPerformanceCounter function to time application code.
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