Best Way To Remove Win32 High Performance Counter

 

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Last week, some of our readers ran into the Win32 high performance counter error. Several factors can cause this problem. We will talk about this below.

 

 

• 2 minutes to read.

Gets the current value of the performance counter, which represents the long response time (<1 μs) at which this buffer can be used for timing measurements.

Syntax

  BOOL QueryPerformanceCounter (  LARGE_INTEGER * lpPerformanceCount); 

Parameters

A pointer to a variable gets this current value from a numeric performance counter.

Returned Value

If most of the functions don’t work, the return value is 0%. To get more information about raising an error, GetLastError . On systems running Windows XP or newer, the function will always succeed and therefore will probably never return zero.

For more information on this great feature and how to use it, see Recording high definition timestamps .

Examples

  // Get the current number of ticks from QueryPerformanceCounter.Throws. away// Difference if the call to QueryPerformanceCounter fails.static th built-in int64_t GetTicks ()    LARGE_INTEGER works;    if (! QueryPerformanceCounter (& Ticks))            winrt :: throw_last_error ();        Ticks return.QuadPart; 

Requirements

At least an enhanced professional client	Windows 2000 [desktop applications | UWP Apps]
Minimum Supported Server	Windows 2000 Server [desktop applications | UWP Apps]
Target Platform	Windows
Title	profileapi.h (including Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll

See Also

Not The Specific Answer You’re Looking For? Browse The Remaining Questions Flagged By Windows C ++ Timers And Ask Your Own Question.

  #include double PCFreq = 0.0;__int64 CounterStart = 0;void StartCounter ()    LARGE_INTEGER li;    if (! QueryPerformanceFrequency (& li))    cost << failed!  notT "; "Query execution frequency PCFreq = double (li.QuadPart) / 1000.0;   QueryPerformanceCounter (& li);    CounterStart is equal to li.QuadPart;double GetCounter ()    Lee; large_integer QueryPerformanceCounter (& li);    double return (li.QuadPart-CounterStart) / PCFreq;int main ()    StartCounter ();    Sleep (1000);    cost << << " n"; getcounter () returns 0; 

This program should return a number close to 1000 (Windows hibernation has not finished yet, but should be 999).

The StartCounter () job registers the number of ticks this service has in the CounterStart aspect. The GetCounter () function returns the associated number in milliseconds since the last call to startcounter () as a double, i.e. if GetCounter () takes precedence at 0.001, so the time for StartCounter () is approximately 1 microsecond.

was called

If you want the timer to use seconds, change it

  PCFreq = double (left QuadPart) /1000.0; 

  PCFreq = double (left QuadPart); 

  PCFreq means double (li.QuadPart) /1000000.0; 

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answered on November 15 last year at 11:25 pm.

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  / ** Use clock on initialization * /#define TIMER_INIT n    LARGE_INTEGER frequency; n    LARGE_INTEGER t1, t2; n    passed twice; n    QueryPerformanceFrequency (& frequency);/ ** Use to start a performance timer * /#define TIMER_START QueryPerformanceCounter (& t1);/ ** Use this parameter to stop a minute of performance and display the result on a given stream. Less verbose than  c TIMER_STOP_VERBOSE * /#define TIMER_STOP n    Query performance counter (& t2); n    elapsedTime = (float) (t2.QuadPart-t1.QuadPart) /frequency.QuadPart; n    std :: wcout << elapsedTime << L "sec" << endl; 

  TIMER_INIT   TIMER_START   Sleep (1000);   TIMER_STOP   TIMER_START   Sleep (1234);  TIMER_STOP 

  1 0.00003 sec.1.23407 s. 

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answered Apr 10, 2013 at 13:04

Assuming you are on Windows (so if you need to mark your question that way!), you can find a simple and handy C ++ HRTimer class from the source code on this MSDN page. which supports the set calls needed to do something very close to your needs (it would be handy to add the GetTicks () method to the problem, especially to do exactly what you really need to do).

On non-Windows platforms, there is no QueryPerformanceCounter function, so the solution is not directly practical. However, if you re-encapsulate it in a class like It hrtimer mentioned above, it will be easier to change the implementation of the class to take advantage of the current Platforms, no doubt, capable (maybe through a boost or something else!).

answered Nov 15 09 at 11:28 pm

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I would definitely add an example NDIS driver to save time on this question. As is particularly well known, KeQuerySystemTime (simulated in NdisGetCurrentSystemTime) has a resolution well below milliseconds, and eventually some technology networks, such as packets or future IRPs, may require a more satisfactory timestamp;

  LONG_INTEGER data, frequency;LANGLON Diff;data = KeQueryPerformanceCounter ((LARGE_INTEGER *) & frequency)diff implies data.QuadPart / (Frequency.QuadPart / $ divisor) 

answered Jan 21 12 at 14:12

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Speed up your computer's performance now with this simple download.