PERF_ELAPSED_TIME Counter

[cuffer]

I've created my own PerfMon object and counters for my server application.
I'm able to get PERF_COUNTER_RAWCOUNT and PERF_COUNTER_COUNTER counters
working, but I can't seem to get the PERF_ELAPSED_TIME counters working.
PERF_ELAPSED_TIME is defined in WINPERF.H as:

// The data collected in this counter is actually the start time of the
// item being measured. For display, this data is subtracted from the
// sample time to yield the elapsed time as the difference between the two.
// In the definition below, the PerfTime field of the Object contains
// the sample time as indicated by the PERF_OBJECT_TIMER bit and the
// difference is scaled by the PerfFreq of the Object to convert the time
// units into seconds.
#define PERF_ELAPSED_TIME \
(PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_ELAPSED |\
PERF_OBJECT_TIMER | PERF_DISPLAY_SECONDS)



In my app I value the counter by:

time_t StartTime;
g_PrfData.GetCtr32(ELAPSED_TIME) = time(&StartTime);



This was just a guess, I have no idea what kind of data type the "start
time" in the comment above expects.

Any ideas?

Thanks,

-- Pat
mailto: [email protected]

Try this :
FILETIME ta,tb,tc,td;
GetProcessTimes(GetCurrentProcess(),(LPFILETIME)&ta,(LPFILETIME)&tb,
(LPFILETIME)&tc,(LPFILETIME)&td);
g_PrfData.GetCtr32 = ta.dwHighDateTime * 4294967296e+0 + ta.dwLowDateTime;

Remember : PERF_ELAPSED_TIME is a PERF_SIZE_LARGE counter(LONGLONG, GetCtr32 ?).

The monitor compute this counter making :
float fTime = (float)((object.PerfTime.u.HighPart * 4294967296e+0 +
object.PerfTime.u.LowPart) - GetCtr32) /
(object.PerfFreq.u.HighPart * 4294967296e+0 +
object.PerfFreq.LowPart);