Processor performance counter

[Siekmanski]

Wrote a Processor performance counter, using the Performance Data Helper api (PDH).
It reads the performance used in percentages from all Logical Processors and the Total average.

There are 3 functions,

- InitProcessorPerformanceCounter
- GetProcessorPerformance
- CloseProcessorPerformanceCounter

Call "GetProcessorPerformance" once per second, the percentages are saved in the pProcessorPercentages buffer.

I've tested it only with Windows 8.1.

Would be nice if you guys can test if it works on an other OS.

Marinus

[FORTRANS]

Hi Marinus,

   Well it runs on Windows 2000.  Are you interested in Win98?

Code Select Expand

Logical Processors: 1

% Processor Time

Processor :  0   Total
Percentage: 000% 000%

Regards,

Steve N.

[Siekmanski]

Thanks Steve,

No need to test on win98 I think.

MSDN:
Minimum supported client for PDH is Windows XP
Minimum supported server Windows Server 2003

Does it run ok on Windows 2000?
Because I see your percentages are zero, do they give the same result as in TaskManager performance tab?

This is the result on my PC,

Code Select Expand

Logical Processors: 12

Percentage processortijd

Processor :  0    1    2    3    4    5    6    7    8    9   10   11   Total
Percentage: 000% 003% 005% 001% 001% 001% 011% 000% 000% 000% 008% 000% 003%

[nidud]

deleted

[Siekmanski]

Thanks nidud,

Do the percentages change over time and show the realtime CPU load just like in TaskManager?

[nidud]

deleted

[Siekmanski]

OK  :t,
Then it works on WinXP too. 

[jj2007]

And on Win7-64 :t

Code Select Expand

Logical Processors: 4

% Tempo processore

Processor :  0    1    2    3   Total
Percentage: 006% 000% 003% 000% 002%

[sinsi]

Works on Win10-64 (but gives a warning about unsigned code which I ignored).
Total % doesn't really change unless most of the core % are all up.

[Siekmanski]

Thanks guys,

@sinsi, Total should give us the average % of all processors.
Is the Total value not correct on your Win10-64?

[sinsi]

Seems correct, it's hard to get 8 cores over a few percent each

[Siekmanski]

 Thanks.

[FORTRANS]

Hi,

Does it run ok on Windows 2000?
Because I see your percentages are zero, do they give the same result as in TaskManager performance tab?

   Yes, seems to work the same.  Here is one captured when the
browser froze up for a while.

Code Select Expand

Logical Processors: 1

% Processor Time

Processor :  0   Total
Percentage: 100% 100%

Regards,

Steve N.

[hutch--]

Marinus,

I am not sure how to run the test piece but its padding along on very low percentages and the highest I have seen is 6%. OS is Win10 Professional.


Logical Processors: 12

% Processor Time

Processor :  0    1    2    3    4    5    6    7    8    9   10   11   Total
Percentage: 000% 001% 003% 001% 000% 000% 000% 000% 000% 000% 000% 000% 000%

[Siekmanski]

Hi Steve,

It runs ok then on Win2000.

Hi hutch,

It shows the CPU load per logical processor.

In your case there are processes running on processor 1, 2 and 3 at low speed.
Total = the average CPU load of all processors = 1+3+1=5/12=0.42 rounded to zero.