WG: Strange output from Win32::PerfLib

Thu Feb 14 18:22:00 GMT 2013

Hi,
we do CPU load reporting with Win32::PerfLib - and we assume some problems with cygwins Win32::PerfLib.
1. As Demo script, I used 
http://www.jkrb.de/jmk/showsource.asp?f=data/scripts/processor.pl
2. We can reproduce this on Windows2008R2 and XP (no other Windows versions available for testing).
3. What is our problem:
With cygwin-perl, we always see 100% cpu load on all cores.
If running processor.pl, this looks like:
ActiveState-Perl:
>EigeneProgramme\Perl\bin\perl.exe tmp/processor.pl
Instance 4: 2.19%
Instance 1: 0.63%
Instance 3: 0.63%
Instance 2: 3.44%
Cygwin:
$ perl processor.pl 
Instance 4: 100.00%
Instance 1: 100.00%
Instance 3: 100.00%
Instance 2: 100.00%
(the values on ActiveState-Perl seems reasonable).
I looked through the output of Win32::PerfLib::GetObjectList and I see for some counters differences:
ActiveState:
'8' => {
 'DefaultScale' => 0,
 'Display' => '%',
 'CounterType' => 542180608,
 'Counter' => '6478914531250',
 'CounterNameTitleIndex' => 1746,
 'CounterSize' => 8,
 'CounterHelpTitleIndex' => 1747,
 'DetailLevel' => 400
 },
Cygwin:
 '8' => {
 'DefaultScale' => 0,
 'Display' => '%',
 'CounterType' => 542180608,
 'Counter' => 'I64d',
 'CounterNameTitleIndex' => 1746,
 'CounterSize' => 8,
 'CounterHelpTitleIndex' => 1747,
 'DetailLevel' => 400
 },
Look at "Counter => I64d" on cygwin. Maybe we have some issue with 64bit values (this is just a guess...)
Any ideas about that ?
Uli
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