On Wed, Oct 28, 2009 at 8:29 PM, Mike Ayers <mike_ay...@tvworks.com> wrote:
> > From: malar vizhi [mailto:malar...@gmail.com]
> > Sent: Wednesday, October 28, 2009 2:42 AM
>
> > This has to be fixed since "hrSystemUptime" is the very basic property
> > of system monitoring.
>
> > On Wed, Oct 28, 2009 at 2:53 PM, Bart Van Assche
> > <bart.vanass...@gmail.com> wrote:
>
> > Good question. I was assuming that switching to winExtDLL would
> > solve this issue, but apparently this is not the case. The tests I ran
> > on Windows 2003 and Windows XP confirm your report: I also see that the
> > value returned for hrSystemUptime is incorrect. It looks like the
> > returned value is ten times larger than the actual value. Some further
> > research showed that this behavior is caused by the extension DLL that
> > implements hrSystemUptime (c:\windows\system32\hostmib.dll). Other
> > reports confirm these findings (http://fixunix.com/snmp/64367-re-
> > interpreting-hrsystemuptime.html,
> > http://forums.cacti.net/about22137.html&highlight=). I have reported
> > this issue to Microsoft -- see also
> > https://connect.microsoft.com/onecare/feedback/ViewFeedback.aspx?Feedba
> > ckID=504908.
>
> Please review:
>
> http://support.microsoft.com/kb/169847
> http://www.ietf.org/rfc/rfc1213.txt?number=1213
>
> Note that the spec indicates TimeTicks are hundredths of a second,
> but Microsoft's documentation interprets them as milliseconds. This has
> always been a problem, expect it to always be a problem. Just divide your
> uptimes by ten for Windows systems.
>
Hello Mike,
Thanks for jumping in on this thread. I was already afraid that the chance
was small that Microsoft would fix this bug. But regarding the
interpretation of the TimeTicks definition, RFC 1213 is very clear about the
semantics of TimeTicks. A quote from the TimeTicks definition in RFC 1213:
"The time (in hundredths of a second) since the network management
portion of the system was last re-initialized."
Bart.
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