NTP problem - Clock too fast for NTP to keep up?

Peter Kiem zordah at zordah.net
Thu Feb 10 06:56:39 UTC 2005


Hi Gene,

> Given a stable clock in your box, which from the reports below I 
> doubt, every 2 minutes would, I think, give results that are totally 
> lost in the propagation delays of the net.

Actually the physical server is fine, only need to run ntpdate once per 
hour on it.

And this is contacting my firewall for the time, not the net.  I have 
other servers synchronising off the same firewall without issues.

Really seems like something screws up running Fedora inside VMware GSX.
Everything else is running perfectly though, just the system clock is 
screwy.  Windows in a virtual server on the same host server is fine.

> This doesn't look like a tickadj correctable error to be truthfull 
> unless you take tickadj down in the 6000 - 7500 range.  This one 

Well I'm slowly reducing it (currently at 9900) and this is what I am 
seeing now.

Feb 10 16:47:58 krusty ntpdate[9134]: step time server 202.173.151.129 
offset -3.756325 sec
Feb 10 16:49:52 krusty ntpdate[9146]: step time server 202.173.151.129 
offset -9.375502 sec
Feb 10 16:50:01 krusty ntpdate[9153]: adjust time server 202.173.151.129 
offset -0.086756 sec
Feb 10 16:51:51 krusty ntpdate[9166]: step time server 202.173.151.129 
offset -9.705495 sec
Feb 10 16:52:02 krusty ntpdate[9172]: adjust time server 202.173.151.129 
offset -0.456918 sec

Looks quite promising, it's a lot closer than before.

> Asking the next obvious question, do you have cpufreq enabled?

Um nope.  No program found by that name although I did find cpufreq in 
the kernel modules but it isn't a loaded module according to lsmod.

There is also a cpuspeed ticked on in ntsysv so could that be an issue?

-- 
Regards,
Peter Kiem

Zordah IT - IT Consultancy and Internet Services
Ph: (0414) 724-766   Fax: (07) 3344-5827
Web: www.zordah.net  Email: zordah at zordah.net




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