Thanks for the help. Can anyone give me the firmware patch number to make sure I have the right one?
Thanks again, Greer On 4/13/08, Kevin Rathbun <Kevin.Rathbun at sun.com> wrote: > > On Sun, Apr 13, 2008 at 03:05:49PM -0400, Steffen Weiberle wrote: > > Greer Reichow wrote: > > > All, > > > I've come across aan interesting problem I'm hoping someone has seen > > > > > > I have the following in a development environment: > > > 1)T2000 - 8 core, 32GB RAM > > > 2)T5120 - 8 core, 32GB RAM > > > 3)Symmetricom S250 GPS NTP Server > > > > > > Both the T2k & 5120 are built off the same jumpstart images (solaris > 08/07) with ~ 4 ldoms each. Each LDOM is configured with 4CPUs and 2 GB > RAM. We are running ntp client version 4.2.4 downloaded from > sunfreeware.com. LDOM level is 1.0.1 currently > > > > > > Each LDOM on both machines is running the same ntp.conf file: > > > server <ip> minpoll 4 maxpoll 4 prefer > > > driftfile /var/ntp/ntp.drift > > > > > > While I know this wouldn't be ideal in a large deployment, the fact > that I have a private DNS stratum 1 server and few clients allows me to set > the time polling fairly tight. > > > > > > Here is the interesting part: > > > Results of ntpq -c peers > > > > > > 5120: > > > delay offset disp > > > .061 37.037 0.12 > > > > > > T2000: > > > delay offset disp > > > .062 .04 0.14 > > > > > > Why am I getting such disparate results in offset? The project I'm > developing this for has very strict timing requirements that the T2000 seems > to meet (< 10ms accuracy) that the newer 5120 doesn't meet. Has anyone seen > something similar? Right now this is pointing at a hardware issue, but I > want to eliminate the ldom code as a problem > > > > There are clock drifts on the systems that are greater than what NTP can > > handle. Came across this myself just last week. > > > > There are /etc/system settings described in Change Request 6630235 based > > on CPU clock frequency. > > > > I am looking for a public document that describes these. > > > Not sure about a public doc but here's other info. > > 6682970 Clock drift on N2 platforms (Glendale, Monza & Turgo) due to > spread spectrum > 6676309 Clock drift in Huron due to spread spectrum > > http://blogs.sun.com/blu/entry/spread_spectrum_emi_and_the > > kvn > > > > > > > Steffen > > > > > Thanks, > > > Greer > > > -- > > > This message was posted from opensolaris.org > > > _______________________________________________ > > > ldoms-discuss mailing list > > > ldoms-discuss at opensolaris.org > > > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > > _______________________________________________ > > ldoms-discuss mailing list > > ldoms-discuss at opensolaris.org > > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/ldoms-discuss/attachments/20080414/93abefd5/attachment.html>
