[ntp:questions] Frequency Error on Sun4v

Conan fj879 at ncf.ca
Thu Jun 19 17:50:45 UTC 2008

We are testing Solaris 10 images on a variety of hardware.  We discovered a 
problem which seems to only appear on T5120 (Sun4V architecture) and darned 
if I can figure out why.

Every 7 - 12 minutes I get these log entries
19 Jun 09:41:41 ntpd[21419]: system event 'event_peer/strat_chg' (0x04) 
status 'sync_alarm, sync_ntp, 15 events,event_clock_reset' (0xc6f5)
19 Jun 09:41:41 ntpd[21419]: synchronized to 47.xxx.yyy.zzz, stratum 2
19 Jun 09:41:41 ntpd[21419]: frequency error 512 PPM exceeds tolerance 500 
19 Jun 09:41:41 ntpd[21419]: system event 'event_sync_chg' (0x03) status 
'leap_none, sync_ntp, 15 events, event_peer/strat_chg' (0x6f4)
19 Jun 09:41:41 ntpd[21419]: system event 'event_peer/strat_chg' (0x04) 
status 'leap_none, sync_ntp, 15 events, event_sync_chg' (0x6f3)

Drift file is pegged at 500.000

#  ntpq -c rv
assID=0 status=06f4 leap_none, sync_ntp, 15 events, event_peer/strat_chg,
version="ntpd 4.2.4p4 at 1.1520-o Wed Jun 18 14:32:44 EDT 2008 (2)",
processor="sun4v", system="SunOS/5.10", leap=00, stratum=3,
precision=-21, rootdelay=2.758, rootdispersion=951.915, peer=15662,
reftime=cc0515c0.4664ede2  Thu, Jun 19 2008 13:28:32.274, poll=6,
clock=cc0515e5.eae3cd9e  Thu, Jun 19 2008 13:29:09.917, state=4,
offset=836.968, frequency=500.000, jitter=90.088, noise=217.608,
stability=83.496, tai=0

# cat ntp.conf
# Server statements, of higher level strata NTP servers.
server ntp-ott-1.ca.nortel.com
server ntp-ott-2.ca.nortel.com
server ntp-ott-3.ca.nortel.com
# - Driftfile
driftfile /etc/inet/ntpd.drift
# - Logging options
logconfig all
logfile /var/adm/ntpd.log
# Access Control:
# o Defaut action: Don't trust anyone for time and modifications.
restrict default nomodify nopeer
# o Completely trust your own machine
restrict 47.aaa.bbb.ccc   # Restrict local host
restrict   # Local host loopback

I would be very appreciative if someone can help me identify the cause of 
the problem and suggest a solution.


More information about the questions mailing list