Package: ntp
Version: 1:4.2.4p4+dfsg-8lenny2
Severity: normal
This is taking place on Xen dom0, not domU. (The name of the server --
the Xen host -- is "virtual1".) As far as I understand, ntp should work
normally on dom0.
I have no actual evidence that ntp is synchronizing the clock at all.
Although wall time (from "date") is quite accurate as well as I can
visually estimate, the "maximum error" and "estimated error" reported
from "ntpdc -c kerninfo" are what would be seen when the ntp server is
totally unsynchronized:
virtual1:~$ date
Sat Dec 5 14:35:06 EST 2009
virtual1:~$ ntpdc -c kerninfo
pll offset: 0 s
pll frequency: 0.690 ppm
maximum error: 16 s
estimated error: 16 s
status: 0041 pll unsync
pll time constant: 6
precision: 1e-06 s
frequency tolerance: 500 ppm
virtual1:~$ date
Sat Dec 5 14:35:12 EST 2009
Although "ntpdc -c sysinfo" indicates kernel sync, "reference time" can
be a number of seconds off; this could be a Xen issue but I don't know:
virtual1:~$ date
Sat Dec 5 14:36:54 EST 2009
virtual1:~$ ntpdc -c sysinfo
system peer: navobs1.gatech.edu
system peer mode: client
leap indicator: 00
stratum: 2
precision: -20
root distance: 0.02779 s
root dispersion: 0.04031 s
reference ID: [130.207.244.240]
reference time: cec534c9.702c7f40 Sat, Dec 5 2009 14:36:41.438
system flags: auth monitor ntp kernel stats
jitter: 0.007736 s
stability: 0.000 ppm
broadcastdelay: 0.003998 s
authdelay: 0.000007 s
virtual1:~$ date
Sat Dec 5 14:36:57 EST 2009
Offsets reported against known good servers; the last four are just
random selections from the Debian pool:
virtual1:~$ date
Sat Dec 5 14:40:15 EST 2009
virtual1:~$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
ns.intap.net .STEP. 16 u - 64 0 0.000 0.000 0.000
NAVOBS1.MIT.EDU .STEP. 16 u - 1024 0 0.000 0.000 0.000
+navobs1.wustl.e .GPS. 1 u 20 64 377 30.794 38.355 4.201
*navobs1.gatech. .FLY. 1 u 19 64 377 27.873 35.955 3.669
+time-a.nist.gov .ACTS. 1 u 41 64 357 36.943 47.231 7.671
xis.phreaki.com 64.6.144.6 3 u 43 64 377 6.465 -11.939 305.046
-mustang.empire. 192.5.41.209 2 u 16 64 377 14.839 26.922 3.860
-66-96-98-9.ccup 204.9.54.119 2 u 26 64 377 36.962 21.800 5.750
-64.73.32.134 7.8.171.182 2 u 18 64 377 39.925 47.031 6.542
virtual1:~$ date
Sat Dec 5 14:40:17 EST 2009
There are four identical CPU cores shown in /proc/cpuinfo; here is 0:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 1
cpu MHz : 2793.140
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx
fxsr sse sse2 ss ht nx constant_tsc pni cid
bogomips : 5591.23
clflush size : 64
power management:
-- System Information:
Debian Release: 5.0.3
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-2-xen-686 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages ntp depends on:
ii adduser 3.110 add and remove users and groups
ii libc6 2.7-18 GNU C Library: Shared libraries
ii libcap1 1:1.10-14 support for getting/setting POSIX.
ii libedit2 2.11~20080614-1 BSD editline and history libraries
ii libncurses5 5.7+20081213-1 shared libraries for terminal hand
ii libssl0.9.8 0.9.8g-15+lenny5 SSL shared libraries
ii lsb-base 3.2-20 Linux Standard Base 3.2 init scrip
ii netbase 4.34 Basic TCP/IP networking system
Versions of packages ntp recommends:
ii perl 5.10.0-19lenny2 Larry Wall's Practical Extraction
Versions of packages ntp suggests:
pn ntp-doc<none> (no description available)
-- no debconf information
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