Topic: SME 7.3 under Xen ( centos ) - clock drift

[pietdejong]

Hi Everyone, I have just installed SME 7.3 under Xen.
I noticed that the clock under Xen drifts about 5 minutes behind over a 24 hour period.

SME has been installed fully virtualized from the CD, latest updates installed.

I noticed that there is a divider option which is supposed to fix this problem for DomU domains, but this would not apply to SME 7.3 since this is based on Centos 4.5(?)


Details for Dom0:
===============================================
#uname -a
Linux smeserver 2.6.9-67.0.1.EL #1 Wed Dec 19 15:50:25 EST 2007 i686 i686 i386 GNU/Linux


Xen config file for sme:
name = "sme"
uuid = "2628a9e7-418b-84cb-dd19-6aed952957a0"
maxmem = 1024
memory = 1024
vcpus = 1
builder = "hvm"
kernel = "/usr/lib/xen/boot/hvmloader"
boot = "c"
pae = 1
acpi = 1
apic = 1
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
device_model = "/usr/lib64/xen/bin/qemu-dm"
sdl = 0
vnc = 1
vncunused = 1
keymap = "en-us"
disk = [ "file:/var/lib/xen/images/sme.img,hda,w" ]
vif = [ "mac=00:16:3e:40:b5:26,bridge=xenbr0,type=ioemu" ]
serial = "pty"

Details for Dom0:
===============================================
# rpm -qa | grep xen
xen-libs-3.0.3-41.el5
xen-libs-3.0.3-41.el5
kernel-xen-2.6.18-8.el5
xen-3.0.3-41.el5
kernel-xen-2.6.18-53.1.4.el5

# uname -a
Linux intel1 2.6.18-53.1.4.el5xen #1 SMP Fri Nov 30 01:21:23 EST 2007 x86_64 x86_64 x86_64 GNU/Linux

Does anyone have this problem as well ?
My next option would be to re-install SME as a paravirtual machine and not fully virtual, as explained slords:
http://forums.contribs.org/index.php?topic=38802.msg176362#msg176362

Many thanks.

[mmccarn]

Here is a discussion of time drift under VMWare - maybe part of this will be useful in your situation: http://forums.contribs.org/index.php?topic=32139.0

[pietdejong]

so far so good, much better, still 5 seconds drift over the last 10 hours