Novell XEN - ADMINISTRATION Manual page 20

NOTE: Time Services on Virtual Guests
Hardware clocks commonly are not very precise. All modern operating systems
try to correct the system time compared to the hardware time by means of an
additional time source. To get the correct time on all VM Guest systems, also
activate the network time services on each respective guest or make sure that
the guest uses the system time of the host. For more about Independent
Wallclocks in SUSE Linux Enterprise Server see
Clock Settings"
For more information about managing virtual machines, see
Virtualization Environment
14 Virtualization with Xen
(page 67).
(page 27).
Section 6.3.4, "Virtual Machine
Chapter 4, Managing a