Additional parameters may be needed in the boot loader
(grub.conf
) configuration file for certain
operating system variants after the guest is installed.
Specifically, for optimal clock accuracy, Linux guest boot
parameters should be specified to ensure that the
pit clock source is utilized. Adding
clock=pit nohpet nopmtimer
for most guest
will result in the selection of pit as the
clock source for the guest. Published templates for
Oracle VM include these additional parameters.
Proper maintenance of virtual time can be tricky. The various
parameters provide tuning for virtual time management and
supplement, but do not replace, the need for an
ntp time service running within guest.
Ensure that the ntpd
service is running and
that the /etc/ntp.conf
configuration file
is pointing to valid time servers.