vbox clocksource time synchro problem
http://www.vr.org/knowledgebase/161/My-server-clock-or-date-and-time-is-wrong-or-drifts.html
FOR FULLY VIRTUALIZED (HVM) INSTANCES
To resolve this issue, you can change the clocksource on your system. First determine the current clocksource:
To find your current clocksource
cat /sys//devices/system/clocksource/clocksource0/current_clocksource
cat /sys/devices/system/clocksource/clocksource0/available_clocksource
or
cat /sys/devices/system/clocksource/clocksource0/*
We can see that we have jiffies, pit, and tsc available as clocksources.
To change your clocksource, append clocksource=jiffies to your grub.conf kernel line. The sample grub entry would look like this:
title CentOS (2.6.18-194.3.1.el5xen)
root (hd0,0)
kernel /vmlinuz-2.6.18-194.3.1.el5xen ro root=LABEL=/ console=xvc console=tty clocksource=jiffies
initrd /initrd-2.6.18-194.3.1.el5xen.img
Doku o synchronizacji czasu VM DOKU
Opis wielu problemów VBOX BUG tracker
page revision: 3, last edited: 14 Sep 2011 19:54