[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Missing guest clock-sync on Host clock change
From: |
Erik Rull |
Subject: |
[Qemu-devel] Missing guest clock-sync on Host clock change |
Date: |
Thu, 27 Mar 2014 09:41:02 +0100 |
User-agent: |
Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0 SeaMonkey/2.25 |
Hi all,
I would like to have the guest "drifting" to a new set clock on the host.
My problem is the following:
- Host System (Linux) starts up, hwclock and kernel time are synced, guest
starts up with -rtc clock=host,driftfix=slew (which I assume should fix any
drift issue on ACPI compatible guest OSes)
- Host System kernel time drifts against the hwclock (jiffies timer due to
no other available useful timer on SMP systems - core2duo has no hpet!)
- calling "hwclock -s" on the host resyncs the kernel time with the
hwclock, so "date" and "hwclock" show the same again
- the guest stays at the "old" kernel time before the sync - also after 1
hour the delta is still the same, so no sync or slew is done :-(
My guest OS is Windows 8, which must have ACPI enabled, otherwise it will
not work.
Any ideas how to proceed? Maybe some command line parameters are wrong?
I need this resync for the guest due to external synchronization - it must
not be millisecond-precise, but a 9 seconds shift during a run overnight is
too much!
Thanks.
Best regards,
Erik
- [Qemu-devel] Missing guest clock-sync on Host clock change,
Erik Rull <=