On 08/03/2009 11:11 AM, Antoine Martin wrote:
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Hi,
Dor Laor wrote:
On 08/03/2009 04:52 AM, Kent Tong wrote:
Hi,
It seems to be an unsettled issue, but, would any kind soul suggest
the current
best practice for setting the clock in Ubuntu Linux and Windows guests?
For Linux the best source clock is the kvm pv clock (exist from 2.6.27
and above).
# qemu-system-x86_64 -clock ?
Available alarm timers, in order of precedence:
dynticks
hpet
rtc
unix
I see no "pv clock"...
Which one should I use then?
Did I miss a ./configure or .config option?
No, we were talking about different clocks.
I was explaining the guest source clock while you wanted some info for
the host-qemu clock.
You can use the default - dynticks. hpet and rtc might be good if you
need a fine grain granularity on older < 2.6.24 host kernels.
Cheers
Antoine
For windows, standard acpi HAL uses the rtc clock by default. As long as
you use the -rtc-td-hack it won't drift.
When the tsc is not stable on the host or the host cpu might get into
deep sleep state (c2), you better use another source clock in the guest
- for windows it should be the pmtimer (using the boot.ini).
Thanks!
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