Messages in this thread | | | Date | Fri, 12 Jan 2007 00:34:34 -0500 | From | Rik van Riel <> | Subject | Re: kvm & dyntick |
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Avi Kivity wrote:
> dyntick-enabled guest: > - reduce the load on the host when the guest is idling > (currently an idle guest consumes a few percent cpu)
You do not need dynticks for this actually. Simple no-tick-on-idle like Xen has works well enough.
While you're modifying the timer code, you might also want to add proper accounting for steal time. Time during which your guest had a runnable process, but was not actually running itself, should not be accounted against the currently running process.
I wonder if it would be possible to simply copy some of the timer code from Xen. They have the timing quirks worked out very well and their timer_interrupt() is pretty nice code.
(Now I need to buy myself another VT box so I can help out with KVM :))
http://virt.kernelnewbies.org/ParavirtBenefits has some other features you may want to have :)))
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