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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the best in the world, and those who believe it already is. Each group
calls the other unpatriotic.
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