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Re: [Xen-devel] VCPUOP_set_periodic_timer

On 15/11/13 13:10, Keir Fraser wrote:
You’ll have to measure to confirm, but if the core is dedicated to your vcpu then there is no reason there should be 50us jitter. Also there is not much point playing with different schedulers — if there are no other vcpus schedulable on the cpu, the scheduler can’t have multiple runnable vcpus to choose between.

 -- Keir

The deadline timer code as up to 50us of slop when calculating when to wake up and when timers expire.  It is somewhat poor, and is certainly an area in need of improvement.

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