On Sat, 30 Sep 2023 14:58:35 +0100, David Woodhouse wrote:
> Most of the time there's no need to kick the vCPU and deliver the timer
> event through kvm_xen_inject_timer_irqs(). Use kvm_xen_set_evtchn_fast()
> directly from the timer callback, and only fall back to the slow path
> when it's necessary to do so.
>
> This gives a significant improvement in timer latency testing (using
> nanosleep() for various periods and then measuring the actual time
> elapsed).
>
> [...]
Applied to kvm-x86 xen, thanks!
[1/1] KVM: x86: Use fast path for Xen timer delivery
https://github.com/kvm-x86/linux/commit/77c9b9dea4fb
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https://github.com/kvm-x86/linux/tree/next
