On Tue, May 18, 2021, Wanpeng Li wrote: > From: Wanpeng Li <wanpengli@xxxxxxxxxxx> > > Let's treat lapic_timer_advance_ns automatic tuning logic as hypervisor > overhead, move it before wait_lapic_expire instead of between wait_lapic_expire > and the world switch, the wait duration should be calculated by the > up-to-date guest_tsc after the overhead of automatic tuning logic. This > patch reduces ~30+ cycles for kvm-unit-tests/tscdeadline-latency when testing > busy waits. > > Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> > --- Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
