On Tue, 17 May 2016 10:49:22 +0200
Christian Borntraeger <borntraeger@xxxxxxxxxx> wrote:
> commit 3491caf2755e ("KVM: halt_polling: provide a way to qualify
> wakeups during poll") added more aggressive shrinking of the
> polling interval if the wakeup did not match some criteria. This
> still allows to keep polling enabled if the polling time was
> smaller that the current max poll time (block_ns <= vcpu->halt_poll_ns).
> Performance measurement shows that even more aggressive shrinking
> (shrink polling on any invalid wakeup) reduces absolute and relative
> (to the workload) CPU usage even further.
>
> Cc: David Matlack <dmatlack@xxxxxxxxxx>
> Cc: Wanpeng Li <kernellwp@xxxxxxxxx>
> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx>
> CC: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> CC: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
> virt/kvm/kvm_main.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
Acked-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
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