Re: [PATCH 0/5] kvm: memslots lookup optimization

Igor Mammedov
2014-12-02T07:59:59Z

On Mon, 01 Dec 2014 18:38:34 +0100
Paolo Bonzini <pbonzini@redhat.com> wrote:

>
>
> On 01/12/2014 18:29, Igor Mammedov wrote:
> > Series speed-ups GFN to memslot lookup time by:
> > * introducing LRU cache, which improves looukup time for
> > same slot workload (typically boot time of Windows and Linux guest)
> > * switching to binary search for GFN to memslot lookup,
> > improving lookup time with large amount of memory slots
> >
> > Igor Mammedov (5):
> > kvm: update_memslots: drop not needed check for the same number of
> > pages
> > kvm: update_memslots: drop not needed check for the same slot
> > kvm: search_memslots: add simple LRU memslot caching
> > kvm: change memslot sorting rule from size to GFN
> > kvm: optimize GFN to memslot lookup with large slots amount
> >
> > include/linux/kvm_host.h | 28 +++++++++++++++++++++++-----
> > virt/kvm/kvm_main.c | 46 ++++++++++++++++++++++++++--------------------
> > 2 files changed, 49 insertions(+), 25 deletions(-)
> >
>
> Applied patches 1-3 for now, I'm not in the mood for proving that the
> binary search is correct. :)
Following write up could help with improving a proving mood :)
http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=binarySearch

>
> Paolo