lkml.org 
[lkml]   [2010]   [Mar]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH 0/18][RFC] Nested Paging support for Nested SVM (aka NPT-Virtualization)
    From
    Date

    On 03.03.2010, at 20:12, Joerg Roedel wrote:

    > Hi,
    >
    > here are the patches that implement nested paging support for nested
    > svm. They are somewhat intrusive to the soft-mmu so I post them as RFC
    > in the first round to get feedback about the general direction of the
    > changes. Nevertheless I am proud to report that with these patches the
    > famous kernel-compile benchmark runs only 4% slower in the l2 guest as
    > in the l1 guest when l2 is single-processor. With SMP guests the
    > situation is very different. The more vcpus the guest has the more is
    > the performance drop from l1 to l2.
    > Anyway, this post is to get feedback about the overall concept of these
    > patches. Please review and give feedback :-)

    Nice job! It's great to see you finally got around to it :-).

    Have you tracked what slows down SMP l2 guests yet? So far I've been assuming that IPIs just completely kill the performance, but I guess it shouldn't be that bad, especially now where you have sped up the #VMEXIT path that much.


    Alex

    \
     
     \ /
      Last update: 2010-03-04 00:47    [W:4.105 / U:0.096 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site