lkml.org 
[lkml]   [2012]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC][PATCH 14/26] sched, numa: Numa balancer
    On 07/13/2012 10:45 AM, Don Morris wrote:

    >> IIRC the test consisted of a 16GB NUMA system with two 8GB nodes.
    >> It was running 3 KVM guests, two guests of 3GB memory each, and
    >> one guest of 6GB each.
    >
    > How many cpus per guest (host threads) and how many physical/logical
    > cpus per node on the host? Any comparisons with a situation where
    > the memory would fit within nodes but the scheduling load would
    > be too high?

    IIRC this particular test was constructed to have guests
    A and B fit in one NUMA node, with guest C in the other
    NUMA node.

    With schednuma, guest A ended up on one NUMA node, guest
    B on the other, and guest C was spread between both nodes.

    Only migrating when there is plenty of free space available
    means you can end up not doing the right thing when running
    a few large workloads on the system.

    --
    All rights reversed


    \
     
     \ /
      Last update: 2012-07-14 19:01    [W:3.696 / U:0.132 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site