lkml.org 
[lkml]   [2012]   [Jun]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [tip:sched/core] x86/numa: Allow specifying node_distance() for numa=fake

    * David Rientjes <rientjes@google.com> wrote:

    > On Wed, 9 May 2012, tip-bot for Peter Zijlstra wrote:
    >
    > > Commit-ID: 94c0dd3278dd3eae52eabf0fb77d472d0dd3e373
    > > Gitweb: http://git.kernel.org/tip/94c0dd3278dd3eae52eabf0fb77d472d0dd3e373
    > > Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
    > > AuthorDate: Wed, 18 Apr 2012 19:04:17 +0200
    > > Committer: Ingo Molnar <mingo@kernel.org>
    > > CommitDate: Wed, 9 May 2012 13:28:59 +0200
    > >
    > > x86/numa: Allow specifying node_distance() for numa=fake
    > >
    > > Allows emulating more interesting NUMA configurations like a quad
    > > socket AMD Magny-Cour:
    > >
    > > "numa=fake=8:10,16,16,22,16,22,16,22,
    > > 16,10,22,16,22,16,22,16,
    > > 16,22,10,16,16,22,16,22,
    > > 22,16,16,10,22,16,22,16,
    > > 16,22,16,22,10,16,16,22,
    > > 22,16,22,16,16,10,22,16,
    > > 16,22,16,22,16,22,10,16,
    > > 22,16,22,16,22,16,16,10"
    > >
    > > Which has a non-fully-connected topology.
    > >
    >
    > I like this support and I'm pretty sure you used it to
    > reproduce my problems with sched/numa locally, but I think it
    > would be better to seperate it out as a different parameter
    > such as slit=fake so that we can still use it to fake the SLIT
    > of our NUMA machines without requiring numa=fake which
    > provides no guarantees to break the nodes along physical
    > boundaries.
    >
    > So without seperating it out into slit=fake, we can't change
    > this information without changing the SLIT itself and that
    > makes debugging harder.

    Makes sense - wanna send a patch?

    Thanks,

    Ingo


    \
     
     \ /
      Last update: 2012-06-06 10:01    [W:0.024 / U:97.564 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site