lkml.org 
[lkml]   [2006]   [Oct]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 5/5] Only call rebalance_domains when needed from scheduler_tick
    Christoph Lameter wrote:
    > On Thu, 26 Oct 2006, Nick Piggin wrote:
    >
    >
    >>>Call rebalance_domains from a tasklet with interrupt enabled.
    >>>Only call it when one of the sched domains is to be rebalanced.
    >>>The jiffies when the next balancing action is to take place is
    >>>kept in a per cpu variable next_balance.
    >>
    >>sched-domains was supposed to be able to build a whacky topology
    >>so you didn't have to take the occasional big latency hit when
    >>scanning 512 CPUs...
    >
    >
    > How is that supposed to work? The load calculations will be off
    > in that case and also the load balancing algorithm wont work anymore.
    > This is going to be a pretty significant rework of how the scheduler
    > works but given the problems with pinned tasks... maybe that is
    > necessary?
    > duler?

    What will the problem be? Sure it may pull tasks fom one group to
    another when both could actually be pulling from a third, but it
    the load balancing algorithm should work fine and not require any
    rework.

    --
    SUSE Labs, Novell Inc.
    Send instant messages to your online friends http://au.messenger.yahoo.com

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-10-26 19:15    [W:2.919 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site