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    SubjectRE: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3
    Date
    From
    Andi,

    Can you be more specific with "it doesn't load balance threads
    aggressively enough"? Or what behavior of the base NUMA scheduler is
    missing in the sched-domain scheduler especially for NUMA?

    Jun

    >-----Original Message-----
    >From: Andi Kleen [mailto:ak@suse.de]
    >Sent: Thursday, March 25, 2004 3:47 AM
    >To: Rick Lindsley
    >Cc: Andi Kleen; Ingo Molnar; piggin@cyberone.com.au; linux-
    >kernel@vger.kernel.org; akpm@osdl.org; kernel@kolivas.org;
    >rusty@rustcorp.com.au; Nakajima, Jun; anton@samba.org; lse-
    >tech@lists.sourceforge.net; mbligh@aracnet.com
    >Subject: Re: [Lse-tech] [patch] sched-domain cleanups,
    sched-2.6.5-rc2-mm2-
    >A3
    >
    >On Thu, Mar 25, 2004 at 03:40:22AM -0800, Rick Lindsley wrote:
    >> The main problem it has is that it performs quite badly on
    Opteron
    >NUMA
    >> e.g. in the OpenMP STREAM test (much worse than the normal
    scheduler)
    >>
    >> Andi, I've got some schedstat code which may help us to understand
    why.
    >> I'll need to port it to Ingo's changes, but if I drop you a patch in
    a
    >> day or two can you try your test on sched-domain/non-sched-domain,
    >> collecting the stats?
    >
    >The openmp failure is already pretty well understood - it doesn't load
    >balance
    >threads aggressively enough over CPUs after startup.
    >
    >-Andi
    -
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