RE: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3

Nakajima, Jun
2004-03-25T15:16:31Z

We have found some performance regressions (e.g. SPECjbb) with the
scheduler on a large IA-64 NUMA machine, and we are debugging it. On SMP
machines, we haven't seen performance regressions.

Jun

>-----Original Message-----
>From: Andi Kleen [mailto:ak@suse.de]
>Sent: Wednesday, March 24, 2004 8:56 PM
>To: Ingo Molnar
>Cc: piggin@cyberone.com.au; linux-kernel@vger.kernel.org;
akpm@osdl.org;
>kernel@kolivas.org; rusty@rustcorp.com.au; Nakajima, Jun;
>ricklind@us.ibm.com; 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, 25 Mar 2004 09:28:09 +0100
>Ingo Molnar <mingo@elte.hu> wrote:
>
>> i've reviewed the sched-domains balancing patches for upstream
inclusion
>> and they look mostly fine.
>
>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