From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
"Siddha, Suresh B" <suresh.b.siddha@intel.com>
Subject: Re: [patch 3/5] sched: multilevel sbe and sbf
Date: Wed, 06 Apr 2005 17:53:57 +1000 [thread overview]
Message-ID: <42539595.6050509@yahoo.com.au> (raw)
In-Reply-To: <20050406055409.GA5973@elte.hu>
Ingo Molnar wrote:
> Acked-by: Ingo Molnar <mingo@elte.hu>
>
> note that no matter how much scheduler logic, in the end
> cross-scheduling of tasks between nodes on NUMA will always have a
> permanent penalty (i.e. the 'migration cost' is 'infinity' in the long
> run), so the primary focus _hast to be_ on 'get it right initially' When
> tasks must spill over to other nodes will always remain a special case.
> So balance-on-fork/exec/[clone] definitely needs to be aware of the full
> domain tree picture.
>
Yes, well put. I imagine this will only become more important as
there becomes more push towards multiprocessing machines, and the
need for higher memory bandwidth and lower latency to CPUs.
--
SUSE Labs, Novell Inc.
next prev parent reply other threads:[~2005-04-06 7:56 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-05 23:44 [patch 1/5] sched: remove degenerate domains Nick Piggin
2005-04-05 23:45 ` [patch 2/5] sched: NULL domains Nick Piggin
2005-04-05 23:46 ` [patch 3/5] sched: multilevel sbe and sbf Nick Piggin
2005-04-05 23:47 ` [patch 4/5] sched: RCU sched domains Nick Piggin
2005-04-05 23:49 ` [patch 5/5] sched: consolidate sbe sbf Nick Piggin
2005-04-06 6:27 ` Ingo Molnar
2005-04-06 8:09 ` Nick Piggin
2005-04-06 8:16 ` Nick Piggin
2005-04-07 7:17 ` Ingo Molnar
2005-04-07 7:15 ` Ingo Molnar
2005-04-06 6:18 ` [patch 4/5] sched: RCU sched domains Ingo Molnar
2005-04-06 8:01 ` Nick Piggin
2005-04-07 7:11 ` Ingo Molnar
2005-04-07 7:58 ` Nick Piggin
2005-04-11 22:15 ` Paul E. McKenney
2005-04-12 0:03 ` Nick Piggin
2005-04-06 5:54 ` [patch 3/5] sched: multilevel sbe and sbf Ingo Molnar
2005-04-06 7:53 ` Nick Piggin [this message]
2005-04-06 5:45 ` [patch 2/5] sched: NULL domains Ingo Molnar
2005-04-06 5:48 ` Ingo Molnar
2005-04-06 7:51 ` Nick Piggin
2005-04-06 5:44 ` [patch 1/5] sched: remove degenerate domains Ingo Molnar
2005-04-06 7:10 ` Siddha, Suresh B
2005-04-06 7:13 ` Ingo Molnar
2005-04-06 8:12 ` Nick Piggin
2005-04-06 7:49 ` Nick Piggin
2005-04-07 7:00 ` Ingo Molnar
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