From: Ingo Molnar <mingo@elte.hu>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: Erich Focht <efocht@ess.nec.de>,
Michael Hohnbaum <hohnbaum@us.ibm.com>,
Matthew Dobson <colpatch@us.ibm.com>,
Christoph Hellwig <hch@infradead.org>,
Robert Love <rml@tech9.net>, Andrew Theurer <habanero@us.ibm.com>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
lse-tech <lse-tech@lists.sourceforge.net>,
Anton Blanchard <anton@samba.org>
Subject: Re: [patch] sched-2.5.59-A2
Date: Mon, 20 Jan 2003 18:24:07 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.44.0301201817220.12564-100000@localhost.localdomain> (raw)
In-Reply-To: <1382810000.1043082649@titus>
On Mon, 20 Jan 2003, Martin J. Bligh wrote:
> Do you have that code working already (presumably needs locking
> changes)? I seem to recall something like that existing already, but I
> don't recall if it was ever fully working or not ...
yes, i have a HT testbox and working code:
http://lwn.net/Articles/8553/
the patch is rather old, i'll update it to 2.5.59.
> I think the large PPC64 boxes have multilevel NUMA as well - two real
> phys cores on one die, sharing some cache (L2 but not L1? Anton?). And
> SGI have multilevel nodes too I think ... so we'll still need multilevel
> NUMA at some point ... but maybe not right now.
Intel's HT is the cleanest case: pure logical cores, which clearly need
special handling. Whether the other SMT solutions want to be handled via
the logical-cores code or via another level of NUMA-balancing code,
depends on benchmarking results i suspect. It will be one more flexibility
that system maintainers will have, it's all set up via the
sched_map_runqueue(cpu1, cpu2) boot-time call that 'merges' a CPU's
runqueue into another CPU's runqueue. It's basically the 0th level of
balancing, which will be fundamentally different. The other levels of
balancing are (or should be) similar to each other - only differing in
weight of balancing, not differing in the actual algorithm.
Ingo
next prev parent reply other threads:[~2003-01-20 17:11 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-09 23:54 Minature NUMA scheduler Martin J. Bligh
2003-01-10 5:36 ` [Lse-tech] " Michael Hohnbaum
2003-01-10 16:34 ` Erich Focht
2003-01-10 16:57 ` Martin J. Bligh
2003-01-12 23:35 ` Erich Focht
2003-01-12 23:55 ` NUMA scheduler 2nd approach Erich Focht
2003-01-13 8:02 ` Christoph Hellwig
2003-01-13 11:32 ` Erich Focht
2003-01-13 15:26 ` [Lse-tech] " Christoph Hellwig
2003-01-13 15:46 ` Erich Focht
2003-01-13 19:03 ` Michael Hohnbaum
2003-01-14 1:23 ` Michael Hohnbaum
2003-01-14 4:45 ` [Lse-tech] " Andrew Theurer
2003-01-14 4:56 ` Martin J. Bligh
2003-01-14 11:14 ` Erich Focht
2003-01-14 15:55 ` [PATCH 2.5.58] new NUMA scheduler Erich Focht
2003-01-14 16:07 ` [Lse-tech] " Christoph Hellwig
2003-01-14 16:23 ` [PATCH 2.5.58] new NUMA scheduler: fix Erich Focht
2003-01-14 16:43 ` Erich Focht
2003-01-14 19:02 ` Michael Hohnbaum
2003-01-14 21:56 ` [Lse-tech] " Michael Hohnbaum
2003-01-15 15:10 ` Erich Focht
2003-01-16 0:14 ` Michael Hohnbaum
2003-01-16 6:05 ` Martin J. Bligh
2003-01-16 16:47 ` Erich Focht
2003-01-16 18:07 ` Robert Love
2003-01-16 18:48 ` Martin J. Bligh
2003-01-16 19:07 ` Ingo Molnar
2003-01-16 18:59 ` Martin J. Bligh
2003-01-16 19:10 ` Christoph Hellwig
2003-01-16 19:44 ` Ingo Molnar
2003-01-16 19:43 ` Martin J. Bligh
2003-01-16 20:19 ` Ingo Molnar
2003-01-16 20:29 ` [Lse-tech] " Rick Lindsley
2003-01-16 23:31 ` Martin J. Bligh
2003-01-17 7:23 ` Ingo Molnar
2003-01-17 8:47 ` [patch] sched-2.5.59-A2 Ingo Molnar
2003-01-17 14:35 ` Erich Focht
2003-01-17 15:11 ` Ingo Molnar
2003-01-17 15:30 ` Erich Focht
2003-01-17 16:58 ` Martin J. Bligh
2003-01-18 20:54 ` NUMA sched -> pooling scheduler (inc HT) Martin J. Bligh
2003-01-18 21:34 ` [Lse-tech] " Martin J. Bligh
2003-01-19 0:13 ` Andrew Theurer
2003-01-17 18:19 ` [patch] sched-2.5.59-A2 Michael Hohnbaum
2003-01-18 7:08 ` William Lee Irwin III
2003-01-18 8:12 ` Martin J. Bligh
2003-01-18 8:16 ` William Lee Irwin III
2003-01-19 4:22 ` William Lee Irwin III
2003-01-17 17:21 ` Martin J. Bligh
2003-01-17 17:23 ` Martin J. Bligh
2003-01-17 18:11 ` Erich Focht
2003-01-17 19:04 ` Martin J. Bligh
2003-01-17 19:26 ` [Lse-tech] " Martin J. Bligh
2003-01-18 0:13 ` Michael Hohnbaum
2003-01-18 13:31 ` [patch] tunable rebalance rates for sched-2.5.59-B0 Erich Focht
2003-01-18 23:09 ` [patch] sched-2.5.59-A2 Erich Focht
2003-01-20 9:28 ` Ingo Molnar
2003-01-20 12:07 ` Erich Focht
2003-01-20 16:56 ` Ingo Molnar
2003-01-20 17:04 ` Ingo Molnar
2003-01-20 17:10 ` Martin J. Bligh
2003-01-20 17:24 ` Ingo Molnar [this message]
2003-01-20 19:13 ` Andrew Theurer
2003-01-20 19:33 ` Martin J. Bligh
2003-01-20 19:52 ` Andrew Theurer
2003-01-20 19:52 ` Martin J. Bligh
2003-01-20 21:18 ` [patch] HT scheduler, sched-2.5.59-D7 Ingo Molnar
2003-01-20 22:28 ` Andrew Morton
2003-01-21 1:11 ` Michael Hohnbaum
2003-01-22 3:15 ` Michael Hohnbaum
2003-01-22 16:41 ` Andrew Theurer
2003-01-22 16:17 ` Martin J. Bligh
2003-01-22 16:20 ` Andrew Theurer
2003-01-22 16:35 ` Michael Hohnbaum
2003-02-03 18:23 ` [patch] HT scheduler, sched-2.5.59-E2 Ingo Molnar
2003-02-03 20:47 ` Robert Love
2003-02-04 9:31 ` Erich Focht
2003-01-20 17:04 ` [patch] sched-2.5.59-A2 Martin J. Bligh
2003-01-21 17:44 ` Erich Focht
2003-01-20 16:23 ` Martin J. Bligh
2003-01-20 16:59 ` Ingo Molnar
2003-01-17 23:09 ` Matthew Dobson
2003-01-16 23:45 ` [PATCH 2.5.58] new NUMA scheduler: fix Michael Hohnbaum
2003-01-17 11:10 ` Erich Focht
2003-01-17 14:07 ` Ingo Molnar
2003-01-16 19:44 ` John Bradford
2003-01-14 16:51 ` Christoph Hellwig
2003-01-15 0:05 ` Michael Hohnbaum
2003-01-15 7:47 ` Martin J. Bligh
2003-01-14 5:50 ` [Lse-tech] Re: NUMA scheduler 2nd approach Michael Hohnbaum
2003-01-14 16:52 ` Andrew Theurer
2003-01-14 15:13 ` Erich Focht
2003-01-14 10:56 ` Erich Focht
2003-01-11 14:43 ` [Lse-tech] Minature NUMA scheduler Bill Davidsen
2003-01-12 23:24 ` Erich Focht
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