From: Andrea Arcangeli <aarcange@redhat.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Avi Kivity <avi@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Paul Turner <pjt@google.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Mike Galbraith <efault@gmx.de>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
Dan Smith <danms@us.ibm.com>,
Bharata B Rao <bharata.rao@gmail.com>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC][PATCH 00/26] sched/numa
Date: Mon, 19 Mar 2012 15:34:42 +0100 [thread overview]
Message-ID: <20120319143442.GR24602@redhat.com> (raw)
In-Reply-To: <1332166079.18960.342.camel@twins>
On Mon, Mar 19, 2012 at 03:07:59PM +0100, Peter Zijlstra wrote:
> And no, I really don't think giving up 0.5% of RAM is acceptable.
Fine it's up to you :).
Also note 16 bytes of those 24 bytes, you need to spend them too if
you remotely hope to perform as good as AutoNUMA (I can already tell
you...), they've absolutely nothing to do with the background scanning
that AutoNUMA does to avoid modifying the apps.
The blame on autonuma you can give is 8 bytes per page only, so 0.07%,
which I can probably reduce 0.03% if I screw the natural alignment of
the list pointers and MAX_NUMNODES is < 32768 at build time, not sure
if it's worth it.
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <aarcange@redhat.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Avi Kivity <avi@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Paul Turner <pjt@google.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Mike Galbraith <efault@gmx.de>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
Dan Smith <danms@us.ibm.com>,
Bharata B Rao <bharata.rao@gmail.com>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC][PATCH 00/26] sched/numa
Date: Mon, 19 Mar 2012 15:34:42 +0100 [thread overview]
Message-ID: <20120319143442.GR24602@redhat.com> (raw)
In-Reply-To: <1332166079.18960.342.camel@twins>
On Mon, Mar 19, 2012 at 03:07:59PM +0100, Peter Zijlstra wrote:
> And no, I really don't think giving up 0.5% of RAM is acceptable.
Fine it's up to you :).
Also note 16 bytes of those 24 bytes, you need to spend them too if
you remotely hope to perform as good as AutoNUMA (I can already tell
you...), they've absolutely nothing to do with the background scanning
that AutoNUMA does to avoid modifying the apps.
The blame on autonuma you can give is 8 bytes per page only, so 0.07%,
which I can probably reduce 0.03% if I screw the natural alignment of
the list pointers and MAX_NUMNODES is < 32768 at build time, not sure
if it's worth it.
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next prev parent reply other threads:[~2012-03-19 14:35 UTC|newest]
Thread overview: 304+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-16 14:40 [RFC][PATCH 00/26] sched/numa Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 01/26] mm, mpol: Re-implement check_*_range() using walk_page_range() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 02/26] mm, mpol: Remove NUMA_INTERLEAVE_HIT Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-07-06 10:32 ` Johannes Weiner
2012-07-06 10:32 ` Johannes Weiner
2012-07-06 13:46 ` [tip:sched/core] mm: Fix vmstat names-values off-by-one tip-bot for Johannes Weiner
2012-07-06 14:48 ` [RFC][PATCH 02/26] mm, mpol: Remove NUMA_INTERLEAVE_HIT Minchan Kim
2012-07-06 14:48 ` Minchan Kim
2012-07-06 15:02 ` Peter Zijlstra
2012-07-06 15:02 ` Peter Zijlstra
2012-07-06 14:54 ` Kyungmin Park
2012-07-06 14:54 ` Kyungmin Park
2012-07-06 15:00 ` Peter Zijlstra
2012-07-06 15:00 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 03/26] mm, mpol: add MPOL_MF_LAZY Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-23 11:50 ` Mel Gorman
2012-03-23 11:50 ` Mel Gorman
2012-07-06 16:38 ` Rik van Riel
2012-07-06 16:38 ` Rik van Riel
2012-07-06 20:04 ` Lee Schermerhorn
2012-07-06 20:04 ` Lee Schermerhorn
2012-07-06 20:27 ` Rik van Riel
2012-07-06 20:27 ` Rik van Riel
2012-07-09 11:48 ` Peter Zijlstra
2012-07-09 11:48 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 04/26] mm, mpol: add MPOL_MF_NOOP Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-07-06 18:40 ` Rik van Riel
2012-07-06 18:40 ` Rik van Riel
2012-03-16 14:40 ` [RFC][PATCH 05/26] mm, mpol: Check for misplaced page Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 06/26] mm: Migrate " Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-04-03 17:32 ` Dan Smith
2012-04-03 17:32 ` Dan Smith
2012-03-16 14:40 ` [RFC][PATCH 07/26] mm: Handle misplaced anon pages Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 08/26] mm, mpol: Simplify do_mbind() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 09/26] sched, mm: Introduce tsk_home_node() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 10/26] mm, mpol: Make mempolicy home-node aware Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 18:34 ` Christoph Lameter
2012-03-16 18:34 ` Christoph Lameter
2012-03-16 21:12 ` Peter Zijlstra
2012-03-16 21:12 ` Peter Zijlstra
2012-03-19 13:53 ` Christoph Lameter
2012-03-19 13:53 ` Christoph Lameter
2012-03-19 14:05 ` Peter Zijlstra
2012-03-19 14:05 ` Peter Zijlstra
2012-03-19 15:16 ` Christoph Lameter
2012-03-19 15:16 ` Christoph Lameter
2012-03-19 15:23 ` Peter Zijlstra
2012-03-19 15:23 ` Peter Zijlstra
2012-03-19 15:31 ` Christoph Lameter
2012-03-19 15:31 ` Christoph Lameter
2012-03-19 17:09 ` Peter Zijlstra
2012-03-19 17:09 ` Peter Zijlstra
2012-03-19 17:28 ` Peter Zijlstra
2012-03-19 17:28 ` Peter Zijlstra
2012-03-19 19:06 ` Christoph Lameter
2012-03-19 19:06 ` Christoph Lameter
2012-03-19 20:28 ` Lee Schermerhorn
2012-03-19 20:28 ` Lee Schermerhorn
2012-03-19 21:21 ` Peter Zijlstra
2012-03-19 21:21 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 11/26] mm, mpol: Lazy migrate a process/vma Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 12/26] sched, mm: sched_{fork,exec} node assignment Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-06-15 18:16 ` Tony Luck
2012-06-15 18:16 ` Tony Luck
2012-06-20 19:12 ` [PATCH] sched: Fix build problems when CONFIG_NUMA=y and CONFIG_SMP=n Luck, Tony
2012-06-20 19:12 ` Luck, Tony
2012-03-16 14:40 ` [RFC][PATCH 13/26] sched: Implement home-node awareness Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 14/26] sched, numa: Numa balancer Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-07-07 18:26 ` Rik van Riel
2012-07-07 18:26 ` Rik van Riel
2012-07-09 12:05 ` Peter Zijlstra
2012-07-09 12:05 ` Peter Zijlstra
2012-07-09 12:23 ` Peter Zijlstra
2012-07-09 12:23 ` Peter Zijlstra
2012-07-09 12:40 ` Peter Zijlstra
2012-07-09 12:40 ` Peter Zijlstra
2012-07-09 14:50 ` Rik van Riel
2012-07-09 14:50 ` Rik van Riel
2012-07-08 18:35 ` Rik van Riel
2012-07-08 18:35 ` Rik van Riel
2012-07-09 12:25 ` Peter Zijlstra
2012-07-09 12:25 ` Peter Zijlstra
2012-07-09 14:54 ` Rik van Riel
2012-07-09 14:54 ` Rik van Riel
2012-07-12 22:02 ` Rik van Riel
2012-07-12 22:02 ` Rik van Riel
2012-07-13 14:45 ` Don Morris
2012-07-13 14:45 ` Don Morris
2012-07-14 16:20 ` Rik van Riel
2012-07-14 16:20 ` Rik van Riel
2012-03-16 14:40 ` [RFC][PATCH 15/26] sched, numa: Implement hotplug hooks Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-19 12:16 ` Srivatsa S. Bhat
2012-03-19 12:16 ` Srivatsa S. Bhat
2012-03-19 12:19 ` Peter Zijlstra
2012-03-19 12:19 ` Peter Zijlstra
2012-03-19 12:27 ` Srivatsa S. Bhat
2012-03-19 12:27 ` Srivatsa S. Bhat
2012-03-16 14:40 ` [RFC][PATCH 16/26] sched, numa: Abstract the numa_entity Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 17/26] srcu: revert1 Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 18/26] srcu: revert2 Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 19/26] srcu: Implement call_srcu() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 20/26] mm, mpol: Introduce vma_dup_policy() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 21/26] mm, mpol: Introduce vma_put_policy() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 22/26] mm, mpol: Split and explose some mempolicy functions Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 23/26] sched, numa: Introduce sys_numa_{t,m}bind() Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 24/26] mm, mpol: Implement numa_group RSS accounting Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 25/26] sched, numa: Only migrate long-running entities Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-07-08 18:34 ` Rik van Riel
2012-07-08 18:34 ` Rik van Riel
2012-07-09 12:26 ` Peter Zijlstra
2012-07-09 12:26 ` Peter Zijlstra
2012-07-09 14:53 ` Rik van Riel
2012-07-09 14:53 ` Rik van Riel
2012-07-09 14:55 ` Peter Zijlstra
2012-07-09 14:55 ` Peter Zijlstra
2012-03-16 14:40 ` [RFC][PATCH 26/26] sched, numa: A few debug bits Peter Zijlstra
2012-03-16 14:40 ` Peter Zijlstra
2012-03-16 18:25 ` [RFC] AutoNUMA alpha6 Andrea Arcangeli
2012-03-16 18:25 ` Andrea Arcangeli
2012-03-19 18:47 ` Peter Zijlstra
2012-03-19 18:47 ` Peter Zijlstra
2012-03-19 19:02 ` Andrea Arcangeli
2012-03-19 19:02 ` Andrea Arcangeli
2012-03-20 23:41 ` Dan Smith
2012-03-20 23:41 ` Dan Smith
2012-03-21 1:00 ` Andrea Arcangeli
2012-03-21 1:00 ` Andrea Arcangeli
2012-03-21 2:12 ` Andrea Arcangeli
2012-03-21 2:12 ` Andrea Arcangeli
2012-03-21 4:01 ` Dan Smith
2012-03-21 4:01 ` Dan Smith
2012-03-21 12:49 ` Andrea Arcangeli
2012-03-21 12:49 ` Andrea Arcangeli
2012-03-21 22:05 ` Dan Smith
2012-03-21 22:05 ` Dan Smith
2012-03-21 22:52 ` Andrea Arcangeli
2012-03-21 22:52 ` Andrea Arcangeli
2012-03-21 23:13 ` Dan Smith
2012-03-21 23:13 ` Dan Smith
2012-03-21 23:41 ` Andrea Arcangeli
2012-03-21 23:41 ` Andrea Arcangeli
2012-03-22 0:17 ` Andrea Arcangeli
2012-03-22 0:17 ` Andrea Arcangeli
2012-03-22 13:58 ` Dan Smith
2012-03-22 13:58 ` Dan Smith
2012-03-22 14:27 ` Andrea Arcangeli
2012-03-22 18:49 ` Andrea Arcangeli
2012-03-22 18:49 ` Andrea Arcangeli
2012-03-22 18:56 ` Dan Smith
2012-03-22 18:56 ` Dan Smith
2012-03-22 19:11 ` Andrea Arcangeli
2012-03-22 19:11 ` Andrea Arcangeli
2012-03-23 14:15 ` Andrew Theurer
2012-03-23 14:15 ` Andrew Theurer
2012-03-23 16:01 ` Andrea Arcangeli
2012-03-23 16:01 ` Andrea Arcangeli
2012-03-25 13:30 ` Andrea Arcangeli
2012-03-25 13:30 ` Andrea Arcangeli
2012-03-21 7:12 ` Ingo Molnar
2012-03-21 7:12 ` Ingo Molnar
2012-03-21 12:08 ` Andrea Arcangeli
2012-03-21 12:08 ` Andrea Arcangeli
2012-03-21 7:53 ` Ingo Molnar
2012-03-21 7:53 ` Ingo Molnar
2012-03-21 12:17 ` Andrea Arcangeli
2012-03-21 12:17 ` Andrea Arcangeli
2012-03-19 9:57 ` [RFC][PATCH 00/26] sched/numa Avi Kivity
2012-03-19 9:57 ` Avi Kivity
2012-03-19 11:12 ` Peter Zijlstra
2012-03-19 11:12 ` Peter Zijlstra
2012-03-19 11:30 ` Peter Zijlstra
2012-03-19 11:30 ` Peter Zijlstra
2012-03-19 11:39 ` Peter Zijlstra
2012-03-19 11:39 ` Peter Zijlstra
2012-03-19 11:42 ` Avi Kivity
2012-03-19 11:42 ` Avi Kivity
2012-03-19 11:59 ` Peter Zijlstra
2012-03-19 11:59 ` Peter Zijlstra
2012-03-19 12:07 ` Avi Kivity
2012-03-19 12:07 ` Avi Kivity
2012-03-19 12:09 ` Peter Zijlstra
2012-03-19 12:09 ` Peter Zijlstra
2012-03-19 12:16 ` Avi Kivity
2012-03-19 12:16 ` Avi Kivity
2012-03-19 20:03 ` Peter Zijlstra
2012-03-19 20:03 ` Peter Zijlstra
2012-03-20 10:18 ` Avi Kivity
2012-03-20 10:18 ` Avi Kivity
2012-03-20 10:48 ` Peter Zijlstra
2012-03-20 10:48 ` Peter Zijlstra
2012-03-20 10:52 ` Avi Kivity
2012-03-20 10:52 ` Avi Kivity
2012-03-20 11:07 ` Peter Zijlstra
2012-03-20 11:07 ` Peter Zijlstra
2012-03-20 11:48 ` Avi Kivity
2012-03-20 11:48 ` Avi Kivity
2012-03-19 12:20 ` Peter Zijlstra
2012-03-19 12:20 ` Peter Zijlstra
2012-03-19 12:24 ` Avi Kivity
2012-03-19 12:24 ` Avi Kivity
2012-03-19 15:44 ` Avi Kivity
2012-03-19 15:44 ` Avi Kivity
2012-03-19 13:40 ` Andrea Arcangeli
2012-03-19 13:40 ` Andrea Arcangeli
2012-03-19 20:06 ` Peter Zijlstra
2012-03-19 20:06 ` Peter Zijlstra
2012-03-19 13:04 ` Andrea Arcangeli
2012-03-19 13:04 ` Andrea Arcangeli
2012-03-19 13:26 ` Peter Zijlstra
2012-03-19 13:26 ` Peter Zijlstra
2012-03-19 13:57 ` Andrea Arcangeli
2012-03-19 13:57 ` Andrea Arcangeli
2012-03-19 14:06 ` Avi Kivity
2012-03-19 14:06 ` Avi Kivity
2012-03-19 14:30 ` Andrea Arcangeli
2012-03-19 14:30 ` Andrea Arcangeli
2012-03-19 18:42 ` Peter Zijlstra
2012-03-19 18:42 ` Peter Zijlstra
2012-03-20 22:18 ` Rik van Riel
2012-03-20 22:18 ` Rik van Riel
2012-03-21 16:50 ` Andrea Arcangeli
2012-03-21 16:50 ` Andrea Arcangeli
2012-04-02 16:34 ` Pekka Enberg
2012-04-02 16:34 ` Pekka Enberg
2012-04-02 16:55 ` Rik van Riel
2012-04-02 16:55 ` Rik van Riel
2012-04-02 16:54 ` Pekka Enberg
2012-04-02 16:54 ` Pekka Enberg
2012-04-02 17:12 ` Pekka Enberg
2012-04-02 17:12 ` Pekka Enberg
2012-04-02 17:23 ` Pekka Enberg
2012-04-02 17:23 ` Pekka Enberg
2012-03-19 14:07 ` Peter Zijlstra
2012-03-19 14:07 ` Peter Zijlstra
2012-03-19 14:34 ` Andrea Arcangeli [this message]
2012-03-19 14:34 ` Andrea Arcangeli
2012-03-19 18:41 ` Peter Zijlstra
2012-03-19 18:41 ` Peter Zijlstra
2012-03-19 19:13 ` Peter Zijlstra
2012-03-19 19:13 ` Peter Zijlstra
2012-03-19 14:07 ` Andrea Arcangeli
2012-03-19 14:07 ` Andrea Arcangeli
2012-03-19 19:05 ` Peter Zijlstra
2012-03-19 19:05 ` Peter Zijlstra
2012-03-19 13:26 ` Peter Zijlstra
2012-03-19 13:26 ` Peter Zijlstra
2012-03-19 14:16 ` Andrea Arcangeli
2012-03-19 14:16 ` Andrea Arcangeli
2012-03-19 13:29 ` Peter Zijlstra
2012-03-19 13:29 ` Peter Zijlstra
2012-03-19 14:19 ` Andrea Arcangeli
2012-03-19 14:19 ` Andrea Arcangeli
2012-03-19 13:39 ` Peter Zijlstra
2012-03-19 13:39 ` Peter Zijlstra
2012-03-19 14:20 ` Andrea Arcangeli
2012-03-19 14:20 ` Andrea Arcangeli
2012-03-19 20:17 ` Christoph Lameter
2012-03-19 20:17 ` Christoph Lameter
2012-03-19 20:28 ` Ingo Molnar
2012-03-19 20:28 ` Ingo Molnar
2012-03-19 20:43 ` Christoph Lameter
2012-03-19 20:43 ` Christoph Lameter
2012-03-19 21:34 ` Ingo Molnar
2012-03-19 21:34 ` Ingo Molnar
2012-03-20 0:05 ` Linus Torvalds
2012-03-20 0:05 ` Linus Torvalds
2012-03-20 7:31 ` Ingo Molnar
2012-03-20 7:31 ` Ingo Molnar
2012-03-21 22:53 ` Nish Aravamudan
2012-03-21 22:53 ` Nish Aravamudan
2012-03-22 9:45 ` Peter Zijlstra
2012-03-22 9:45 ` Peter Zijlstra
2012-03-22 10:34 ` Ingo Molnar
2012-03-22 10:34 ` Ingo Molnar
2012-03-24 1:41 ` Nish Aravamudan
2012-03-24 1:41 ` Nish Aravamudan
2012-03-26 11:42 ` Peter Zijlstra
2012-03-26 11:42 ` Peter Zijlstra
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