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From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <cl@linux.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	Pekka Enberg <penberg@cs.helsinki.fi>,
	linux-mm@kvack.org
Subject: Re: [UnifiedV4 00/16] The Unified slab allocator (V4)
Date: Wed, 6 Oct 2010 18:43:26 +0200	[thread overview]
Message-ID: <20101006164326.GB17987@basil.fritz.box> (raw)
In-Reply-To: <alpine.DEB.2.00.1010061133210.31538@router.home>

On Wed, Oct 06, 2010 at 11:37:12AM -0500, Christoph Lameter wrote:
> On Wed, 6 Oct 2010, Andi Kleen wrote:
> 
> > > True. The shared caches can compensate for that. Without this I got
> > > regression because of too many atomic operations during draining and
> > > refilling.
> >
> > Could you just do it by smaller units? (e.g. cores on SMT systems)
> 
> The shared caches are not per node but per sharing domain (l3).

That's the same at least on Intel servers.

> > So it would depend on that total number of caches in the system?
> 
> Yes. Also the expiration is triggerable from user space. You can set up a
> cron job that triggers cache expiration every minute or so.
> movement also.

That doesn't seem like a good way to do this to me. Such things should work
without special cron jobs.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.

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  reply	other threads:[~2010-10-06 16:43 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-05 18:57 [UnifiedV4 00/16] The Unified slab allocator (V4) Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 01/16] slub: Enable sysfs support for !CONFIG_SLUB_DEBUG Christoph Lameter
2010-10-06 14:02   ` Pekka Enberg
2010-10-05 18:57 ` [UnifiedV4 02/16] slub: Move functions to reduce #ifdefs Christoph Lameter
2010-10-06 14:02   ` Pekka Enberg
2010-10-05 18:57 ` [UnifiedV4 03/16] slub: Add per cpu queueing Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 04/16] slub: Allow resizing of per cpu queues Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 05/16] slub: Remove MAX_OBJS limitation Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 06/16] slub: Drop allocator announcement Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 07/16] slub: Object based NUMA policies Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 08/16] slub: Get rid of page lock and rely on per node lock Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 09/16] slub: Shared cache to exploit cross cpu caching abilities Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 10/16] slub: Support Alien Caches Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 11/16] slub: Add a "touched" state to queues and partial lists Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 12/16] slub: Cached object expiration Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 13/16] vmscan: Tie slub object expiration into page reclaim Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 14/16] slub: Reduce size of not performance critical slabs Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 15/16] slub: Detailed reports on validate Christoph Lameter
2010-10-05 18:57 ` [UnifiedV4 16/16] slub: Add stats for alien allocation slowpath Christoph Lameter
2010-10-06  8:01 ` [UnifiedV4 00/16] The Unified slab allocator (V4) Pekka Enberg
2010-10-06 11:03   ` Richard Kennedy
2010-10-06 11:19     ` Pekka Enberg
2010-10-06 15:46       ` Richard Kennedy
2010-10-06 16:21         ` [UnifiedV4 slabinfo 1/2] Move slabinfo.c to tools/slub/slabinfo.c Christoph Lameter
2010-10-06 16:21         ` [UnifiedV4 slabinfo 2/2] slub: update slabinfo.c for queuing Christoph Lameter
2010-10-06 20:56         ` [UnifiedV4 00/16] The Unified slab allocator (V4) Christoph Lameter
2010-10-06 16:00     ` Christoph Lameter
2010-10-06 12:37   ` Wu Fengguang
2010-10-13  2:21     ` Alex,Shi
2010-10-18 18:00       ` Christoph Lameter
2010-10-19  0:01         ` Alex,Shi
2010-10-06 15:56   ` Christoph Lameter
2010-10-13 14:14     ` Mel Gorman
2010-10-18 18:13       ` Christoph Lameter
2010-10-19  9:23         ` Mel Gorman
2010-10-12 18:25   ` Mel Gorman
2010-10-13  7:16     ` Pekka Enberg
2010-10-13 13:46       ` Mel Gorman
2010-10-13 16:10     ` Christoph Lameter
2010-10-06 10:47 ` Andi Kleen
2010-10-06 15:59   ` Christoph Lameter
2010-10-06 16:25     ` Andi Kleen
2010-10-06 16:37       ` Christoph Lameter
2010-10-06 16:43         ` Andi Kleen [this message]
2010-10-06 16:49           ` Christoph Lameter
2010-10-06 16:52           ` Christoph Lameter
2010-10-19 20:39 ` David Rientjes
2010-10-20 13:47   ` Christoph Lameter

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