From: David Rientjes <rientjes@google.com>
To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [UnifiedV4 00/16] The Unified slab allocator (V4)
Date: Tue, 19 Oct 2010 13:39:55 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1010191337370.20631@chino.kir.corp.google.com> (raw)
In-Reply-To: <20101005185725.088808842@linux.com>
On Tue, 5 Oct 2010, Christoph Lameter wrote:
> V3->V4:
> - Lots of debugging
> - Performance optimizations (more would be good)...
> - Drop per slab locking in favor of per node locking for
> partial lists (queuing implies freeing large amounts of objects
> to per node lists of slab).
> - Implement object expiration via reclaim VM logic.
>
I applied this set on top of Pekka's for-next tree reverted back to
5d1f57e4 since it doesn't apply later then that.
Overall, the results are _much_ better than the vanilla slub allocator
that I frequently saw ~20% regressions with the TCP_RR netperf benchmark
on a couple of my machines with larger cpu counts. However, there still
is a significant performance degradation compared to slab.
When running this patchset on two (client and server running
netperf-2.4.5) four 2.2GHz quad-core AMD processors with 64GB of memory,
here're the results:
threads SLAB SLUB diff
16 207038 184389 -10.9%
32 266105 234386 -11.9%
48 287989 252733 -12.2%
64 307572 277221 - 9.9%
80 309802 284199 - 8.3%
96 302959 291743 - 3.7%
112 307381 297459 - 3.2%
128 314582 299340 - 4.8%
144 331945 299648 - 9.7%
160 321882 314192 - 2.4%
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next prev parent reply other threads:[~2010-10-19 20:40 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-05 18:57 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
2010-10-06 16:49 ` Christoph Lameter
2010-10-06 16:52 ` Christoph Lameter
2010-10-19 20:39 ` David Rientjes [this message]
2010-10-20 13:47 ` Christoph Lameter
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