From: Christoph Lameter <cl@linux.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Pekka Enberg <penberg@kernel.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
David Rientjes <rientjes@google.com>,
npiggin@kernel.dk, yanmin_zhang@linux.intel.com
Subject: Re: [UnifiedV4 00/16] The Unified slab allocator (V4)
Date: Mon, 18 Oct 2010 13:13:42 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1010181305000.2092@router.home> (raw)
In-Reply-To: <20101013141455.GQ30667@csn.ul.ie>
On Wed, 13 Oct 2010, Mel Gorman wrote:
> Minimally, I see the same sort of hackbench socket performance regression
> as reported elsewhere (10-15% regression). Otherwise, it isn't particularly
> exciting results. The machine is very basic - 2 socket, 4 cores, x86-64,
> 2G RAM. Macine model is an IBM BladeCenter HS20. Processor is Xeon but I'm
> not sure exact what model. It appears to be from around the P4 times.
Looks not good. Something must still be screwed up. Trouble is to find
time to do this work. When working on SLAB we had a team to implement the
NUMA stuff and deal with the performance issues.
> Christoph, in particular while it tests netperf, it is not binding to any
> particular CPU (although it can), server and client are running on the local
> machine (which has particular performance characterisitcs of its own) and
> the tests is STREAM, not RR so the tarball is not a replacement for more
> targetting testing or workload-specific testing. Still, it should catch
> some of the common snags before getting into specific workloads without
> taking an extraordinary amount of time to complete. sysbench might take a
> long time for many-core machines, limit the number of threads it tests with
> OLTP_MAX_THREADS in the config file.
That should not matter too much. The performance results should replicate
SLABs caching behavior and I do not see that in the tests.
> NETPERF UDP
> netperf-udp netperf-udp udp-slub
> slab-vanilla slub-vanilla unified-v4r1
> 64 52.23 ( 0.00%)* 53.80 ( 2.92%) 50.56 (-3.30%) 1.36% 1.00% 1.00%
> 128 103.70 ( 0.00%) 107.43 ( 3.47%) 101.23 (-2.44%)
> 256 208.62 ( 0.00%)* 212.15 ( 1.66%) 202.35 (-3.10%) 1.73% 1.00% 1.00%
> 1024 814.86 ( 0.00%) 827.42 ( 1.52%) 799.13 (-1.97%)
> 2048 1585.65 ( 0.00%) 1614.76 ( 1.80%) 1563.52 (-1.42%)
> 3312 2512.44 ( 0.00%) 2556.70 ( 1.73%) 2460.37 (-2.12%)
> 4096 3016.81 ( 0.00%)* 3058.16 ( 1.35%) 2901.87 (-3.96%) 1.15% 1.00% 1.00%
> 8192 5384.46 ( 0.00%) 5092.95 (-5.72%) 4912.71 (-9.60%)
> 16384 8091.96 ( 0.00%)* 8249.26 ( 1.91%) 8004.40 (-1.09%) 1.70% 1.00% 1.00%
Seems that we lost some of the netperf wins.
> SYSBENCH
> sysbench-slab-vanilla-sysbenchsysbench-slub-vanilla-sysbench sysbench-slub
> slab-vanilla slub-vanilla unified-v4r1
> 1 7521.24 ( 0.00%) 7719.38 ( 2.57%) 7589.13 ( 0.89%)
> 2 14872.85 ( 0.00%) 15275.09 ( 2.63%) 15054.08 ( 1.20%)
> 3 16502.53 ( 0.00%) 16676.53 ( 1.04%) 16465.69 (-0.22%)
> 4 17831.19 ( 0.00%) 17900.09 ( 0.38%) 17819.03 (-0.07%)
> 5 18158.40 ( 0.00%) 18432.74 ( 1.49%) 18341.99 ( 1.00%)
> 6 18673.68 ( 0.00%) 18878.41 ( 1.08%) 18614.92 (-0.32%)
> 7 17689.75 ( 0.00%) 17871.89 ( 1.02%) 17633.19 (-0.32%)
> 8 16885.68 ( 0.00%) 16838.37 (-0.28%) 16498.41 (-2.35%)
Same here. Seems that we combined the worst of both.
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next prev parent reply other threads:[~2010-10-18 18:13 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 [this message]
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
2010-10-20 13:47 ` Christoph Lameter
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