From: Andrew Morton <akpm@linux-foundation.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: riel@redhat.com, Lee.Schermerhorn@hp.com, a.p.zijlstra@chello.nl,
torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, netdev@vger.kernel.org,
trond.myklebust@fys.uio.no, dlezcano@fr.ibm.com,
penberg@cs.helsinki.fi, neilb@suse.de, davem@davemloft.net
Subject: Re: split-lru performance mesurement part2
Date: Tue, 7 Oct 2008 13:17:19 -0700 [thread overview]
Message-ID: <20081007131719.8bb24698.akpm@linux-foundation.org> (raw)
In-Reply-To: <20081007231851.3B88.KOSAKI.MOTOHIRO@jp.fujitsu.com>
On Tue, 7 Oct 2008 23:26:54 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:
> Hi
>
> > yup,
> > I know many people want to other benchmark result too.
> > I'll try to mesure other bench at next week.
>
> I ran another benchmark today.
> I choice dbench because dbench is one of most famous and real workload like i/o benchmark.
>
>
> % dbench client.txt 4000
>
> mainline: Throughput 13.4231 MB/sec 4000 clients 4000 procs max_latency=1421988.159 ms
> mmotm(*): Throughput 7.0354 MB/sec 4000 clients 4000 procs max_latency=2369213.380 ms
>
> (*) mmotm 2/Oct + Hugh's recently slub fix
>
>
> Wow!
> mmotm is slower than mainline largely (about half performance).
>
> Therefore, I mesured it on "mainline + split-lru(only)" build.
>
>
> mainline + split-lru(only): Throughput 14.4062 MB/sec 4000 clients 4000 procs max_latency=1152231.896 ms
>
>
> OK!
> split-lru outperform mainline from viewpoint of both throughput and latency :)
>
>
>
> However, I don't understand why this regression happend.
erk.
dbench is pretty chaotic and it could be that a good change causes
dbench to get worse. That's happened plenty of times in the past.
> Do you have any suggestion?
One of these:
vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru.patch
vm-dont-run-touch_buffer-during-buffercache-lookups.patch
perhaps?
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next prev parent reply other threads:[~2008-10-07 20:17 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-02 13:05 [PATCH 00/32] Swap over NFS - v19 Peter Zijlstra
2008-10-02 13:05 ` [PATCH 01/32] mm: gfp_to_alloc_flags() Peter Zijlstra
2008-10-02 13:05 ` [PATCH 02/32] mm: serialize access to min_free_kbytes Peter Zijlstra
2008-10-02 13:05 ` [PATCH 03/32] net: ipv6: clean up ip6_route_net_init() error handling Peter Zijlstra
2008-10-07 21:12 ` David Miller, Peter Zijlstra
2008-10-02 13:05 ` [PATCH 04/32] net: ipv6: initialize ip6_route sysctl vars in ip6_route_net_init() Peter Zijlstra
2008-10-07 21:15 ` David Miller, Peter Zijlstra
2008-10-02 13:05 ` [PATCH 05/32] swap over network documentation Peter Zijlstra
2008-10-02 13:05 ` [PATCH 06/32] mm: expose gfp_to_alloc_flags() Peter Zijlstra
2008-10-02 13:05 ` [PATCH 07/32] mm: tag reseve pages Peter Zijlstra
2008-10-02 13:05 ` [PATCH 08/32] mm: slb: add knowledge of reserve pages Peter Zijlstra
2008-10-03 9:32 ` Peter Zijlstra
2008-10-02 13:05 ` [PATCH 09/32] mm: kmem_alloc_estimate() Peter Zijlstra
2008-10-02 13:05 ` [PATCH 10/32] mm: allow PF_MEMALLOC from softirq context Peter Zijlstra
2008-10-02 13:05 ` [PATCH 11/32] mm: emergency pool Peter Zijlstra
2008-10-02 13:05 ` [PATCH 12/32] mm: system wide ALLOC_NO_WATERMARK Peter Zijlstra
2008-10-02 13:05 ` [PATCH 13/32] mm: __GFP_MEMALLOC Peter Zijlstra
2008-10-02 13:05 ` [PATCH 14/32] mm: memory reserve management Peter Zijlstra
2008-10-02 13:05 ` [PATCH 15/32] selinux: tag avc cache alloc as non-critical Peter Zijlstra
2008-10-02 13:05 ` [PATCH 16/32] net: wrap sk->sk_backlog_rcv() Peter Zijlstra
2008-10-07 21:19 ` David Miller, Peter Zijlstra
2008-10-02 13:05 ` [PATCH 17/32] net: packet split receive api Peter Zijlstra
2008-10-07 21:23 ` David Miller, Peter Zijlstra
2008-10-02 13:05 ` [PATCH 18/32] net: sk_allocation() - concentrate socket related allocations Peter Zijlstra
2008-10-07 21:26 ` David Miller, Peter Zijlstra
2008-10-08 6:25 ` Peter Zijlstra
2008-10-02 13:05 ` [PATCH 19/32] netvm: network reserve infrastructure Peter Zijlstra
2008-10-02 13:05 ` [PATCH 20/32] netvm: INET reserves Peter Zijlstra
2008-10-22 5:31 ` Suresh Jayaraman
2008-10-02 13:05 ` [PATCH 21/32] netvm: hook skb allocation to reserves Peter Zijlstra
2008-10-02 13:05 ` [PATCH 22/32] netvm: filter emergency skbs Peter Zijlstra
2008-10-02 13:05 ` [PATCH 23/32] netvm: prevent a stream specific deadlock Peter Zijlstra
2008-10-02 13:05 ` [PATCH 24/32] netfilter: NF_QUEUE vs emergency skbs Peter Zijlstra
2008-10-02 13:05 ` [PATCH 25/32] netvm: skb processing Peter Zijlstra
2008-10-02 13:05 ` [PATCH 26/32] mm: add support for non block device backed swap files Peter Zijlstra
2008-10-02 13:05 ` [PATCH 27/32] mm: methods for teaching filesystems about PG_swapcache pages Peter Zijlstra
2008-10-02 13:05 ` [PATCH 28/32] nfs: remove mempools Peter Zijlstra
2008-10-02 13:05 ` [PATCH 29/32] nfs: teach the NFS client how to treat PG_swapcache pages Peter Zijlstra
2008-10-02 13:05 ` [PATCH 30/32] nfs: disable data cache revalidation for swapfiles Peter Zijlstra
2008-10-02 13:05 ` [PATCH 31/32] nfs: enable swap on NFS Peter Zijlstra
2008-10-02 13:05 ` [PATCH 32/32] nfs: fix various memory recursions possible with swap over NFS Peter Zijlstra
2008-10-02 19:47 ` [PATCH 00/32] Swap over NFS - v19 Andrew Morton
2008-10-02 20:59 ` Lee Schermerhorn
2008-10-03 6:53 ` Nick Piggin
2008-10-03 19:38 ` Rik van Riel
2008-10-04 15:05 ` KOSAKI Motohiro
2008-10-07 14:26 ` split-lru performance mesurement part2 KOSAKI Motohiro
2008-10-07 20:17 ` Andrew Morton [this message]
2008-10-07 21:28 ` Rik van Riel
2008-10-03 6:49 ` [PATCH 00/32] Swap over NFS - v19 Nick Piggin
2008-10-03 17:17 ` Luiz Fernando N. Capitulino
2008-10-04 10:13 ` Peter Zijlstra
2008-10-06 6:04 ` Suresh Jayaraman
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