From: Peter Zijlstra <peter@programming.kicks-ass.net>
To: IWAMOTO Toshihiro <iwamoto@valinux.co.jp>
Cc: Rik van Riel <riel@redhat.com>,
Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
linux-mm@kvack.org, Andrew Morton <akpm@osdl.org>,
Christoph Lameter <christoph@lameter.com>,
Wu Fengguang <wfg@mail.ustc.edu.cn>,
Nick Piggin <npiggin@suse.de>, Marijn Meijles <marijn@bitpit.net>
Subject: Re: [PATCH 6/9] clockpro-clockpro.patch
Date: Mon, 06 Feb 2006 11:07:27 +0100 [thread overview]
Message-ID: <1139220448.11539.17.camel@localhost.localdomain> (raw)
In-Reply-To: <20060206093023.E4F227402D@sv1.valinux.co.jp>
> > > Environment: Dell 1850 4GB EM64T CPUx2 HT disabled, x86_64 kernel
> > > Kernel 1: linux-2.6.15-rc5
> > > Kernel 2: linux-2.6.15-rc5 + clockpro patch posted in 2005/12/31
> > > Kernel 3: linux-2.6.15-rc5 + clockpro patch posted in 2005/12/31 +
> > > modification to disable page cache usage from ZONE_DMA
> > > (to rule out possible zone balancing related problem)
> > > n Kernel 1 Kernel 2 Kernel 3
> > > ======================================
> > > 100 373600 298720 395818
> > > 200 385639 272749 272166
> > > 300 371047 243734 262370
> > > 400 367691 213974 169714
> > > 500 147130 126284 103038
> I've built kernels with CONFIG_MM_POLICY_CLOCKPRO enabled and disabled
> and ran the same tests.
>
> n disabled enabled
> ========================
> 100 366962 392283
> 200 342172 393087
> 300 339325 309595
> 400 230029 283340
> 500 121352 132298
>
> The non-clockpro version (left) has got slower in n >= 400, and the
> clockpro version has got faster in n <= 400. The clockpro version is
> still slower than the "kernel 1" for n=300,400. There seem to be a
> few percents of measurement variances, so I shouldn't judge something
> from small differences in values.
Hmm, better but still some ways to go. Thanks for the results.
> > esp. the last patch in the series:
> > http://programming.kicks-ass.net/kernel-patches/page-replace/2.6.16-rc1-3/kswapd-writeout-wait.patch
>
> This change doesn't seem to be related to clockpro. I wonder if (and
> why) it is significant.
Ah, no patch description there yet. What happens is that most of the new
policies (can) require quite a lot of scanning and are hitting:
blk_congestion_wait(WRITE, HZ/10);
way too often without actually having submitted IO.
> I haven't tried but it should be possible to create similar workloads
> by scaling down the arguments to 2read.c.
>
> BTW, I made some detailed measurments with older kernels. I'll mail
> the results later.
Yes, I did that, however your results show a greater decrease in
throughput than I was able to get. Will investigate my setup.
Kind regards,
Peter
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next prev parent reply other threads:[~2006-02-06 10:07 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-30 22:40 [PATCH] vm: page-replace and clockpro Peter Zijlstra
2005-12-30 22:40 ` [PATCH 01/14] page-replace-single-batch-insert.patch Peter Zijlstra
2005-12-31 7:03 ` Marcelo Tosatti
2005-12-31 9:43 ` Peter Zijlstra
2005-12-31 14:44 ` Rik van Riel
2005-12-31 22:19 ` Marcelo Tosatti
2005-12-30 22:40 ` [PATCH 02/14] page-replace-try_pageout.patch Peter Zijlstra
2005-12-30 22:40 ` [PATCH 03/14] page-replace-remove-sc-from-refill.patch Peter Zijlstra
2005-12-30 22:40 ` [PATCH 04/14] page-replace-activate_page.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 05/14] page-replace-remove-loop.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 06/14] page-replace-move-macros.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 07/14] page-replace-move-isolate_lru_pages.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 08/14] page-replace-candidates.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 09/14] page-replace-reinsert.patch Peter Zijlstra
2005-12-30 22:41 ` [PATCH 10/14] page-replace-remove-mm_inline.patch Peter Zijlstra
2005-12-30 22:42 ` [PATCH 11/14] page-replace-move-refill.patch Peter Zijlstra
2005-12-30 22:42 ` [PATCH 12/14] page-replace-rotate.patch Peter Zijlstra
2005-12-30 22:42 ` [PATCH 13/14] page-replace-init.patch Peter Zijlstra
2005-12-30 22:42 ` [PATCH 14/14] page-replace-kswapd-incmin.patch Peter Zijlstra
2005-12-31 1:15 ` Marcelo Tosatti
2005-12-31 9:40 ` Peter Zijlstra
2005-12-30 22:42 ` [PATCH 1/9] clockpro-nonresident.patch Peter Zijlstra
2005-12-31 1:13 ` Marcelo Tosatti
2005-12-31 9:54 ` Peter Zijlstra
2005-12-31 14:53 ` Rik van Riel
2005-12-31 22:20 ` Marcelo Tosatti
2005-12-30 22:42 ` [PATCH 2/9] clockpro-nonresident-del.patch Peter Zijlstra
2005-12-30 22:43 ` [PATCH 3/9] clockpro-PG_test.patch Peter Zijlstra
2005-12-30 22:43 ` [PATCH 4/9] clockpro-use-once.patch Peter Zijlstra
2005-12-30 22:43 ` [PATCH 5/9] clockpro-ignore_token.patch Peter Zijlstra
2005-12-30 22:43 ` [PATCH 6/9] clockpro-clockpro.patch Peter Zijlstra
2005-12-31 0:24 ` Marcelo Tosatti
2005-12-31 1:22 ` Rik van Riel
2005-12-31 3:27 ` Marcelo Tosatti
2005-12-31 5:24 ` Rik van Riel
2005-12-31 10:57 ` Peter Zijlstra
2005-12-31 10:48 ` Peter Zijlstra
2005-12-31 22:12 ` Marcelo Tosatti
2006-01-03 19:30 ` Christoph Lameter
2005-12-31 11:29 ` Peter Zijlstra
2006-01-05 9:47 ` IWAMOTO Toshihiro
2006-01-05 13:32 ` Rik van Riel
2006-01-06 9:01 ` IWAMOTO Toshihiro
2006-01-24 6:30 ` IWAMOTO Toshihiro
2006-01-24 7:25 ` IWAMOTO Toshihiro
2006-01-25 8:00 ` Peter Zijlstra
2006-02-03 9:25 ` Peter Zijlstra
2006-02-06 9:30 ` IWAMOTO Toshihiro
2006-02-06 10:07 ` Peter Zijlstra [this message]
2006-02-08 10:05 ` IWAMOTO Toshihiro
2006-02-08 20:00 ` Peter Zijlstra
2006-02-09 6:57 ` Peter Zijlstra
2006-02-09 7:22 ` IWAMOTO Toshihiro
2006-02-09 10:07 ` IWAMOTO Toshihiro
2006-02-09 15:23 ` Rik van Riel
2006-02-08 9:53 ` IWAMOTO Toshihiro
2005-12-31 22:40 ` Marcelo Tosatti
2006-01-01 10:37 ` Peter Zijlstra
2006-01-03 12:21 ` Marcelo Tosatti
2006-02-14 7:29 ` IWAMOTO Toshihiro
2006-02-15 6:35 ` Peter Zijlstra
2006-02-16 6:25 ` IWAMOTO Toshihiro
2005-12-30 22:43 ` [PATCH 7/9] clockpro-remove-old.patch Peter Zijlstra
2005-12-30 22:43 ` [PATCH 8/9] clockpro-rename_PG_active.patch Peter Zijlstra
2005-12-30 22:44 ` [PATCH 9/9] clockpro-clockpro-stats.patch Peter Zijlstra
2005-12-31 18:59 ` [PATCH 10/9] clockpro-document.patch Peter Zijlstra
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