From: Rik van Riel <riel@redhat.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.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 1/9] clockpro-nonresident.patch
Date: Sat, 31 Dec 2005 09:53:11 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.63.0512310951210.27198@cuia.boston.redhat.com> (raw)
In-Reply-To: <1136022886.17853.18.camel@twins>
On Sat, 31 Dec 2005, Peter Zijlstra wrote:
> > > +/*
> > > + * For interactive workloads, we remember about as many non-resident pages
> > > + * as we have actual memory pages. For server workloads with large inter-
> > > + * reference distances we could benefit from remembering more.
> > > + */
> >
> > This comment is bogus. Interactive or server loads have nothing to do
> > with the inter reference distance. To the contrary, interactive loads
> > have a higher chance to contain large inter reference distances, and
> > many common server loads have strong locality.
> >
> > <snip>
>
> Happy to drop it, Rik?
Sorry, but the comment is accurate.
For interactive workloads you want to forget interreference
distances between two updatedbs, even if mozilla didn't get
used all weekend.
OTOH, on NFS servers, or other systems with large interreference
distances, you may _need_ to remember a larger set of non-resident
pages in order to find the pages that are the hottest.
In those workloads, the shortest inter-reference distance might
still be larger than the size of memory...
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next prev parent reply other threads:[~2005-12-31 14:53 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 [this message]
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
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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