From: Alan Cox <alan@redhat.com>
To: Yannis Smaragdakis <yannis@cc.gatech.edu>
Cc: Rik van Riel <riel@conectiva.com.br>,
Andrea Arcangeli <andrea@suse.de>,
"Stephen C. Tweedie" <sct@redhat.com>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
Jens Axboe <axboe@suse.de>, Alan Cox <alan@redhat.com>,
Derek Martin <derek@cerberus.ne.mediaone.net>,
davem@redhat.com, linux-mm@kvack.org
Subject: Re: [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on
Date: Mon, 17 Jul 2000 10:46:11 -0400 (EDT) [thread overview]
Message-ID: <200007171446.KAA07554@devserv.devel.redhat.com> (raw)
In-Reply-To: <200007170709.DAA27512@ocelot.cc.gatech.edu> from "Yannis Smaragdakis" at Jul 17, 2000 03:09:06 AM
> Both will cause exactly one page fault. Also, one should be cautious of
> pages that are brought in RAM, touched many times, but then stay untouched
> for a long time. Frequency should never outweigh recency--the latter is
> a better predictor, as OS designers have found since the early 70s.
Modern OS designers are consistently seeing LFU work better. In our case this
is partly theory in the FreeBSD case its proven by trying it.
> pages we recently evicted), we adapt it by evicting more recently
> touched pages (sounds hacky, but it is actually very clean).
>
> The results are very good (even better than in the paper, as we have
> improved the algorithm since).
Interesting
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next prev parent reply other threads:[~2000-07-17 14:46 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20000629114407.A3914@redhat.com>
[not found] ` <Pine.LNX.4.21.0006291330520.1713-100000@inspiron.random>
2000-06-29 13:00 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 Stephen C. Tweedie
2000-07-06 10:35 ` Andrea Arcangeli
2000-07-06 13:29 ` Stephen C. Tweedie
2000-07-09 17:11 ` Swap clustering with new VM Marcelo Tosatti
2000-07-09 20:53 ` Andrea Arcangeli
2000-07-11 9:36 ` Stephen C. Tweedie
2000-07-09 20:31 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 Andrea Arcangeli
2000-07-11 11:50 ` Stephen C. Tweedie
2000-07-11 16:17 ` Andrea Arcangeli
2000-07-11 16:36 ` Juan J. Quintela
2000-07-11 17:33 ` Andrea Arcangeli
2000-07-11 17:45 ` Rik van Riel
2000-07-11 17:54 ` Andrea Arcangeli
2000-07-11 18:03 ` Juan J. Quintela
2000-07-11 19:32 ` Andrea Arcangeli
2000-07-12 0:05 ` John Alvord
2000-07-12 0:52 ` Andrea Arcangeli
2000-07-12 18:02 ` Rik van Riel
2000-07-14 8:51 ` Stephen C. Tweedie
2000-07-11 17:32 ` Rik van Riel
2000-07-11 17:41 ` Andrea Arcangeli
2000-07-11 17:47 ` Rik van Riel
2000-07-11 18:00 ` Andrea Arcangeli
2000-07-11 18:06 ` Rik van Riel
2000-07-17 7:09 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on Yannis Smaragdakis
2000-07-17 9:28 ` Stephen C. Tweedie
2000-07-17 13:01 ` James Manning
2000-07-17 14:32 ` Scott F. Kaplan
2000-07-17 14:53 ` Rik van Riel
2000-07-17 16:44 ` Manfred Spraul
2000-07-17 17:02 ` Rik van Riel
2000-07-17 18:55 ` Yannis Smaragdakis
2000-07-17 19:57 ` John Fremlin
2000-07-17 14:46 ` Alan Cox [this message]
2000-07-17 14:55 ` Scott F. Kaplan
2000-07-17 15:31 ` Rik van Riel
2000-07-14 9:01 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 Stephen C. Tweedie
2000-07-11 18:13 ` Juan J. Quintela
2000-07-11 20:57 ` Roger Larsson
2000-07-11 22:49 ` Juan J. Quintela
2000-07-12 16:01 ` Kev
2000-07-06 13:54 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on2.4.0-test2 Roman Zippel
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