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From: Helge Hafting <helgehaf@idb.hist.no>
To: lar@cs.york.ac.uk, linux-kernel@vger.kernel.org
Subject: Re: 2.4.6-pre2, pre3 VM Behavior
Date: Thu, 14 Jun 2001 11:24:16 +0200	[thread overview]
Message-ID: <3B2882C0.EDA802E3@idb.hist.no> (raw)
In-Reply-To: <JKEGJJAJPOLNIFPAEDHLGEMBDCAA.laramie.leavitt@btinternet.com>

Laramie Leavitt wrote:

> Would it be possible to maintain a dirty-rate count
> for the dirty buffers?
> 
> For example, we it is possible to figure an approximate
> disk subsystem speed from most of the given information.

Disk speed is difficult.  I may enable and disable swap on any number of
very different disks and files.  And making it per-device won't help
that
much.  The device may have other partitions with varying access
patterns.
and sometimes differnet devices interfer with each other, such
as two IDE drives on the same cable.  Or several scsi drives
using up scsi (or pci!) bandwith for file access.

You may be able to get some useful approximations, but you
will probably not be able to get good numbers in all cases.

Helge Hafting

  reply	other threads:[~2001-06-14  9:26 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-13 19:31 2.4.6-pre2, pre3 VM Behavior Tom Sightler
2001-06-13 20:21 ` Rik van Riel
2001-06-14  1:49   ` Tom Sightler
2001-06-14  3:16     ` Rik van Riel
2001-06-14  7:59       ` Laramie Leavitt
2001-06-14  9:24         ` Helge Hafting [this message]
2001-06-14 17:38           ` Mark Hahn
2001-06-15  8:27             ` Helge Hafting
2001-06-14  8:47       ` Daniel Phillips
2001-06-14 20:23         ` Roger Larsson
2001-06-15  6:04           ` Mike Galbraith
2001-06-14 20:39         ` John Stoffel
2001-06-14 20:51           ` Rik van Riel
2001-06-14 21:33           ` John Stoffel
2001-06-14 22:23             ` Rik van Riel
2001-06-15 15:23           ` spindown [was Re: 2.4.6-pre2, pre3 VM Behavior] Pavel Machek
2001-06-16 20:50             ` Daniel Phillips
2001-06-16 21:06               ` Rik van Riel
2001-06-16 21:25                 ` Rik van Riel
2001-06-16 21:44                 ` Daniel Phillips
2001-06-16 21:54                   ` Rik van Riel
2001-06-17 10:28                     ` Daniel Phillips
2001-06-17 10:05                   ` Mike Galbraith
2001-06-17 12:49                     ` (lkml)Re: " thunder7
2001-06-17 16:40                       ` Mike Galbraith
2001-06-18 14:22                     ` Daniel Phillips
2001-06-19  4:35                       ` Mike Galbraith
2001-06-20  1:50                       ` [RFC] Early flush (was: spindown) Daniel Phillips
2001-06-20 20:58                         ` Tom Sightler
2001-06-20 22:09                           ` Daniel Phillips
2001-06-24  3:20                           ` Anuradha Ratnaweera
2001-06-24 11:14                             ` Daniel Phillips
2001-06-24 15:06                             ` Rik van Riel
2001-06-24 16:21                               ` Daniel Phillips
2001-06-20  4:39                       ` Richard Gooch
2001-06-20 14:29                         ` Daniel Phillips
2001-06-20 16:12                         ` Richard Gooch
2001-06-22 23:25                           ` Daniel Kobras
2001-06-23  5:10                             ` Daniel Phillips
2001-06-25 11:33                               ` Pavel Machek
2001-06-25 11:31                           ` Pavel Machek
2001-06-18 20:21             ` spindown Simon Huggins
2001-06-19 10:46               ` spindown Pavel Machek
2001-06-20 16:52                 ` spindown Daniel Phillips
2001-06-20 17:32                   ` spindown Rik van Riel
2001-06-20 18:00                     ` spindown Daniel Phillips
2001-06-21 16:07                 ` spindown Jamie Lokier
2001-06-22 22:09                   ` spindown Daniel Kobras
2001-06-28  0:27                   ` spindown Troy Benjegerdes
2001-06-14 15:10       ` 2.4.6-pre2, pre3 VM Behavior John Stoffel
2001-06-14 18:25         ` Daniel Phillips
2001-06-14  8:30   ` Mike Galbraith
     [not found] <Pine.LNX.4.10.10106140024230.980-100000@coffee.psychology.mcmaster.ca>
2001-06-14  2:08 ` Tom Sightler

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