From: Rik van Riel <riel@conectiva.com.br>
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Andrew Morton <akpm@zip.com.au>,
Andrea Arcangeli <andrea@suse.de>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
<linux-kernel@vger.kernel.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Bug with shared memory.
Date: Mon, 20 May 2002 16:38:15 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.44L.0205201630050.24352-100000@imladris.surriel.com> (raw)
In-Reply-To: <1232903251.1021886554@[10.10.2.3]>
On Mon, 20 May 2002, Martin J. Bligh wrote:
> 1) Running Oracle apps, doing raw IO. We are running an -aa kernel
> on this machine, and it doesn't help.
> So, we haven't really given Andrea's patch a fair test yet. If you
> guys can agree which the better approach is by just discussing it,
One thing that seems to be missing in Linux are proper VM
statistics. There is no way handwaving and discussions are
going to be better than a measurement of what's going on
inside the VM.
Treating the different VM patch sets as black boxes with
benchmarks will show us which VM works best for which
benchmark, but it won't show us why or how to combine the
good features of the different VMs...
I think good statistics to start would be the traditional
page fault rate (pf), page free rate (fr), page scan rate
(sr), reclaims (re), pageout (po), pagein (pi) and some
variation of iowait stats.
regards,
Rik
--
Bravely reimplemented by the knights who say "NIH".
http://www.surriel.com/ http://distro.conectiva.com/
next prev parent reply other threads:[~2002-05-20 19:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-14 15:13 Bug with shared memory Martin Schwidefsky
2002-05-14 19:33 ` Andrew Morton
2002-05-15 22:42 ` Mike Kravetz
2002-05-15 23:07 ` Andrew Morton
2002-05-17 17:53 ` Bill Davidsen
2002-05-17 20:07 ` Mike Kravetz
2002-05-17 20:29 ` Anton Blanchard
2002-05-20 4:30 ` Andrea Arcangeli
2002-05-20 5:21 ` Andrew Morton
2002-05-20 11:34 ` Andrey Savochkin
2002-05-20 14:15 ` Andrea Arcangeli
2002-05-20 19:24 ` Rik van Riel
2002-05-20 23:46 ` Andrea Arcangeli
2002-05-21 0:14 ` Martin J. Bligh
2002-05-21 1:40 ` Andrea Arcangeli
2002-05-20 16:22 ` Martin J. Bligh
2002-05-20 19:38 ` Rik van Riel [this message]
2002-05-20 20:06 ` William Lee Irwin III
2002-05-20 16:13 ` Martin J. Bligh
2002-05-20 16:37 ` Andrea Arcangeli
2002-05-20 17:23 ` Martin J. Bligh
2002-05-20 17:32 ` William Lee Irwin III
2002-05-24 7:33 ` inode highmem imbalance fix [Re: Bug with shared memory.] Andrea Arcangeli
2002-05-24 7:51 ` William Lee Irwin III
2002-05-24 8:04 ` Andrew Morton
2002-05-24 15:20 ` Andrea Arcangeli
2002-05-24 11:47 ` Ed Tomlinson
2002-05-30 11:25 ` Denis Lunev
2002-05-30 17:59 ` Andrea Arcangeli
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