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From: Austin Gonyou <austin@digitalroadkill.net>
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Roy Sigurd Karlsbakk <roy@karlsbakk.net>,
	linux-kernel@vger.kernel.org
Subject: Re: [BUG] 2.4 VM sucks. Again
Date: 24 May 2002 12:30:05 -0500	[thread overview]
Message-ID: <1022261405.9617.39.camel@UberGeek> (raw)
In-Reply-To: <423360000.1022257916@flay>

On Fri, 2002-05-24 at 11:31, Martin J. Bligh wrote:
> >> I'm not sure exactly what Roy was doing, but we were taking a machine
> >> with 16Gb of RAM, and reading files into the page cache - I think we built up
> >> 8 million buffer_heads according to slabinfo ... on a P4 they're 128 bytes each,
> >> on a P3 96 bytes.
> > 
> > The buffer heads one would make sense. I only test on realistic sized systems. 
> 
> Well, it'll still waste valuable memory there too, though you may not totally kill it.
> 
> > Once you pass 4Gb there are so many problems its not worth using x86 in the
> > long run
> 
I assume that you mean by "not worth using x86" you're referring to say,
degraded performance over other platforms? Well...if you talk
price/performance, using x86 is perfect in those terms since you can buy
more boxes and have a more fluid architecture, rather than building a
monolithic system. Monolithic systems aren't always the best. Just look
at Fermilab!

> Nah, we just haven't fixed them yet ;-)
> 
> M.
> 
> -
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  reply	other threads:[~2002-05-24 17:30 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-05-23 13:11 [BUG] 2.4 VM sucks. Again Roy Sigurd Karlsbakk
2002-05-23 14:54 ` Martin J. Bligh
2002-05-23 16:29   ` Roy Sigurd Karlsbakk
2002-05-23 16:46     ` Martin J. Bligh
2002-05-24 10:04       ` Roy Sigurd Karlsbakk
2002-05-24 14:35         ` Martin J. Bligh
2002-05-24 19:32           ` Andrew Morton
2002-05-30 10:29             ` Roy Sigurd Karlsbakk
2002-05-30 19:28               ` Andrew Morton
2002-05-31 16:56                 ` Roy Sigurd Karlsbakk
2002-05-31 18:19                   ` Andrea Arcangeli
2002-06-18 11:26             ` Roy Sigurd Karlsbakk
2002-06-18 19:42               ` Andrew Morton
2002-06-19 11:26                 ` Roy Sigurd Karlsbakk
2002-07-10  7:50             ` [2.4 BUFFERING BUG] (was [BUG] 2.4 VM sucks. Again) Roy Sigurd Karlsbakk
2002-07-10  8:05               ` Andrew Morton
2002-07-10  8:14                 ` Roy Sigurd Karlsbakk
2002-08-28  9:28             ` [BUG+FIX] 2.4 buggercache sucks Roy Sigurd Karlsbakk
2002-08-28 15:30               ` Martin J. Bligh
2002-08-29  8:00                 ` Roy Sigurd Karlsbakk
2002-08-29 13:42                   ` Martin J. Bligh
2002-08-30  9:21                     ` Roy Sigurd Karlsbakk
2002-08-30 17:19                       ` Martin J. Bligh
2002-08-30 18:49                         ` Andrew Morton
2002-05-24 15:11     ` [BUG] 2.4 VM sucks. Again Alan Cox
2002-05-24 15:53       ` Martin J. Bligh
2002-05-24 16:14         ` Alan Cox
2002-05-24 16:31           ` Martin J. Bligh
2002-05-24 17:30             ` Austin Gonyou [this message]
2002-05-24 17:43               ` Martin J. Bligh
2002-05-24 18:03                 ` Austin Gonyou
2002-05-24 18:10                   ` Martin J. Bligh
2002-05-24 18:29                     ` 2.4 Kernel Perf discussion [Was Re: [BUG] 2.4 VM sucks. Again] Austin Gonyou
2002-05-24 19:01                       ` Stephen Frost
2002-05-27  9:24               ` [BUG] 2.4 VM sucks. Again Marco Colombo
2002-05-27 22:24                 ` Austin Gonyou
2002-05-27 23:08                   ` Austin Gonyou
2002-05-27 11:12       ` Roy Sigurd Karlsbakk
2002-05-27 14:31         ` Alan Cox
2002-05-27 13:43           ` Roy Sigurd Karlsbakk
2002-05-23 16:03 ` Johannes Erdfelt
2002-05-23 16:33   ` Roy Sigurd Karlsbakk
2002-05-23 22:50     ` Luigi Genoni
2002-05-24 11:53       ` Roy Sigurd Karlsbakk
2002-05-23 18:12 ` jlnance
2002-05-24 10:36   ` Roy Sigurd Karlsbakk
2002-05-31 21:21     ` Andrea Arcangeli
2002-06-01 12:36       ` Roy Sigurd Karlsbakk

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