From: Tim Allingham <deserted@westnet.com.au>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Linux too damn slow if memory > 3GB
Date: Sun, 29 Jul 2007 09:39:50 +1000 [thread overview]
Message-ID: <1185665991.14058.2.camel@localhost> (raw)
In-Reply-To: <8a0c7af10707281628p61dac9f1x89aef31a6f2b71df@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1186 bytes --]
On Sat, 2007-07-28 at 20:28 -0300, Daniel van Ham Colchete wrote:
> Hello everyone!!!
>
> May be somebody can shed some light here... I'm building a server here
> with 4GB of RAM memory. The fact is, if I boot with mem=3072M
> everything goes as fast as it should but I'm not using 1GB of memory.
> If I don't put the mem option, Linux will see 4GB of memory available
> but it will be damn slow (really).
>
> To make Linux recognize 4 gigs of memory I had to activate
> HIGHMEM=64GB, otherwise it only recognizes 3279MB (but it is fast).
>
> My processor is a Intel Core 2 Duo E6320 (1.86Ghz). The motherboard is
> Intel. I'm running Gentoo at 32bits mode and the kernel version is
> 2.6.20-gentoo-r8.
>
> Any lights would be very appreciated.
>
> Best regards,
> Daniel Colchete
I don't actually run 4GB of RAM in any of my intel systems, so I can't
comment from experience, however my suspicion would be the overhead
introduced from PAE, which (at least on older kernels) requires some
processing overhead to utilise. Are you able to try a 64-bit install to
determine if this is the case?
Regards,
Tim Allingham
Email:Tim@DataFirst-IT.com.au
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 189 bytes --]
next prev parent reply other threads:[~2007-07-28 23:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-28 23:28 [gentoo-user] Linux too damn slow if memory > 3GB Daniel van Ham Colchete
2007-07-28 23:39 ` Tim Allingham [this message]
2007-07-28 23:52 ` Tim Allingham
2007-07-29 0:10 ` Daniel van Ham Colchete
2007-07-29 0:12 ` Stroller
2007-07-30 15:59 ` Daniel van Ham Colchete
2007-07-30 17:08 ` Steen Eugen Poulsen
2007-07-30 17:28 ` Developer Edoceo
2007-07-30 18:24 ` Daniel van Ham Colchete
2007-08-01 14:17 ` Duane Griffin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1185665991.14058.2.camel@localhost \
--to=deserted@westnet.com.au \
--cc=gentoo-user@lists.gentoo.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox