From: Karsten Desler <kdesler@soohrt.org>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@oss.sgi.com, linux-kernel@vger.kernel.org
Subject: Re: _High_ CPU usage while routing (mostly) small UDP packets
Date: Mon, 6 Dec 2004 23:41:07 +0100 [thread overview]
Message-ID: <20041206224107.GA8529@soohrt.org> (raw)
In-Reply-To: <20041206134849.498bfc93.davem@davemloft.net>
* David S. Miller wrote:
> It's spending nearly half of it's time in iptables.
> Try to consolidate your rules if possible. This is the
> part of netfilter that really doesn't scale well at all.
>
Removing the iptables rules helps reducing the load a little, but the
majority of time is still spent somewhere else.
50kpps rx and 43kpps tx.
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 1802956 101032 104464 0 0 0 18 74 26 0 21 79 0
0 0 0 1802956 101032 104464 0 0 0 61 8810 28 0 25 75 0
0 0 0 1802956 101032 104464 0 0 0 233 8867 17 0 24 76 0
0 0 0 1802892 101032 104464 0 0 0 0 8865 16 0 21 79 0
0 0 0 1802892 101032 104464 0 0 0 0 8772 8 0 18 82 0 <- iptables -F
0 0 0 1802892 101032 104464 0 0 0 36 8863 18 0 19 81 0
0 0 0 1802892 101032 104464 0 0 0 80 8700 18 0 18 82 0
0 0 0 1802956 101032 104464 0 0 0 0 8779 7 0 17 83 0
0 0 0 1802948 101032 104464 0 0 0 223 8716 278 4 19 76 0
- Karsten
next prev parent reply other threads:[~2004-12-06 22:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-06 20:53 _High_ CPU usage while routing (mostly) small UDP packets Karsten Desler
2004-12-06 21:48 ` David S. Miller
2004-12-06 22:41 ` Karsten Desler [this message]
2004-12-06 23:56 ` Con Kolivas
2004-12-07 0:18 ` Karsten Desler
[not found] ` <E1CbSf8-00047p-00@calista.eckenfels.6bone.ka-ip.net>
2004-12-07 0:20 ` Karsten Desler
2004-12-07 2:46 ` jamal
2004-12-07 2:54 ` Karsten Desler
2004-12-07 3:18 ` jamal
2004-12-07 3:24 ` Karsten Desler
2004-12-07 3:30 ` jamal
2004-12-07 4:02 ` Karsten Desler
2004-12-07 10:21 ` Karsten Desler
2004-12-07 12:34 ` jamal
2004-12-07 13:14 ` Karsten Desler
2004-12-07 10:47 ` P
2004-12-07 11:21 ` Karsten Desler
2004-12-07 12:38 ` Robert Olsson
2004-12-07 12:50 ` Karsten Desler
2004-12-07 13:04 ` jamal
2004-12-07 13:11 ` Karsten Desler
2004-12-07 13:39 ` P
2004-12-07 18:38 ` Karsten Desler
2004-12-08 5:39 ` Willy Tarreau
2004-12-08 13:08 ` Karsten Desler
2004-12-08 13:27 ` jamal
2004-12-07 21:10 ` Karsten Desler
2004-12-07 22:40 ` Robert Olsson
2004-12-08 22:06 ` Karsten Desler
2004-12-08 4:31 ` jamal
2004-12-08 13:26 ` Karsten Desler
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=20041206224107.GA8529@soohrt.org \
--to=kdesler@soohrt.org \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@oss.sgi.com \
/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;
as well as URLs for NNTP newsgroup(s).