netdev
[Top] [All Lists]

Re: _High_ CPU usage while routing (mostly) small UDP packets

To: jamal <hadi@xxxxxxxxxx>
Subject: Re: _High_ CPU usage while routing (mostly) small UDP packets
From: Karsten Desler <kdesler@xxxxxxxxxx>
Date: Tue, 7 Dec 2004 14:14:45 +0100
Cc: Robert Olsson <Robert.Olsson@xxxxxxxxxxx>, Bernd Eckenfels <ecki-news2004-05@xxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <1102422845.1089.105.camel@xxxxxxxxxxxxxxxx>
References: <E1CbSf8-00047p-00@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <20041207002012.GB30674@xxxxxxxxxxxxxxxxxxxx> <1102387595.1088.48.camel@xxxxxxxxxxxxxxxx> <20041207025456.GA525@xxxxxxxxxx> <1102389533.1089.51.camel@xxxxxxxxxxxxxxxx> <20041207032438.GA7767@xxxxxxxxxx> <1102390241.1093.59.camel@xxxxxxxxxxxxxxxx> <20041207040235.GA10501@xxxxxxxxxx> <20041207102132.GA28588@xxxxxxxxxxxxxxxxxxxx> <1102422845.1089.105.camel@xxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mutt/1.5.6+20040722i
* jamal wrote:
> > # sar -I 169 5 5
> > 11:20:05         INTR    intr/s
> > 11:20:10          169  10401.40
> 
> That doesnt seem to be too high. 

To recap: 169 is a fibre e1000, eth1 is one of two ports on a dualport
e1000 copper nic. eth1 is still running at about 4k int/s.

14:12:18         INTR    intr/s
14:12:23          169  34012.80
14:12:28          169  33977.60
14:12:33          169  34218.16
14:12:38          169  34060.60
14:12:43          169  34252.60
Average:          169  34104.40

Cheers,
 Karsten

<Prev in Thread] Current Thread [Next in Thread>