From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: kernel 2.4 vs 2.6 Traffic Controller performance Date: Wed, 03 Oct 2007 09:00:32 +0200 Message-ID: <47033E10.6090505@cosmosbay.com> References: <9dbec86d0710022314o6db2b0baua6db543d52f312b6@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: Sonny Return-path: Received: from gw1.cosmosbay.com ([86.65.150.130]:39044 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751857AbXJCHAo (ORCPT ); Wed, 3 Oct 2007 03:00:44 -0400 In-Reply-To: <9dbec86d0710022314o6db2b0baua6db543d52f312b6@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Sonny a =E9crit : > Hello > This is a repost, there seems to have a misunderstanding before. >=20 > I hope this is the right place to ask this. Does any know if there is= a > substantial difference in the performance of the traffic controller > between kernel 2.4 and 2.6. We tested it using 1 iperf server and use > 250 and 500 clients, altering the burst. >=20 > This is the set-up: > iperf client - router (w/ traffic controller) - iperf server >=20 > We use the top command inside the router to check the idle time of ou= r > router to see this. The results we got from the 2.4 kernel shows > around 65-70% idle time while the 2.6 shows > 60-65% idle time. We tried to use MRTG and we're not getting any > results either. We want to know if we could improve the bandwidth by > upgrading the kernel, else we would have to get a new bandwidth > manager. Have anyone performed a similar test or can suggest a bette= r > way to do this. Thanks in advance. > - Hi Sonny I am not sure what you are asking here. 65-70% idle time (or 60-65%) is= fine. 2.6 is also not very meaningfull, there are a lot of changes between 2.= 6.0 and=20 2.6.23 :) Why should you upgrade kernel ? What bandwidth do you handle ? What kind of platform is it ? (a new kernel wont help much if its a rea= l old=20 machine, or old NICs) You seem to have some bandwidth problem but focus on cpu affairs...