From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756835AbYEODA5 (ORCPT ); Wed, 14 May 2008 23:00:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753681AbYEODAq (ORCPT ); Wed, 14 May 2008 23:00:46 -0400 Received: from ipmail04.adl2.internode.on.net ([203.16.214.57]:25179 "EHLO ipmail04.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753594AbYEODAp (ORCPT ); Wed, 14 May 2008 23:00:45 -0400 X-Greylist: delayed 303 seconds by postgrey-1.27 at vger.kernel.org; Wed, 14 May 2008 23:00:45 EDT X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAGxCK0iWZR7i/2dsb2JhbACuUg X-IronPort-AV: E=Sophos;i="4.27,489,1204464600"; d="scan'208";a="112635300" Message-ID: From: "Kingsley Foreman" To: Subject: NET_SCHED cbq dropping too many packets on a bonding interface Date: Thu, 15 May 2008 12:25:19 +0930 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ive been using qdisc for quite a while without any problems, I just rebuilt a gentoo box with 2.6.25 kernel that does a lot of traffic ~1000mbits+ over a bonded interface Im however seeing a big problem with cbq class dropping packets for no reason i can see, and it is causing a lot of speed issues. the basic config is this _____________________________________________________________________ /sbin/tc qdisc del dev bond0 root /sbin/tc qdisc add dev bond0 root handle 1 cbq bandwidth 2000Mbit avpkt 1000 cell 8 /sbin/tc class change dev bond0 root cbq weight 200Mbit allot 1514 /sbin/tc class add dev bond0 parent 1: classid 1:1280 cbq bandwidth 2000Mbit rate 1200Mbit weight 120Mbit prio 1 allot 1514 cell 8 maxburst 120 minburst 1 minidle 0 avpkt 1000 bounded /sbin/tc filter add dev bond0 parent 1:0 protocol ip prio 300 route to 5 classid 1:1280 /sbin/tc class add dev bond0 parent 1: classid 1:1281 cbq bandwidth 2000Mbit rate 400Mbit weight 40Mbit prio 6 allot 1514 cell 8 maxburst 120 minburst 1 minidle 0 avpkt 1000 bounded /sbin/tc filter add dev bond0 parent 1:0 protocol ip prio 300 route to 6 classid 1:1281 ____________________________________________________________________ So there is a lot of bandwidth handed out but it is still dropping a lot of packets for very small ammounts of traffic eg 300mbits. However the biggest problem im seeing is if i just do this __________________________________________________________________ /sbin/tc qdisc del dev bond0 root /sbin/tc qdisc add dev bond0 root handle 1 cbq bandwidth 2000Mbit avpkt 1000 cell 8 /sbin/tc class change dev bond0 root cbq weight 200Mbit allot 1514 ___________________________________________________________________ after 30sec I get results like ___________________________________________________________________ ### bond0: queueing disciplines qdisc cbq 1: root rate 2000Mbit (bounded,isolated) prio no-transmit Sent 574230043 bytes 407156 pkt (dropped 2524, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 3 undertime 0 ### bond0: traffic classes class cbq 1: root rate 2000Mbit (bounded,isolated) prio no-transmit Sent 574330783 bytes 407225 pkt (dropped 2525, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 3 undertime 0 __________________________________________________________________ I can't for the life if me work out why it is dropping so many packets for while doing so little traffic when i enable cbq the transfer rate drops by approx 30%, any help would be great, and any improvements to my command lines would be good also. Kingsley Foreman