From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: NET_SCHED cbq dropping too many packets on a bonding interface Date: Fri, 16 May 2008 05:49:59 +0000 Message-ID: <20080516054959.GA3918@ff.dom.local> References: <20080515091216.GA6550@ff.dom.local> <8ECDBB4EB5394859BFFACAAEE3A6EDB0@uglypunk> <482C6040.9030808@trash.net> <20080515182504.GB2936@ami.dom.local> <482C81CC.7000305@trash.net> <20080515184646.GC2936@ami.dom.local> <1A70765F4B30462EB21A3B3A8A442633@uglypunk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Patrick McHardy , Eric Dumazet , Andrew Morton , linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: Kingsley Foreman Return-path: Received: from nf-out-0910.google.com ([64.233.182.184]:19780 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751008AbYEPFqa (ORCPT ); Fri, 16 May 2008 01:46:30 -0400 Received: by nf-out-0910.google.com with SMTP id d3so297121nfc.21 for ; Thu, 15 May 2008 22:46:28 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1A70765F4B30462EB21A3B3A8A442633@uglypunk> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, May 16, 2008 at 06:57:23AM +0930, Kingsley Foreman wrote: ... > running > > tc qdisc add dev bond0 root pfifo limit 1000 > > or > > tc qdisc add dev bond0 root handle 1: cbq bandwidth 2000Mbit avpkt 1000 > cell 0 > tc qdisc add dev bond0 parent 1: pfifo limit 1000 > > > doesn't appear to be dropping packets. > Great! So it looks like there is no error here unless there are needed significantly bigger queues to stop this dropping compared to 2.6.22. You could try to lower this limit now to something like 10 to find when drops start to appear. Why 2.6.22 doesn't need this at all is a mistery anyway (old scheduler?), and it would really need some work (like git bisection) to find the reason for more than 5 or 10 packet difference. Thanks, Jarek P.