From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: tbf/htb qdisc limitations Date: Sat, 16 Oct 2010 00:05:35 +0200 Message-ID: <20101015220535.GA1997@del.dom.local> References: <4CB4DE6E.7030802@hp.com> <20101013062649.GA6915@ff.dom.local> <20101013233653.1e363692.billfink@mindspring.com> <20101014064404.GA6219@ff.dom.local> <20101014031354.e172d737.billfink@mindspring.com> <20101014080939.GA7710@ff.dom.local> <20101014085005.GA8349@ff.dom.local> <20101015023749.f085006b.billfink@mindspring.com> <1287125059.2659.1812.camel@edumazet-laptop> <20101015173746.12c7c40a.billfink@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Eric Dumazet , Rick Jones , Steven Brudenell , netdev@vger.kernel.org To: Bill Fink Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:39845 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751039Ab0JOWFs (ORCPT ); Fri, 15 Oct 2010 18:05:48 -0400 Received: by wyb28 with SMTP id 28so1109808wyb.19 for ; Fri, 15 Oct 2010 15:05:46 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20101015173746.12c7c40a.billfink@mindspring.com> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, Oct 15, 2010 at 05:37:46PM -0400, Bill Fink wrote: ... > i7test7% tc -s -d qdisc show dev eth2 > qdisc prio 1: root refcnt 33 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 > Sent 11028687119 bytes 1223828 pkt (dropped 293, overlimits 0 requeues 0) > backlog 0b 0p requeues 0 > qdisc tbf 10: parent 1:1 rate 8900Mbit burst 1112500b/64 mpu 0b lat 4295.0s > Sent 11028687077 bytes 1223827 pkt (dropped 293, overlimits 593 requeues 0) > backlog 0b 0p requeues 0 > > I'm not sure how you can have so many dropped but not have > any TCP retransmissions (or not show up as requeues). But > there's probably something basic I just don't understand > about how all this stuff works. Me either, but it seems higher "limit" might help with these drops. Jarek P.