From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x231.google.com (mail-ob0-x231.google.com [IPv6:2607:f8b0:4003:c01::231]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 59C4421F1D4 for ; Thu, 14 May 2015 16:42:16 -0700 (PDT) Received: by obcus9 with SMTP id us9so64975999obc.2 for ; Thu, 14 May 2015 16:41:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=BxfChRVw2vCdZVjlrNcFJ6wFv7X8qOj2xoG+SVJDUUU=; b=WjssSc+2qqsXecVmND4nOkjFVDZ4nX7XAm5XsoKKhzYfQN1RsTd9nHGlbc9MJ59yR2 bhBcJulrM22AzHAQX+mbznQ5EOV4A/xfRd/uxKsBVjrGVnU68hI5shGGuswwPlrA8H9I v/tEnrc0ngdJvW/yBUDB68TAzeY2z1ZuB2E24XzxKX9llRcZmtkEqQUJgynQc7s0QP4P LK+VcDqXHMH3YRhJYi2Yvu9Dx+XpVgWgHUaDCMQGQtE5p3TjRmnKwFzmlcoJ0N5L+lOZ MhQgXoFyAsZrqUWile90hY9gWHwR8tDpwAeXdRBM/pN11pzKzgVPi1LtbTTVq1q+mUKk 7IsA== MIME-Version: 1.0 X-Received: by 10.202.71.84 with SMTP id u81mr5393173oia.81.1431646916627; Thu, 14 May 2015 16:41:56 -0700 (PDT) Received: by 10.202.71.139 with HTTP; Thu, 14 May 2015 16:41:56 -0700 (PDT) In-Reply-To: <55552014.2010808@darbyshire-bryant.me.uk> References: <55552014.2010808@darbyshire-bryant.me.uk> Date: Thu, 14 May 2015 16:41:56 -0700 Message-ID: From: Dave Taht To: Kevin Darbyshire-Bryant Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: bloat Subject: Re: [Bloat] tc -s qdisc questions X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 May 2015 23:42:49 -0000 On Thu, May 14, 2015 at 3:22 PM, Kevin Darbyshire-Bryant wrote: > Hi Chaps, > > Further to Dave's recent request for 'tc -s qdisc' stats looking at drops= vs > ecn marks, please could someone take a look at these and explain to this > idiot quite what is going on? This is a particularly slow & ratty ADSL l= ine > providing my parents internet 'service'. Before I got hold of it with > OpenWrt CC trunk + cake jammed in it, 6 seconds of bufferbloat was not > uncommon. I'm using the default sqm scripts that arrive with the > 'ceropackages' repo (used as a source of patched iproute2, cake, etc) In > essence 2 questions: 1) Why no ECN marks, only drops? http://www.bufferbloat.net/projects/cerowrt/wiki/Enable_ECN > 2) What falls into > diffserv class 0 (alias, why has nothing used it?) depends. > > Your time, patience etc is greatly appreciated. > > Kevin > > root@Router:~# tc -s qdisc show dev pppoa-wan > qdisc cake 803a: root refcnt 2 bandwidth 256Kbit diffserv4 flows > Sent 1928303 bytes 12121 pkt (dropped 73, overlimits 6915 requeues 0) > backlog 0b 0p requeues 0 > Class 0 Class 1 Class 2 Class 3 > rate 256Kbit 240Kbit 192Kbit 64Kbit > target 70.5ms 75.2ms 94.0ms 282.0ms > interval 564.0ms 601.6ms 752.0ms 2.3s > Pk delay 0us 91.4ms 17.5ms 3.2ms > Av delay 0us 2.9ms 2.9ms 53us > Sp delay 0us 5us 136us 7us > pkts 0 11754 408 32 > way inds 0 0 0 0 > way miss 0 347 404 5 > way cols 0 0 0 0 > bytes 0 1973100 28163 6537 > drops 0 73 0 0 > marks 0 0 0 0 > qdisc ingress ffff: parent ffff:fff1 ---------------- > Sent 8221609 bytes 11969 pkt (dropped 6, overlimits 0 requeues 0) > backlog 0b 0p requeues 0 > root@Router:~# tc -s qdisc show dev ifb4pppoa-wan > qdisc cake 803b: root refcnt 2 bandwidth 1512Kbit besteffort flows > Sent 7597496 bytes 11494 pkt (dropped 482, overlimits 10487 requeues 0) > backlog 0b 0p requeues 0 > Class 0 > rate 1512Kbit > target 12.0ms > interval 112.0ms > Pk delay 3.3ms > Av delay 289us > Sp delay 5us > pkts 11976 > way inds 0 > way miss 769 > way cols 0 > bytes 8270163 > drops 482 > marks 0 > > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat > --=20 Dave T=C3=A4ht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67