From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa0-x22c.google.com (mail-oa0-x22c.google.com [IPv6:2607:f8b0:4003:c02::22c]) (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 799BA21F442; Sat, 30 Aug 2014 15:30:29 -0700 (PDT) Received: by mail-oa0-f44.google.com with SMTP id o6so2808163oag.31 for ; Sat, 30 Aug 2014 15:30:28 -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; bh=FY74FLkEHKU3CY5Cz3CjULSISmzqinw1MTG2wxXrIPs=; b=fs8ilZqQ80lxIeU8naUysg2UMOWZnhdb+8sgZOE07h7UAGI8JWknTu+rsYRkP5EJGM UBwjLJPXCGwKB1WtnbFD+fVTODihzFTK1ay1oeVPECTbQB6TXAMe7CApuJmj7Jt6qgO7 sMbAK5faooylyK7WhGjh+8Ip2NEs+jNSc+s1+ZXShDWHWqhpZ4f9SDPXyN2acjwmalNa Qb32hrFoEPzPoom7jtUIQO9tzOXI/VxRsKRMniMJosQWNtbSuRzILIQmJUZhVneSygsx /MeLJzhCG4suHLUUnEMj2i+WU8x2l7hHQU64CflkbDcVlNEfomCm02x6dPkRPD0sznYC xTjQ== MIME-Version: 1.0 X-Received: by 10.60.65.35 with SMTP id u3mr18460619oes.35.1409437828763; Sat, 30 Aug 2014 15:30:28 -0700 (PDT) Received: by 10.202.227.76 with HTTP; Sat, 30 Aug 2014 15:30:28 -0700 (PDT) Received: by 10.202.227.76 with HTTP; Sat, 30 Aug 2014 15:30:28 -0700 (PDT) In-Reply-To: <4DA71387-6720-4A2F-B462-2E1295604C21@gmail.com> References: <87ppfijfjc.fsf@toke.dk> <4FF4917C-1B6D-4D5F-81B6-5FC177F12BFC@gmail.com> <4DA71387-6720-4A2F-B462-2E1295604C21@gmail.com> Date: Sat, 30 Aug 2014 15:30:28 -0700 Message-ID: From: Dave Taht To: Jonathan Morton Content-Type: multipart/alternative; boundary=001a11c257581dd7440501e05114 Cc: cerowrt-devel@lists.bufferbloat.net, bloat Subject: Re: [Bloat] Comcast upped service levels -> WNDR3800 can't cope... 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: Sat, 30 Aug 2014 22:30:29 -0000 --001a11c257581dd7440501e05114 Content-Type: text/plain; charset=UTF-8 Could I get you to also try HFSC? On Aug 30, 2014 1:48 PM, "Jonathan Morton" wrote: > > On 30 Aug, 2014, at 8:33 pm, Jonathan Morton wrote: > > > I'll need to investigate more closely to see whether there's a CPU load > difference between HTB and TBF in practice. > > Replying to myself, but... > > The surprising result is that TBF seems to consume about TWICE the CPU > time, at the same bandwidth, as HTB does. Even FQ in flow-rate-limit mode > is roughly on par with HTB on that score. There is clearly something very > wrong with how TBF is doing it. > > HTB (running with only a default class) and FQ are both able to send and > regulate 200Mbps using about an eighth of a 1.5GHz PowerPC, all told. It > doesn't even seem to matter which qdisc I slap on top of HTB. TBF needs > almost a quarter of the same CPU to do the same thing. > > - Jonathan Morton > > --001a11c257581dd7440501e05114 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Could I get you to also try HFSC?

On Aug 30, 2014 1:48 PM, "Jonathan Morton&q= uot; <chromatix99@gmail.com= > wrote:

On 30 Aug, 2014, at 8:33 pm, Jonathan Morton wrote:

> I'll need to investigate more closely to see whether there's a= CPU load difference between HTB and TBF in practice.

Replying to myself, but...

The surprising result is that TBF seems to consume about TWICE the CPU time= , at the same bandwidth, as HTB does.=C2=A0 Even FQ in flow-rate-limit mode= is roughly on par with HTB on that score.=C2=A0 There is clearly something= very wrong with how TBF is doing it.

HTB (running with only a default class) and FQ are both able to send and re= gulate 200Mbps using about an eighth of a 1.5GHz PowerPC, all told.=C2=A0 I= t doesn't even seem to matter which qdisc I slap on top of HTB.=C2=A0 T= BF needs almost a quarter of the same CPU to do the same thing.

=C2=A0- Jonathan Morton

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