From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vn0-x235.google.com (mail-vn0-x235.google.com [IPv6:2607:f8b0:400c:c0f::235]) (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 AE53921F3E2 for ; Thu, 14 May 2015 06:49:35 -0700 (PDT) Received: by vnbf7 with SMTP id f7so327172vnb.13 for ; Thu, 14 May 2015 06:49:26 -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=tOyCELbh9dtvCTgnxYB1kk4eXUfaoe0Zwn6v2zQ39cs=; b=HS1wGmsrXbiX25uvCJgY+8XDTPBm2zpvEtbcqa8oo1BRh9DxzUucETVQPCGtumHb6k AJMJ/zz4ps71plmS5xQ9zAyEI/5fhtfFk0NuOhPAeZSzWtpH0GJh0PUI/xwM+zvdSPe3 XfbzHcUT6F2WgkIin+h3VPkpWnWc6ixXenDwijt1HXDYRt5FL5OQw92aTonilVoSiL2C FrB2XHsQ0htDjFe4/bldCK1b3IErw6/I5zbcNeq1zvmRKEJNsjzsSU54yHMS5NZNuWbI d8JSxaJW3e/9tCXZJddeqIfN+MS9z1OiI4D20Mjxqma0xOJOGeM4FZvcl5/wC8oYvtxs bwBw== MIME-Version: 1.0 X-Received: by 10.52.34.228 with SMTP id c4mr4016202vdj.42.1431611366378; Thu, 14 May 2015 06:49:26 -0700 (PDT) Received: by 10.52.12.167 with HTTP; Thu, 14 May 2015 06:49:26 -0700 (PDT) Received: by 10.52.12.167 with HTTP; Thu, 14 May 2015 06:49:26 -0700 (PDT) In-Reply-To: <5554A484.1090201@gmail.com> References: <554F64E1.6000609@gmail.com> <554F9594.60808@gmail.com> <50DB1E31-61AE-4298-B80F-8C6F7487C99B@gmail.com> <002A5BFC-5511-4995-8785-370251F24083@gmx.de> <555479DE.90806@gmail.com> <51BC816B-2177-4EB2-921B-AA91345ADF2A@gmail.com> <55547DDC.7000303@gmail.com> <55549EA0.1050007@gmail.com> <5554A484.1090201@gmail.com> Date: Thu, 14 May 2015 16:49:26 +0300 Message-ID: From: Jonathan Morton To: Alan Jenkins Content-Type: multipart/alternative; boundary=20cf30780ad8f3150905160afe72 Cc: cerowrt-devel Subject: Re: [Cerowrt-devel] [Cake] openwrt build with latest cake and other qdiscs X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 May 2015 13:50:07 -0000 X-List-Received-Date: Thu, 14 May 2015 13:50:07 -0000 X-List-Received-Date: Thu, 14 May 2015 13:50:07 -0000 X-List-Received-Date: Thu, 14 May 2015 13:50:07 -0000 --20cf30780ad8f3150905160afe72 Content-Type: text/plain; charset=UTF-8 Ah - looking at it from that perspective, your largest packet includes a 1500 byte payload, 40 bytes of PPPoE framing, and 44 more bytes of AAL5 padding, all wrapped up in 33 ATM cells. With even slightly less overhead or a fractionally reduced payload, you'd go down to 32 cells. - Jonathan Morton --20cf30780ad8f3150905160afe72 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Ah - looking at it from that perspective, your largest packe= t includes a 1500 byte payload, 40 bytes of PPPoE framing, and 44 more byte= s of AAL5 padding, all wrapped up in 33 ATM cells. With even slightly less = overhead or a fractionally reduced payload, you'd go down to 32 cells.<= /p>

- Jonathan Morton

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