From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryousei Takano Subject: Re: HTB accuracy on 10GbE Date: Thu, 5 Nov 2009 19:15:30 +0900 Message-ID: References: <4AF10B1D.4050604@gmail.com> <4AF110CE.8070701@gmail.com> <4AF1660E.1080401@gmail.com> <4AF1B3CB.1050008@gmail.com> <4AF27A48.4090001@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Stephen Hemminger , Patrick McHardy , Linux Netdev List , takano-ryousei@aist.go.jp To: Eric Dumazet Return-path: Received: from mail-vw0-f192.google.com ([209.85.212.192]:44998 "EHLO mail-vw0-f192.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751081AbZKEKPZ convert rfc822-to-8bit (ORCPT ); Thu, 5 Nov 2009 05:15:25 -0500 Received: by vws30 with SMTP id 30so2237593vws.33 for ; Thu, 05 Nov 2009 02:15:30 -0800 (PST) In-Reply-To: <4AF27A48.4090001@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Hi Eric, On Thu, Nov 5, 2009 at 4:10 PM, Eric Dumazet w= rote: > Ryousei Takano a =E9crit : >> In my experiment, it is not very big problem. =A0I do not send short= packets. >> I got the almost same result in the both cases "mtu 64000" and "mtu >> 40000 quantum 60000". >> >> Anyway, setting larger mtu size than the physical mtu does not quiet= make sense. >> > > tc class mtu is a hint given to stack, about average packet size, ie = not > related to physical MTU (because of TSO) > > You could use same mtu, but disable tso on device > I got it. Thanks for your explanation. Best regards, Ryousei