Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758999Ab1CCWdu (ORCPT ); Thu, 3 Mar 2011 17:33:50 -0500 Received: from g1t0027.austin.hp.com ([15.216.28.34]:28772 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758868Ab1CCWds (ORCPT ); Thu, 3 Mar 2011 17:33:48 -0500 Subject: Re: ANNOUNCE: debloat-testing kernel git tree From: Rick Jones Reply-To: rick.jones2@hp.com To: Tianji Li Cc: Dave =?ISO-8859-1?Q?T=E4ht?= , sedat.dilek@gmail.com, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, bloat-devel@lists.bufferbloat.net, linux-kernel@vger.kernel.org In-Reply-To: <4D6FEFD4.9010608@nuim.ie> References: <20110225222210.GA3618@tuxdriver.com> <87fwr9jxya.fsf@cruithne.co.teklibre.org> <8739n9ii7z.fsf@cruithne.co.teklibre.org> <87tyfph2az.fsf@cruithne.co.teklibre.org> <1299176168.2157.14.camel@tardy> <4D6FEFD4.9010608@nuim.ie> Content-Type: text/plain; charset="UTF-8" Date: Thu, 03 Mar 2011 14:33:43 -0800 Message-ID: <1299191623.2157.62.camel@tardy> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1200 Lines: 30 On Thu, 2011-03-03 at 13:45 -0600, Tianji Li wrote: > > On 03/03/2011 12:16 PM, Rick Jones wrote: > >> For wireless routers and cable home gateways especially, this research > >> shows that the total un-managed buffers in your system should be less > >> than 32. > > > > Would it be a good thing to start describing these queues not so much in > > terms of packets but in terms of delay (or bandwidth X delay)? > > > > The unit of bandwidth is something like Mbps, that of delay can be > second, so bandwidth X delay --> Mb, which is the unit of packet size. > So both packets and delay should have the same effect for sizing buffers. Yet, not all packets are not created equal - in size. So, 42, 150 byte packets queued is not the same as 42, 1500 byte packets. However, 10, 1500 byte packets is the same as 100, 150 byte packets. Had you said something like MB and delay should have the same effect I would have agreed with you :) rick jones -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/