From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from tuna.sandelman.ca (unknown [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) by huchra.bufferbloat.net (Postfix) with ESMTP id 9B9D1208ABD for ; Tue, 29 Jan 2013 08:06:20 -0800 (PST) Received: from sandelman.ca (unknown [IPv6:2607:f0b0:f:2::247]) by tuna.sandelman.ca (Postfix) with ESMTP id 483F920178 for ; Tue, 29 Jan 2013 11:11:47 -0500 (EST) Received: by sandelman.ca (Postfix, from userid 179) id 6D43E63765; Tue, 29 Jan 2013 11:05:21 -0500 (EST) Received: from sandelman.ca (localhost [127.0.0.1]) by sandelman.ca (Postfix) with ESMTP id 5E4F4636B6 for ; Tue, 29 Jan 2013 11:05:21 -0500 (EST) From: Michael Richardson To: bloat X-Mailer: MH-E 8.3; nmh 1.3-dev; XEmacs 21.4 (patch 22) X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0; <'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m Sender: mcr@sandelman.ca Subject: [Bloat] Debian wheezy; linux 3.2-debian to include codel 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: Tue, 29 Jan 2013 16:06:20 -0000 maybe not news... http://womble.decadent.org.uk/blog/whats-in-the-linux-kernel-for-debian-70-wheezy-part-1.html says: Bufferbloat I backported two big pieces of the solution to bufferbloat: Byte Queue Limits (BQL) allows network drivers to reduce unnecessary buffering in their hardware transmit queues. This has been implemented in the bnx2, bnx2x, e1000e, forcedeth, igb, ixgbe, sfc, skge and tg3 drivers in Linux 3.3 onwards. Documentation is in the commit that added it, but you're unlikely to need it. The CoDel queue management algorithm can reduce unnecessary buffering in software transmit queues. FQ CoDel adds an element of 'fairness' between multiple network flows. These were implemented as the queue disciplines codel and fq_codel in Linux 3.5. They can be selected using the tc command, e.g.: tc qdisc replace dev eth0 root fq_codel