From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Salsano Subject: [PATCH] netem/iproute2 solving correlated loss issues [0/5] Date: Fri, 18 Dec 2009 11:39:13 +0100 Message-ID: <4B2B5BD1.7040602@uniroma2.it> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Fabio Ludovici To: netdev@vger.kernel.org Return-path: Received: from smtp.uniroma2.it ([160.80.6.16]:56729 "EHLO smtp.uniroma2.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752216AbZLRKpm (ORCPT ); Fri, 18 Dec 2009 05:45:42 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Dear all, we are going to send a patch that enhances netem module and the iproute2 utilities. Our aim is to fix the problems with correlated loss generation in netem (as for example described in https://lists.linux-foundation.org/pipermail/netem/2007-September/001156.html) We have now included a more general loss model, as described in: http://netgroup.uniroma2.it/twiki/bin/view.cgi/Main/NetEm2 The patch is backward compatible, we have not removed the previous correlated loss generated approach (though its use should be deprecated), nor we have changed anything else in the existing netem module. Within our patch for iproute2 we also added a man page for netem (it was missing) in which we have pasted the existing documentation for netem and the usage of our model. We had posted this work on the netem mailing list some months ago as a separate netem2 module... we received some feedback and made some bug fix since then. We believe the work is now ready to be inserted in the main netem/iproute2 development. We will post in next messages the patches to netem module for 2.6.32 kernel and to 2.6.29 iproute2 (find below the list) Comments are welcome. Best regards, Stefano and Fabio netem kernel module patches: patch 1/5 : linux-2.6.32/include/linux/pkt_sched.h patch 2/5 : net/sched/sch_netem.c iproute2 utilities patches: patch 3/5 : iproute2-2.6.29-1/include/linux/pkt_sched.h patch 4/5 : iproute2-2.6.29-1/man/man8/tc-netem.8 patch 5/5 : iproute2-2.6.29-1/tc/q_netem.c -- ******************************************************************* Stefano Salsano Dipartimento Ingegneria Elettronica Universita' di Roma "Tor Vergata" Via del Politecnico, 1 - 00133 Roma - ITALY http://netgroup.uniroma2.it/Stefano_Salsano/ E-mail : stefano.salsano@uniroma2.it Cell. : +39 320 4307310 Office : (Tel.) +39 06 72597770 (Fax.) +39 06 72597435 *******************************************************************