From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from tuna.sandelman.ca (tuna.sandelman.ca [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id AC1D5200FF5 for ; Fri, 23 Oct 2015 11:41:31 -0700 (PDT) Received: from sandelman.ca (obiwan.sandelman.ca [209.87.249.21]) by tuna.sandelman.ca (Postfix) with ESMTP id A1E3120098; Fri, 23 Oct 2015 14:44:22 -0400 (EDT) Received: by sandelman.ca (Postfix, from userid 179) id E3DEE637F8; Fri, 23 Oct 2015 14:41:28 -0400 (EDT) Received: from sandelman.ca (localhost [127.0.0.1]) by sandelman.ca (Postfix) with ESMTP id D068D637F3; Fri, 23 Oct 2015 14:41:28 -0400 (EDT) From: Michael Richardson To: Richard Smith In-Reply-To: <562A5BE5.6010101@gmail.com> References: <562A5BE5.6010101@gmail.com> X-Mailer: MH-E 8.6; nmh 1.3-dev; GNU Emacs 24.4.2 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 Cc: cerowrt-devel@lists.bufferbloat.net Subject: Re: [Cerowrt-devel] Problems testing sqm 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: Fri, 23 Oct 2015 18:41:54 -0000 Richard Smith wrote: > My test setup: > Laptop<--1000BaseT-->DUT<--1000baseT-->Server So, given that the DUT is the only real constraint in the network, what do you expect to see from this setup? Given that the probably DUT can't forward at Gb/s, and it certainly can't shape anything, it's gonna drop packets, and it's probably gonna drop them in Rx, having overrun the Rx-queue (so tail-drop). If there is too much ram (bufferbloated), then you'll see different results... -- ] Never tell me the odds! | ipv6 mesh networks [ ] Michael Richardson, Sandelman Software Works | network architect [ ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [