From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x235.google.com (mail-qk0-x235.google.com [IPv6:2607:f8b0:400d:c09::235]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 82CA621F60C for ; Fri, 23 Oct 2015 13:18:27 -0700 (PDT) Received: by qkca6 with SMTP id a6so87573150qkc.3 for ; Fri, 23 Oct 2015 13:18:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=sfVhE+WTm4kF116VHuTanfCH0z3S06i/5VPIKm3BPzE=; b=f93vpGowUhsfsLLQYgs8qg93Vg+LfhEQUFXGzf+85YhejYyZYJi/KR2zVJZpJyi3Z1 cBd21jO6HsTomnQqzbfwlN4KV0TzVfWzGUE0MAjXGS0iiIMKy37bXH0vUfmMPQpexQ3j zIvhshou8DYzFX862vW0FZBvNfxkprKC9NYCGWWmetB9ilGVv7eA7Zh3FpryCWx+ITO8 CR5dIJc7ovlvpddqRvM/i4WtqeMbf1NAzoWr3gqq4TjuFDzm6UUtcY/iGGR69Yjfzu6k k6b2VTA4UllaVI1oa2FAezssUskkweyVLfMIns1AtJFXObL6jzOJ9N3jGRBOff3I6iub mtRw== X-Received: by 10.55.217.13 with SMTP id u13mr28056418qki.8.1445631506756; Fri, 23 Oct 2015 13:18:26 -0700 (PDT) Received: from [192.168.1.172] (207-180-163-171.ma.subnet.cable.rcn.com. [207.180.163.171]) by smtp.googlemail.com with ESMTPSA id g140sm727423qhc.22.2015.10.23.13.18.25 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Oct 2015 13:18:25 -0700 (PDT) Message-ID: <562A9611.4050403@gmail.com> Date: Fri, 23 Oct 2015 16:18:25 -0400 From: Richard Smith User-Agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: Michael Richardson References: <562A5BE5.6010101@gmail.com> <12883.1445625688@sandelman.ca> In-Reply-To: <12883.1445625688@sandelman.ca> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit 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 20:18:50 -0000 On 10/23/2015 02:41 PM, Michael Richardson wrote: > 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... Setting ingress/egress to 10Mbit/s I expected to see the speed measurements bounce around those limits with the ping times staying in the low double digits of ms. What I saw however, was the data rates going well past 10Mbit limit and pings up to 2000 ms. This is what I've seen in prior rrul testing using a the 50/10 cable link at our office and my 25(ish)/6 link at my apartment and a well connected server on the net. That however was using QoS and not SQM. Its that a reasonable expectation? -- Richard A. Smith