From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.taht.net (mail.taht.net [IPv6:2a01:7e00::f03c:91ff:feae:7028]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 3B4323B2A4 for ; Sat, 16 Jul 2016 06:51:27 -0400 (EDT) Received: from dhcp-8eac.meeting.ietf.org (dhcp-8eac.meeting.ietf.org [31.133.142.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.taht.net (Postfix) with ESMTPSA id 5F37421326 for ; Sat, 16 Jul 2016 10:51:26 +0000 (UTC) To: cake@lists.bufferbloat.net References: <5789FFEF.9010408@darbyshire-bryant.me.uk> From: =?UTF-8?Q?Dave_T=c3=a4ht?= Message-ID: Date: Sat, 16 Jul 2016 12:59:22 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <5789FFEF.9010408@darbyshire-bryant.me.uk> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Cake] Cake strange behaviour X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 16 Jul 2016 10:51:27 -0000 I would repeat the same test with htb+fq_codel. On 7/16/16 11:35 AM, Kevin Darbyshire-Bryant wrote: > Hi guys, > > Encountering some behaviour that I don't understand. Line is a 40/10 > cake limited to 39000/9840. Overheads 12, 'dual-dsthosts' in ingress, > 'dual-srcshosts' on engress - limiting the on the WAN line. Take a look > at my ping response graph > > http://www.thinkbroadband.com/ping/share/9822cb5160582fa6abee29b60d807766-16-07-2016.html > > > Around 20:30 I fired up a windows machine that was behind on its updates > so it generated a bit of ingress traffic. Note the comparatively high > latency (40ms) and stupidly high ping packet loss (50%) The 3-5ms > steady (blue) latency you can see is a system backup (so egress traffic) > running till around 23:00. > > The really strange bit is that cake stats show it has only dropped 10 > (yes 10!) packets. > > I'm not the only person encountering 'interesting' behaviour with regard > to windows updates inducing high latency and high packet loss. It's as > if cake weren't there managing flows and this is the ISP's rate limiter > in action. > > Kevin > > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake