From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-x72a.google.com (mail-qk1-x72a.google.com [IPv6:2607:f8b0:4864:20::72a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 5CC5C3BA8E for ; Thu, 6 Sep 2018 18:58:23 -0400 (EDT) Received: by mail-qk1-x72a.google.com with SMTP id c126-v6so8535986qkd.7 for ; Thu, 06 Sep 2018 15:58:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=M1iXAIdHaQhjy8r8V3sK0bRfvqbmhzZf/+xcynI0Hfg=; b=JgolwOYcJUnp33i11GMbpihLAu9/LTynJHAI8y/wv/NqWqM4C3wWJgyETbJ3LRyioQ SzwTcu2dessQ0atgFrtNm1R55Rag/Lal7mGLwdvXWT+e6zmKUuOoCV5NK1ukfDAdbVJ6 xSzsjrv2xl0XU4jhaLkmqmWCRVr6buygcXzM0mYHrkjANkrE+gdNClka+VHrHk8UMSca ugQxoSSxnrDO6iyH4L/iypWTPU6iOJdQtXuHbjhfyLSxyZYFbegWpF/lsORQ47BsyqeT azire+I/PjBnD0wsN7R/GJyV3nh5iGIogyfflOIeYxM3+8eW7FGWEsbWiuKLG9Vy9D19 10Lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=M1iXAIdHaQhjy8r8V3sK0bRfvqbmhzZf/+xcynI0Hfg=; b=A7LTV51xHWI0cbx28LYSrQnHcdI0PsdGF+Fz8xYAKjbr6fcKu1Tp/31rda35rjdGqB HaTLCinVIIJzJg884u51fPsI5p4ZwbWeFLBIYcCCBLUx0K+GKzKJLytP4quwr9J2/qzy s+duVRclhgts3BTp8tFCOajGIeR25v5ZahU3TsP9QEfDmeTlNkfBrGxbYeNEziXOaeh8 PI44UAS4xaf9vQ+QG2UkudmzNgWVnNfQJIJgKZ1t/pJaCvOoXcbG2ROItNE6ZdYqDCDN MbueFxhYJuaZvQAhX+91OYVzwqqs0Hu1nu+fdGqkkVTXn5IvYYfnCaU1O58vbdopJqyn YX3g== X-Gm-Message-State: APzg51DFnQr0fl/Qa4DOHvWyBnFRPAtUfyeVrCK+uKerBVmBtlcB2mBK g8/LJgOuwqyvF/YSn7oHO+EuOp3U8TVJWg8vLfEnEw== X-Google-Smtp-Source: ANB0VdZEpbgoQbJcOT6A80QxCk7+wf5ySE0tKJiX8VyMwuwysicAz8UCXLkft68gZ0U94pP8ZtoqH8FSG5x0bSXfog0= X-Received: by 2002:a37:4ed8:: with SMTP id c207-v6mr3757989qkb.164.1536274702869; Thu, 06 Sep 2018 15:58:22 -0700 (PDT) MIME-Version: 1.0 References: <2CB335A2-E18F-430F-9331-9AD9B3238D84@heistp.net> In-Reply-To: <2CB335A2-E18F-430F-9331-9AD9B3238D84@heistp.net> From: Dave Taht Date: Thu, 6 Sep 2018 15:58:10 -0700 Message-ID: To: Pete Heist Cc: Cake List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Cake] FreeNet backhaul 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: Thu, 06 Sep 2018 22:58:23 -0000 Heh. esfq was "best in class" for a very, very long time. I have years of mrtg data on my network that I haven't looked at in years..= .. On Thu, Sep 6, 2018 at 3:37 PM Pete Heist wrote: > > I met with the FreeNet Liberec admins earlier this week, and am just star= ting to get the first IRTT / SmokePing probe data from a few backhaul route= rs. I=E2=80=99ll see if I can get snapshots of the SmokePing pages public s= omewhere, but for now... > > https://www.heistp.net/downloads/jerab_ping.pdf > > https://www.heistp.net/downloads/jerab_irtt.pdf > > On this router, there are various =E2=80=9Cevents=E2=80=9D that occur wit= h RTT spikes, and in general, UDP RTT maximums appear quite a bit higher th= an those for ICMP. I speculate that at least some of these events may be bl= oat, but can=E2=80=99t be sure yet. > > This router is an old ALIX with kernel 2.6.26, but on the other hand it d= oes have hfsc + esfq (a variant of sfq with host fairness) deployed, so if = it=E2=80=99s actually controlling the queue, one might suspect that sfq it = could control inter-flow latency at least somewhat. > > I feel the need for better data than this, but this is at least a first l= ook for me at bloat in an ISP=E2=80=99s backhaul. The =E2=80=9Celaborate=E2= =80=9D plan is to gather data for a while, deploy sqm in a couple places (I= hope for cake, but the kernel will need to be upgraded on this one), and s= ee what happens=E2=80=A6 :) > > Pete > > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619