From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x22b.google.com (mail-qt0-x22b.google.com [IPv6:2607:f8b0:400d:c0d::22b]) (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 B974F3B2A4 for ; Sat, 30 Jun 2018 07:22:50 -0400 (EDT) Received: by mail-qt0-x22b.google.com with SMTP id l10-v6so10149728qtj.0 for ; Sat, 30 Jun 2018 04:22:50 -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=DZxq44H7AunDdekZwbXHZjhxtvLSKz4C1YS/v7FiGO4=; b=NMIpbrkrwIo8dPs4ZKHMmYeSOWHW9zgs7Zh6hXkvCsRZ8tANsElMIdZdExzHcquMLD IQfJrmcE2lrP7P2WtwPvgsZYQ5VIz3Y4iElc4+PdGIPxmPwUxArTJxZxj0ZbGSA3EO9r 8ObsA2kKjVODVgw23fV1Y3yRRVZg3I9tXlJkD82gUaNn3S1iLGnJTU/XTDhINspsJNVy DM/ZJeZ1gMzoC9/JXp51UK+m8LKwisUNuNDCQdxECoj2UaH5FcOfcS33ZrB9PliJKErn DoHk1aP4fyk24x+HBaLz4n9o/EcbMFWTfTAxmYPsvGpj86AVtP3BVm4zfapvMhfpy/nQ fVEQ== 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=DZxq44H7AunDdekZwbXHZjhxtvLSKz4C1YS/v7FiGO4=; b=VHlYSTB7lkuxaDYsofJsi2NxiWIXxGKAN/5k7pKpbeZo8eYpIIz/tgt2g6Ooor74d1 ir2m7WeddviR4g86fB72mtm8A0UDjqeCtky+2WMyd7Mf4t9T8kBj6H5hfd+z+kwxo7g+ dJGra4XAiaFYYnCH3s1mv/cknzuLPDqtqc2RbDV0EaVVKmzt/Dzkou+hFDKoWVPNJbP6 ZefXqgf4Vqc6CpIvlY/vrYGD9XCMQia9b0pliV4O3Lw+93vPnW5rkv1vesNGjtmRVXLf w5QAUiJcr68zh7qzXLLbJaf84pnKb24L0KoHazcgt62FqoIGTJhstGvOUj4GHd1M7cPz 5Uew== X-Gm-Message-State: APt69E2oUqJOhjGsDZEvYz1FK+gi8NHf0mOLUWr6nvB5RrUz4k1w0Tdq Ofx3mEQD5uZlMkqc65NI97V6TVD8astsBcWRn+s= X-Google-Smtp-Source: AAOMgpcFbmYnOT8/FORqePsBDv6+83bSQSGiQ6xvHb/8DYat+iOieperAZMyfxmzc8ljwSc5hkoGslxZRJ7SyYVTeDM= X-Received: by 2002:aed:3c8c:: with SMTP id d12-v6mr5993076qtf.203.1530357770307; Sat, 30 Jun 2018 04:22:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Sat, 30 Jun 2018 07:22:38 -0400 Message-ID: To: Pete Heist Cc: =?UTF-8?Q?Jonas_M=C3=A5rtensson?= , bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] powerboost and sqm X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Jun 2018 11:22:50 -0000 or, like... just ask 'em? On Sat, Jun 30, 2018 at 3:46 AM Pete Heist wrote: > > > On Jun 30, 2018, at 8:26 AM, Jonas M=C3=A5rtensson wrote: >> >> > I played around with flent a bit, here are some example plots: > > https://dl.dropbox.com/s/facariwkp5x5dh1/flent.zip?dl=3D1 > > The short spikes are not seen with flent so I'm led to believe these are = just a result of running the "Hi-Res" dslreports test in a browser. In the = flent rrul test, up to about 10 ms induced latency can be seen during the "= powerboost" phase but after that it is almost zero. I'm curious about how t= his is implemented on the ISP side. If anything, sqm seems to induce a bit = more latency during the "steady-state" phase. > > > You may also want to try running flent with --socket-stats and making a t= cp_rtt plot. You should see a significant difference in TCP RTT between sfq= and anything that uses CoDel. > > Also, double check the basics- that you=E2=80=99re truly in control of th= e queue and the device running sqm isn=E2=80=99t running out of CPU and has= solid device drivers that aren=E2=80=99t causing periodic pauses or other = anomalies (which also follows for your client device). I=E2=80=99ve been si= deswiped by such things before when testing sqm, and making theory and expe= riment fully agree can take science and time. > > Pete > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619