From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt1-x830.google.com (mail-qt1-x830.google.com [IPv6:2607:f8b0:4864:20::830]) (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 A60513CB35 for ; Thu, 3 Jan 2019 12:18:40 -0500 (EST) Received: by mail-qt1-x830.google.com with SMTP id u47so33024607qtj.6 for ; Thu, 03 Jan 2019 09:18:40 -0800 (PST) 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=1D/e9fSpm6hxiSXuHznHHbNWCL1kb0mZQk0Qzg1Ke5w=; b=CgbWbWvjt1nfOebL9MmoXpGEZaRigmRIu+495/IvjzKPiTcJwwN1e38cjkngNzMc/b FuN5QlQhn7+QCq5VDX36Zo7VbE/anD0Bifdbx/Z2LkxGgiriQdb4r4YbQ1IZYbodB+gT YxPDcW9dYAwjTBr1PV5FdR7I75ZI74UbJLRGjRFG5SFsqZ4wu8EfthdGdIW7h0ymvoyn Ea6b75IRagX7pohInkAI2VpxeGroxhzyr9knSfqPPN6kOSq4As249Z2TsHolSIbMx+Qc ZGQVk1IXSROJYSf5O9lHOoO+HzAVk0nvytv9QWzUP1agrKtp1t3eFKCjWXxaKNeYOk+m TWIQ== 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=1D/e9fSpm6hxiSXuHznHHbNWCL1kb0mZQk0Qzg1Ke5w=; b=iGa6piGWnYQ6NQB1hjUhp3dybIpjoA0VKo4W5aNj/HTmYk0/Lv4EU2ShKyLt3uuCfF WUjWuFyPz3nd8fW0RU+1Awc4s7Mb2cLizeh0JEw14+UjoZ9Yfys5SWzlny73nvw8PM/A AQljrKF5PgBwUItlHBqFZadxsNY4u/hTBGBAjFX4GCUN27wmxXjSiSh/g+v8d/5yjmw2 QVHUgjZd4/uG1kuTJRUb7dRXP4iG9FigTP8uS9aDOx4YCId5knE6A52AC3PnmwP6aZpx KHwHDk6MEc9vz+sWwtlmG9ip+si+aURwVGUvzxBJQK66X92qJIlOA46krgIXtFPIK7gc /Zqw== X-Gm-Message-State: AA+aEWZjhv838iuiJw08iz+zTpUVGOmUFsEqlK0INOiELMR2AXhapoSv I12aK2s9sQGrt9g0a/IqO3qP8HRUb1OQF8LD1qmowg== X-Google-Smtp-Source: ALg8bN4PWoMZCnGyNZqk8Jb/5G45tCURaU6Dzw5pdregr37W1U14U+CjoZplp+OB221FhkMwEybV5/PEUumohXoMi90= X-Received: by 2002:ac8:5314:: with SMTP id t20mr46094671qtn.328.1546535920135; Thu, 03 Jan 2019 09:18:40 -0800 (PST) MIME-Version: 1.0 References: <74C61225-5DA8-46DD-ABB7-D454C7991444@logicalwebhost.com> In-Reply-To: <74C61225-5DA8-46DD-ABB7-D454C7991444@logicalwebhost.com> From: Dave Taht Date: Thu, 3 Jan 2019 09:18:26 -0800 Message-ID: To: Dev Cc: bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] link saturation test failing 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: Thu, 03 Jan 2019 17:18:40 -0000 My guess is your ethernet device does not have BQL. To check, cd /sys/class/net/your_device/queues/tx-0/byte_queue_limits and see if you have a limit other than 0. On Thu, Jan 3, 2019 at 9:16 AM Dev wrote: > > Dev writes: > > > I=E2=80=99m running Debian Buster, trying to saturate a link, enable fq= _codel > > and drop my ping times back down, but they seem to stay high. > > > > I connected machine A and B to a gig switch, then dropped the port > > speed on machine A like: > > > > ethtool -s enp8s0 advertise 0x002 > > > From which machine are you running the test? If your bottleneck is the > > switch, that is where the buffering will happen; FQ-CoDel on the host > > can do nothing about that... > > > -Toke > > I=E2=80=99m running the test from machine A, my Debian Buster server, so = that=E2=80=99s the interface I=E2=80=99ve set to 10Mbps. Basically trying t= o follow the howto on the website, but my ping times aren=E2=80=99t droppin= g once fq_codel is enabled. > > -Dev > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat --=20 Dave T=C3=A4ht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-205-9740