From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp64.iad3a.emailsrvr.com (smtp64.iad3a.emailsrvr.com [173.203.187.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 040A33CB35 for ; Thu, 3 Jan 2019 16:17:20 -0500 (EST) Received: from smtp17.relay.iad3a.emailsrvr.com (localhost [127.0.0.1]) by smtp17.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id C924B2558E; Thu, 3 Jan 2019 16:17:19 -0500 (EST) X-SMTPDoctor-Processed: csmtpprox beta Received: from smtp17.relay.iad3a.emailsrvr.com (localhost [127.0.0.1]) by smtp17.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id BFE2425E26; Thu, 3 Jan 2019 16:17:19 -0500 (EST) X-Auth-ID: dev@logicalwebhost.com Received: by smtp17.relay.iad3a.emailsrvr.com (Authenticated sender: dev-AT-logicalwebhost.com) with ESMTPSA id 6558D25E0E; Thu, 3 Jan 2019 16:17:19 -0500 (EST) X-Sender-Id: dev@logicalwebhost.com Received: from [192.168.2.157] (97-90-101-114.static.mdfd.or.charter.com [97.90.101.114]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384) by 0.0.0.0:25 (trex/5.7.12); Thu, 03 Jan 2019 16:17:19 -0500 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) From: Dev In-Reply-To: Date: Thu, 3 Jan 2019 13:17:17 -0800 Cc: bloat Content-Transfer-Encoding: quoted-printable Message-Id: <30445889-0357-4BFE-BF88-2848C7C8A50F@logicalwebhost.com> References: <74C61225-5DA8-46DD-ABB7-D454C7991444@logicalwebhost.com> To: Dave Taht X-Mailer: Apple Mail (2.3445.102.3) 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 21:17:20 -0000 #>: cd /sys/class/net/eth0/queues/tx-0/byte_queue_limits /sys/class/net/eth0/queues/tx-0/byte_queue_limits >: ls hold_time inflight limit limit_max limit_min /sys/class/net/eth0/queues/tx-0/byte_queue_limits >: cat limit 250 - Dev > On Jan 3, 2019, at 9:18 AM, Dave Taht wrote: >=20 > 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. >=20 > On Thu, Jan 3, 2019 at 9:16 AM Dev wrote: >>=20 >> Dev writes: >>=20 >>> 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. >>>=20 >>> I connected machine A and B to a gig switch, then dropped the port >>> speed on machine A like: >>>=20 >>> ethtool -s enp8s0 advertise 0x002 >>=20 >>> =46rom 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... >>=20 >>> -Toke >>=20 >> 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 to follow the howto on the website, but my ping times aren=E2=80=99= t dropping once fq_codel is enabled. >>=20 >> -Dev >> _______________________________________________ >> Bloat mailing list >> Bloat@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/bloat >=20 >=20 >=20 > --=20 >=20 > Dave T=C3=A4ht > CTO, TekLibre, LLC > http://www.teklibre.com > Tel: 1-831-205-9740