From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: mail.toke.dk; spf=pass (mailfrom) smtp.mailfrom=irif.fr (client-ip=2001:660:3301:8000::1:2; helo=korolev.univ-paris7.fr; envelope-from=jch@irif.fr; receiver=) Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) by mail.toke.dk (Postfix) with ESMTPS id 2BA7F7CA179 for ; Tue, 12 Jan 2021 18:38:34 +0100 (CET) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/82085) with ESMTP id 10CHcVji014478 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 12 Jan 2021 18:38:31 +0100 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/82085) with ESMTP id 10CHcVib003192; Tue, 12 Jan 2021 18:38:31 +0100 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id AD59B21DB1; Tue, 12 Jan 2021 18:38:31 +0100 (CET) X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id cfjJP_6xNgNj; Tue, 12 Jan 2021 18:38:30 +0100 (CET) Received: from pirx.irif.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 16D0021DAD; Tue, 12 Jan 2021 18:38:30 +0100 (CET) Date: Tue, 12 Jan 2021 18:38:30 +0100 Message-ID: <878s8yqcmh.wl-jch@irif.fr> From: Juliusz Chroboczek To: Toke =?ISO-8859-1?Q?H=F8iland-J=F8rgensen?= In-Reply-To: <87pn2aup3o.fsf@toke.dk> References: <87k0siqndj.wl-jch@irif.fr> <87pn2aup3o.fsf@toke.dk> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.1 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=ISO-8859-1 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Tue, 12 Jan 2021 18:38:31 +0100 (CET) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Tue, 12 Jan 2021 18:38:31 +0100 (CET) X-Miltered: at korolev with ID 5FFDDE97.007 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 5FFDDE97.001 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 5FFDDE97.007 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 5FFDDE97.001 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 5FFDDE97.007 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 5FFDDE97.001 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Content-Transfer-Encoding: quoted-printable Message-ID-Hash: F4HTPNXFD7BH4HJSLWAFTDXDYUO2UJRL X-Message-ID-Hash: F4HTPNXFD7BH4HJSLWAFTDXDYUO2UJRL X-MailFrom: jch@irif.fr X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: galene@lists.galene.org, Dave Taht X-Mailman-Version: 3.3.2 Precedence: list Subject: [Galene] Re: fq-codel trashing List-Id: =?utf-8?q?Gal=C3=A8ne_videoconferencing_server_discussion_list?= Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: >> We're having a large meeting on the lab's Gal=E8ne server, and it look= s like >> fq-codel is trashing: the new_flow_count increases as fast as the pack= et >> counter. > That just sounds like wherever you're running FQ-CoDel is not actually > the bottleneck? Right. > But it only happens if you're also running a shaper (such as HTB or TBF= ) > on the interface, since if FQ-CoDel is installed on a physical interfac= e > it will set the TCQ_F_CAN_BYPASS flag, which means that when the queue > is completely empty it will be bypassed entirely... I'm not running a shaper. The interface is reported as 00:03.0 Ethernet controller: Red Hat, Inc Virtio network device Ethtool doesn't give anything interesting. Here's the output of tc -s qdisc show: qdisc fq_codel 0: root refcnt 2 limit 10240p flows 1024 quantum 1514 = target 5.0ms interval 100.0ms memory_limit 32Mb ecn=20 Sent 1270306213261 bytes 3032714775 pkt (dropped 2839148, overlimits= 0 requeues 10623)=20 backlog 0b 0p requeues 10623 maxpacket 68130 drop_overlimit 1576971 new_flow_count 732081615 ecn= _mark 22 new_flows_len 0 old_flows_len 0