From: Juliusz Chroboczek <jch@irif.fr>
To: "Toke Høiland-Jørgensen" <toke@toke.dk>
Cc: galene@lists.galene.org, Dave Taht <dave@taht.net>
Subject: [Galene] Re: fq-codel trashing
Date: Tue, 12 Jan 2021 18:38:30 +0100 [thread overview]
Message-ID: <878s8yqcmh.wl-jch@irif.fr> (raw)
In-Reply-To: <87pn2aup3o.fsf@toke.dk>
>> We're having a large meeting on the lab's Galène server, and it looks like
>> fq-codel is trashing: the new_flow_count increases as fast as the packet
>> 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 interface
> 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
Sent 1270306213261 bytes 3032714775 pkt (dropped 2839148, overlimits 0 requeues 10623)
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
next prev parent reply other threads:[~2021-01-12 17:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 13:46 [Galene] " Juliusz Chroboczek
2021-01-12 15:55 ` [Galene] " Toke Høiland-Jørgensen
2021-01-12 16:01 ` Dave Taht
2021-01-12 17:38 ` Juliusz Chroboczek [this message]
2021-01-12 17:42 ` Dave Taht
2021-01-12 18:10 ` Juliusz Chroboczek
2021-01-12 19:05 ` Dave Taht
2021-01-12 19:52 ` Michael Ströder
2021-01-12 21:02 ` Juliusz Chroboczek
2021-01-12 19:29 ` Michael Ströder
2021-01-12 21:22 ` Juliusz Chroboczek
2021-01-13 19:09 ` Michael Ströder
2021-01-14 12:59 ` Juliusz Chroboczek
2021-01-14 13:03 ` Michael Ströder
2021-01-14 13:10 ` Juliusz Chroboczek
2021-01-14 13:23 ` Michael Ströder
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