From: Pete Heist <pete@heistp.net>
To: Georgios Amanakis <gamanakis@gmail.com>
Cc: "Toke Høiland-Jørgensen" <toke@toke.dk>,
"Cake List" <cake@lists.bufferbloat.net>
Subject: Re: [Cake] dual-src/dsthost unfairness, only with bi-directional traffic
Date: Fri, 4 Jan 2019 09:09:50 +0100 [thread overview]
Message-ID: <7DC629FF-C4BC-442F-992B-B3C0D5C95AB3@heistp.net> (raw)
In-Reply-To: <b293747218566f99a39412f40968105b446dc49d.camel@gmail.com>
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> On Jan 4, 2019, at 3:08 AM, Georgios Amanakis <gamanakis@gmail.com> wrote:
>
> On Thu, 2019-01-03 at 23:06 +0100, Pete Heist wrote:
>> Both have cake at 100mbit only on egress, with dual-srchost on client
>> and dual-dsthost on server. With this setup (and probably previous
>> ones, I just didn’t test it this way), bi-directional fairness with
>> these flow counts works:
>>
>> IP1 8-flow TCP up: 46.4
>> IP2 1-flow TCP up: 47.3
>> IP1 8-flow TCP down: 46.8
>> IP2 1-flow TCP down: 46.7
>>
>> but with the original flow counts reported it’s still similarly
>> imbalanced as before:
>>
>> IP1 8-flow TCP up: 82.9
>> IP2 1-flow TCP up: 10.9
>> IP1 1-flow TCP down: 10.8
>> IP2 8-flow TCP down: 83.3
>
> I just tested on archlinux, latest 4.20 on the router, iproute2 4.19.0,
> using flent 1.2.2/netserver in a setup similar to Pete's:
>
> client 1,2 <----> router <----> server
>
> The results are the same with Pete's.
One more scenario to add, IP1: 1 up / 1 down, IP2: 1 up / 8 down. In the graph, IP1 = host1, IP2 = host2, sorry for the longer labels, and watch out that the position of the hosts changes.
dual keywords: https://www.heistp.net/downloads/fairness_1_1_1_8/bar_combine_fairness_1_1_1_8.svg <https://www.heistp.net/downloads/fairness_1_1_1_8/bar_combine_fairness_1_1_1_8.svg>
host keywords: https://www.heistp.net/downloads/fairness_1_1_1_8_host/bar_combine_fairness_1_1_1_8_host.svg <https://www.heistp.net/downloads/fairness_1_1_1_8_host/bar_combine_fairness_1_1_1_8_host.svg>
Also not what I’d expect, but host 2’s upload does get slowed down, even disproportionately, in response to the extra aggregate download he gets. Up and down are more balanced with the “host” keywords, but without flow fairness there’s higher inter-flow latency.
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next prev parent reply other threads:[~2019-01-04 8:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-01 23:04 Pete Heist
2019-01-03 3:57 ` Georgios Amanakis
2019-01-03 4:15 ` Georgios Amanakis
2019-01-03 5:18 ` Jonathan Morton
2019-01-03 10:46 ` Pete Heist
2019-01-03 11:03 ` Toke Høiland-Jørgensen
2019-01-03 13:02 ` Pete Heist
2019-01-03 13:20 ` Toke Høiland-Jørgensen
2019-01-03 16:35 ` Pete Heist
2019-01-03 18:24 ` Georgios Amanakis
2019-01-03 22:06 ` Pete Heist
2019-01-04 2:08 ` Georgios Amanakis
2019-01-04 8:09 ` Pete Heist [this message]
2019-01-04 7:37 ` Pete Heist
2019-01-04 11:34 ` Pete Heist
2019-01-15 19:22 ` George Amanakis
2019-01-15 22:42 ` Georgios Amanakis
2019-01-16 3:34 ` George Amanakis
2019-01-16 3:47 ` gamanakis
2019-01-16 7:58 ` Pete Heist
2019-01-26 7:35 ` Pete Heist
2019-01-28 1:34 ` Georgios Amanakis
2019-01-18 10:06 ` Toke Høiland-Jørgensen
2019-01-18 12:07 ` Georgios Amanakis
2019-01-18 13:33 ` Toke Høiland-Jørgensen
2019-01-18 13:40 ` Sebastian Moeller
2019-01-18 14:30 ` Toke Høiland-Jørgensen
2019-01-18 13:45 ` Jonathan Morton
2019-01-18 14:32 ` Toke Høiland-Jørgensen
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