From: Pete Heist <pete@heistp.net>
To: Cake List <cake@lists.bufferbloat.net>
Subject: Re: [Cake] cake srchost/dsthost stopped working?
Date: Tue, 03 Aug 2021 21:46:35 +0200 [thread overview]
Message-ID: <3ebc0a3ccdcfa67a48c5ad764ce3389782633fef.camel@heistp.net> (raw)
In-Reply-To: <ae9f4679222f4eb3daa0e092446cb56da2fb85f6.camel@heistp.net>
One more tip, reverting this commit seems to fix it:
https://github.com/torvalds/linux/commit/b0c19ed6088ab41dd2a727b60594b7297c15d6ce
Pete
On Tue, 2021-08-03 at 18:03 +0200, Pete Heist wrote:
> It seems like Cake's srchost and dsthost keywords may have stopped
> working some time between kernel 5.4 and 5.10.
>
> When the bug occurs, there seems to not be fairness between hosts, but
> rather fairness between flows. It reproduces on any 5.10 series kernel
> I've tried, and does not reproduce on any 5.4 series or lower. Here's a
> standalone script to reproduce it with netns, and some sample output:
>
> https://www.heistp.net/downloads/cake-hostfair/
>
> It creates competition from one IP to two IPs, and from two IPs to one
> IP, using the src/dsthost keywords as appropriate. It also tests
> fq_codel with a tc-flow filter, and cake *dual*-(src|dst)host, which
> are both unaffected by this.
>
> Any ideas?
>
> Pete
>
>
next prev parent reply other threads:[~2021-08-03 19:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-03 16:03 Pete Heist
2021-08-03 19:46 ` Pete Heist [this message]
2021-08-04 11:14 ` Toke Høiland-Jørgensen
2021-08-04 11:36 ` Jonathan Morton
2021-08-04 19:29 ` Toke Høiland-Jørgensen
2021-08-04 20:49 ` Pete Heist
2021-08-04 22:52 ` Pete Heist
2021-08-04 23:26 ` Jonathan Morton
2021-08-05 8:55 ` Pete Heist
2021-08-05 14:56 ` Toke Høiland-Jørgensen
2021-08-06 10:08 ` Pete Heist
2021-08-11 3:57 ` Stephen Hemminger
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