netdev - Re: HTB going crazy over ~5Gbit/s (4.12.9, but problem present in older kernels as well)

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Message-ID: <1505319370.15310.169.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 13 Sep 2017 09:16:10 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: HTB going crazy over ~5Gbit/s (4.12.9, but problem present in
 older kernels as well)

On Wed, 2017-09-13 at 18:34 +0300, Denys Fedoryshchenko wrote:
> Well, probably i am answering my own question, removing estimator from 
> classes seems drastically improve situation.
> It seems estimator has some issues that cause shaper to behave 
> incorrectly (throttling traffic while it should not).
> But i guess thats a bug?
> As i was not able to predict such bottleneck by CPU load measurements.

Well, there was a reason we disabled HTB class estimators by default ;)


https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=64153ce0a7b61b2a5cacb01805cbf670142339e9