From: Denys Fedoryshchenko <nuclearcat@nuclearcat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Linux Kernel Network Developers <netdev@vger.kernel.org>
Subject: Re: HTB going crazy over ~5Gbit/s (4.12.9, but problem present in older kernels as well)
Date: Wed, 13 Sep 2017 19:27:22 +0300 [thread overview]
Message-ID: <9b8cdc2b39fdd2d0be7b5f559b2034e7@nuclearcat.com> (raw)
In-Reply-To: <1505319370.15310.169.camel@edumazet-glaptop3.roam.corp.google.com>
On 2017-09-13 19:16, Eric Dumazet wrote:
> 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
As soon as disabling it solve my problem - i'm fine, hehe, but i guess
other people who might hit this problem, should be aware how to find
reason.
They should not be disappointed in Linux :)
Because i can't measure this bottleneck before it happens, i'm seeing on
mpstat all cpu's are idle, and same time traffic is throttled.
next prev parent reply other threads:[~2017-09-13 16:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 15:20 HTB going crazy over ~5Gbit/s (4.12.9, but problem present in older kernels as well) Denys Fedoryshchenko
2017-09-13 15:34 ` Denys Fedoryshchenko
2017-09-13 16:16 ` Eric Dumazet
2017-09-13 16:27 ` Denys Fedoryshchenko [this message]
2017-09-13 16:42 ` Eric Dumazet
2017-09-13 16:55 ` Eric Dumazet
2017-09-13 17:12 ` Denys Fedoryshchenko
2017-09-13 17:20 ` Eric Dumazet
2017-09-13 17:35 ` Denys Fedoryshchenko
2017-09-13 17:58 ` Eric Dumazet
2017-09-13 18:03 ` Eric Dumazet
2017-09-13 18:16 ` [PATCH net] net_sched: gen_estimator: fix scaling error in bytes/packets samples Eric Dumazet
2017-09-13 20:34 ` David Miller
2017-09-13 15:51 ` HTB going crazy over ~5Gbit/s (4.12.9, but problem present in older kernels as well) Eric Dumazet
2017-09-13 15:56 ` Denys Fedoryshchenko
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