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: <33c45cf6c5a52498f45132d29d86bc3d@nuclearcat.com>
Date:   Wed, 13 Sep 2017 18:56:52 +0300
From:   Denys Fedoryshchenko <nuclearcat@...learcat.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        netdev-owner@...r.kernel.org
Subject: Re: HTB going crazy over ~5Gbit/s (4.12.9, but problem present in
 older kernels as well)

On 2017-09-13 18:51, Eric Dumazet wrote:
> On Wed, 2017-09-13 at 18:20 +0300, Denys Fedoryshchenko wrote:
>> Hi,
>> 
>> I noticed after increasing bandwidth over some amount HTB started to
>> throttle classes it should not throttle.
>> Also estimated rate in htb totally wrong, while byte counters is
>> correct.
>> 
>> Is there any overflow or something?
> 
> Thanks Denys for the report, I will take a look at this, since I
> probably introduced some regression.
It's definitely not something recent, this system was on older kernel 
with uptime over 200 days, and this bottleneck was present, i noticed it 
long time before.
But never tried to remove estimators (increasing burst/cburst to insane 
values saved me for a while).