netdev - Re: Performance comparision / qdisc / no qdisc / queueing linux kernel 4.12

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Date:   Fri, 11 Aug 2017 16:16:06 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Paweł Staszewski <pstaszewski@...are.pl>
Cc:     netdev@...r.kernel.org
Subject: Re: Performance comparision / qdisc / no qdisc / queueing linux
 kernel 4.12

Any of the current qdisc that do rate control are single threaded.
Since bandwidth is a shared resource, the qdisc has to acquire a lock
and update cache shared data structures.

Don't expect HTB or HFSC to be free.

> 
> 4.13-rc3 have kernel panic when deleting qdisc - will try to get panic trace

Please do.