netdev - Re: [PATCH net-next 0/4] net_sched: bulk dequeue and deferred drops

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Message-ID: <20160622164736.0ab98e6b@redhat.com>
Date:	Wed, 22 Jun 2016 16:47:36 +0200
From:	Jesper Dangaard Brouer <brouer@...hat.com>
To:	Eric Dumazet <edumazet@...gle.com>
Cc:	"David S . Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	John Fastabend <john.r.fastabend@...el.com>,
	Eric Dumazet <eric.dumazet@...il.com>, brouer@...hat.com
Subject: Re: [PATCH net-next 0/4] net_sched: bulk dequeue and deferred drops

On Tue, 21 Jun 2016 23:16:48 -0700
Eric Dumazet <edumazet@...gle.com> wrote:

> First patch adds an additional parameter to ->enqueue() qdisc method
> so that drops can be done outside of critical section
> (after locks are released).
> 
> Then fq_codel can have a small optimization to reduce number of cache
> lines misses during a drop event
> (possibly accumulating hundreds of packets to be freed).
> 
> A small htb change exports the backlog in class dumps.
> 
> Final patch adds bulk dequeue to qdiscs that were lacking this feature.
> 
> This series brings a nice qdisc performance increase (more than 80 %
> in some cases).

Thanks for working on this Eric! this is great work! :-)

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  Author of http://www.iptv-analyzer.org
  LinkedIn: http://www.linkedin.com/in/brouer