netdev - Re: [net-next PATCH] e1000: add initial XDP support

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Date:   Mon, 29 Aug 2016 10:30:47 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     brouer@...hat.com, John Fastabend <john.fastabend@...il.com>,
        bblanco@...mgrid.com, davem@...emloft.net,
        alexei.starovoitov@...il.com, john.r.fastabend@...el.com,
        netdev@...r.kernel.org, xiyou.wangcong@...il.com
Subject: Re: [net-next PATCH] e1000: add initial XDP support

On Sun, 28 Aug 2016 08:23:26 -0400
Jamal Hadi Salim <jhs@...atatu.com> wrote:

> On 16-08-27 03:11 AM, John Fastabend wrote:
> > From: Alexei Starovoitov <ast@...com>
> >
> > This patch adds initial support for XDP on e1000 driver. Note e1000
> > driver does not support page recycling in general which could be
> > added as a further improvement. However for XDP_DROP and XDP_XMIT
> > the xdp code paths will recycle pages.
> >
> > This patch includes the rcu_read_lock/rcu_read_unlock pair noted by
> > Brenden Blanco in another pending patch.
> >
> >   net/mlx4_en: protect ring->xdp_prog with rcu_read_lock  
> 
> Do you have any perf numbers of drops of this vs tc drop at ingress?

Hi Jamal,

Can you please provide a simple "tc" command that implements "tc drop"?

Then, I'll add this to the series of tests I'm using for (what I call)
"zoom-in" benchmarking.

-- 
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