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

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Message-ID: <b6cfb3c5-9c68-3ea7-48dd-7fbf666db751@mojatatu.com>
Date:   Sun, 28 Aug 2016 08:23:26 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     John Fastabend <john.fastabend@...il.com>, bblanco@...mgrid.com,
        davem@...emloft.net, alexei.starovoitov@...il.com
Cc:     john.r.fastabend@...el.com, netdev@...r.kernel.org,
        xiyou.wangcong@...il.com
Subject: Re: [net-next PATCH] e1000: add initial XDP support

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?
single or multiple cpus.

cheers,
jamal