netdev - Re: [net-next, PATCH 3/3, v2] net: netsec: add XDP support

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Date:   Sat, 29 Jun 2019 12:36:30 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc:     netdev@...r.kernel.org, jaswinder.singh@...aro.org,
        ard.biesheuvel@...aro.org, bjorn.topel@...el.com,
        magnus.karlsson@...el.com, daniel@...earbox.net, ast@...nel.org,
        makita.toshiaki@....ntt.co.jp, jakub.kicinski@...ronome.com,
        john.fastabend@...il.com, davem@...emloft.net,
        maciejromanfijalkowski@...il.com, brouer@...hat.com
Subject: Re: [net-next, PATCH 3/3, v2] net: netsec: add XDP support

On Sat, 29 Jun 2019 08:23:25 +0300
Ilias Apalodimas <ilias.apalodimas@...aro.org> wrote:

> The interface only supports 1 Tx queue so locking is introduced on
> the Tx queue if XDP is enabled to make sure .ndo_start_xmit and
> .ndo_xdp_xmit won't corrupt Tx ring
> 
> - Performance (SMMU off)
> 
> Benchmark   XDP_SKB     XDP_DRV
> xdp1        291kpps     344kpps
> rxdrop      282kpps     342kpps
> 
> - Performance (SMMU on)
> Benchmark   XDP_SKB     XDP_DRV
> xdp1        167kpps     324kpps
> rxdrop      164kpps     323kpps
> 
> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>

This version looks okay to me.  I don't have the hardware, so I've not
tested it...

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>

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