netdev - Re: [PATCH net-next v4] xen networking: add basic XDP support for xen-netfront

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Date:   Wed, 18 Mar 2020 15:30:12 +0300
From:   Denis Kirjanov <kda@...ux-powerpc.org>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     netdev@...r.kernel.org, jgross@...e.com,
        ilias.apalodimas@...aro.org, wei.liu@...nel.org, paul@....org
Subject: Re: [PATCH net-next v4] xen networking: add basic XDP support for xen-netfront

On 3/16/20, Jesper Dangaard Brouer <brouer@...hat.com> wrote:
> On Mon, 16 Mar 2020 16:09:36 +0300
> Denis Kirjanov <kda@...ux-powerpc.org> wrote:
>
>> v3:
>> - added XDP_TX support (tested with xdping echoserver)
>> - added XDP_REDIRECT support (tested with modified xdp_redirect_kern)
>
> Please test XDP_REDIRECT with xdp_redirect_cpu from samples/bpf/.

./xdp_redirect_cpu --dev eth0 --prog xdp_cpu_map0 --cpu 1

Running XDP/eBPF prog_name:xdp_cpu_map0
XDP-cpumap      CPU:to  pps            drop-pps    extra-info
XDP-RX          0       5,964          0           0
XDP-RX          total   5,964          0
cpumap-enqueue    0:1   5,964          0           1.00       bulk-average
cpumap-enqueue  sum:1   5,964          0           1.00       bulk-average
cpumap_kthread  1       5,963          0           5,939      sched
cpumap_kthread  total   5,963          0           5,939      sched-sum
redirect_err    total   0              0
xdp_exception   total   0              0

I can see increase in RES:
RES:     129814     484285     198201     359270   Rescheduling interrupts


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