netdev - Re: Kernel 4.19 network performance - forwarding/routing normal users traffic

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Date:   Sat, 10 Nov 2018 14:18:27 +0100
From:   Paweł Staszewski <pstaszewski@...are.pl>
To:     David Ahern <dsahern@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>, Yoel Caspersen <yoel@...knet.dk>
Subject: Re: Kernel 4.19 network performance - forwarding/routing normal users
 traffic



W dniu 10.11.2018 o 01:06, David Ahern pisze:
> On 11/9/18 9:21 AM, David Ahern wrote:
>>> Is there possible to add only counters from xdp for vlans ?
>>> This will help me in testing.
>> I will take a look today at adding counters that you can dump using
>> bpftool. It will be a temporary solution for this xdp program only.
>>
> Same tree, kernel-tables-wip-02 branch. Compile kernel and install.
> Compile samples as before.
>
> If you give the userspace program a -t arg, it loop showing stats.
> Ctrl-C to break. The xdp programs are not detached on exit.
>
> Example:
>
> ./xdp_fwd -t 5 eth1 eth2 eth3 eth4
>
> 15:59:32:       rx         tx  dropped  skipped    l3_dev    fib_dev
> index  3:   901158     901158        0       18         0          0
> index  4:   901159     901158        0       20         0     901139
> index 10:        0          0        0        0        19         19
> index 11:        0          0        0        0    901139     901139
> index 15:        0          0        0        0        19         19
> index 16:        0          0        0        0    901139          0
>
> Rx and Tx counters are for the physical port.
>
> VLANs show up as l3_dev (ingress) and fib_dev (egress).
>
> dropped is anytime the xdp program returns XDP_DROP (e.g., invalid packet)
>
> skipped is anytime the program returns XDP_PASS (e.g., not ipv4 or ipv6,
> local traffic, or needs full stack assist).
>
recompiled new version but:

./xdp_fwd enp175s0f0 enp175s0f1
libbpf: failed to create map (name: 'stats_map'): Operation not permitted
libbpf: failed to load object './xdp_fwd_kern.o'