netdev - Re: [PATCH bpf-next 3/4] samples/bpf: xdpsock: add period cycle time to Tx operation

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Date:   Fri, 26 Nov 2021 22:52:33 -0800
From:   Song Liu <song@...nel.org>
To:     Ong Boon Leong <boon.leong.ong@...el.com>
Cc:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        bjorn@...nel.org, Magnus Karlsson <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>
Subject: Re: [PATCH bpf-next 3/4] samples/bpf: xdpsock: add period cycle time
 to Tx operation

On Wed, Nov 24, 2021 at 1:22 AM Ong Boon Leong <boon.leong.ong@...el.com> wrote:
>
> Tx cycle time is in micro-seconds unit. By combining the batch size (-b M)
> and Tx cycle time (-T|--tx-cycle N), xdpsock now can transmit batch-size of
> packets every N-us periodically.
>
> For example to transmit 1 packet each 1ms cycle time for total of 2000000
> packets:
>
>  $ xdpsock -i eth0 -T -N -z -T 1000 -b 1 -C 2000000
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           1.00
> rx                 0              0
> tx                 1000           1996872
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           1.00
> rx                 0              0
> tx                 1000           1997872
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           1.00
> rx                 0              0
> tx                 1000           1998872
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           1.00
> rx                 0              0
> tx                 1000           1999872
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           1.00
> rx                 0              0
> tx                 128            2000000
>
>  sock0@...0s29f1:2 txonly xdp-drv
>                    pps            pkts           0.00
> rx                 0              0
> tx                 0              2000000
>
> Signed-off-by: Ong Boon Leong <boon.leong.ong@...el.com>

Acked-by: Song Liu <songliubraving@...com>