Re: [PATCH v2 bpf-next] cpumap: bulk skb using netif_receive_skb_list

Jesper Dangaard Brouer
2021-04-13T17:57:50Z

On Tue, 13 Apr 2021 18:22:02 +0200
Lorenzo Bianconi <lorenzo@kernel.org> wrote:

> Rely on netif_receive_skb_list routine to send skbs converted from
> xdp_frames in cpu_map_kthread_run in order to improve i-cache usage.
> The proposed patch has been tested running xdp_redirect_cpu bpf sample
> available in the kernel tree that is used to redirect UDP frames from
> ixgbe driver to a cpumap entry and then to the networking stack.
> UDP frames are generated using pkt_gen.
>
> $xdp_redirect_cpu --cpu <cpu> --progname xdp_cpu_map0 --dev <eth>
>
> bpf-next: ~2.2Mpps
> bpf-next + cpumap skb-list: ~3.15Mpps
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>

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

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