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From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	lorenzo.bianconi@redhat.com, davem@davemloft.net,
	kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net,
	toke@redhat.com, song@kernel.org, brouer@redhat.com
Subject: Re: [PATCH v4 bpf-next] cpumap: bulk skb using netif_receive_skb_list
Date: Fri, 23 Apr 2021 12:34:55 +0200	[thread overview]
Message-ID: <20210423123455.279dae88@carbon> (raw)
In-Reply-To: <c729f83e5d7482d9329e0f165bdbe5adcefd1510.1619169700.git.lorenzo@kernel.org>

On Fri, 23 Apr 2021 11:27:27 +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. Packets are discarded by the
> UDP layer.
> 
> $xdp_redirect_cpu  --cpu <cpu> --progname xdp_cpu_map0 --dev <eth>
> 
> bpf-next: ~2.35Mpps
> bpf-next + cpumap skb-list: ~2.72Mpps
> 
> Rename drops counter in kmem_alloc_drops since now it reports just
> kmem_cache_alloc_bulk failures
> 
> 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


  reply	other threads:[~2021-04-23 10:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-23  9:27 Lorenzo Bianconi
2021-04-23 10:34 ` Jesper Dangaard Brouer [this message]
2021-04-27 15:20 ` patchwork-bot+netdevbpf

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