netdev - [PATCH bpf-next 0/3] veth: add skb bulking allocation for XDP

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Date:   Tue, 26 Jan 2021 19:41:58 +0100
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        ast@...nel.org, daniel@...earbox.net, toshiaki.makita1@...il.com,
        lorenzo.bianconi@...hat.com, brouer@...hat.com, toke@...hat.com
Subject: [PATCH bpf-next 0/3] veth: add skb bulking allocation for XDP_PASS

Introduce bulking skb allocation for XDP_PASS verdict in veth driver.
The proposed approach has been tested in the following scenario:

eth (ixgbe) --> XDP_REDIRECT --> veth0 --> (remote-ns) veth1 --> XDP_PASS

XDP_REDIRECT: xdp_redirect_map bpf sample
XDP_PASS: xdp_rxq_info bpf sample

traffic generator: pkt_gen sending udp traffic on a remote device

bpf-next master: ~3.64Mpps
bpf-next + skb bulking allocation: ~3.75Mpps

Lorenzo Bianconi (3):
  net: veth: introduce bulking for XDP_PASS
  net: xdp: move XDP_BATCH_SIZE in common header
  net: veth: alloc skb in bulk for ndo_xdp_xmit

 drivers/net/veth.c  | 101 ++++++++++++++++++++++++++++++++------------
 include/net/xdp.h   |   2 +
 kernel/bpf/cpumap.c |  13 +++---
 net/core/xdp.c      |  11 +++++
 4 files changed, 92 insertions(+), 35 deletions(-)

-- 
2.29.2