netdev - [PATCH bpf-next 0/2] xsk: XSKMAP lookup improvements

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Date:   Thu, 24 Oct 2019 09:19:29 +0200
From:   Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To:     bpf@...r.kernel.org, netdev@...r.kernel.org, ast@...com,
        daniel@...earbox.net
Cc:     magnus.karlsson@...el.com, bjorn.topel@...el.com,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Subject: [PATCH bpf-next 0/2] xsk: XSKMAP lookup improvements

Hi,

This small set consists of two patches from Bjorn and myself which are
optimizing the XSKMAP lookups.  In first patch, Bjorn converts the array
of pointers to struct xdp_sock to the flexible array member of XSKMAP
itself. Second patch, based on Bjorn's work, implements the
map_gen_lookup() for XSKMAP.

Based on the XDP program from tools/lib/bpf/xsk.c where
bpf_map_lookup_elem() is explicitly called, this work yields the 5%
improvement for xdpsock's rxdrop scenario.

Thanks!

Björn Töpel (1):
  xsk: store struct xdp_sock as a flexible array member of the XSKMAP

Maciej Fijalkowski (1):
  xsk: implement map_gen_lookup() callback for XSKMAP

 kernel/bpf/xskmap.c | 74 +++++++++++++++++++++++++--------------------
 1 file changed, 42 insertions(+), 32 deletions(-)

-- 
2.20.1