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(parent: 5e1abdc) | patch
ipv6: gro: do not use slow memcmp() in ipv6_gro_receive()
authorEric Dumazet <edumazet@google.com>
Tue, 6 Nov 2018 22:25:52 +0000 (14:25 -0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 6 Nov 2018 22:59:27 +0000 (14:59 -0800)
commit0b215b9798640a542c526e3ae69dee83861a4aee
tree8fd33e25e96051f31213de5f5f02ec2f03417a93tree | snapshot
parent5e1abdc3fe56939d9ac34209706b1a527b77b61bcommit | diff
ipv6: gro: do not use slow memcmp() in ipv6_gro_receive()

ipv6_gro_receive() compares 34 bytes using slow memcmp(),
while handcoding with a couple of ipv6_addr_equal() is much faster.

Before this patch, "perf top -e cycles:pp -C <cpu>" would
see memcmp() using ~10% of cpu cycles on a 40Gbit NIC
receiving IPv6 TCP traffic.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ip6_offload.c diff | blob | history
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