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(parent: 4103f8c) | patch
[IPV4]: align inet_protos[] on SMP
authorEric Dumazet <dada1@cosmosbay.com>
Tue, 27 Mar 2007 21:18:34 +0000 (14:18 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Thu, 26 Apr 2007 05:28:20 +0000 (22:28 -0700)
commit03d4f879b9ddf7d5c1f788792247e62450342eed
treeae5598e3309da4a6725f60ce7facf968849a7ab8tree | snapshot (tar.gz zip)
parent4103f8cd5c1f260d674a7b426ed221812de54d47commit | diff
[IPV4]: align inet_protos[] on SMP

As IPPROTO_TCP is 6, it makes sense to make sure inet_protos[] array
is properly cache line aligned to avoid false sharing on SMP.

c0680540 b peer_total
c0680544 b inet_peer_unused_head
c0680560 B inet_protos

On i386 this example, we can see that inet_protos[IPPROTO_TCP] shares
a potentially hot (and modified) cache line.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/protocol.c diff | blob | blame | history