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authorEric Dumazet <dada1@cosmosbay.com>2008-11-25 21:16:35 -0800
committerDavid S. Miller <davem@davemloft.net>2008-11-25 21:16:35 -0800
commit1748376b6626acf59c24e9592ac67b3fe2a0e026 (patch)
tree65a28205daf1ca92e31389440764fc407365014e /net/ipv4/proc.c
parentc1b56878fb68e9c14070939ea4537ad4db79ffae (diff)
downloadop-kernel-dev-1748376b6626acf59c24e9592ac67b3fe2a0e026.zip
op-kernel-dev-1748376b6626acf59c24e9592ac67b3fe2a0e026.tar.gz
net: Use a percpu_counter for sockets_allocated
Instead of using one atomic_t per protocol, use a percpu_counter for "sockets_allocated", to reduce cache line contention on heavy duty network servers. Note : We revert commit (248969ae31e1b3276fc4399d67ce29a5d81e6fd9 net: af_unix can make unix_nr_socks visbile in /proc), since it is not anymore used after sock_prot_inuse_add() addition Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/proc.c')
-rw-r--r--net/ipv4/proc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 731789b..4944b47 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -55,7 +55,8 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
sock_prot_inuse_get(net, &tcp_prot),
atomic_read(&tcp_orphan_count),
- tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
+ tcp_death_row.tw_count,
+ (int)percpu_counter_sum_positive(&tcp_sockets_allocated),
atomic_read(&tcp_memory_allocated));
seq_printf(seq, "UDP: inuse %d mem %d\n",
sock_prot_inuse_get(net, &udp_prot),
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