bridge: per-cpu packet statistics (v3)

The shared packet statistics are a potential source of slow down
on bridged traffic. Convert to per-cpu array, but only keep those
statistics which change per-packet.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 846d7d1e2075..791d4ab0fd4d 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -135,6 +135,14 @@ struct net_bridge
         spinlock_t                      lock;
         struct list_head                port_list;
         struct net_device               *dev;
+
+        struct br_cpu_netstats __percpu {
+                unsigned long   rx_packets;
+                unsigned long   rx_bytes;
+                unsigned long   tx_packets;
+                unsigned long   tx_bytes;
+        } *stats;
+
         spinlock_t                      hash_lock;
         struct hlist_head               hash[BR_HASH_SIZE];
         unsigned long                   feature_mask;