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| author | Eric Dumazet <edumazet@google.com> | 2014-11-02 06:00:12 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-03 12:25:08 -0500 |
| commit | 4cdb1e2e3d3495423db558d3bb7ed11d66aabce7 (patch) | |
| tree | 8ac47c7323c806a287b6f63277d6576040e4a1dc | |
| parent | 55b42b5ca2dcf143465968697fe6c6503b05fca1 (diff) | |
| download | linux-exynos-4cdb1e2e3d3495423db558d3bb7ed11d66aabce7.tar.gz linux-exynos-4cdb1e2e3d3495423db558d3bb7ed11d66aabce7.tar.bz2 linux-exynos-4cdb1e2e3d3495423db558d3bb7ed11d66aabce7.zip | |
net: shrink struct softnet_data
flow_limit in struct softnet_data is only read from local cpu
and can be moved to fill a hole, reducing softnet_data size by
64 bytes on x86_64
While we are at it, move output_queue, output_queue_tailp and
completion_queue, so that rx / tx paths touch a single cache line.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/netdevice.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c85e06512246..5ed05bd764dc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2329,10 +2329,7 @@ extern int netdev_flow_limit_table_len; * Incoming packets are placed on per-cpu queues */ struct softnet_data { - struct Qdisc *output_queue; - struct Qdisc **output_queue_tailp; struct list_head poll_list; - struct sk_buff *completion_queue; struct sk_buff_head process_queue; /* stats */ @@ -2340,10 +2337,17 @@ struct softnet_data { unsigned int time_squeeze; unsigned int cpu_collision; unsigned int received_rps; - #ifdef CONFIG_RPS struct softnet_data *rps_ipi_list; +#endif +#ifdef CONFIG_NET_FLOW_LIMIT + struct sd_flow_limit __rcu *flow_limit; +#endif + struct Qdisc *output_queue; + struct Qdisc **output_queue_tailp; + struct sk_buff *completion_queue; +#ifdef CONFIG_RPS /* Elements below can be accessed between CPUs for RPS */ struct call_single_data csd ____cacheline_aligned_in_smp; struct softnet_data *rps_ipi_next; @@ -2355,9 +2359,6 @@ struct softnet_data { struct sk_buff_head input_pkt_queue; struct napi_struct backlog; -#ifdef CONFIG_NET_FLOW_LIMIT - struct sd_flow_limit __rcu *flow_limit; -#endif }; static inline void input_queue_head_incr(struct softnet_data *sd) |