From 45203a3b380cee28f570475c0d28c169f908c209 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 6 Jun 2013 08:43:22 -0700 Subject: net_sched: add 64bit rate estimators struct gnet_stats_rate_est contains u32 fields, so the bytes per second field can wrap at 34360Mbit. Add a new gnet_stats_rate_est64 structure to get 64bit bps/pps fields, and switch the kernel to use this structure natively. This structure is dumped to user space as a new attribute : TCA_STATS_RATE_EST64 Old tc command will now display the capped bps (to 34360Mbit), instead of wrapped values, and updated tc command will display correct information. Old tc command output, after patch : eric:~# tc -s -d qd sh dev lo qdisc pfifo 8001: root refcnt 2 limit 1000p Sent 80868245400 bytes 1978837 pkt (dropped 0, overlimits 0 requeues 0) rate 34360Mbit 189696pps backlog 0b 0p requeues 0 This patch carefully reorganizes "struct Qdisc" layout to get optimal performance on SMP. Signed-off-by: Eric Dumazet Cc: Ben Hutchings Signed-off-by: David S. Miller --- include/uapi/linux/gen_stats.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/uapi/linux/gen_stats.h') diff --git a/include/uapi/linux/gen_stats.h b/include/uapi/linux/gen_stats.h index 552c8a0a12d1..6487317ea619 100644 --- a/include/uapi/linux/gen_stats.h +++ b/include/uapi/linux/gen_stats.h @@ -9,6 +9,7 @@ enum { TCA_STATS_RATE_EST, TCA_STATS_QUEUE, TCA_STATS_APP, + TCA_STATS_RATE_EST64, __TCA_STATS_MAX, }; #define TCA_STATS_MAX (__TCA_STATS_MAX - 1) @@ -37,6 +38,16 @@ struct gnet_stats_rate_est { __u32 pps; }; +/** + * struct gnet_stats_rate_est64 - rate estimator + * @bps: current byte rate + * @pps: current packet rate + */ +struct gnet_stats_rate_est64 { + __u64 bps; + __u64 pps; +}; + /** * struct gnet_stats_queue - queuing statistics * @qlen: queue length -- cgit v1.2.3