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 <edumazet@google.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 1bc210f..71a5688 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -130,7 +130,7 @@
psched_time_t penalized;
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
+ struct gnet_stats_rate_est64 rate_est;
struct tc_cbq_xstats xstats;
struct tcf_proto *filter_list;
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index 759b308..8302717 100644
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -25,7 +25,7 @@
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
+ struct gnet_stats_rate_est64 rate_est;
struct list_head alist;
struct Qdisc *qdisc;
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 9facea0..c407561 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -114,7 +114,7 @@
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
+ struct gnet_stats_rate_est64 rate_est;
unsigned int level; /* class level in hierarchy */
struct tcf_proto *filter_list; /* filter list */
unsigned int filter_cnt; /* filter count */
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index adaedd7..162fb80 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -78,7 +78,7 @@
/* general class parameters */
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
+ struct gnet_stats_rate_est64 rate_est;
struct tc_htb_xstats xstats; /* our special stats */
int refcnt; /* usage count of this class */
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index d51852b..7c195d9 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -138,7 +138,7 @@
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
+ struct gnet_stats_rate_est64 rate_est;
struct Qdisc *qdisc;
struct list_head alist; /* Link for active-classes list. */
struct qfq_aggregate *agg; /* Parent aggregate. */