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Commit 3c75f6ee authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net_sched: sch_htb: add per class overlimits counter 



HTB qdisc overlimits counter is properly increased, but we have no per
class counter, meaning it is difficult to diagnose HTB problems.

This patch adds this counter, visible in "tc -s class show dev eth0",
with current iproute2.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarDenys Fedoryshchenko <nuclearcat@nuclearcat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7e5dd53f

net/sched/sch_htb.c

+5 −0
Original line number Diff line number Diff line
@@ -142,6 +142,7 @@ struct htb_class { 
	struct rb_node		node[TC_HTB_NUMPRIO];	/* node for self or feed tree */



	unsigned int drops ____cacheline_aligned_in_smp;

	unsigned int		overlimits;

};



struct htb_level {
@@ -533,6 +534,9 @@ htb_change_class_mode(struct htb_sched *q, struct htb_class *cl, s64 *diff) 
	if (new_mode == cl->cmode)

		return;



	if (new_mode == HTB_CANT_SEND)

		cl->overlimits++;



	if (cl->prio_activity) {	/* not necessary: speed optimization */

		if (cl->cmode != HTB_CANT_SEND)

			htb_deactivate_prios(q, cl);
@@ -1143,6 +1147,7 @@ htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d) 
	struct htb_class *cl = (struct htb_class *)arg;

	struct gnet_stats_queue qs = {

		.drops = cl->drops,

		.overlimits = cl->overlimits,

	};

	__u32 qlen = 0;