[RFC PATCH v2 09/10] net: sched: helper to sum qlen
From: John Fastabend <john.fastabend@gmail.com>
Date: 2016-07-14 06:23:54
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Reporting qlen when qlen is per cpu requires aggregating the per cpu counters. This adds a helper routine for this. Signed-off-by: John Fastabend <redacted> --- include/net/sch_generic.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 149f079..d370fee 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h@@ -271,6 +271,21 @@ static inline int qdisc_qlen(const struct Qdisc *q) return q->q.qlen; } +static inline int qdisc_qlen_sum(const struct Qdisc *q) +{ + __u32 qlen = 0; + int i; + + if (q->flags & TCQ_F_NOLOCK) { + for_each_possible_cpu(i) + qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; + } else { + qlen = q->q.qlen; + } + + return qlen; +} + static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) { return (struct qdisc_skb_cb *)skb->cb;