Commit 6b015a52 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net_sched: sch_fq: avoid calling ktime_get_ns() if not needed 



There are two cases were we can avoid calling ktime_get_ns() :

1) Queue is empty.
2) Internal queue is not empty.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6133e78f

net/sched/sch_fq.c

+6 −1
Original line number Diff line number Diff line
@@ -414,16 +414,21 @@ static void fq_check_throttled(struct fq_sched_data *q, u64 now) 
static struct sk_buff *fq_dequeue(struct Qdisc *sch)

{

	struct fq_sched_data *q = qdisc_priv(sch);

	u64 now = ktime_get_ns();

	struct fq_flow_head *head;

	struct sk_buff *skb;

	struct fq_flow *f;

	unsigned long rate;

	u32 plen;

	u64 now;



	if (!sch->q.qlen)

		return NULL;



	skb = fq_dequeue_head(sch, &q->internal);

	if (skb)

		goto out;



	now = ktime_get_ns();

	fq_check_throttled(q, now);

begin:

	head = &q->new_flows;