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authorEric Dumazet <eric.dumazet@gmail.com>2011-01-20 08:27:16 +0300
committerDavid S. Miller <davem@davemloft.net>2011-01-21 03:59:32 +0300
commitfd245a4adb5288eac37250875f237c40a20a1944 (patch)
tree1c16670c53dab9d9d05b26a7e7ae8a6a8267e847 /net/sched
parent817fb15dfd988d8dda916ee04fa506f0c466b9d6 (diff)
downloadlinux-fd245a4adb5288eac37250875f237c40a20a1944.tar.xz
net_sched: move TCQ_F_THROTTLED flag
In commit 371121057607e (net: QDISC_STATE_RUNNING dont need atomic bit ops) I moved QDISC_STATE_RUNNING flag to __state container, located in the cache line containing qdisc lock and often dirtied fields. I now move TCQ_F_THROTTLED bit too, so that we let first cache line read mostly, and shared by all cpus. This should speedup HTB/CBQ for example. Not using test_bit()/__clear_bit()/__test_and_set_bit allows to use an "unsigned int" for __state container, reducing by 8 bytes Qdisc size. Introduce helpers to hide implementation details. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Patrick McHardy <kaber@trash.net> CC: Jesper Dangaard Brouer <hawk@diku.dk> CC: Jarek Poplawski <jarkao2@gmail.com> CC: Jamal Hadi Salim <hadi@cyberus.ca> CC: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_api.c6
-rw-r--r--net/sched/sch_cbq.c6
-rw-r--r--net/sched/sch_hfsc.c2
-rw-r--r--net/sched/sch_htb.c4
-rw-r--r--net/sched/sch_netem.c2
-rw-r--r--net/sched/sch_tbf.c2
6 files changed, 11 insertions, 11 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 36ac0ec81ce0..374fcbef80e8 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -473,7 +473,7 @@ static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer)
struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog,
timer);
- wd->qdisc->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(wd->qdisc);
__netif_schedule(qdisc_root(wd->qdisc));
return HRTIMER_NORESTART;
@@ -495,7 +495,7 @@ void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, psched_time_t expires)
&qdisc_root_sleeping(wd->qdisc)->state))
return;
- wd->qdisc->flags |= TCQ_F_THROTTLED;
+ qdisc_throttled(wd->qdisc);
time = ktime_set(0, 0);
time = ktime_add_ns(time, PSCHED_TICKS2NS(expires));
hrtimer_start(&wd->timer, time, HRTIMER_MODE_ABS);
@@ -505,7 +505,7 @@ EXPORT_SYMBOL(qdisc_watchdog_schedule);
void qdisc_watchdog_cancel(struct qdisc_watchdog *wd)
{
hrtimer_cancel(&wd->timer);
- wd->qdisc->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(wd->qdisc);
}
EXPORT_SYMBOL(qdisc_watchdog_cancel);
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 4aaf44c95c52..25ed522b2891 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -351,7 +351,7 @@ cbq_mark_toplevel(struct cbq_sched_data *q, struct cbq_class *cl)
{
int toplevel = q->toplevel;
- if (toplevel > cl->level && !(cl->q->flags & TCQ_F_THROTTLED)) {
+ if (toplevel > cl->level && !(qdisc_is_throttled(cl->q))) {
psched_time_t now;
psched_tdiff_t incr;
@@ -625,7 +625,7 @@ static enum hrtimer_restart cbq_undelay(struct hrtimer *timer)
hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS);
}
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
__netif_schedule(qdisc_root(sch));
return HRTIMER_NORESTART;
}
@@ -974,7 +974,7 @@ cbq_dequeue(struct Qdisc *sch)
skb = cbq_dequeue_1(sch);
if (skb) {
sch->q.qlen--;
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
return skb;
}
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index dea4009615f9..b632d9251913 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1664,7 +1664,7 @@ hfsc_dequeue(struct Qdisc *sch)
set_passive(cl);
}
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
sch->q.qlen--;
return skb;
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 3e86fd3a1b78..39db75cd8c17 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -865,7 +865,7 @@ static struct sk_buff *htb_dequeue(struct Qdisc *sch)
/* try to dequeue direct packets as high prio (!) to minimize cpu work */
skb = __skb_dequeue(&q->direct_queue);
if (skb != NULL) {
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
sch->q.qlen--;
return skb;
}
@@ -901,7 +901,7 @@ static struct sk_buff *htb_dequeue(struct Qdisc *sch)
skb = htb_dequeue_tree(q, prio, level);
if (likely(skb != NULL)) {
sch->q.qlen--;
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
goto fin;
}
}
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index c2bbbe60d544..c26ef3614f7e 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -266,7 +266,7 @@ static struct sk_buff *netem_dequeue(struct Qdisc *sch)
struct netem_sched_data *q = qdisc_priv(sch);
struct sk_buff *skb;
- if (sch->flags & TCQ_F_THROTTLED)
+ if (qdisc_is_throttled(sch))
return NULL;
skb = q->qdisc->ops->peek(q->qdisc);
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 475edfb69c22..86c016696977 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -185,7 +185,7 @@ static struct sk_buff *tbf_dequeue(struct Qdisc *sch)
q->tokens = toks;
q->ptokens = ptoks;
sch->q.qlen--;
- sch->flags &= ~TCQ_F_THROTTLED;
+ qdisc_unthrottled(sch);
return skb;
}