summaryrefslogtreecommitdiffstats
path: root/net/sched/sch_cbq.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sched/sch_cbq.c')
-rw-r--r--net/sched/sch_cbq.c48
1 files changed, 14 insertions, 34 deletions
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index ead526467cca..762a04bb8f6d 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -159,7 +159,6 @@ struct cbq_sched_data {
struct cbq_class *tx_borrowed;
int tx_len;
psched_time_t now; /* Cached timestamp */
- psched_time_t now_rt; /* Cached real time */
unsigned int pmask;
struct hrtimer delay_timer;
@@ -353,12 +352,7 @@ cbq_mark_toplevel(struct cbq_sched_data *q, struct cbq_class *cl)
int toplevel = q->toplevel;
if (toplevel > cl->level && !(qdisc_is_throttled(cl->q))) {
- psched_time_t now;
- psched_tdiff_t incr;
-
- now = psched_get_time();
- incr = now - q->now_rt;
- now = q->now + incr;
+ psched_time_t now = psched_get_time();
do {
if (cl->undertime < now) {
@@ -700,8 +694,13 @@ cbq_update(struct cbq_sched_data *q)
struct cbq_class *this = q->tx_class;
struct cbq_class *cl = this;
int len = q->tx_len;
+ psched_time_t now;
q->tx_class = NULL;
+ /* Time integrator. We calculate EOS time
+ * by adding expected packet transmission time.
+ */
+ now = q->now + L2T(&q->link, len);
for ( ; cl; cl = cl->share) {
long avgidle = cl->avgidle;
@@ -717,7 +716,7 @@ cbq_update(struct cbq_sched_data *q)
* idle = (now - last) - last_pktlen/rate
*/
- idle = q->now - cl->last;
+ idle = now - cl->last;
if ((unsigned long)idle > 128*1024*1024) {
avgidle = cl->maxidle;
} else {
@@ -761,7 +760,7 @@ cbq_update(struct cbq_sched_data *q)
idle -= L2T(&q->link, len);
idle += L2T(cl, len);
- cl->undertime = q->now + idle;
+ cl->undertime = now + idle;
} else {
/* Underlimit */
@@ -771,7 +770,8 @@ cbq_update(struct cbq_sched_data *q)
else
cl->avgidle = avgidle;
}
- cl->last = q->now;
+ if ((s64)(now - cl->last) > 0)
+ cl->last = now;
}
cbq_update_toplevel(q, this, q->tx_borrowed);
@@ -943,31 +943,13 @@ cbq_dequeue(struct Qdisc *sch)
struct sk_buff *skb;
struct cbq_sched_data *q = qdisc_priv(sch);
psched_time_t now;
- psched_tdiff_t incr;
now = psched_get_time();
- incr = now - q->now_rt;
-
- if (q->tx_class) {
- psched_tdiff_t incr2;
- /* Time integrator. We calculate EOS time
- * by adding expected packet transmission time.
- * If real time is greater, we warp artificial clock,
- * so that:
- *
- * cbq_time = max(real_time, work);
- */
- incr2 = L2T(&q->link, q->tx_len);
- q->now += incr2;
+
+ if (q->tx_class)
cbq_update(q);
- if ((incr -= incr2) < 0)
- incr = 0;
- q->now += incr;
- } else {
- if (now > q->now)
- q->now = now;
- }
- q->now_rt = now;
+
+ q->now = now;
for (;;) {
q->wd_expires = 0;
@@ -1223,7 +1205,6 @@ cbq_reset(struct Qdisc *sch)
hrtimer_cancel(&q->delay_timer);
q->toplevel = TC_CBQ_MAXLEVEL;
q->now = psched_get_time();
- q->now_rt = q->now;
for (prio = 0; prio <= TC_CBQ_MAXPRIO; prio++)
q->active[prio] = NULL;
@@ -1407,7 +1388,6 @@ static int cbq_init(struct Qdisc *sch, struct nlattr *opt)
q->delay_timer.function = cbq_undelay;
q->toplevel = TC_CBQ_MAXLEVEL;
q->now = psched_get_time();
- q->now_rt = q->now;
cbq_link_class(&q->link);