diff options
| author | Vedang Patel <vedang.patel@intel.com> | 2019-06-25 15:07:15 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-28 14:45:33 -0700 |
| commit | 037be0374078e205ca802ca8716dabb6064f940e (patch) | |
| tree | 9eb7248622e8697c6f5e518cbaa69116632bf950 /net/sched | |
| parent | d14d2b20680f02fa739c2cbbb59e3629e487f359 (diff) | |
taprio: calculate cycle_time when schedule is installed
cycle time for a particular schedule is calculated only when it is first
installed. So, it makes sense to just calculate it once right after the
'cycle_time' parameter has been parsed and store it in cycle_time.
Signed-off-by: Vedang Patel <vedang.patel@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_taprio.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 9ecfb8f5902a..a41d7d4434ee 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -108,22 +108,6 @@ static void switch_schedules(struct taprio_sched *q, *admin = NULL; } -static ktime_t get_cycle_time(struct sched_gate_list *sched) -{ - struct sched_entry *entry; - ktime_t cycle = 0; - - if (sched->cycle_time != 0) - return sched->cycle_time; - - list_for_each_entry(entry, &sched->entries, list) - cycle = ktime_add_ns(cycle, entry->interval); - - sched->cycle_time = cycle; - - return cycle; -} - static int taprio_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free) { @@ -524,6 +508,15 @@ static int parse_taprio_schedule(struct nlattr **tb, if (err < 0) return err; + if (!new->cycle_time) { + struct sched_entry *entry; + ktime_t cycle = 0; + + list_for_each_entry(entry, &new->entries, list) + cycle = ktime_add_ns(cycle, entry->interval); + new->cycle_time = cycle; + } + return 0; } @@ -605,7 +598,7 @@ static int taprio_get_start_time(struct Qdisc *sch, return 0; } - cycle = get_cycle_time(sched); + cycle = sched->cycle_time; /* The qdisc is expected to have at least one sched_entry. Moreover, * any entry must have 'interval' > 0. Thus if the cycle time is zero, @@ -632,7 +625,7 @@ static void setup_first_close_time(struct taprio_sched *q, first = list_first_entry(&sched->entries, struct sched_entry, list); - cycle = get_cycle_time(sched); + cycle = sched->cycle_time; /* FIXME: find a better place to do this */ sched->cycle_close_time = ktime_add_ns(base, cycle); |