hrtimers: Convert hrtimers to use timerlist infrastructure
Converts the hrtimer code to use the new timerlist infrastructure Signed-off-by: John Stultz <john.stultz@linaro.org> LKML Reference: <1290136329-18291-3-git-send-email-john.stultz@linaro.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> CC: Alessandro Zummo <a.zummo@towertech.it> CC: Thomas Gleixner <tglx@linutronix.de> CC: Richard Cochran <richardcochran@gmail.com>hifive-unleashed-5.1
John Stultz
parent
9bb99b1470
commit
998adc3dda
|
|
@ -22,7 +22,7 @@
|
|||
#include <linux/wait.h>
|
||||
#include <linux/percpu.h>
|
||||
#include <linux/timer.h>
|
||||
|
||||
#include <linux/timerqueue.h>
|
||||
|
||||
struct hrtimer_clock_base;
|
||||
struct hrtimer_cpu_base;
|
||||
|
|
@ -79,8 +79,8 @@ enum hrtimer_restart {
|
|||
|
||||
/**
|
||||
* struct hrtimer - the basic hrtimer structure
|
||||
* @node: red black tree node for time ordered insertion
|
||||
* @_expires: the absolute expiry time in the hrtimers internal
|
||||
* @node: timerqueue node, which also manages node.expires,
|
||||
* the absolute expiry time in the hrtimers internal
|
||||
* representation. The time is related to the clock on
|
||||
* which the timer is based. Is setup by adding
|
||||
* slack to the _softexpires value. For non range timers
|
||||
|
|
@ -101,8 +101,7 @@ enum hrtimer_restart {
|
|||
* The hrtimer structure must be initialized by hrtimer_init()
|
||||
*/
|
||||
struct hrtimer {
|
||||
struct rb_node node;
|
||||
ktime_t _expires;
|
||||
struct timerqueue_node node;
|
||||
ktime_t _softexpires;
|
||||
enum hrtimer_restart (*function)(struct hrtimer *);
|
||||
struct hrtimer_clock_base *base;
|
||||
|
|
@ -141,8 +140,7 @@ struct hrtimer_sleeper {
|
|||
struct hrtimer_clock_base {
|
||||
struct hrtimer_cpu_base *cpu_base;
|
||||
clockid_t index;
|
||||
struct rb_root active;
|
||||
struct rb_node *first;
|
||||
struct timerqueue_head active;
|
||||
ktime_t resolution;
|
||||
ktime_t (*get_time)(void);
|
||||
ktime_t softirq_time;
|
||||
|
|
@ -183,43 +181,43 @@ struct hrtimer_cpu_base {
|
|||
|
||||
static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
|
||||
{
|
||||
timer->_expires = time;
|
||||
timer->node.expires = time;
|
||||
timer->_softexpires = time;
|
||||
}
|
||||
|
||||
static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta)
|
||||
{
|
||||
timer->_softexpires = time;
|
||||
timer->_expires = ktime_add_safe(time, delta);
|
||||
timer->node.expires = ktime_add_safe(time, delta);
|
||||
}
|
||||
|
||||
static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, unsigned long delta)
|
||||
{
|
||||
timer->_softexpires = time;
|
||||
timer->_expires = ktime_add_safe(time, ns_to_ktime(delta));
|
||||
timer->node.expires = ktime_add_safe(time, ns_to_ktime(delta));
|
||||
}
|
||||
|
||||
static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64)
|
||||
{
|
||||
timer->_expires.tv64 = tv64;
|
||||
timer->node.expires.tv64 = tv64;
|
||||
timer->_softexpires.tv64 = tv64;
|
||||
}
|
||||
|
||||
static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time)
|
||||
{
|
||||
timer->_expires = ktime_add_safe(timer->_expires, time);
|
||||
timer->node.expires = ktime_add_safe(timer->node.expires, time);
|
||||
timer->_softexpires = ktime_add_safe(timer->_softexpires, time);
|
||||
}
|
||||
|
||||
static inline void hrtimer_add_expires_ns(struct hrtimer *timer, u64 ns)
|
||||
{
|
||||
timer->_expires = ktime_add_ns(timer->_expires, ns);
|
||||
timer->node.expires = ktime_add_ns(timer->node.expires, ns);
|
||||
timer->_softexpires = ktime_add_ns(timer->_softexpires, ns);
|
||||
}
|
||||
|
||||
static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
|
||||
{
|
||||
return timer->_expires;
|
||||
return timer->node.expires;
|
||||
}
|
||||
|
||||
static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
|
||||
|
|
@ -229,7 +227,7 @@ static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
|
|||
|
||||
static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer)
|
||||
{
|
||||
return timer->_expires.tv64;
|
||||
return timer->node.expires.tv64;
|
||||
}
|
||||
static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer)
|
||||
{
|
||||
|
|
@ -238,12 +236,12 @@ static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer)
|
|||
|
||||
static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer)
|
||||
{
|
||||
return ktime_to_ns(timer->_expires);
|
||||
return ktime_to_ns(timer->node.expires);
|
||||
}
|
||||
|
||||
static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
|
||||
{
|
||||
return ktime_sub(timer->_expires, timer->base->get_time());
|
||||
return ktime_sub(timer->node.expires, timer->base->get_time());
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HIGH_RES_TIMERS
|
||||
|
|
|
|||
|
|
@ -516,10 +516,13 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
|
|||
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
|
||||
struct hrtimer *timer;
|
||||
struct timerqueue_node *next;
|
||||
|
||||
if (!base->first)
|
||||
next = timerqueue_getnext(&base->active);
|
||||
if (!next)
|
||||
continue;
|
||||
timer = rb_entry(base->first, struct hrtimer, node);
|
||||
timer = container_of(next, struct hrtimer, node);
|
||||
|
||||
expires = ktime_sub(hrtimer_get_expires(timer), base->offset);
|
||||
/*
|
||||
* clock_was_set() has changed base->offset so the
|
||||
|
|
@ -840,48 +843,17 @@ EXPORT_SYMBOL_GPL(hrtimer_forward);
|
|||
static int enqueue_hrtimer(struct hrtimer *timer,
|
||||
struct hrtimer_clock_base *base)
|
||||
{
|
||||
struct rb_node **link = &base->active.rb_node;
|
||||
struct rb_node *parent = NULL;
|
||||
struct hrtimer *entry;
|
||||
int leftmost = 1;
|
||||
|
||||
debug_activate(timer);
|
||||
|
||||
/*
|
||||
* Find the right place in the rbtree:
|
||||
*/
|
||||
while (*link) {
|
||||
parent = *link;
|
||||
entry = rb_entry(parent, struct hrtimer, node);
|
||||
/*
|
||||
* We dont care about collisions. Nodes with
|
||||
* the same expiry time stay together.
|
||||
*/
|
||||
if (hrtimer_get_expires_tv64(timer) <
|
||||
hrtimer_get_expires_tv64(entry)) {
|
||||
link = &(*link)->rb_left;
|
||||
} else {
|
||||
link = &(*link)->rb_right;
|
||||
leftmost = 0;
|
||||
}
|
||||
}
|
||||
timerqueue_add(&base->active, &timer->node);
|
||||
|
||||
/*
|
||||
* Insert the timer to the rbtree and check whether it
|
||||
* replaces the first pending timer
|
||||
*/
|
||||
if (leftmost)
|
||||
base->first = &timer->node;
|
||||
|
||||
rb_link_node(&timer->node, parent, link);
|
||||
rb_insert_color(&timer->node, &base->active);
|
||||
/*
|
||||
* HRTIMER_STATE_ENQUEUED is or'ed to the current state to preserve the
|
||||
* state of a possibly running callback.
|
||||
*/
|
||||
timer->state |= HRTIMER_STATE_ENQUEUED;
|
||||
|
||||
return leftmost;
|
||||
return (&timer->node == base->active.next);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -901,12 +873,7 @@ static void __remove_hrtimer(struct hrtimer *timer,
|
|||
if (!(timer->state & HRTIMER_STATE_ENQUEUED))
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Remove the timer from the rbtree and replace the first
|
||||
* entry pointer if necessary.
|
||||
*/
|
||||
if (base->first == &timer->node) {
|
||||
base->first = rb_next(&timer->node);
|
||||
if (&timer->node == timerqueue_getnext(&base->active)) {
|
||||
#ifdef CONFIG_HIGH_RES_TIMERS
|
||||
/* Reprogram the clock event device. if enabled */
|
||||
if (reprogram && hrtimer_hres_active()) {
|
||||
|
|
@ -919,7 +886,7 @@ static void __remove_hrtimer(struct hrtimer *timer,
|
|||
}
|
||||
#endif
|
||||
}
|
||||
rb_erase(&timer->node, &base->active);
|
||||
timerqueue_del(&base->active, &timer->node);
|
||||
out:
|
||||
timer->state = newstate;
|
||||
}
|
||||
|
|
@ -1123,11 +1090,13 @@ ktime_t hrtimer_get_next_event(void)
|
|||
if (!hrtimer_hres_active()) {
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
|
||||
struct hrtimer *timer;
|
||||
struct timerqueue_node *next;
|
||||
|
||||
if (!base->first)
|
||||
next = timerqueue_getnext(&base->active);
|
||||
if (!next)
|
||||
continue;
|
||||
|
||||
timer = rb_entry(base->first, struct hrtimer, node);
|
||||
timer = container_of(next, struct hrtimer, node);
|
||||
delta.tv64 = hrtimer_get_expires_tv64(timer);
|
||||
delta = ktime_sub(delta, base->get_time());
|
||||
if (delta.tv64 < mindelta.tv64)
|
||||
|
|
@ -1157,6 +1126,7 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
|
|||
|
||||
timer->base = &cpu_base->clock_base[clock_id];
|
||||
hrtimer_init_timer_hres(timer);
|
||||
timerqueue_init(&timer->node);
|
||||
|
||||
#ifdef CONFIG_TIMER_STATS
|
||||
timer->start_site = NULL;
|
||||
|
|
@ -1270,14 +1240,14 @@ retry:
|
|||
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
|
||||
ktime_t basenow;
|
||||
struct rb_node *node;
|
||||
struct timerqueue_node *node;
|
||||
|
||||
basenow = ktime_add(now, base->offset);
|
||||
|
||||
while ((node = base->first)) {
|
||||
while ((node = timerqueue_getnext(&base->active))) {
|
||||
struct hrtimer *timer;
|
||||
|
||||
timer = rb_entry(node, struct hrtimer, node);
|
||||
timer = container_of(node, struct hrtimer, node);
|
||||
|
||||
/*
|
||||
* The immediate goal for using the softexpires is
|
||||
|
|
@ -1433,7 +1403,7 @@ void hrtimer_run_pending(void)
|
|||
*/
|
||||
void hrtimer_run_queues(void)
|
||||
{
|
||||
struct rb_node *node;
|
||||
struct timerqueue_node *node;
|
||||
struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
|
||||
struct hrtimer_clock_base *base;
|
||||
int index, gettime = 1;
|
||||
|
|
@ -1442,9 +1412,11 @@ void hrtimer_run_queues(void)
|
|||
return;
|
||||
|
||||
for (index = 0; index < HRTIMER_MAX_CLOCK_BASES; index++) {
|
||||
base = &cpu_base->clock_base[index];
|
||||
struct timerqueue_node *next;
|
||||
|
||||
if (!base->first)
|
||||
base = &cpu_base->clock_base[index];
|
||||
next = timerqueue_getnext(&base->active);
|
||||
if (!next)
|
||||
continue;
|
||||
|
||||
if (gettime) {
|
||||
|
|
@ -1454,10 +1426,10 @@ void hrtimer_run_queues(void)
|
|||
|
||||
raw_spin_lock(&cpu_base->lock);
|
||||
|
||||
while ((node = base->first)) {
|
||||
while ((node = next)) {
|
||||
struct hrtimer *timer;
|
||||
|
||||
timer = rb_entry(node, struct hrtimer, node);
|
||||
timer = container_of(node, struct hrtimer, node);
|
||||
if (base->softirq_time.tv64 <=
|
||||
hrtimer_get_expires_tv64(timer))
|
||||
break;
|
||||
|
|
@ -1622,8 +1594,10 @@ static void __cpuinit init_hrtimers_cpu(int cpu)
|
|||
|
||||
raw_spin_lock_init(&cpu_base->lock);
|
||||
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
|
||||
cpu_base->clock_base[i].cpu_base = cpu_base;
|
||||
timerqueue_init_head(&cpu_base->clock_base[i].active);
|
||||
}
|
||||
|
||||
hrtimer_init_hres(cpu_base);
|
||||
}
|
||||
|
|
@ -1634,10 +1608,10 @@ static void migrate_hrtimer_list(struct hrtimer_clock_base *old_base,
|
|||
struct hrtimer_clock_base *new_base)
|
||||
{
|
||||
struct hrtimer *timer;
|
||||
struct rb_node *node;
|
||||
struct timerqueue_node *node;
|
||||
|
||||
while ((node = rb_first(&old_base->active))) {
|
||||
timer = rb_entry(node, struct hrtimer, node);
|
||||
while ((node = timerqueue_getnext(&old_base->active))) {
|
||||
timer = container_of(node, struct hrtimer, node);
|
||||
BUG_ON(hrtimer_callback_running(timer));
|
||||
debug_deactivate(timer);
|
||||
|
||||
|
|
|
|||
|
|
@ -79,26 +79,26 @@ print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base,
|
|||
{
|
||||
struct hrtimer *timer, tmp;
|
||||
unsigned long next = 0, i;
|
||||
struct rb_node *curr;
|
||||
struct timerqueue_node *curr;
|
||||
unsigned long flags;
|
||||
|
||||
next_one:
|
||||
i = 0;
|
||||
raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
|
||||
|
||||
curr = base->first;
|
||||
curr = timerqueue_getnext(&base->active);
|
||||
/*
|
||||
* Crude but we have to do this O(N*N) thing, because
|
||||
* we have to unlock the base when printing:
|
||||
*/
|
||||
while (curr && i < next) {
|
||||
curr = rb_next(curr);
|
||||
curr = timerqueue_iterate_next(curr);
|
||||
i++;
|
||||
}
|
||||
|
||||
if (curr) {
|
||||
|
||||
timer = rb_entry(curr, struct hrtimer, node);
|
||||
timer = container_of(curr, struct hrtimer, node);
|
||||
tmp = *timer;
|
||||
raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue