Lines Matching +full:timeout +full:- +full:ms
1 // SPDX-License-Identifier: GPL-2.0
7 * 1997-01-28 Modified by Finn Arne Gangstad to make timers scale better.
9 * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
11 * 1998-12-24 Fixed a xtime SMP race (we need the xtime_lock rw spinlock to
14 * 1999-03-10 Improved NTP compatibility by Ulrich Windl
15 * 2002-05-31 Move sys_sysinfo here and make its locking sane, Robert Love
16 * 2000-10-05 Implemented scalable SMP per-CPU timer handling.
33 #include <linux/posix-timers.h>
55 #include "tick-internal.h"
85 * timeout timers (networking, disk I/O ...) are canceled before expiry. If
86 * the timeout expires it indicates that normal operation is disturbed, so it
87 * does not matter much whether the timeout comes with a slight delay.
94 * capacity of the last wheel level are force expired at the maximum timeout
106 * 0 0 1 ms 0 ms - 63 ms
107 * 1 64 8 ms 64 ms - 511 ms
108 * 2 128 64 ms 512 ms - 4095 ms (512ms - ~4s)
109 * 3 192 512 ms 4096 ms - 32767 ms (~4s - ~32s)
110 * 4 256 4096 ms (~4s) 32768 ms - 262143 ms (~32s - ~4m)
111 * 5 320 32768 ms (~32s) 262144 ms - 2097151 ms (~4m - ~34m)
112 * 6 384 262144 ms (~4m) 2097152 ms - 16777215 ms (~34m - ~4h)
113 * 7 448 2097152 ms (~34m) 16777216 ms - 134217727 ms (~4h - ~1d)
114 * 8 512 16777216 ms (~4h) 134217728 ms - 1073741822 ms (~1d - ~12d)
118 * 0 0 3 ms 0 ms - 210 ms
119 * 1 64 26 ms 213 ms - 1703 ms (213ms - ~1s)
120 * 2 128 213 ms 1706 ms - 13650 ms (~1s - ~13s)
121 * 3 192 1706 ms (~1s) 13653 ms - 109223 ms (~13s - ~1m)
122 * 4 256 13653 ms (~13s) 109226 ms - 873810 ms (~1m - ~14m)
123 * 5 320 109226 ms (~1m) 873813 ms - 6990503 ms (~14m - ~1h)
124 * 6 384 873813 ms (~14m) 6990506 ms - 55924050 ms (~1h - ~15h)
125 * 7 448 6990506 ms (~1h) 55924053 ms - 447392423 ms (~15h - ~5d)
126 * 8 512 55924053 ms (~15h) 447392426 ms - 3579139406 ms (~5d - ~41d)
130 * 0 0 4 ms 0 ms - 255 ms
131 * 1 64 32 ms 256 ms - 2047 ms (256ms - ~2s)
132 * 2 128 256 ms 2048 ms - 16383 ms (~2s - ~16s)
133 * 3 192 2048 ms (~2s) 16384 ms - 131071 ms (~16s - ~2m)
134 * 4 256 16384 ms (~16s) 131072 ms - 1048575 ms (~2m - ~17m)
135 * 5 320 131072 ms (~2m) 1048576 ms - 8388607 ms (~17m - ~2h)
136 * 6 384 1048576 ms (~17m) 8388608 ms - 67108863 ms (~2h - ~18h)
137 * 7 448 8388608 ms (~2h) 67108864 ms - 536870911 ms (~18h - ~6d)
138 * 8 512 67108864 ms (~18h) 536870912 ms - 4294967288 ms (~6d - ~49d)
142 * 0 0 10 ms 0 ms - 630 ms
143 * 1 64 80 ms 640 ms - 5110 ms (640ms - ~5s)
144 * 2 128 640 ms 5120 ms - 40950 ms (~5s - ~40s)
145 * 3 192 5120 ms (~5s) 40960 ms - 327670 ms (~40s - ~5m)
146 * 4 256 40960 ms (~40s) 327680 ms - 2621430 ms (~5m - ~43m)
147 * 5 320 327680 ms (~5m) 2621440 ms - 20971510 ms (~43m - ~5h)
148 * 6 384 2621440 ms (~43m) 20971520 ms - 167772150 ms (~5h - ~1d)
149 * 7 448 20971520 ms (~5h) 167772160 ms - 1342177270 ms (~1d - ~15d)
155 #define LVL_CLK_MASK (LVL_CLK_DIV - 1)
164 #define LVL_START(n) ((LVL_SIZE - 1) << (((n) - 1) * LVL_CLK_SHIFT))
169 #define LVL_MASK (LVL_SIZE - 1)
181 #define WHEEL_TIMEOUT_MAX (WHEEL_TIMEOUT_CUTOFF - LVL_GRAN(LVL_DEPTH - 1))
324 j = j - rem; in round_jiffies_common()
326 j = j - rem + HZ; in round_jiffies_common()
329 j -= cpu * 3; in round_jiffies_common()
339 * __round_jiffies - function to round jiffies to a full second
341 * @cpu: the processor number on which the timeout will happen
365 * __round_jiffies_relative - function to round jiffies to a full second
367 * @cpu: the processor number on which the timeout will happen
389 return round_jiffies_common(j + j0, cpu, false) - j0; in __round_jiffies_relative()
394 * round_jiffies - function to round jiffies to a full second
415 * round_jiffies_relative - function to round jiffies to a full second
436 * __round_jiffies_up - function to round jiffies up to a full second
438 * @cpu: the processor number on which the timeout will happen
452 * __round_jiffies_up_relative - function to round jiffies up to a full second
454 * @cpu: the processor number on which the timeout will happen
466 return round_jiffies_common(j + j0, cpu, true) - j0; in __round_jiffies_up_relative()
471 * round_jiffies_up - function to round jiffies up to a full second
486 * round_jiffies_up_relative - function to round jiffies up to a full second
503 return (timer->flags & TIMER_ARRAYMASK) >> TIMER_ARRAYSHIFT; in timer_get_idx()
508 timer->flags = (timer->flags & ~TIMER_ARRAYMASK) | in timer_set_idx()
523 * - Timer is armed at the edge of a tick in calc_index()
524 * - Truncation of the expiry time in the outer wheel levels in calc_index()
536 unsigned long delta = expires - clk; in calc_wheel_index()
566 idx = calc_index(expires, LVL_DEPTH - 1, bucket_expiry); in calc_wheel_index()
581 if (timer->flags & TIMER_DEFERRABLE) { in trigger_dyntick_cpu()
582 if (tick_nohz_full_cpu(base->cpu)) in trigger_dyntick_cpu()
583 wake_up_nohz_cpu(base->cpu); in trigger_dyntick_cpu()
590 * then it can't set base->is_idle as we hold the base lock: in trigger_dyntick_cpu()
592 if (base->is_idle) in trigger_dyntick_cpu()
593 wake_up_nohz_cpu(base->cpu); in trigger_dyntick_cpu()
605 hlist_add_head(&timer->entry, base->vectors + idx); in enqueue_timer()
606 __set_bit(idx, base->pending_map); in enqueue_timer()
609 trace_timer_start(timer, timer->expires, timer->flags); in enqueue_timer()
614 * (bucket_expiry) instead of timer->expires. in enqueue_timer()
616 if (time_before(bucket_expiry, base->next_expiry)) { in enqueue_timer()
621 base->next_expiry = bucket_expiry; in enqueue_timer()
622 base->timers_pending = true; in enqueue_timer()
623 base->next_expiry_recalc = false; in enqueue_timer()
633 idx = calc_wheel_index(timer->expires, base->clk, &bucket_expiry); in internal_add_timer()
649 .offset = offsetof(container, hintfn) - \
666 if (timer_hints[i].function == timer->function) { in timer_debug_hint()
673 return timer->function; in timer_debug_hint()
680 return (timer->entry.pprev == NULL && in timer_is_static_object()
681 timer->entry.next == TIMER_ENTRY_STATIC); in timer_is_static_object()
686 * - an active object is initialized
710 * - an active object is activated
711 * - an unknown non-static object is activated
732 * - an active object is freed
750 * - an untracked/uninit-ed object is found
845 timer->entry.pprev = NULL; in do_init_timer()
846 timer->function = func; in do_init_timer()
849 timer->flags = flags | raw_smp_processor_id(); in do_init_timer()
850 lockdep_init_map(&timer->lockdep_map, name, key, 0); in do_init_timer()
854 * init_timer_key - initialize a timer
876 struct hlist_node *entry = &timer->entry; in detach_timer()
882 entry->pprev = NULL; in detach_timer()
883 entry->next = LIST_POISON2; in detach_timer()
894 if (hlist_is_singular_node(&timer->entry, base->vectors + idx)) { in detach_if_pending()
895 __clear_bit(idx, base->pending_map); in detach_if_pending()
896 base->next_expiry_recalc = true; in detach_if_pending()
951 * Also while executing timers, base->clk is 1 offset ahead in forward_timer_base()
954 if ((long)(jnow - base->clk) < 1) in forward_timer_base()
961 if (time_after(base->next_expiry, jnow)) { in forward_timer_base()
962 base->clk = jnow; in forward_timer_base()
964 if (WARN_ON_ONCE(time_before(base->next_expiry, base->clk))) in forward_timer_base()
966 base->clk = base->next_expiry; in forward_timer_base()
977 * be found in the base->vectors array.
984 __acquires(timer->base->lock) in lock_timer_base()
992 * might re-read @tf between the check for TIMER_MIGRATING in lock_timer_base()
995 tf = READ_ONCE(timer->flags); in lock_timer_base()
999 raw_spin_lock_irqsave(&base->lock, *flags); in lock_timer_base()
1000 if (timer->flags == tf) in lock_timer_base()
1002 raw_spin_unlock_irqrestore(&base->lock, *flags); in lock_timer_base()
1020 BUG_ON(!timer->function); in __mod_timer()
1023 * This is a common optimization triggered by the networking code - if in __mod_timer()
1024 * the timer is re-modified to have the same timeout or ends up in the in __mod_timer()
1033 long diff = timer->expires - expires; in __mod_timer()
1050 time_before_eq(timer->expires, expires)) { in __mod_timer()
1055 clk = base->clk; in __mod_timer()
1065 timer->expires = expires; in __mod_timer()
1066 else if (time_after(timer->expires, expires)) in __mod_timer()
1067 timer->expires = expires; in __mod_timer()
1080 new_base = get_target_base(base, timer->flags); in __mod_timer()
1090 if (likely(base->running_timer != timer)) { in __mod_timer()
1092 timer->flags |= TIMER_MIGRATING; in __mod_timer()
1094 raw_spin_unlock(&base->lock); in __mod_timer()
1096 raw_spin_lock(&base->lock); in __mod_timer()
1097 WRITE_ONCE(timer->flags, in __mod_timer()
1098 (timer->flags & ~TIMER_BASEMASK) | base->cpu); in __mod_timer()
1105 timer->expires = expires; in __mod_timer()
1112 if (idx != UINT_MAX && clk == base->clk) in __mod_timer()
1118 raw_spin_unlock_irqrestore(&base->lock, flags); in __mod_timer()
1124 * mod_timer_pending - modify a pending timer's timeout
1126 * @expires: new timeout in jiffies
1129 * but will not re-activate and modify already deleted timers.
1140 * mod_timer - modify a timer's timeout
1142 * @expires: new timeout in jiffies
1149 * del_timer(timer); timer->expires = expires; add_timer(timer);
1152 * same timer, then mod_timer() is the only safe way to modify the timeout,
1166 * timer_reduce - Modify a timer's timeout if it would reduce the timeout
1168 * @expires: New timeout in jiffies
1181 * add_timer - start a timer
1184 * The kernel will do a ->function(@timer) callback from the
1185 * timer interrupt at the ->expires point in the future. The
1188 * The timer's ->expires, ->function fields must be set prior calling this
1191 * Timers with an ->expires field in the past will be executed in the next
1197 __mod_timer(timer, timer->expires, MOD_TIMER_NOTPENDING); in add_timer()
1202 * add_timer_on - start a timer on a particular CPU
1213 BUG_ON(timer_pending(timer) || !timer->function); in add_timer_on()
1215 new_base = get_timer_cpu_base(timer->flags, cpu); in add_timer_on()
1224 timer->flags |= TIMER_MIGRATING; in add_timer_on()
1226 raw_spin_unlock(&base->lock); in add_timer_on()
1228 raw_spin_lock(&base->lock); in add_timer_on()
1229 WRITE_ONCE(timer->flags, in add_timer_on()
1230 (timer->flags & ~TIMER_BASEMASK) | cpu); in add_timer_on()
1236 raw_spin_unlock_irqrestore(&base->lock, flags); in add_timer_on()
1241 * del_timer - deactivate a timer.
1244 * del_timer() deactivates a timer - this works on both active and inactive
1262 raw_spin_unlock_irqrestore(&base->lock, flags); in del_timer()
1270 * try_to_del_timer_sync - Try to deactivate a timer
1280 int ret = -1; in try_to_del_timer_sync()
1286 if (base->running_timer != timer) in try_to_del_timer_sync()
1289 raw_spin_unlock_irqrestore(&base->lock, flags); in try_to_del_timer_sync()
1298 spin_lock_init(&base->expiry_lock); in timer_base_init_expiry_lock()
1303 spin_lock(&base->expiry_lock); in timer_base_lock_expiry()
1308 spin_unlock(&base->expiry_lock); in timer_base_unlock_expiry()
1314 * If there is a waiter for base->expiry_lock, then it was waiting for the
1320 if (atomic_read(&base->timer_waiters)) { in timer_sync_wait_running()
1321 raw_spin_unlock_irq(&base->lock); in timer_sync_wait_running()
1322 spin_unlock(&base->expiry_lock); in timer_sync_wait_running()
1323 spin_lock(&base->expiry_lock); in timer_sync_wait_running()
1324 raw_spin_lock_irq(&base->lock); in timer_sync_wait_running()
1342 tf = READ_ONCE(timer->flags); in del_timer_wait_running()
1354 atomic_inc(&base->timer_waiters); in del_timer_wait_running()
1355 spin_lock_bh(&base->expiry_lock); in del_timer_wait_running()
1356 atomic_dec(&base->timer_waiters); in del_timer_wait_running()
1357 spin_unlock_bh(&base->expiry_lock); in del_timer_wait_running()
1370 * del_timer_sync - deactivate a timer and wait for the handler to finish.
1389 * ---- ----
1392 * base->running_timer = mytimer;
1397 * while (base->running_timer == mytimer);
1417 lock_map_acquire(&timer->lockdep_map); in del_timer_sync()
1418 lock_map_release(&timer->lockdep_map); in del_timer_sync()
1425 WARN_ON(in_irq() && !(timer->flags & TIMER_IRQSAFE)); in del_timer_sync()
1431 if (IS_ENABLED(CONFIG_PREEMPT_RT) && !(timer->flags & TIMER_IRQSAFE)) in del_timer_sync()
1460 * timer->lockdep_map, make a copy and use that here. in call_timer_fn()
1464 lockdep_copy_map(&lockdep_map, &timer->lockdep_map); in call_timer_fn()
1480 WARN_ONCE(1, "timer: %pS preempt leak: %08x -> %08x\n", in call_timer_fn()
1495 * This value is required only for tracing. base->clk was in expire_timers()
1497 * is related to the old base->clk value. in expire_timers()
1499 unsigned long baseclk = base->clk - 1; in expire_timers()
1505 timer = hlist_entry(head->first, struct timer_list, entry); in expire_timers()
1507 base->running_timer = timer; in expire_timers()
1510 fn = timer->function; in expire_timers()
1512 if (timer->flags & TIMER_IRQSAFE) { in expire_timers()
1513 raw_spin_unlock(&base->lock); in expire_timers()
1515 raw_spin_lock(&base->lock); in expire_timers()
1516 base->running_timer = NULL; in expire_timers()
1518 raw_spin_unlock_irq(&base->lock); in expire_timers()
1520 raw_spin_lock_irq(&base->lock); in expire_timers()
1521 base->running_timer = NULL; in expire_timers()
1530 unsigned long clk = base->clk = base->next_expiry; in collect_expired_timers()
1538 if (__test_and_clear_bit(idx, base->pending_map)) { in collect_expired_timers()
1539 vec = base->vectors + idx; in collect_expired_timers()
1563 pos = find_next_bit(base->pending_map, end, start); in next_pending_bucket()
1565 return pos - start; in next_pending_bucket()
1567 pos = find_next_bit(base->pending_map, start, offset); in next_pending_bucket()
1568 return pos < start ? pos + LVL_SIZE - start : -1; in next_pending_bucket()
1573 * hold base->lock.
1580 next = base->clk + NEXT_TIMER_MAX_DELTA; in __next_timer_interrupt()
1581 clk = base->clk; in __next_timer_interrupt()
1597 if (pos <= ((LVL_CLK_DIV - lvl_clk) & LVL_CLK_MASK)) in __next_timer_interrupt()
1604 * next expiring bucket in that level. base->clk is the next in __next_timer_interrupt()
1641 base->next_expiry_recalc = false; in __next_timer_interrupt()
1642 base->timers_pending = !(next == base->clk + NEXT_TIMER_MAX_DELTA); in __next_timer_interrupt()
1682 * get_next_timer_interrupt - return the time (clock mono) of the next timer
1702 raw_spin_lock(&base->lock); in get_next_timer_interrupt()
1703 if (base->next_expiry_recalc) in get_next_timer_interrupt()
1704 base->next_expiry = __next_timer_interrupt(base); in get_next_timer_interrupt()
1705 nextevt = base->next_expiry; in get_next_timer_interrupt()
1709 * base. We can only do that when @basej is past base->clk in get_next_timer_interrupt()
1710 * otherwise we might rewind base->clk. in get_next_timer_interrupt()
1712 if (time_after(basej, base->clk)) { in get_next_timer_interrupt()
1714 base->clk = basej; in get_next_timer_interrupt()
1715 else if (time_after(nextevt, base->clk)) in get_next_timer_interrupt()
1716 base->clk = nextevt; in get_next_timer_interrupt()
1721 base->is_idle = false; in get_next_timer_interrupt()
1723 if (base->timers_pending) in get_next_timer_interrupt()
1724 expires = basem + (u64)(nextevt - basej) * TICK_NSEC; in get_next_timer_interrupt()
1732 if ((expires - basem) > TICK_NSEC) in get_next_timer_interrupt()
1733 base->is_idle = true; in get_next_timer_interrupt()
1735 raw_spin_unlock(&base->lock); in get_next_timer_interrupt()
1741 * timer_clear_idle - Clear the idle state of the timer base
1755 base->is_idle = false; in timer_clear_idle()
1760 * __run_timers - run all expired timers (if any) on this CPU.
1768 if (time_before(jiffies, base->next_expiry)) in __run_timers()
1772 raw_spin_lock_irq(&base->lock); in __run_timers()
1774 while (time_after_eq(jiffies, base->clk) && in __run_timers()
1775 time_after_eq(jiffies, base->next_expiry)) { in __run_timers()
1784 WARN_ON_ONCE(!levels && !base->next_expiry_recalc in __run_timers()
1785 && base->timers_pending); in __run_timers()
1786 base->clk++; in __run_timers()
1787 base->next_expiry = __next_timer_interrupt(base); in __run_timers()
1789 while (levels--) in __run_timers()
1792 raw_spin_unlock_irq(&base->lock); in __run_timers()
1797 * This function runs timers and the timer-tq in bottom half context.
1809 * Called by the local, per-CPU timer interrupt on SMP.
1817 if (time_before(jiffies, base->next_expiry)) { in run_local_timers()
1822 if (time_before(jiffies, base->next_expiry)) in run_local_timers()
1860 struct process_timer *timeout = from_timer(timeout, t, timer); in process_timeout() local
1862 wake_up_process(timeout->task); in process_timeout()
1866 * schedule_timeout - sleep until timeout
1867 * @timeout: timeout value in jiffies
1869 * Make the current task sleep until @timeout jiffies have elapsed.
1873 * %TASK_RUNNING - the scheduler is called, but the task does not sleep
1877 * %TASK_UNINTERRUPTIBLE - at least @timeout jiffies are guaranteed to
1881 * %TASK_INTERRUPTIBLE - the routine may return early if a signal is
1888 * Specifying a @timeout value of %MAX_SCHEDULE_TIMEOUT will schedule
1889 * the CPU away without a bound on the timeout. In this case the return
1894 * to be non-negative.
1896 signed long __sched schedule_timeout(signed long timeout) in schedule_timeout() argument
1901 switch (timeout) in schedule_timeout()
1921 if (timeout < 0) { in schedule_timeout()
1922 printk(KERN_ERR "schedule_timeout: wrong timeout " in schedule_timeout()
1923 "value %lx\n", timeout); in schedule_timeout()
1930 expire = timeout + jiffies; in schedule_timeout()
1941 timeout = expire - jiffies; in schedule_timeout()
1944 return timeout < 0 ? 0 : timeout; in schedule_timeout()
1952 signed long __sched schedule_timeout_interruptible(signed long timeout) in schedule_timeout_interruptible() argument
1955 return schedule_timeout(timeout); in schedule_timeout_interruptible()
1959 signed long __sched schedule_timeout_killable(signed long timeout) in schedule_timeout_killable() argument
1962 return schedule_timeout(timeout); in schedule_timeout_killable()
1966 signed long __sched schedule_timeout_uninterruptible(signed long timeout) in schedule_timeout_uninterruptible() argument
1969 return schedule_timeout(timeout); in schedule_timeout_uninterruptible()
1977 signed long __sched schedule_timeout_idle(signed long timeout) in schedule_timeout_idle() argument
1980 return schedule_timeout(timeout); in schedule_timeout_idle()
1988 int cpu = new_base->cpu; in migrate_timer_list()
1991 timer = hlist_entry(head->first, struct timer_list, entry); in migrate_timer_list()
1993 timer->flags = (timer->flags & ~TIMER_BASEMASK) | cpu; in migrate_timer_list()
2005 base->clk = jiffies; in timers_prepare_cpu()
2006 base->next_expiry = base->clk + NEXT_TIMER_MAX_DELTA; in timers_prepare_cpu()
2007 base->next_expiry_recalc = false; in timers_prepare_cpu()
2008 base->timers_pending = false; in timers_prepare_cpu()
2009 base->is_idle = false; in timers_prepare_cpu()
2029 raw_spin_lock_irq(&new_base->lock); in timers_dead_cpu()
2030 raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); in timers_dead_cpu()
2038 BUG_ON(old_base->running_timer); in timers_dead_cpu()
2041 migrate_timer_list(new_base, old_base->vectors + i); in timers_dead_cpu()
2043 raw_spin_unlock(&old_base->lock); in timers_dead_cpu()
2044 raw_spin_unlock_irq(&new_base->lock); in timers_dead_cpu()
2059 base->cpu = cpu; in init_timer_cpu()
2060 raw_spin_lock_init(&base->lock); in init_timer_cpu()
2061 base->clk = jiffies; in init_timer_cpu()
2062 base->next_expiry = base->clk + NEXT_TIMER_MAX_DELTA; in init_timer_cpu()
2083 * msleep - sleep safely even with waitqueue interruptions
2088 unsigned long timeout = msecs_to_jiffies(msecs) + 1; in msleep() local
2090 while (timeout) in msleep()
2091 timeout = schedule_timeout_uninterruptible(timeout); in msleep()
2097 * msleep_interruptible - sleep waiting for signals
2102 unsigned long timeout = msecs_to_jiffies(msecs) + 1; in msleep_interruptible() local
2104 while (timeout && !signal_pending(current)) in msleep_interruptible()
2105 timeout = schedule_timeout_interruptible(timeout); in msleep_interruptible()
2106 return jiffies_to_msecs(timeout); in msleep_interruptible()
2112 * usleep_range_state - Sleep for an approximate time in a given state
2117 * In non-atomic context where the exact wakeup time is flexible, use
2119 * by avoiding the CPU-hogging busy-wait of udelay(), and the range reduces
2120 * power usage by allowing hrtimers to take advantage of an already-
2127 u64 delta = (u64)(max - min) * NSEC_PER_USEC; in usleep_range_state()