/* * The resolution of the clocks. The resolution value is returned in * the clock_getres() system call to give application programmers an * idea of the (in)accuracy of timers. Timer values are rounded up to * this resolution values.
*/ # define HIGH_RES_NSEC 1 # define KTIME_HIGH_RES (HIGH_RES_NSEC) # define MONOTONIC_RES_NSEC HIGH_RES_NSEC # define KTIME_MONOTONIC_RES KTIME_HIGH_RES
/** * struct hrtimer_clock_base - the timer base for a specific clock * @cpu_base: per cpu clock base * @index: clock type index for per_cpu support when moving a * timer to a base on another cpu. * @clockid: clock id for per_cpu support * @seq: seqcount around __run_hrtimer * @running: pointer to the currently running hrtimer * @active: red black tree root node for the active timers * @get_time: function to retrieve the current time of the clock * @offset: offset of this clock to the monotonic base
*/ struct hrtimer_clock_base { struct hrtimer_cpu_base *cpu_base; unsignedint index;
clockid_t clockid;
seqcount_raw_spinlock_t seq; struct hrtimer *running; struct timerqueue_head active;
ktime_t (*get_time)(void);
ktime_t offset;
} __hrtimer_clock_base_align;
/** * struct hrtimer_cpu_base - the per cpu clock bases * @lock: lock protecting the base and associated clock bases * and timers * @cpu: cpu number * @active_bases: Bitfield to mark bases with active timers * @clock_was_set_seq: Sequence counter of clock was set events * @hres_active: State of high resolution mode * @in_hrtirq: hrtimer_interrupt() is currently executing * @hang_detected: The last hrtimer interrupt detected a hang * @softirq_activated: displays, if the softirq is raised - update of softirq * related settings is not required then. * @nr_events: Total number of hrtimer interrupt events * @nr_retries: Total number of hrtimer interrupt retries * @nr_hangs: Total number of hrtimer interrupt hangs * @max_hang_time: Maximum time spent in hrtimer_interrupt * @softirq_expiry_lock: Lock which is taken while softirq based hrtimer are * expired * @online: CPU is online from an hrtimers point of view * @timer_waiters: A hrtimer_cancel() invocation waits for the timer * callback to finish. * @expires_next: absolute time of the next event, is required for remote * hrtimer enqueue; it is the total first expiry time (hard * and soft hrtimer are taken into account) * @next_timer: Pointer to the first expiring timer * @softirq_expires_next: Time to check, if soft queues needs also to be expired * @softirq_next_timer: Pointer to the first expiring softirq based timer * @clock_base: array of clock bases for this cpu * * Note: next_timer is just an optimization for __remove_hrtimer(). * Do not dereference the pointer because it is not reliable on * cross cpu removals.
*/ struct hrtimer_cpu_base {
raw_spinlock_t lock; unsignedint cpu; unsignedint active_bases; unsignedint clock_was_set_seq; unsignedint hres_active : 1,
in_hrtirq : 1,
hang_detected : 1,
softirq_activated : 1,
online : 1; #ifdef CONFIG_HIGH_RES_TIMERS unsignedint nr_events; unsignedshort nr_retries; unsignedshort nr_hangs; unsignedint max_hang_time; #endif #ifdef CONFIG_PREEMPT_RT
spinlock_t softirq_expiry_lock;
atomic_t timer_waiters; #endif
ktime_t expires_next; struct hrtimer *next_timer;
ktime_t softirq_expires_next; struct hrtimer *softirq_next_timer; struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];
call_single_data_t csd;
} ____cacheline_aligned;
#endif
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