[linux-2.6-block.git] / kernel / time / timer_list.c

/*
 * kernel/time/timer_list.c
 *
 * List pending timers
 *
 * Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/proc_fs.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>

#include <asm/uaccess.h>

#include "tick-internal.h"

struct timer_list_iter {
	int cpu;
	bool second_pass;
	u64 now;
};

typedef void (*print_fn_t)(struct seq_file *m, unsigned int *classes);

DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);

/*
 * This allows printing both to /proc/timer_list and
 * to the console (on SysRq-Q):
 */
__printf(2, 3)
static void SEQ_printf(struct seq_file *m, const char *fmt, ...)
{
	va_list args;

	va_start(args, fmt);

	if (m)
		seq_vprintf(m, fmt, args);
	else
		vprintk(fmt, args);

	va_end(args);
}

static void print_name_offset(struct seq_file *m, void *sym)
{
	char symname[KSYM_NAME_LEN];

	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
		SEQ_printf(m, "<%pK>", sym);
	else
		SEQ_printf(m, "%s", symname);
}

static void
print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer,
	    int idx, u64 now)
{
#ifdef CONFIG_TIMER_STATS
	char tmp[TASK_COMM_LEN + 1];
#endif
	SEQ_printf(m, " #%d: ", idx);
	print_name_offset(m, taddr);
	SEQ_printf(m, ", ");
	print_name_offset(m, timer->function);
	SEQ_printf(m, ", S:%02lx", timer->state);
#ifdef CONFIG_TIMER_STATS
	SEQ_printf(m, ", ");
	print_name_offset(m, timer->start_site);
	memcpy(tmp, timer->start_comm, TASK_COMM_LEN);
	tmp[TASK_COMM_LEN] = 0;
	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
#endif
	SEQ_printf(m, "\n");
	SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
		(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
		(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
		(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
		(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
}

static void
print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base,
		    u64 now)
{
	struct hrtimer *timer, tmp;
	unsigned long next = 0, i;
	struct timerqueue_node *curr;
	unsigned long flags;

next_one:
	i = 0;
	raw_spin_lock_irqsave(&base->cpu_base->lock, flags);

	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 = timerqueue_iterate_next(curr);
		i++;
	}

	if (curr) {

		timer = container_of(curr, struct hrtimer, node);
		tmp = *timer;
		raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);

		print_timer(m, timer, &tmp, i, now);
		next++;
		goto next_one;
	}
	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
}

static void
print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
{
	SEQ_printf(m, "  .base:       %pK\n", base);
	SEQ_printf(m, "  .index:      %d\n", base->index);

	SEQ_printf(m, "  .resolution: %u nsecs\n", (unsigned) hrtimer_resolution);

	SEQ_printf(m,   "  .get_time:   ");
	print_name_offset(m, base->get_time);
	SEQ_printf(m,   "\n");
#ifdef CONFIG_HIGH_RES_TIMERS
	SEQ_printf(m, "  .offset:     %Lu nsecs\n",
		   (unsigned long long) ktime_to_ns(base->offset));
#endif
	SEQ_printf(m,   "active timers:\n");
	print_active_timers(m, base, now);
}

static void print_cpu(struct seq_file *m, int cpu, u64 now)
{
	struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
	int i;

	SEQ_printf(m, "cpu: %d\n", cpu);
	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
		SEQ_printf(m, " clock %d:\n", i);
		print_base(m, cpu_base->clock_base + i, now);
	}
#define P(x) \
	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
		   (unsigned long long)(cpu_base->x))
#define P_ns(x) \
	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
		   (unsigned long long)(ktime_to_ns(cpu_base->x)))

#ifdef CONFIG_HIGH_RES_TIMERS
	P_ns(expires_next);
	P(hres_active);
	P(nr_events);
	P(nr_retries);
	P(nr_hangs);
	P(max_hang_time);
#endif
#undef P
#undef P_ns

#ifdef CONFIG_TICK_ONESHOT
# define P(x) \
	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
		   (unsigned long long)(ts->x))
# define P_ns(x) \
	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
		   (unsigned long long)(ktime_to_ns(ts->x)))
	{
		struct tick_sched *ts = tick_get_tick_sched(cpu);
		P(nohz_mode);
		P_ns(last_tick);
		P(tick_stopped);
		P(idle_jiffies);
		P(idle_calls);
		P(idle_sleeps);
		P_ns(idle_entrytime);
		P_ns(idle_waketime);
		P_ns(idle_exittime);
		P_ns(idle_sleeptime);
		P_ns(iowait_sleeptime);
		P(last_jiffies);
		P(next_jiffies);
		P_ns(idle_expires);
		SEQ_printf(m, "jiffies: %Lu\n",
			   (unsigned long long)jiffies);
	}
#endif

#undef P
#undef P_ns
	SEQ_printf(m, "\n");
}

#ifdef CONFIG_GENERIC_CLOCKEVENTS
static void
print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
{
	struct clock_event_device *dev = td->evtdev;

	SEQ_printf(m, "Tick Device: mode:     %d\n", td->mode);
	if (cpu < 0)
		SEQ_printf(m, "Broadcast device\n");
	else
		SEQ_printf(m, "Per CPU device: %d\n", cpu);

	SEQ_printf(m, "Clock Event Device: ");
	if (!dev) {
		SEQ_printf(m, "<NULL>\n");
		return;
	}
	SEQ_printf(m, "%s\n", dev->name);
	SEQ_printf(m, " max_delta_ns:   %llu\n",
		   (unsigned long long) dev->max_delta_ns);
	SEQ_printf(m, " min_delta_ns:   %llu\n",
		   (unsigned long long) dev->min_delta_ns);
	SEQ_printf(m, " mult:           %u\n", dev->mult);
	SEQ_printf(m, " shift:          %u\n", dev->shift);
	SEQ_printf(m, " mode:           %d\n", dev->mode);
	SEQ_printf(m, " next_event:     %Ld nsecs\n",
		   (unsigned long long) ktime_to_ns(dev->next_event));

	SEQ_printf(m, " set_next_event: ");
	print_name_offset(m, dev->set_next_event);
	SEQ_printf(m, "\n");

	if (dev->set_mode) {
		SEQ_printf(m, " set_mode:       ");
		print_name_offset(m, dev->set_mode);
		SEQ_printf(m, "\n");
	} else {
		if (dev->set_state_shutdown) {
			SEQ_printf(m, " shutdown: ");
			print_name_offset(m, dev->set_state_shutdown);
			SEQ_printf(m, "\n");
		}

		if (dev->set_state_periodic) {
			SEQ_printf(m, " periodic: ");
			print_name_offset(m, dev->set_state_periodic);
			SEQ_printf(m, "\n");
		}

		if (dev->set_state_oneshot) {
			SEQ_printf(m, " oneshot:  ");
			print_name_offset(m, dev->set_state_oneshot);
			SEQ_printf(m, "\n");
		}

		if (dev->tick_resume) {
			SEQ_printf(m, " resume:   ");
			print_name_offset(m, dev->tick_resume);
			SEQ_printf(m, "\n");
		}
	}

	SEQ_printf(m, " event_handler:  ");
	print_name_offset(m, dev->event_handler);
	SEQ_printf(m, "\n");
	SEQ_printf(m, " retries:        %lu\n", dev->retries);
	SEQ_printf(m, "\n");
}

static void timer_list_show_tickdevices_header(struct seq_file *m)
{
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
	print_tickdevice(m, tick_get_broadcast_device(), -1);
	SEQ_printf(m, "tick_broadcast_mask: %08lx\n",
		   cpumask_bits(tick_get_broadcast_mask())[0]);
#ifdef CONFIG_TICK_ONESHOT
	SEQ_printf(m, "tick_broadcast_oneshot_mask: %08lx\n",
		   cpumask_bits(tick_get_broadcast_oneshot_mask())[0]);
#endif
	SEQ_printf(m, "\n");
#endif
}
#endif

static inline void timer_list_header(struct seq_file *m, u64 now)
{
	SEQ_printf(m, "Timer List Version: v0.7\n");
	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
	SEQ_printf(m, "\n");
}

static int timer_list_show(struct seq_file *m, void *v)
{
	struct timer_list_iter *iter = v;

	if (iter->cpu == -1 && !iter->second_pass)
		timer_list_header(m, iter->now);
	else if (!iter->second_pass)
		print_cpu(m, iter->cpu, iter->now);
#ifdef CONFIG_GENERIC_CLOCKEVENTS
	else if (iter->cpu == -1 && iter->second_pass)
		timer_list_show_tickdevices_header(m);
	else
		print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
#endif
	return 0;
}

void sysrq_timer_list_show(void)
{
	u64 now = ktime_to_ns(ktime_get());
	int cpu;

	timer_list_header(NULL, now);

	for_each_online_cpu(cpu)
		print_cpu(NULL, cpu, now);

#ifdef CONFIG_GENERIC_CLOCKEVENTS
	timer_list_show_tickdevices_header(NULL);
	for_each_online_cpu(cpu)
		print_tickdevice(NULL, tick_get_device(cpu), cpu);
#endif
	return;
}

static void *move_iter(struct timer_list_iter *iter, loff_t offset)
{
	for (; offset; offset--) {
		iter->cpu = cpumask_next(iter->cpu, cpu_online_mask);
		if (iter->cpu >= nr_cpu_ids) {
#ifdef CONFIG_GENERIC_CLOCKEVENTS
			if (!iter->second_pass) {
				iter->cpu = -1;
				iter->second_pass = true;
			} else
				return NULL;
#else
			return NULL;
#endif
		}
	}
	return iter;
}

static void *timer_list_start(struct seq_file *file, loff_t *offset)
{
	struct timer_list_iter *iter = file->private;

	if (!*offset)
		iter->now = ktime_to_ns(ktime_get());
	iter->cpu = -1;
	iter->second_pass = false;
	return move_iter(iter, *offset);
}

static void *timer_list_next(struct seq_file *file, void *v, loff_t *offset)
{
	struct timer_list_iter *iter = file->private;
	++*offset;
	return move_iter(iter, 1);
}

static void timer_list_stop(struct seq_file *seq, void *v)
{
}

static const struct seq_operations timer_list_sops = {
	.start = timer_list_start,
	.next = timer_list_next,
	.stop = timer_list_stop,
	.show = timer_list_show,
};

static int timer_list_open(struct inode *inode, struct file *filp)
{
	return seq_open_private(filp, &timer_list_sops,
			sizeof(struct timer_list_iter));
}

static const struct file_operations timer_list_fops = {
	.open		= timer_list_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_private,
};

static int __init init_timer_list_procfs(void)
{
	struct proc_dir_entry *pe;

	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
	if (!pe)
		return -ENOMEM;
	return 0;
}
__initcall(init_timer_list_procfs);
Commit	Line	Data
289f480a IM	1	/*
	2	* kernel/time/timer_list.c
	3	*
	4	* List pending timers
	5	*
	6	* Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/proc_fs.h>
	14	#include <linux/module.h>
	15	#include <linux/spinlock.h>
	16	#include <linux/sched.h>
	17	#include <linux/seq_file.h>
	18	#include <linux/kallsyms.h>
289f480a IM	19
	20	#include <asm/uaccess.h>
	21
c1797baf	22	#include "tick-internal.h"
b3956a89 NZ	23
	24	struct timer_list_iter {
	25	int cpu;
	26	bool second_pass;
	27	u64 now;
	28	};
	29
289f480a IM	30	typedef void (print_fn_t)(struct seq_file m, unsigned int *classes);
	31
	32	DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);
	33
	34	/*
	35	* This allows printing both to /proc/timer_list and
	36	* to the console (on SysRq-Q):
	37	*/
7de4e744 JP	38	__printf(2, 3)
	39	static void SEQ_printf(struct seq_file m, const char fmt, ...)
	40	{
	41	va_list args;
	42
	43	va_start(args, fmt);
	44
	45	if (m)
	46	seq_vprintf(m, fmt, args);
	47	else
	48	vprintk(fmt, args);
	49
	50	va_end(args);
	51	}
289f480a IM	52
	53	static void print_name_offset(struct seq_file m, void sym)
	54	{
9281acea	55	char symname[KSYM_NAME_LEN];
289f480a	56
9d65cb4a	57	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
f5903085	58	SEQ_printf(m, "<%pK>", sym);
9d65cb4a AD	59	else
9d65cb4a AD	60	SEQ_printf(m, "%s", symname);
289f480a IM	61	}
	62
	63	static void
e67ef25a TG	64	print_timer(struct seq_file m, struct hrtimer taddr, struct hrtimer *timer,
e67ef25a TG	65	int idx, u64 now)
289f480a IM	66	{
	67	#ifdef CONFIG_TIMER_STATS
	68	char tmp[TASK_COMM_LEN + 1];
	69	#endif
	70	SEQ_printf(m, " #%d: ", idx);
e67ef25a	71	print_name_offset(m, taddr);
289f480a IM	72	SEQ_printf(m, ", ");
	73	print_name_offset(m, timer->function);
	74	SEQ_printf(m, ", S:%02lx", timer->state);
	75	#ifdef CONFIG_TIMER_STATS
	76	SEQ_printf(m, ", ");
	77	print_name_offset(m, timer->start_site);
	78	memcpy(tmp, timer->start_comm, TASK_COMM_LEN);
	79	tmp[TASK_COMM_LEN] = 0;
	80	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
	81	#endif
	82	SEQ_printf(m, "\n");
704af52b AV	83	SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
704af52b AV	84	(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
cc584b21	85	(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
704af52b	86	(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
cc584b21	87	(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
289f480a IM	88	}
	89
	90	static void
	91	print_active_timers(struct seq_file m, struct hrtimer_clock_base base,
	92	u64 now)
	93	{
	94	struct hrtimer *timer, tmp;
	95	unsigned long next = 0, i;
998adc3d	96	struct timerqueue_node *curr;
289f480a IM	97	unsigned long flags;
	98
	99	next_one:
	100	i = 0;
ecb49d1a	101	raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
289f480a	102
998adc3d	103	curr = timerqueue_getnext(&base->active);
289f480a IM	104	/*
	105	* Crude but we have to do this O(N*N) thing, because
	106	* we have to unlock the base when printing:
	107	*/
	108	while (curr && i < next) {
998adc3d	109	curr = timerqueue_iterate_next(curr);
289f480a IM	110	i++;
	111	}
	112
	113	if (curr) {
	114
998adc3d	115	timer = container_of(curr, struct hrtimer, node);
289f480a	116	tmp = *timer;
ecb49d1a	117	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a	118
e67ef25a	119	print_timer(m, timer, &tmp, i, now);
289f480a IM	120	next++;
	121	goto next_one;
	122	}
ecb49d1a	123	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a IM	124	}
	125
	126	static void
	127	print_base(struct seq_file m, struct hrtimer_clock_base base, u64 now)
	128	{
f5903085	129	SEQ_printf(m, " .base: %pK\n", base);
398ca17f TG	130	SEQ_printf(m, " .index: %d\n", base->index);
	131
	132	SEQ_printf(m, " .resolution: %u nsecs\n", (unsigned) hrtimer_resolution);
	133
289f480a IM	134	SEQ_printf(m, " .get_time: ");
	135	print_name_offset(m, base->get_time);
	136	SEQ_printf(m, "\n");
	137	#ifdef CONFIG_HIGH_RES_TIMERS
9b04bd27 DM	138	SEQ_printf(m, " .offset: %Lu nsecs\n",
9b04bd27 DM	139	(unsigned long long) ktime_to_ns(base->offset));
289f480a IM	140	#endif
	141	SEQ_printf(m, "active timers:\n");
	142	print_active_timers(m, base, now);
	143	}
	144
	145	static void print_cpu(struct seq_file *m, int cpu, u64 now)
	146	{
	147	struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
	148	int i;
	149
129f1d2c	150	SEQ_printf(m, "cpu: %d\n", cpu);
289f480a IM	151	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
	152	SEQ_printf(m, " clock %d:\n", i);
	153	print_base(m, cpu_base->clock_base + i, now);
	154	}
	155	#define P(x) \
9b04bd27 DM	156	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	157	(unsigned long long)(cpu_base->x))
289f480a	158	#define P_ns(x) \
9b04bd27 DM	159	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	160	(unsigned long long)(ktime_to_ns(cpu_base->x)))
289f480a IM	161
	162	#ifdef CONFIG_HIGH_RES_TIMERS
	163	P_ns(expires_next);
	164	P(hres_active);
	165	P(nr_events);
41d2e494 TG	166	P(nr_retries);
41d2e494 TG	167	P(nr_hangs);
a6ffebce	168	P(max_hang_time);
289f480a IM	169	#endif
	170	#undef P
	171	#undef P_ns
	172
	173	#ifdef CONFIG_TICK_ONESHOT
	174	# define P(x) \
9b04bd27 DM	175	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	176	(unsigned long long)(ts->x))
289f480a	177	# define P_ns(x) \
9b04bd27 DM	178	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	179	(unsigned long long)(ktime_to_ns(ts->x)))
289f480a IM	180	{
	181	struct tick_sched *ts = tick_get_tick_sched(cpu);
	182	P(nohz_mode);
f5d411c9	183	P_ns(last_tick);
289f480a IM	184	P(tick_stopped);
	185	P(idle_jiffies);
	186	P(idle_calls);
	187	P(idle_sleeps);
	188	P_ns(idle_entrytime);
5df7fa1c TG	189	P_ns(idle_waketime);
5df7fa1c TG	190	P_ns(idle_exittime);
289f480a	191	P_ns(idle_sleeptime);
0224cf4c	192	P_ns(iowait_sleeptime);
289f480a IM	193	P(last_jiffies);
	194	P(next_jiffies);
	195	P_ns(idle_expires);
9b04bd27 DM	196	SEQ_printf(m, "jiffies: %Lu\n",
9b04bd27 DM	197	(unsigned long long)jiffies);
289f480a IM	198	}
	199	#endif
	200
	201	#undef P
	202	#undef P_ns
60cf7ea8	203	SEQ_printf(m, "\n");
289f480a IM	204	}
	205
	206	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	207	static void
c5b77a3d	208	print_tickdevice(struct seq_file m, struct tick_device td, int cpu)
289f480a IM	209	{
	210	struct clock_event_device *dev = td->evtdev;
	211
129f1d2c	212	SEQ_printf(m, "Tick Device: mode: %d\n", td->mode);
c5b77a3d TG	213	if (cpu < 0)
	214	SEQ_printf(m, "Broadcast device\n");
	215	else
	216	SEQ_printf(m, "Per CPU device: %d\n", cpu);
289f480a IM	217
	218	SEQ_printf(m, "Clock Event Device: ");
	219	if (!dev) {
	220	SEQ_printf(m, "<NULL>\n");
	221	return;
	222	}
	223	SEQ_printf(m, "%s\n", dev->name);
97813f2f JH	224	SEQ_printf(m, " max_delta_ns: %llu\n",
	225	(unsigned long long) dev->max_delta_ns);
	226	SEQ_printf(m, " min_delta_ns: %llu\n",
	227	(unsigned long long) dev->min_delta_ns);
23af368e TG	228	SEQ_printf(m, " mult: %u\n", dev->mult);
23af368e TG	229	SEQ_printf(m, " shift: %u\n", dev->shift);
289f480a IM	230	SEQ_printf(m, " mode: %d\n", dev->mode);
	231	SEQ_printf(m, " next_event: %Ld nsecs\n",
	232	(unsigned long long) ktime_to_ns(dev->next_event));
	233
	234	SEQ_printf(m, " set_next_event: ");
	235	print_name_offset(m, dev->set_next_event);
	236	SEQ_printf(m, "\n");
	237
bd624d75 VK	238	if (dev->set_mode) {
	239	SEQ_printf(m, " set_mode: ");
	240	print_name_offset(m, dev->set_mode);
	241	SEQ_printf(m, "\n");
	242	} else {
77e32c89	243	if (dev->set_state_shutdown) {
bd624d75	244	SEQ_printf(m, " shutdown: ");
77e32c89	245	print_name_offset(m, dev->set_state_shutdown);
bd624d75 VK	246	SEQ_printf(m, "\n");
	247	}
	248
77e32c89	249	if (dev->set_state_periodic) {
bd624d75	250	SEQ_printf(m, " periodic: ");
77e32c89	251	print_name_offset(m, dev->set_state_periodic);
bd624d75 VK	252	SEQ_printf(m, "\n");
	253	}
	254
77e32c89	255	if (dev->set_state_oneshot) {
bd624d75	256	SEQ_printf(m, " oneshot: ");
77e32c89	257	print_name_offset(m, dev->set_state_oneshot);
bd624d75 VK	258	SEQ_printf(m, "\n");
	259	}
	260
554ef387	261	if (dev->tick_resume) {
bd624d75	262	SEQ_printf(m, " resume: ");
554ef387	263	print_name_offset(m, dev->tick_resume);
bd624d75 VK	264	SEQ_printf(m, "\n");
	265	}
	266	}
289f480a IM	267
	268	SEQ_printf(m, " event_handler: ");
	269	print_name_offset(m, dev->event_handler);
	270	SEQ_printf(m, "\n");
80a05b9f	271	SEQ_printf(m, " retries: %lu\n", dev->retries);
60cf7ea8	272	SEQ_printf(m, "\n");
289f480a IM	273	}
289f480a IM	274
60cf7ea8	275	static void timer_list_show_tickdevices_header(struct seq_file *m)
289f480a	276	{
289f480a	277	#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
c5b77a3d	278	print_tickdevice(m, tick_get_broadcast_device(), -1);
289f480a	279	SEQ_printf(m, "tick_broadcast_mask: %08lx\n",
62ac1279	280	cpumask_bits(tick_get_broadcast_mask())[0]);
289f480a IM	281	#ifdef CONFIG_TICK_ONESHOT
289f480a IM	282	SEQ_printf(m, "tick_broadcast_oneshot_mask: %08lx\n",
62ac1279	283	cpumask_bits(tick_get_broadcast_oneshot_mask())[0]);
289f480a IM	284	#endif
	285	SEQ_printf(m, "\n");
	286	#endif
289f480a	287	}
289f480a IM	288	#endif
289f480a IM	289
b3956a89	290	static inline void timer_list_header(struct seq_file *m, u64 now)
289f480a	291	{
f5d411c9	292	SEQ_printf(m, "Timer List Version: v0.7\n");
289f480a IM	293	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
289f480a IM	294	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
60cf7ea8	295	SEQ_printf(m, "\n");
b3956a89 NZ	296	}
	297
	298	static int timer_list_show(struct seq_file m, void v)
	299	{
	300	struct timer_list_iter *iter = v;
b3956a89 NZ	301
b3956a89 NZ	302	if (iter->cpu == -1 && !iter->second_pass)
84a78a65	303	timer_list_header(m, iter->now);
b3956a89 NZ	304	else if (!iter->second_pass)
	305	print_cpu(m, iter->cpu, iter->now);
	306	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	307	else if (iter->cpu == -1 && iter->second_pass)
	308	timer_list_show_tickdevices_header(m);
	309	else
	310	print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
	311	#endif
	312	return 0;
	313	}
	314
	315	void sysrq_timer_list_show(void)
	316	{
	317	u64 now = ktime_to_ns(ktime_get());
	318	int cpu;
	319
	320	timer_list_header(NULL, now);
289f480a IM	321
289f480a IM	322	for_each_online_cpu(cpu)
b3956a89	323	print_cpu(NULL, cpu, now);
289f480a	324
60cf7ea8	325	#ifdef CONFIG_GENERIC_CLOCKEVENTS
b3956a89	326	timer_list_show_tickdevices_header(NULL);
60cf7ea8	327	for_each_online_cpu(cpu)
b3956a89	328	print_tickdevice(NULL, tick_get_device(cpu), cpu);
60cf7ea8	329	#endif
b3956a89 NZ	330	return;
b3956a89 NZ	331	}
289f480a	332
84a78a65	333	static void move_iter(struct timer_list_iter iter, loff_t offset)
b3956a89	334	{
84a78a65 NZ	335	for (; offset; offset--) {
	336	iter->cpu = cpumask_next(iter->cpu, cpu_online_mask);
	337	if (iter->cpu >= nr_cpu_ids) {
b3956a89	338	#ifdef CONFIG_GENERIC_CLOCKEVENTS
84a78a65 NZ	339	if (!iter->second_pass) {
	340	iter->cpu = -1;
	341	iter->second_pass = true;
	342	} else
	343	return NULL;
b3956a89	344	#else
84a78a65	345	return NULL;
b3956a89	346	#endif
84a78a65	347	}
b3956a89 NZ	348	}
b3956a89 NZ	349	return iter;
289f480a IM	350	}
289f480a IM	351
84a78a65 NZ	352	static void timer_list_start(struct seq_file file, loff_t *offset)
	353	{
	354	struct timer_list_iter *iter = file->private;
	355
	356	if (!*offset)
	357	iter->now = ktime_to_ns(ktime_get());
	358	iter->cpu = -1;
	359	iter->second_pass = false;
	360	return move_iter(iter, *offset);
	361	}
	362
b3956a89	363	static void timer_list_next(struct seq_file file, void v, loff_t offset)
289f480a	364	{
b3956a89	365	struct timer_list_iter *iter = file->private;
b3956a89	366	++*offset;
84a78a65	367	return move_iter(iter, 1);
289f480a IM	368	}
289f480a IM	369
b3956a89 NZ	370	static void timer_list_stop(struct seq_file seq, void v)
	371	{
	372	}
	373
	374	static const struct seq_operations timer_list_sops = {
	375	.start = timer_list_start,
	376	.next = timer_list_next,
	377	.stop = timer_list_stop,
	378	.show = timer_list_show,
	379	};
	380
289f480a IM	381	static int timer_list_open(struct inode inode, struct file filp)
289f480a IM	382	{
b3956a89 NZ	383	return seq_open_private(filp, &timer_list_sops,
b3956a89 NZ	384	sizeof(struct timer_list_iter));
289f480a IM	385	}
289f480a IM	386
828c0950	387	static const struct file_operations timer_list_fops = {
289f480a IM	388	.open = timer_list_open,
	389	.read = seq_read,
	390	.llseek = seq_lseek,
b3956a89	391	.release = seq_release_private,
289f480a IM	392	};
	393
	394	static int __init init_timer_list_procfs(void)
	395	{
	396	struct proc_dir_entry *pe;
	397
de809347	398	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
289f480a IM	399	if (!pe)
289f480a IM	400	return -ENOMEM;
289f480a IM	401	return 0;
	402	}
	403	__initcall(init_timer_list_procfs);