[linux-block.git] / kernel / sched_debug.c

/*
 * kernel/time/sched_debug.c
 *
 * Print the CFS rbtree
 *
 * Copyright(C) 2007, 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/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
#include <linux/utsname.h>

/*
 * This allows printing both to /proc/sched_debug and
 * to the console
 */
#define SEQ_printf(m, x...)			\
 do {						\
	if (m)					\
		seq_printf(m, x);		\
	else					\
		printk(x);			\
 } while (0)

/*
 * Ease the printing of nsec fields:
 */
static long long nsec_high(unsigned long long nsec)
{
	if ((long long)nsec < 0) {
		nsec = -nsec;
		do_div(nsec, 1000000);
		return -nsec;
	}
	do_div(nsec, 1000000);

	return nsec;
}

static unsigned long nsec_low(unsigned long long nsec)
{
	if ((long long)nsec < 0)
		nsec = -nsec;

	return do_div(nsec, 1000000);
}

#define SPLIT_NS(x) nsec_high(x), nsec_low(x)

static void
print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
{
	if (rq->curr == p)
		SEQ_printf(m, "R");
	else
		SEQ_printf(m, " ");

	SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
		p->comm, p->pid,
		SPLIT_NS(p->se.vruntime),
		(long long)(p->nvcsw + p->nivcsw),
		p->prio);
#ifdef CONFIG_SCHEDSTATS
	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
		SPLIT_NS(p->se.vruntime),
		SPLIT_NS(p->se.sum_exec_runtime),
		SPLIT_NS(p->se.sum_sleep_runtime));
#else
	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
		0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
#endif

#ifdef CONFIG_CGROUP_SCHED
	{
		char path[64];

		cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
		SEQ_printf(m, " %s", path);
	}
#endif
	SEQ_printf(m, "\n");
}

static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
{
	struct task_struct *g, *p;
	unsigned long flags;

	SEQ_printf(m,
	"\nrunnable tasks:\n"
	"            task   PID         tree-key  switches  prio"
	"     exec-runtime         sum-exec        sum-sleep\n"
	"------------------------------------------------------"
	"----------------------------------------------------\n");

	read_lock_irqsave(&tasklist_lock, flags);

	do_each_thread(g, p) {
		if (!p->se.on_rq || task_cpu(p) != rq_cpu)
			continue;

		print_task(m, rq, p);
	} while_each_thread(g, p);

	read_unlock_irqrestore(&tasklist_lock, flags);
}

void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
{
	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
		spread, rq0_min_vruntime, spread0;
	struct rq *rq = &per_cpu(runqueues, cpu);
	struct sched_entity *last;
	unsigned long flags;

#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
	char path[128] = "";
	struct cgroup *cgroup = NULL;
	struct task_group *tg = cfs_rq->tg;

	if (tg)
		cgroup = tg->css.cgroup;

	if (cgroup)
		cgroup_path(cgroup, path, sizeof(path));

	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
#else
	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
#endif

	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
			SPLIT_NS(cfs_rq->exec_clock));

	spin_lock_irqsave(&rq->lock, flags);
	if (cfs_rq->rb_leftmost)
		MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
	last = __pick_last_entity(cfs_rq);
	if (last)
		max_vruntime = last->vruntime;
	min_vruntime = rq->cfs.min_vruntime;
	rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
	spin_unlock_irqrestore(&rq->lock, flags);
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "MIN_vruntime",
			SPLIT_NS(MIN_vruntime));
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "min_vruntime",
			SPLIT_NS(min_vruntime));
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "max_vruntime",
			SPLIT_NS(max_vruntime));
	spread = max_vruntime - MIN_vruntime;
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "spread",
			SPLIT_NS(spread));
	spread0 = min_vruntime - rq0_min_vruntime;
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "spread0",
			SPLIT_NS(spread0));
	SEQ_printf(m, "  .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
	SEQ_printf(m, "  .%-30s: %ld\n", "load", cfs_rq->load.weight);
#ifdef CONFIG_SCHEDSTATS
	SEQ_printf(m, "  .%-30s: %d\n", "bkl_count",
			rq->bkl_count);
#endif
	SEQ_printf(m, "  .%-30s: %ld\n", "nr_spread_over",
			cfs_rq->nr_spread_over);
}

void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
{
#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
	char path[128] = "";
	struct cgroup *cgroup = NULL;
	struct task_group *tg = rt_rq->tg;

	if (tg)
		cgroup = tg->css.cgroup;

	if (cgroup)
		cgroup_path(cgroup, path, sizeof(path));

	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
#else
	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
#endif


#define P(x) \
	SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
#define PN(x) \
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))

	P(rt_nr_running);
	P(rt_throttled);
	PN(rt_time);
	PN(rt_runtime);

#undef PN
#undef P
}

static void print_cpu(struct seq_file *m, int cpu)
{
	struct rq *rq = &per_cpu(runqueues, cpu);

#ifdef CONFIG_X86
	{
		unsigned int freq = cpu_khz ? : 1;

		SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
			   cpu, freq / 1000, (freq % 1000));
	}
#else
	SEQ_printf(m, "\ncpu#%d\n", cpu);
#endif

#define P(x) \
	SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rq->x))
#define PN(x) \
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))

	P(nr_running);
	SEQ_printf(m, "  .%-30s: %lu\n", "load",
		   rq->load.weight);
	P(nr_switches);
	P(nr_load_updates);
	P(nr_uninterruptible);
	SEQ_printf(m, "  .%-30s: %lu\n", "jiffies", jiffies);
	PN(next_balance);
	P(curr->pid);
	PN(clock);
	P(cpu_load[0]);
	P(cpu_load[1]);
	P(cpu_load[2]);
	P(cpu_load[3]);
	P(cpu_load[4]);
#undef P
#undef PN

	print_cfs_stats(m, cpu);
	print_rt_stats(m, cpu);

	print_rq(m, rq, cpu);
}

static int sched_debug_show(struct seq_file *m, void *v)
{
	u64 now = ktime_to_ns(ktime_get());
	int cpu;

	SEQ_printf(m, "Sched Debug Version: v0.07, %s %.*s\n",
		init_utsname()->release,
		(int)strcspn(init_utsname()->version, " "),
		init_utsname()->version);

	SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));

#define P(x) \
	SEQ_printf(m, "  .%-40s: %Ld\n", #x, (long long)(x))
#define PN(x) \
	SEQ_printf(m, "  .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
	PN(sysctl_sched_latency);
	PN(sysctl_sched_min_granularity);
	PN(sysctl_sched_wakeup_granularity);
	PN(sysctl_sched_child_runs_first);
	P(sysctl_sched_features);
#undef PN
#undef P

	for_each_online_cpu(cpu)
		print_cpu(m, cpu);

	SEQ_printf(m, "\n");

	return 0;
}

static void sysrq_sched_debug_show(void)
{
	sched_debug_show(NULL, NULL);
}

static int sched_debug_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, sched_debug_show, NULL);
}

static const struct file_operations sched_debug_fops = {
	.open		= sched_debug_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

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

	pe = proc_create("sched_debug", 0644, NULL, &sched_debug_fops);
	if (!pe)
		return -ENOMEM;
	return 0;
}

__initcall(init_sched_debug_procfs);

void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
{
	unsigned long nr_switches;
	unsigned long flags;
	int num_threads = 1;

	rcu_read_lock();
	if (lock_task_sighand(p, &flags)) {
		num_threads = atomic_read(&p->signal->count);
		unlock_task_sighand(p, &flags);
	}
	rcu_read_unlock();

	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
	SEQ_printf(m,
		"---------------------------------------------------------\n");
#define __P(F) \
	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
#define P(F) \
	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
#define __PN(F) \
	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
#define PN(F) \
	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))

	PN(se.exec_start);
	PN(se.vruntime);
	PN(se.sum_exec_runtime);
	PN(se.avg_overlap);

	nr_switches = p->nvcsw + p->nivcsw;

#ifdef CONFIG_SCHEDSTATS
	PN(se.wait_start);
	PN(se.sleep_start);
	PN(se.block_start);
	PN(se.sleep_max);
	PN(se.block_max);
	PN(se.exec_max);
	PN(se.slice_max);
	PN(se.wait_max);
	PN(se.wait_sum);
	P(se.wait_count);
	P(sched_info.bkl_count);
	P(se.nr_migrations);
	P(se.nr_migrations_cold);
	P(se.nr_failed_migrations_affine);
	P(se.nr_failed_migrations_running);
	P(se.nr_failed_migrations_hot);
	P(se.nr_forced_migrations);
	P(se.nr_forced2_migrations);
	P(se.nr_wakeups);
	P(se.nr_wakeups_sync);
	P(se.nr_wakeups_migrate);
	P(se.nr_wakeups_local);
	P(se.nr_wakeups_remote);
	P(se.nr_wakeups_affine);
	P(se.nr_wakeups_affine_attempts);
	P(se.nr_wakeups_passive);
	P(se.nr_wakeups_idle);

	{
		u64 avg_atom, avg_per_cpu;

		avg_atom = p->se.sum_exec_runtime;
		if (nr_switches)
			do_div(avg_atom, nr_switches);
		else
			avg_atom = -1LL;

		avg_per_cpu = p->se.sum_exec_runtime;
		if (p->se.nr_migrations) {
			avg_per_cpu = div64_u64(avg_per_cpu,
						p->se.nr_migrations);
		} else {
			avg_per_cpu = -1LL;
		}

		__PN(avg_atom);
		__PN(avg_per_cpu);
	}
#endif
	__P(nr_switches);
	SEQ_printf(m, "%-35s:%21Ld\n",
		   "nr_voluntary_switches", (long long)p->nvcsw);
	SEQ_printf(m, "%-35s:%21Ld\n",
		   "nr_involuntary_switches", (long long)p->nivcsw);

	P(se.load.weight);
	P(policy);
	P(prio);
#undef PN
#undef __PN
#undef P
#undef __P

	{
		u64 t0, t1;

		t0 = sched_clock();
		t1 = sched_clock();
		SEQ_printf(m, "%-35s:%21Ld\n",
			   "clock-delta", (long long)(t1-t0));
	}
}

void proc_sched_set_task(struct task_struct *p)
{
#ifdef CONFIG_SCHEDSTATS
	p->se.wait_max				= 0;
	p->se.wait_sum				= 0;
	p->se.wait_count			= 0;
	p->se.sleep_max				= 0;
	p->se.sum_sleep_runtime			= 0;
	p->se.block_max				= 0;
	p->se.exec_max				= 0;
	p->se.slice_max				= 0;
	p->se.nr_migrations			= 0;
	p->se.nr_migrations_cold		= 0;
	p->se.nr_failed_migrations_affine	= 0;
	p->se.nr_failed_migrations_running	= 0;
	p->se.nr_failed_migrations_hot		= 0;
	p->se.nr_forced_migrations		= 0;
	p->se.nr_forced2_migrations		= 0;
	p->se.nr_wakeups			= 0;
	p->se.nr_wakeups_sync			= 0;
	p->se.nr_wakeups_migrate		= 0;
	p->se.nr_wakeups_local			= 0;
	p->se.nr_wakeups_remote			= 0;
	p->se.nr_wakeups_affine			= 0;
	p->se.nr_wakeups_affine_attempts	= 0;
	p->se.nr_wakeups_passive		= 0;
	p->se.nr_wakeups_idle			= 0;
	p->sched_info.bkl_count			= 0;
#endif
	p->se.sum_exec_runtime			= 0;
	p->se.prev_sum_exec_runtime		= 0;
	p->nvcsw				= 0;
	p->nivcsw				= 0;
}
Commit	Line	Data
43ae34cb IM	1	/*
	2	* kernel/time/sched_debug.c
	3	*
	4	* Print the CFS rbtree
	5	*
	6	* Copyright(C) 2007, 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/sched.h>
	15	#include <linux/seq_file.h>
	16	#include <linux/kallsyms.h>
	17	#include <linux/utsname.h>
	18
	19	/*
	20	* This allows printing both to /proc/sched_debug and
	21	* to the console
	22	*/
	23	#define SEQ_printf(m, x...) \
	24	do { \
	25	if (m) \
	26	seq_printf(m, x); \
	27	else \
	28	printk(x); \
	29	} while (0)
	30
ef83a571 IM	31	/*
	32	* Ease the printing of nsec fields:
	33	*/
90b2628f	34	static long long nsec_high(unsigned long long nsec)
ef83a571	35	{
90b2628f	36	if ((long long)nsec < 0) {
ef83a571 IM	37	nsec = -nsec;
	38	do_div(nsec, 1000000);
	39	return -nsec;
	40	}
	41	do_div(nsec, 1000000);
	42
	43	return nsec;
	44	}
	45
90b2628f	46	static unsigned long nsec_low(unsigned long long nsec)
ef83a571	47	{
90b2628f	48	if ((long long)nsec < 0)
ef83a571 IM	49	nsec = -nsec;
	50
	51	return do_div(nsec, 1000000);
	52	}
	53
	54	#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
	55
43ae34cb	56	static void
a48da48b	57	print_task(struct seq_file m, struct rq rq, struct task_struct *p)
43ae34cb IM	58	{
	59	if (rq->curr == p)
	60	SEQ_printf(m, "R");
	61	else
	62	SEQ_printf(m, " ");
	63
ef83a571	64	SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
43ae34cb	65	p->comm, p->pid,
ef83a571	66	SPLIT_NS(p->se.vruntime),
43ae34cb	67	(long long)(p->nvcsw + p->nivcsw),
6f605d83	68	p->prio);
6cfb0d5d	69	#ifdef CONFIG_SCHEDSTATS
d19ca308	70	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
ef83a571 IM	71	SPLIT_NS(p->se.vruntime),
	72	SPLIT_NS(p->se.sum_exec_runtime),
	73	SPLIT_NS(p->se.sum_sleep_runtime));
6cfb0d5d	74	#else
d19ca308	75	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
ef83a571	76	0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
6cfb0d5d	77	#endif
d19ca308 PZ	78
	79	#ifdef CONFIG_CGROUP_SCHED
	80	{
	81	char path[64];
	82
	83	cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
	84	SEQ_printf(m, " %s", path);
	85	}
	86	#endif
	87	SEQ_printf(m, "\n");
43ae34cb IM	88	}
43ae34cb IM	89
a48da48b	90	static void print_rq(struct seq_file m, struct rq rq, int rq_cpu)
43ae34cb IM	91	{
43ae34cb IM	92	struct task_struct g, p;
ab63a633	93	unsigned long flags;
43ae34cb IM	94
	95	SEQ_printf(m,
	96	"\nrunnable tasks:\n"
c86da3a3 MG	97	" task PID tree-key switches prio"
c86da3a3 MG	98	" exec-runtime sum-exec sum-sleep\n"
1a75b94f	99	"------------------------------------------------------"
c86da3a3	100	"----------------------------------------------------\n");
43ae34cb	101
ab63a633	102	read_lock_irqsave(&tasklist_lock, flags);
43ae34cb IM	103
	104	do_each_thread(g, p) {
	105	if (!p->se.on_rq \|\| task_cpu(p) != rq_cpu)
	106	continue;
	107
a48da48b	108	print_task(m, rq, p);
43ae34cb IM	109	} while_each_thread(g, p);
43ae34cb IM	110
ab63a633	111	read_unlock_irqrestore(&tasklist_lock, flags);
43ae34cb IM	112	}
43ae34cb IM	113
5cef9eca	114	void print_cfs_rq(struct seq_file m, int cpu, struct cfs_rq cfs_rq)
43ae34cb	115	{
86d9560c IM	116	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
86d9560c IM	117	spread, rq0_min_vruntime, spread0;
67e12eac IM	118	struct rq *rq = &per_cpu(runqueues, cpu);
	119	struct sched_entity *last;
	120	unsigned long flags;
	121
ada18de2	122	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
d19ca308 PZ	123	char path[128] = "";
	124	struct cgroup *cgroup = NULL;
	125	struct task_group *tg = cfs_rq->tg;
	126
	127	if (tg)
	128	cgroup = tg->css.cgroup;
	129
	130	if (cgroup)
	131	cgroup_path(cgroup, path, sizeof(path));
	132
	133	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
ada18de2 PZ	134	#else
ada18de2 PZ	135	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
d19ca308	136	#endif
43ae34cb	137
ef83a571 IM	138	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
ef83a571 IM	139	SPLIT_NS(cfs_rq->exec_clock));
67e12eac IM	140
	141	spin_lock_irqsave(&rq->lock, flags);
	142	if (cfs_rq->rb_leftmost)
	143	MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
	144	last = __pick_last_entity(cfs_rq);
	145	if (last)
	146	max_vruntime = last->vruntime;
86d9560c IM	147	min_vruntime = rq->cfs.min_vruntime;
86d9560c IM	148	rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
67e12eac	149	spin_unlock_irqrestore(&rq->lock, flags);
ef83a571 IM	150	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
	151	SPLIT_NS(MIN_vruntime));
	152	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
	153	SPLIT_NS(min_vruntime));
	154	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
	155	SPLIT_NS(max_vruntime));
67e12eac	156	spread = max_vruntime - MIN_vruntime;
ef83a571 IM	157	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
ef83a571 IM	158	SPLIT_NS(spread));
86d9560c	159	spread0 = min_vruntime - rq0_min_vruntime;
ef83a571 IM	160	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
ef83a571 IM	161	SPLIT_NS(spread0));
545f3b18 SV	162	SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
545f3b18 SV	163	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
fdd71d13	164	#ifdef CONFIG_SCHEDSTATS
480b9434	165	SEQ_printf(m, " .%-30s: %d\n", "bkl_count",
2d72376b	166	rq->bkl_count);
fdd71d13	167	#endif
ddc97297 PZ	168	SEQ_printf(m, " .%-30s: %ld\n", "nr_spread_over",
ddc97297 PZ	169	cfs_rq->nr_spread_over);
43ae34cb IM	170	}
43ae34cb IM	171
ada18de2 PZ	172	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
	173	{
	174	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
	175	char path[128] = "";
	176	struct cgroup *cgroup = NULL;
	177	struct task_group *tg = rt_rq->tg;
	178
	179	if (tg)
	180	cgroup = tg->css.cgroup;
	181
	182	if (cgroup)
	183	cgroup_path(cgroup, path, sizeof(path));
	184
	185	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
	186	#else
	187	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
	188	#endif
	189
	190
	191	#define P(x) \
	192	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	193	#define PN(x) \
	194	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	195
	196	P(rt_nr_running);
	197	P(rt_throttled);
	198	PN(rt_time);
	199	PN(rt_runtime);
	200
	201	#undef PN
	202	#undef P
	203	}
	204
a48da48b	205	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb IM	206	{
	207	struct rq *rq = &per_cpu(runqueues, cpu);
	208
	209	#ifdef CONFIG_X86
	210	{
	211	unsigned int freq = cpu_khz ? : 1;
	212
	213	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	214	cpu, freq / 1000, (freq % 1000));
	215	}
	216	#else
	217	SEQ_printf(m, "\ncpu#%d\n", cpu);
	218	#endif
	219
	220	#define P(x) \
	221	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
ef83a571 IM	222	#define PN(x) \
ef83a571 IM	223	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	224
	225	P(nr_running);
	226	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	227	rq->load.weight);
43ae34cb IM	228	P(nr_switches);
	229	P(nr_load_updates);
	230	P(nr_uninterruptible);
	231	SEQ_printf(m, " .%-30s: %lu\n", "jiffies", jiffies);
ef83a571	232	PN(next_balance);
43ae34cb	233	P(curr->pid);
ef83a571	234	PN(clock);
43ae34cb IM	235	P(cpu_load[0]);
	236	P(cpu_load[1]);
	237	P(cpu_load[2]);
	238	P(cpu_load[3]);
	239	P(cpu_load[4]);
	240	#undef P
ef83a571	241	#undef PN
43ae34cb	242
5cef9eca	243	print_cfs_stats(m, cpu);
ada18de2	244	print_rt_stats(m, cpu);
43ae34cb	245
a48da48b	246	print_rq(m, rq, cpu);
43ae34cb IM	247	}
	248
	249	static int sched_debug_show(struct seq_file m, void v)
	250	{
	251	u64 now = ktime_to_ns(ktime_get());
	252	int cpu;
	253
f7b9329e	254	SEQ_printf(m, "Sched Debug Version: v0.07, %s %.*s\n",
43ae34cb IM	255	init_utsname()->release,
	256	(int)strcspn(init_utsname()->version, " "),
	257	init_utsname()->version);
	258
ef83a571	259	SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
43ae34cb	260
1aa4731e	261	#define P(x) \
d822cece	262	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	263	#define PN(x) \
d822cece	264	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1aa4731e	265	PN(sysctl_sched_latency);
b2be5e96	266	PN(sysctl_sched_min_granularity);
1aa4731e	267	PN(sysctl_sched_wakeup_granularity);
1aa4731e IM	268	PN(sysctl_sched_child_runs_first);
	269	P(sysctl_sched_features);
	270	#undef PN
	271	#undef P
	272
43ae34cb	273	for_each_online_cpu(cpu)
a48da48b	274	print_cpu(m, cpu);
43ae34cb IM	275
	276	SEQ_printf(m, "\n");
	277
	278	return 0;
	279	}
	280
f3373461	281	static void sysrq_sched_debug_show(void)
43ae34cb IM	282	{
	283	sched_debug_show(NULL, NULL);
	284	}
	285
	286	static int sched_debug_open(struct inode inode, struct file filp)
	287	{
	288	return single_open(filp, sched_debug_show, NULL);
	289	}
	290
0dbee3a6	291	static const struct file_operations sched_debug_fops = {
43ae34cb IM	292	.open = sched_debug_open,
	293	.read = seq_read,
	294	.llseek = seq_lseek,
5ea473a1	295	.release = single_release,
43ae34cb IM	296	};
	297
	298	static int __init init_sched_debug_procfs(void)
	299	{
	300	struct proc_dir_entry *pe;
	301
c33fff0a	302	pe = proc_create("sched_debug", 0644, NULL, &sched_debug_fops);
43ae34cb IM	303	if (!pe)
43ae34cb IM	304	return -ENOMEM;
43ae34cb IM	305	return 0;
	306	}
	307
	308	__initcall(init_sched_debug_procfs);
	309
	310	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	311	{
cc367732	312	unsigned long nr_switches;
43ae34cb IM	313	unsigned long flags;
	314	int num_threads = 1;
	315
	316	rcu_read_lock();
	317	if (lock_task_sighand(p, &flags)) {
	318	num_threads = atomic_read(&p->signal->count);
	319	unlock_task_sighand(p, &flags);
	320	}
	321	rcu_read_unlock();
	322
	323	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
2d92f227 IM	324	SEQ_printf(m,
2d92f227 IM	325	"---------------------------------------------------------\n");
cc367732 IM	326	#define __P(F) \
cc367732 IM	327	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	328	#define P(F) \
2d92f227	329	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	330	#define __PN(F) \
cc367732 IM	331	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	332	#define PN(F) \
2d92f227	333	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	334
ef83a571 IM	335	PN(se.exec_start);
	336	PN(se.vruntime);
	337	PN(se.sum_exec_runtime);
4ae7d5ce	338	PN(se.avg_overlap);
6cfb0d5d	339
cc367732 IM	340	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	341
6cfb0d5d	342	#ifdef CONFIG_SCHEDSTATS
ef83a571 IM	343	PN(se.wait_start);
	344	PN(se.sleep_start);
	345	PN(se.block_start);
	346	PN(se.sleep_max);
	347	PN(se.block_max);
	348	PN(se.exec_max);
	349	PN(se.slice_max);
	350	PN(se.wait_max);
6d082592 AV	351	PN(se.wait_sum);
6d082592 AV	352	P(se.wait_count);
2d72376b	353	P(sched_info.bkl_count);
cc367732 IM	354	P(se.nr_migrations);
	355	P(se.nr_migrations_cold);
	356	P(se.nr_failed_migrations_affine);
	357	P(se.nr_failed_migrations_running);
	358	P(se.nr_failed_migrations_hot);
	359	P(se.nr_forced_migrations);
	360	P(se.nr_forced2_migrations);
	361	P(se.nr_wakeups);
	362	P(se.nr_wakeups_sync);
	363	P(se.nr_wakeups_migrate);
	364	P(se.nr_wakeups_local);
	365	P(se.nr_wakeups_remote);
	366	P(se.nr_wakeups_affine);
	367	P(se.nr_wakeups_affine_attempts);
	368	P(se.nr_wakeups_passive);
	369	P(se.nr_wakeups_idle);
	370
	371	{
	372	u64 avg_atom, avg_per_cpu;
	373
	374	avg_atom = p->se.sum_exec_runtime;
	375	if (nr_switches)
	376	do_div(avg_atom, nr_switches);
	377	else
	378	avg_atom = -1LL;
	379
	380	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	381	if (p->se.nr_migrations) {
6f6d6a1a RZ	382	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	383	p->se.nr_migrations);
c1a89740	384	} else {
cc367732	385	avg_per_cpu = -1LL;
c1a89740	386	}
cc367732 IM	387
	388	__PN(avg_atom);
	389	__PN(avg_per_cpu);
	390	}
6cfb0d5d	391	#endif
cc367732	392	__P(nr_switches);
2d92f227	393	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	394	"nr_voluntary_switches", (long long)p->nvcsw);
	395	SEQ_printf(m, "%-35s:%21Ld\n",
	396	"nr_involuntary_switches", (long long)p->nivcsw);
	397
43ae34cb IM	398	P(se.load.weight);
	399	P(policy);
	400	P(prio);
ef83a571	401	#undef PN
cc367732 IM	402	#undef __PN
	403	#undef P
	404	#undef __P
43ae34cb IM	405
	406	{
	407	u64 t0, t1;
	408
	409	t0 = sched_clock();
	410	t1 = sched_clock();
2d92f227	411	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	412	"clock-delta", (long long)(t1-t0));
	413	}
	414	}
	415
	416	void proc_sched_set_task(struct task_struct *p)
	417	{
6cfb0d5d	418	#ifdef CONFIG_SCHEDSTATS
cc367732	419	p->se.wait_max = 0;
6d082592 AV	420	p->se.wait_sum = 0;
6d082592 AV	421	p->se.wait_count = 0;
cc367732 IM	422	p->se.sleep_max = 0;
	423	p->se.sum_sleep_runtime = 0;
	424	p->se.block_max = 0;
	425	p->se.exec_max = 0;
	426	p->se.slice_max = 0;
	427	p->se.nr_migrations = 0;
	428	p->se.nr_migrations_cold = 0;
	429	p->se.nr_failed_migrations_affine = 0;
	430	p->se.nr_failed_migrations_running = 0;
	431	p->se.nr_failed_migrations_hot = 0;
	432	p->se.nr_forced_migrations = 0;
	433	p->se.nr_forced2_migrations = 0;
	434	p->se.nr_wakeups = 0;
	435	p->se.nr_wakeups_sync = 0;
	436	p->se.nr_wakeups_migrate = 0;
	437	p->se.nr_wakeups_local = 0;
	438	p->se.nr_wakeups_remote = 0;
	439	p->se.nr_wakeups_affine = 0;
	440	p->se.nr_wakeups_affine_attempts = 0;
	441	p->se.nr_wakeups_passive = 0;
	442	p->se.nr_wakeups_idle = 0;
	443	p->sched_info.bkl_count = 0;
6cfb0d5d	444	#endif
cc367732 IM	445	p->se.sum_exec_runtime = 0;
	446	p->se.prev_sum_exec_runtime = 0;
	447	p->nvcsw = 0;
	448	p->nivcsw = 0;
43ae34cb	449	}