[mirror_ubuntu-zesty-kernel.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)

#ifdef CONFIG_FAIR_GROUP_SCHED
static void print_cfs_group_stats(struct seq_file *m, int cpu,
		struct task_group *tg)
{
	struct sched_entity *se = tg->se[cpu];
	if (!se)
		return;

#define P(F) \
	SEQ_printf(m, "  .%-30s: %lld\n", #F, (long long)F)
#define PN(F) \
	SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))

	PN(se->exec_start);
	PN(se->vruntime);
	PN(se->sum_exec_runtime);
#ifdef CONFIG_SCHEDSTATS
	PN(se->statistics.wait_start);
	PN(se->statistics.sleep_start);
	PN(se->statistics.block_start);
	PN(se->statistics.sleep_max);
	PN(se->statistics.block_max);
	PN(se->statistics.exec_max);
	PN(se->statistics.slice_max);
	PN(se->statistics.wait_max);
	PN(se->statistics.wait_sum);
	P(se->statistics.wait_count);
#endif
	P(se->load.weight);
#undef PN
#undef P
}
#endif

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.statistics.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];

		rcu_read_lock();
		cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
		rcu_read_unlock();
		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);
}

#if defined(CONFIG_CGROUP_SCHED) && \
	(defined(CONFIG_FAIR_GROUP_SCHED) || defined(CONFIG_RT_GROUP_SCHED))
static void task_group_path(struct task_group *tg, char *buf, int buflen)
{
	/* may be NULL if the underlying cgroup isn't fully-created yet */
	if (!tg->css.cgroup) {
		buf[0] = '\0';
		return;
	}
	cgroup_path(tg->css.cgroup, buf, buflen);
}
#endif

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 = cpu_rq(cpu);
	struct sched_entity *last;
	unsigned long flags;

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

	task_group_path(tg, 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));

	raw_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 = cfs_rq->min_vruntime;
	rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
	raw_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: %d\n", "nr_spread_over",
			cfs_rq->nr_spread_over);
	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_FAIR_GROUP_SCHED
#ifdef CONFIG_SMP
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "load_avg",
			SPLIT_NS(cfs_rq->load_avg));
	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "load_period",
			SPLIT_NS(cfs_rq->load_period));
	SEQ_printf(m, "  .%-30s: %ld\n", "load_contrib",
			cfs_rq->load_contribution);
	SEQ_printf(m, "  .%-30s: %d\n", "load_tg",
			atomic_read(&tg->load_weight));
#endif

	print_cfs_group_stats(m, cpu, cfs_rq->tg);
#endif
}

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 task_group *tg = rt_rq->tg;

	task_group_path(tg, 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
}

extern __read_mostly int sched_clock_running;

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

#ifdef CONFIG_SCHEDSTATS
#define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
#define P64(n) SEQ_printf(m, "  .%-30s: %Ld\n", #n, rq->n);

	P(yld_count);

	P(sched_switch);
	P(sched_count);
	P(sched_goidle);
#ifdef CONFIG_SMP
	P64(avg_idle);
#endif

	P(ttwu_count);
	P(ttwu_local);

	P(bkl_count);

#undef P
#endif
	print_cfs_stats(m, cpu);
	print_rt_stats(m, cpu);

	print_rq(m, rq, cpu);
}

static const char *sched_tunable_scaling_names[] = {
	"none",
	"logaritmic",
	"linear"
};

static int sched_debug_show(struct seq_file *m, void *v)
{
	u64 ktime, sched_clk, cpu_clk;
	unsigned long flags;
	int cpu;

	local_irq_save(flags);
	ktime = ktime_to_ns(ktime_get());
	sched_clk = sched_clock();
	cpu_clk = local_clock();
	local_irq_restore(flags);

	SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
		init_utsname()->release,
		(int)strcspn(init_utsname()->version, " "),
		init_utsname()->version);

#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(ktime);
	PN(sched_clk);
	PN(cpu_clk);
	P(jiffies);
#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
	P(sched_clock_stable);
#endif
#undef PN
#undef P

	SEQ_printf(m, "\n");
	SEQ_printf(m, "sysctl_sched\n");

#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);
	P(sysctl_sched_child_runs_first);
	P(sysctl_sched_features);
#undef PN
#undef P

	SEQ_printf(m, "  .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
		sysctl_sched_tunable_scaling,
		sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);

	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", 0444, 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;

	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
						get_nr_threads(p));
	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);

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

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

	{
		unsigned int this_cpu = raw_smp_processor_id();
		u64 t0, t1;

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

void proc_sched_set_task(struct task_struct *p)
{
#ifdef CONFIG_SCHEDSTATS
	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
#endif
}
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
ff9b48c3 BR	56	#ifdef CONFIG_FAIR_GROUP_SCHED
	57	static void print_cfs_group_stats(struct seq_file *m, int cpu,
	58	struct task_group *tg)
	59	{
	60	struct sched_entity *se = tg->se[cpu];
	61	if (!se)
	62	return;
	63
	64	#define P(F) \
	65	SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
	66	#define PN(F) \
	67	SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
	68
	69	PN(se->exec_start);
	70	PN(se->vruntime);
	71	PN(se->sum_exec_runtime);
	72	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	73	PN(se->statistics.wait_start);
	74	PN(se->statistics.sleep_start);
	75	PN(se->statistics.block_start);
	76	PN(se->statistics.sleep_max);
	77	PN(se->statistics.block_max);
	78	PN(se->statistics.exec_max);
	79	PN(se->statistics.slice_max);
	80	PN(se->statistics.wait_max);
	81	PN(se->statistics.wait_sum);
	82	P(se->statistics.wait_count);
ff9b48c3 BR	83	#endif
	84	P(se->load.weight);
	85	#undef PN
	86	#undef P
	87	}
	88	#endif
	89
43ae34cb	90	static void
a48da48b	91	print_task(struct seq_file m, struct rq rq, struct task_struct *p)
43ae34cb IM	92	{
	93	if (rq->curr == p)
	94	SEQ_printf(m, "R");
	95	else
	96	SEQ_printf(m, " ");
	97
ef83a571	98	SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
43ae34cb	99	p->comm, p->pid,
ef83a571	100	SPLIT_NS(p->se.vruntime),
43ae34cb	101	(long long)(p->nvcsw + p->nivcsw),
6f605d83	102	p->prio);
6cfb0d5d	103	#ifdef CONFIG_SCHEDSTATS
d19ca308	104	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
ef83a571 IM	105	SPLIT_NS(p->se.vruntime),
ef83a571 IM	106	SPLIT_NS(p->se.sum_exec_runtime),
41acab88	107	SPLIT_NS(p->se.statistics.sum_sleep_runtime));
6cfb0d5d	108	#else
d19ca308	109	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
ef83a571	110	0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
6cfb0d5d	111	#endif
d19ca308 PZ	112
	113	#ifdef CONFIG_CGROUP_SCHED
	114	{
	115	char path[64];
	116
b629317e	117	rcu_read_lock();
d19ca308	118	cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
b629317e	119	rcu_read_unlock();
d19ca308 PZ	120	SEQ_printf(m, " %s", path);
	121	}
	122	#endif
	123	SEQ_printf(m, "\n");
43ae34cb IM	124	}
43ae34cb IM	125
a48da48b	126	static void print_rq(struct seq_file m, struct rq rq, int rq_cpu)
43ae34cb IM	127	{
43ae34cb IM	128	struct task_struct g, p;
ab63a633	129	unsigned long flags;
43ae34cb IM	130
	131	SEQ_printf(m,
	132	"\nrunnable tasks:\n"
c86da3a3 MG	133	" task PID tree-key switches prio"
c86da3a3 MG	134	" exec-runtime sum-exec sum-sleep\n"
1a75b94f	135	"------------------------------------------------------"
c86da3a3	136	"----------------------------------------------------\n");
43ae34cb	137
ab63a633	138	read_lock_irqsave(&tasklist_lock, flags);
43ae34cb IM	139
	140	do_each_thread(g, p) {
	141	if (!p->se.on_rq \|\| task_cpu(p) != rq_cpu)
	142	continue;
	143
a48da48b	144	print_task(m, rq, p);
43ae34cb IM	145	} while_each_thread(g, p);
43ae34cb IM	146
ab63a633	147	read_unlock_irqrestore(&tasklist_lock, flags);
43ae34cb IM	148	}
43ae34cb IM	149
805194c3 LZ	150	#if defined(CONFIG_CGROUP_SCHED) && \
	151	(defined(CONFIG_FAIR_GROUP_SCHED) \|\| defined(CONFIG_RT_GROUP_SCHED))
	152	static void task_group_path(struct task_group tg, char buf, int buflen)
	153	{
	154	/* may be NULL if the underlying cgroup isn't fully-created yet */
	155	if (!tg->css.cgroup) {
	156	buf[0] = '\0';
	157	return;
	158	}
	159	cgroup_path(tg->css.cgroup, buf, buflen);
	160	}
	161	#endif
	162
5cef9eca	163	void print_cfs_rq(struct seq_file m, int cpu, struct cfs_rq cfs_rq)
43ae34cb	164	{
86d9560c IM	165	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
86d9560c IM	166	spread, rq0_min_vruntime, spread0;
348ec61e	167	struct rq *rq = cpu_rq(cpu);
67e12eac IM	168	struct sched_entity *last;
	169	unsigned long flags;
	170
ada18de2	171	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
805194c3	172	char path[128];
d19ca308 PZ	173	struct task_group *tg = cfs_rq->tg;
d19ca308 PZ	174
805194c3	175	task_group_path(tg, path, sizeof(path));
d19ca308 PZ	176
d19ca308 PZ	177	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
ada18de2 PZ	178	#else
ada18de2 PZ	179	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
d19ca308	180	#endif
ef83a571 IM	181	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
ef83a571 IM	182	SPLIT_NS(cfs_rq->exec_clock));
67e12eac	183
05fa785c	184	raw_spin_lock_irqsave(&rq->lock, flags);
67e12eac IM	185	if (cfs_rq->rb_leftmost)
	186	MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
	187	last = __pick_last_entity(cfs_rq);
	188	if (last)
	189	max_vruntime = last->vruntime;
5ac5c4d6	190	min_vruntime = cfs_rq->min_vruntime;
348ec61e	191	rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
05fa785c	192	raw_spin_unlock_irqrestore(&rq->lock, flags);
ef83a571 IM	193	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
	194	SPLIT_NS(MIN_vruntime));
	195	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
	196	SPLIT_NS(min_vruntime));
	197	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
	198	SPLIT_NS(max_vruntime));
67e12eac	199	spread = max_vruntime - MIN_vruntime;
ef83a571 IM	200	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
ef83a571 IM	201	SPLIT_NS(spread));
86d9560c	202	spread0 = min_vruntime - rq0_min_vruntime;
ef83a571 IM	203	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
ef83a571 IM	204	SPLIT_NS(spread0));
5ac5c4d6	205	SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
ddc97297	206	cfs_rq->nr_spread_over);
2069dd75 PZ	207	SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
2069dd75 PZ	208	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
c09595f6 PZ	209	#ifdef CONFIG_FAIR_GROUP_SCHED
c09595f6 PZ	210	#ifdef CONFIG_SMP
2069dd75 PZ	211	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
	212	SPLIT_NS(cfs_rq->load_avg));
	213	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
	214	SPLIT_NS(cfs_rq->load_period));
	215	SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
	216	cfs_rq->load_contribution);
	217	SEQ_printf(m, " .%-30s: %d\n", "load_tg",
	218	atomic_read(&tg->load_weight));
c09595f6	219	#endif
2069dd75	220
ff9b48c3	221	print_cfs_group_stats(m, cpu, cfs_rq->tg);
c09595f6	222	#endif
43ae34cb IM	223	}
43ae34cb IM	224
ada18de2 PZ	225	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
	226	{
	227	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
805194c3	228	char path[128];
ada18de2 PZ	229	struct task_group *tg = rt_rq->tg;
ada18de2 PZ	230
805194c3	231	task_group_path(tg, path, sizeof(path));
ada18de2 PZ	232
	233	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
	234	#else
	235	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
	236	#endif
	237
	238
	239	#define P(x) \
	240	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	241	#define PN(x) \
	242	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	243
	244	P(rt_nr_running);
	245	P(rt_throttled);
	246	PN(rt_time);
	247	PN(rt_runtime);
	248
	249	#undef PN
	250	#undef P
	251	}
	252
5bb6b1ea PZ	253	extern __read_mostly int sched_clock_running;
5bb6b1ea PZ	254
a48da48b	255	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb	256	{
348ec61e	257	struct rq *rq = cpu_rq(cpu);
43ae34cb IM	258
	259	#ifdef CONFIG_X86
	260	{
	261	unsigned int freq = cpu_khz ? : 1;
	262
	263	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	264	cpu, freq / 1000, (freq % 1000));
	265	}
	266	#else
	267	SEQ_printf(m, "\ncpu#%d\n", cpu);
	268	#endif
	269
	270	#define P(x) \
	271	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
ef83a571 IM	272	#define PN(x) \
ef83a571 IM	273	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	274
	275	P(nr_running);
	276	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	277	rq->load.weight);
43ae34cb IM	278	P(nr_switches);
	279	P(nr_load_updates);
	280	P(nr_uninterruptible);
ef83a571	281	PN(next_balance);
43ae34cb	282	P(curr->pid);
ef83a571	283	PN(clock);
43ae34cb IM	284	P(cpu_load[0]);
	285	P(cpu_load[1]);
	286	P(cpu_load[2]);
	287	P(cpu_load[3]);
	288	P(cpu_load[4]);
	289	#undef P
ef83a571	290	#undef PN
43ae34cb	291
5ac5c4d6 PZ	292	#ifdef CONFIG_SCHEDSTATS
5ac5c4d6 PZ	293	#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
1b9508f6	294	#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
5ac5c4d6	295
5ac5c4d6 PZ	296	P(yld_count);
	297
	298	P(sched_switch);
	299	P(sched_count);
	300	P(sched_goidle);
1b9508f6 MG	301	#ifdef CONFIG_SMP
	302	P64(avg_idle);
	303	#endif
5ac5c4d6 PZ	304
	305	P(ttwu_count);
	306	P(ttwu_local);
	307
	308	P(bkl_count);
	309
	310	#undef P
	311	#endif
5cef9eca	312	print_cfs_stats(m, cpu);
ada18de2	313	print_rt_stats(m, cpu);
43ae34cb	314
a48da48b	315	print_rq(m, rq, cpu);
43ae34cb IM	316	}
43ae34cb IM	317
1983a922 CE	318	static const char *sched_tunable_scaling_names[] = {
	319	"none",
	320	"logaritmic",
	321	"linear"
	322	};
	323
43ae34cb IM	324	static int sched_debug_show(struct seq_file m, void v)
43ae34cb IM	325	{
5bb6b1ea PZ	326	u64 ktime, sched_clk, cpu_clk;
5bb6b1ea PZ	327	unsigned long flags;
43ae34cb IM	328	int cpu;
43ae34cb IM	329
5bb6b1ea PZ	330	local_irq_save(flags);
	331	ktime = ktime_to_ns(ktime_get());
	332	sched_clk = sched_clock();
	333	cpu_clk = local_clock();
	334	local_irq_restore(flags);
	335
	336	SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
43ae34cb IM	337	init_utsname()->release,
	338	(int)strcspn(init_utsname()->version, " "),
	339	init_utsname()->version);
	340
5bb6b1ea PZ	341	#define P(x) \
	342	SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
	343	#define PN(x) \
	344	SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
	345	PN(ktime);
	346	PN(sched_clk);
	347	PN(cpu_clk);
	348	P(jiffies);
	349	#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
	350	P(sched_clock_stable);
	351	#endif
	352	#undef PN
	353	#undef P
	354
	355	SEQ_printf(m, "\n");
	356	SEQ_printf(m, "sysctl_sched\n");
43ae34cb	357
1aa4731e	358	#define P(x) \
d822cece	359	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	360	#define PN(x) \
d822cece	361	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1aa4731e	362	PN(sysctl_sched_latency);
b2be5e96	363	PN(sysctl_sched_min_granularity);
1aa4731e	364	PN(sysctl_sched_wakeup_granularity);
eebef746	365	P(sysctl_sched_child_runs_first);
1aa4731e IM	366	P(sysctl_sched_features);
	367	#undef PN
	368	#undef P
	369
1983a922 CE	370	SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
	371	sysctl_sched_tunable_scaling,
	372	sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
	373
43ae34cb	374	for_each_online_cpu(cpu)
a48da48b	375	print_cpu(m, cpu);
43ae34cb IM	376
	377	SEQ_printf(m, "\n");
	378
	379	return 0;
	380	}
	381
f3373461	382	static void sysrq_sched_debug_show(void)
43ae34cb IM	383	{
	384	sched_debug_show(NULL, NULL);
	385	}
	386
	387	static int sched_debug_open(struct inode inode, struct file filp)
	388	{
	389	return single_open(filp, sched_debug_show, NULL);
	390	}
	391
0dbee3a6	392	static const struct file_operations sched_debug_fops = {
43ae34cb IM	393	.open = sched_debug_open,
	394	.read = seq_read,
	395	.llseek = seq_lseek,
5ea473a1	396	.release = single_release,
43ae34cb IM	397	};
	398
	399	static int __init init_sched_debug_procfs(void)
	400	{
	401	struct proc_dir_entry *pe;
	402
a9cf4ddb	403	pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
43ae34cb IM	404	if (!pe)
43ae34cb IM	405	return -ENOMEM;
43ae34cb IM	406	return 0;
	407	}
	408
	409	__initcall(init_sched_debug_procfs);
	410
	411	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	412	{
cc367732	413	unsigned long nr_switches;
43ae34cb	414
5089a976 ON	415	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
5089a976 ON	416	get_nr_threads(p));
2d92f227 IM	417	SEQ_printf(m,
2d92f227 IM	418	"---------------------------------------------------------\n");
cc367732 IM	419	#define __P(F) \
cc367732 IM	420	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	421	#define P(F) \
2d92f227	422	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	423	#define __PN(F) \
cc367732 IM	424	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	425	#define PN(F) \
2d92f227	426	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	427
ef83a571 IM	428	PN(se.exec_start);
	429	PN(se.vruntime);
	430	PN(se.sum_exec_runtime);
6cfb0d5d	431
cc367732 IM	432	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	433
6cfb0d5d	434	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	435	PN(se.statistics.wait_start);
	436	PN(se.statistics.sleep_start);
	437	PN(se.statistics.block_start);
	438	PN(se.statistics.sleep_max);
	439	PN(se.statistics.block_max);
	440	PN(se.statistics.exec_max);
	441	PN(se.statistics.slice_max);
	442	PN(se.statistics.wait_max);
	443	PN(se.statistics.wait_sum);
	444	P(se.statistics.wait_count);
	445	PN(se.statistics.iowait_sum);
	446	P(se.statistics.iowait_count);
2d72376b	447	P(sched_info.bkl_count);
cc367732	448	P(se.nr_migrations);
41acab88 LDM	449	P(se.statistics.nr_migrations_cold);
	450	P(se.statistics.nr_failed_migrations_affine);
	451	P(se.statistics.nr_failed_migrations_running);
	452	P(se.statistics.nr_failed_migrations_hot);
	453	P(se.statistics.nr_forced_migrations);
	454	P(se.statistics.nr_wakeups);
	455	P(se.statistics.nr_wakeups_sync);
	456	P(se.statistics.nr_wakeups_migrate);
	457	P(se.statistics.nr_wakeups_local);
	458	P(se.statistics.nr_wakeups_remote);
	459	P(se.statistics.nr_wakeups_affine);
	460	P(se.statistics.nr_wakeups_affine_attempts);
	461	P(se.statistics.nr_wakeups_passive);
	462	P(se.statistics.nr_wakeups_idle);
cc367732 IM	463
	464	{
	465	u64 avg_atom, avg_per_cpu;
	466
	467	avg_atom = p->se.sum_exec_runtime;
	468	if (nr_switches)
	469	do_div(avg_atom, nr_switches);
	470	else
	471	avg_atom = -1LL;
	472
	473	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	474	if (p->se.nr_migrations) {
6f6d6a1a RZ	475	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	476	p->se.nr_migrations);
c1a89740	477	} else {
cc367732	478	avg_per_cpu = -1LL;
c1a89740	479	}
cc367732 IM	480
	481	__PN(avg_atom);
	482	__PN(avg_per_cpu);
	483	}
6cfb0d5d	484	#endif
cc367732	485	__P(nr_switches);
2d92f227	486	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	487	"nr_voluntary_switches", (long long)p->nvcsw);
	488	SEQ_printf(m, "%-35s:%21Ld\n",
	489	"nr_involuntary_switches", (long long)p->nivcsw);
	490
43ae34cb IM	491	P(se.load.weight);
	492	P(policy);
	493	P(prio);
ef83a571	494	#undef PN
cc367732 IM	495	#undef __PN
	496	#undef P
	497	#undef __P
43ae34cb IM	498
43ae34cb IM	499	{
29d7b90c	500	unsigned int this_cpu = raw_smp_processor_id();
43ae34cb IM	501	u64 t0, t1;
43ae34cb IM	502
29d7b90c IM	503	t0 = cpu_clock(this_cpu);
29d7b90c IM	504	t1 = cpu_clock(this_cpu);
2d92f227	505	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	506	"clock-delta", (long long)(t1-t0));
	507	}
	508	}
	509
	510	void proc_sched_set_task(struct task_struct *p)
	511	{
6cfb0d5d	512	#ifdef CONFIG_SCHEDSTATS
41acab88	513	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
6cfb0d5d	514	#endif
43ae34cb	515	}