[mirror_ubuntu-zesty-kernel.git] / kernel / sched / debug.c

/*
 * kernel/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>

#include "sched.h"

static DEFINE_SPINLOCK(sched_debug_lock);

/*
 * 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];

#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))

	if (!se) {
		struct sched_avg *avg = &cpu_rq(cpu)->avg;
		P(avg->runnable_avg_sum);
		P(avg->runnable_avg_period);
		return;
	}


	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);
#ifdef CONFIG_SMP
	P(se->avg.runnable_avg_sum);
	P(se->avg.runnable_avg_period);
	P(se->avg.load_avg_contrib);
#endif
#undef PN
#undef P
}
#endif

#ifdef CONFIG_CGROUP_SCHED
static char group_path[PATH_MAX];

static char *task_group_path(struct task_group *tg)
{
	if (autogroup_path(tg, group_path, PATH_MAX))
		return group_path;

	/*
	 * May be NULL if the underlying cgroup isn't fully-created yet
	 */
	if (!tg->css.cgroup) {
		group_path[0] = '\0';
		return group_path;
	}
	cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
	return group_path;
}
#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
	SEQ_printf(m, " %s", task_group_path(task_group(p)));
#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->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 = cpu_rq(cpu);
	struct sched_entity *last;
	unsigned long flags;

#ifdef CONFIG_FAIR_GROUP_SCHED
	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
#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_first_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: %d\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(&cfs_rq->tg->load_weight));
	SEQ_printf(m, "  .%-30s: %lld\n", "runnable_load_avg",
			cfs_rq->runnable_load_avg);
#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)
{
#ifdef CONFIG_RT_GROUP_SCHED
	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
#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);
	unsigned long flags;

#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)								\
do {									\
	if (sizeof(rq->x) == 4)						\
		SEQ_printf(m, "  .%-30s: %ld\n", #x, (long)(rq->x));	\
	else								\
		SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rq->x));\
} while (0)

#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_count);
	P(sched_goidle);
#ifdef CONFIG_SMP
	P64(avg_idle);
#endif

	P(ttwu_count);
	P(ttwu_local);

#undef P
#undef P64
#endif
	spin_lock_irqsave(&sched_debug_lock, flags);
	print_cfs_stats(m, cpu);
	print_rt_stats(m, cpu);

	rcu_read_lock();
	print_rq(m, rq, cpu);
	rcu_read_unlock();
	spin_unlock_irqrestore(&sched_debug_lock, flags);
}

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;
}

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(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	1	/*
391e43da	2	* kernel/sched/debug.c
43ae34cb IM	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
029632fb PZ	19	#include "sched.h"
029632fb PZ	20
efe25c2c BR	21	static DEFINE_SPINLOCK(sched_debug_lock);
efe25c2c BR	22
43ae34cb IM	23	/*
	24	* This allows printing both to /proc/sched_debug and
	25	* to the console
	26	*/
	27	#define SEQ_printf(m, x...) \
	28	do { \
	29	if (m) \
	30	seq_printf(m, x); \
	31	else \
	32	printk(x); \
	33	} while (0)
	34
ef83a571 IM	35	/*
	36	* Ease the printing of nsec fields:
	37	*/
90b2628f	38	static long long nsec_high(unsigned long long nsec)
ef83a571	39	{
90b2628f	40	if ((long long)nsec < 0) {
ef83a571 IM	41	nsec = -nsec;
	42	do_div(nsec, 1000000);
	43	return -nsec;
	44	}
	45	do_div(nsec, 1000000);
	46
	47	return nsec;
	48	}
	49
90b2628f	50	static unsigned long nsec_low(unsigned long long nsec)
ef83a571	51	{
90b2628f	52	if ((long long)nsec < 0)
ef83a571 IM	53	nsec = -nsec;
	54
	55	return do_div(nsec, 1000000);
	56	}
	57
	58	#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
	59
ff9b48c3	60	#ifdef CONFIG_FAIR_GROUP_SCHED
5091faa4	61	static void print_cfs_group_stats(struct seq_file m, int cpu, struct task_group tg)
ff9b48c3 BR	62	{
ff9b48c3 BR	63	struct sched_entity *se = tg->se[cpu];
ff9b48c3 BR	64
	65	#define P(F) \
	66	SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
	67	#define PN(F) \
	68	SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
	69
18bf2805 BS	70	if (!se) {
	71	struct sched_avg *avg = &cpu_rq(cpu)->avg;
	72	P(avg->runnable_avg_sum);
	73	P(avg->runnable_avg_period);
	74	return;
	75	}
	76
	77
ff9b48c3 BR	78	PN(se->exec_start);
	79	PN(se->vruntime);
	80	PN(se->sum_exec_runtime);
	81	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	82	PN(se->statistics.wait_start);
	83	PN(se->statistics.sleep_start);
	84	PN(se->statistics.block_start);
	85	PN(se->statistics.sleep_max);
	86	PN(se->statistics.block_max);
	87	PN(se->statistics.exec_max);
	88	PN(se->statistics.slice_max);
	89	PN(se->statistics.wait_max);
	90	PN(se->statistics.wait_sum);
	91	P(se->statistics.wait_count);
ff9b48c3 BR	92	#endif
ff9b48c3 BR	93	P(se->load.weight);
9d85f21c PT	94	#ifdef CONFIG_SMP
	95	P(se->avg.runnable_avg_sum);
	96	P(se->avg.runnable_avg_period);
2dac754e	97	P(se->avg.load_avg_contrib);
9d85f21c	98	#endif
ff9b48c3 BR	99	#undef PN
	100	#undef P
	101	}
	102	#endif
	103
efe25c2c BR	104	#ifdef CONFIG_CGROUP_SCHED
	105	static char group_path[PATH_MAX];
	106
	107	static char task_group_path(struct task_group tg)
	108	{
8ecedd7a BR	109	if (autogroup_path(tg, group_path, PATH_MAX))
	110	return group_path;
	111
efe25c2c BR	112	/*
	113	* May be NULL if the underlying cgroup isn't fully-created yet
	114	*/
	115	if (!tg->css.cgroup) {
	116	group_path[0] = '\0';
	117	return group_path;
	118	}
	119	cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
	120	return group_path;
	121	}
	122	#endif
	123
43ae34cb	124	static void
a48da48b	125	print_task(struct seq_file m, struct rq rq, struct task_struct *p)
43ae34cb IM	126	{
	127	if (rq->curr == p)
	128	SEQ_printf(m, "R");
	129	else
	130	SEQ_printf(m, " ");
	131
ef83a571	132	SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
43ae34cb	133	p->comm, p->pid,
ef83a571	134	SPLIT_NS(p->se.vruntime),
43ae34cb	135	(long long)(p->nvcsw + p->nivcsw),
6f605d83	136	p->prio);
6cfb0d5d	137	#ifdef CONFIG_SCHEDSTATS
d19ca308	138	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
ef83a571 IM	139	SPLIT_NS(p->se.vruntime),
ef83a571 IM	140	SPLIT_NS(p->se.sum_exec_runtime),
41acab88	141	SPLIT_NS(p->se.statistics.sum_sleep_runtime));
6cfb0d5d	142	#else
d19ca308	143	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
ef83a571	144	0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
6cfb0d5d	145	#endif
efe25c2c BR	146	#ifdef CONFIG_CGROUP_SCHED
	147	SEQ_printf(m, " %s", task_group_path(task_group(p)));
	148	#endif
d19ca308	149
d19ca308	150	SEQ_printf(m, "\n");
43ae34cb IM	151	}
43ae34cb IM	152
a48da48b	153	static void print_rq(struct seq_file m, struct rq rq, int rq_cpu)
43ae34cb IM	154	{
43ae34cb IM	155	struct task_struct g, p;
ab63a633	156	unsigned long flags;
43ae34cb IM	157
	158	SEQ_printf(m,
	159	"\nrunnable tasks:\n"
c86da3a3 MG	160	" task PID tree-key switches prio"
c86da3a3 MG	161	" exec-runtime sum-exec sum-sleep\n"
1a75b94f	162	"------------------------------------------------------"
c86da3a3	163	"----------------------------------------------------\n");
43ae34cb	164
ab63a633	165	read_lock_irqsave(&tasklist_lock, flags);
43ae34cb IM	166
43ae34cb IM	167	do_each_thread(g, p) {
fd2f4419	168	if (!p->on_rq \|\| task_cpu(p) != rq_cpu)
43ae34cb IM	169	continue;
43ae34cb IM	170
a48da48b	171	print_task(m, rq, p);
43ae34cb IM	172	} while_each_thread(g, p);
43ae34cb IM	173
ab63a633	174	read_unlock_irqrestore(&tasklist_lock, flags);
43ae34cb IM	175	}
43ae34cb IM	176
5cef9eca	177	void print_cfs_rq(struct seq_file m, int cpu, struct cfs_rq cfs_rq)
43ae34cb	178	{
86d9560c IM	179	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
86d9560c IM	180	spread, rq0_min_vruntime, spread0;
348ec61e	181	struct rq *rq = cpu_rq(cpu);
67e12eac IM	182	struct sched_entity *last;
	183	unsigned long flags;
	184
efe25c2c BR	185	#ifdef CONFIG_FAIR_GROUP_SCHED
	186	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
	187	#else
ada18de2	188	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
efe25c2c	189	#endif
ef83a571 IM	190	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
ef83a571 IM	191	SPLIT_NS(cfs_rq->exec_clock));
67e12eac	192
05fa785c	193	raw_spin_lock_irqsave(&rq->lock, flags);
67e12eac	194	if (cfs_rq->rb_leftmost)
ac53db59	195	MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
67e12eac IM	196	last = __pick_last_entity(cfs_rq);
	197	if (last)
	198	max_vruntime = last->vruntime;
5ac5c4d6	199	min_vruntime = cfs_rq->min_vruntime;
348ec61e	200	rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
05fa785c	201	raw_spin_unlock_irqrestore(&rq->lock, flags);
ef83a571 IM	202	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
	203	SPLIT_NS(MIN_vruntime));
	204	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
	205	SPLIT_NS(min_vruntime));
	206	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
	207	SPLIT_NS(max_vruntime));
67e12eac	208	spread = max_vruntime - MIN_vruntime;
ef83a571 IM	209	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
ef83a571 IM	210	SPLIT_NS(spread));
86d9560c	211	spread0 = min_vruntime - rq0_min_vruntime;
ef83a571 IM	212	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
ef83a571 IM	213	SPLIT_NS(spread0));
5ac5c4d6	214	SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
ddc97297	215	cfs_rq->nr_spread_over);
c82513e5	216	SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
2069dd75	217	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
c09595f6 PZ	218	#ifdef CONFIG_FAIR_GROUP_SCHED
c09595f6 PZ	219	#ifdef CONFIG_SMP
2069dd75 PZ	220	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
	221	SPLIT_NS(cfs_rq->load_avg));
	222	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
	223	SPLIT_NS(cfs_rq->load_period));
	224	SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
	225	cfs_rq->load_contribution);
	226	SEQ_printf(m, " .%-30s: %d\n", "load_tg",
5091faa4	227	atomic_read(&cfs_rq->tg->load_weight));
2dac754e PT	228	SEQ_printf(m, " .%-30s: %lld\n", "runnable_load_avg",
2dac754e PT	229	cfs_rq->runnable_load_avg);
c09595f6	230	#endif
2069dd75	231
ff9b48c3	232	print_cfs_group_stats(m, cpu, cfs_rq->tg);
c09595f6	233	#endif
43ae34cb IM	234	}
43ae34cb IM	235
ada18de2 PZ	236	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
ada18de2 PZ	237	{
efe25c2c BR	238	#ifdef CONFIG_RT_GROUP_SCHED
	239	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
	240	#else
ada18de2	241	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
efe25c2c	242	#endif
ada18de2 PZ	243
	244	#define P(x) \
	245	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	246	#define PN(x) \
	247	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	248
	249	P(rt_nr_running);
	250	P(rt_throttled);
	251	PN(rt_time);
	252	PN(rt_runtime);
	253
	254	#undef PN
	255	#undef P
	256	}
	257
5bb6b1ea PZ	258	extern __read_mostly int sched_clock_running;
5bb6b1ea PZ	259
a48da48b	260	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb	261	{
348ec61e	262	struct rq *rq = cpu_rq(cpu);
efe25c2c	263	unsigned long flags;
43ae34cb IM	264
	265	#ifdef CONFIG_X86
	266	{
	267	unsigned int freq = cpu_khz ? : 1;
	268
	269	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	270	cpu, freq / 1000, (freq % 1000));
	271	}
	272	#else
	273	SEQ_printf(m, "\ncpu#%d\n", cpu);
	274	#endif
	275
13e099d2 PZ	276	#define P(x) \
	277	do { \
	278	if (sizeof(rq->x) == 4) \
	279	SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \
	280	else \
	281	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
	282	} while (0)
	283
ef83a571 IM	284	#define PN(x) \
ef83a571 IM	285	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	286
	287	P(nr_running);
	288	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	289	rq->load.weight);
43ae34cb IM	290	P(nr_switches);
	291	P(nr_load_updates);
	292	P(nr_uninterruptible);
ef83a571	293	PN(next_balance);
43ae34cb	294	P(curr->pid);
ef83a571	295	PN(clock);
43ae34cb IM	296	P(cpu_load[0]);
	297	P(cpu_load[1]);
	298	P(cpu_load[2]);
	299	P(cpu_load[3]);
	300	P(cpu_load[4]);
	301	#undef P
ef83a571	302	#undef PN
43ae34cb	303
5ac5c4d6 PZ	304	#ifdef CONFIG_SCHEDSTATS
5ac5c4d6 PZ	305	#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
1b9508f6	306	#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
5ac5c4d6	307
5ac5c4d6 PZ	308	P(yld_count);
5ac5c4d6 PZ	309
5ac5c4d6 PZ	310	P(sched_count);
5ac5c4d6 PZ	311	P(sched_goidle);
1b9508f6 MG	312	#ifdef CONFIG_SMP
	313	P64(avg_idle);
	314	#endif
5ac5c4d6 PZ	315
	316	P(ttwu_count);
	317	P(ttwu_local);
	318
5ac5c4d6	319	#undef P
fce20979	320	#undef P64
5ac5c4d6	321	#endif
efe25c2c	322	spin_lock_irqsave(&sched_debug_lock, flags);
5cef9eca	323	print_cfs_stats(m, cpu);
ada18de2	324	print_rt_stats(m, cpu);
43ae34cb	325
efe25c2c	326	rcu_read_lock();
a48da48b	327	print_rq(m, rq, cpu);
efe25c2c BR	328	rcu_read_unlock();
efe25c2c BR	329	spin_unlock_irqrestore(&sched_debug_lock, flags);
43ae34cb IM	330	}
43ae34cb IM	331
1983a922 CE	332	static const char *sched_tunable_scaling_names[] = {
	333	"none",
	334	"logaritmic",
	335	"linear"
	336	};
	337
43ae34cb IM	338	static int sched_debug_show(struct seq_file m, void v)
43ae34cb IM	339	{
5bb6b1ea PZ	340	u64 ktime, sched_clk, cpu_clk;
5bb6b1ea PZ	341	unsigned long flags;
43ae34cb IM	342	int cpu;
43ae34cb IM	343
5bb6b1ea PZ	344	local_irq_save(flags);
	345	ktime = ktime_to_ns(ktime_get());
	346	sched_clk = sched_clock();
	347	cpu_clk = local_clock();
	348	local_irq_restore(flags);
	349
	350	SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
43ae34cb IM	351	init_utsname()->release,
	352	(int)strcspn(init_utsname()->version, " "),
	353	init_utsname()->version);
	354
5bb6b1ea PZ	355	#define P(x) \
	356	SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
	357	#define PN(x) \
	358	SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
	359	PN(ktime);
	360	PN(sched_clk);
	361	PN(cpu_clk);
	362	P(jiffies);
	363	#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
	364	P(sched_clock_stable);
	365	#endif
	366	#undef PN
	367	#undef P
	368
	369	SEQ_printf(m, "\n");
	370	SEQ_printf(m, "sysctl_sched\n");
43ae34cb	371
1aa4731e	372	#define P(x) \
d822cece	373	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	374	#define PN(x) \
d822cece	375	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1aa4731e	376	PN(sysctl_sched_latency);
b2be5e96	377	PN(sysctl_sched_min_granularity);
1aa4731e	378	PN(sysctl_sched_wakeup_granularity);
eebef746	379	P(sysctl_sched_child_runs_first);
1aa4731e IM	380	P(sysctl_sched_features);
	381	#undef PN
	382	#undef P
	383
1983a922 CE	384	SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
	385	sysctl_sched_tunable_scaling,
	386	sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
	387
43ae34cb	388	for_each_online_cpu(cpu)
a48da48b	389	print_cpu(m, cpu);
43ae34cb IM	390
	391	SEQ_printf(m, "\n");
	392
	393	return 0;
	394	}
	395
029632fb	396	void sysrq_sched_debug_show(void)
43ae34cb IM	397	{
	398	sched_debug_show(NULL, NULL);
	399	}
	400
	401	static int sched_debug_open(struct inode inode, struct file filp)
	402	{
	403	return single_open(filp, sched_debug_show, NULL);
	404	}
	405
0dbee3a6	406	static const struct file_operations sched_debug_fops = {
43ae34cb IM	407	.open = sched_debug_open,
	408	.read = seq_read,
	409	.llseek = seq_lseek,
5ea473a1	410	.release = single_release,
43ae34cb IM	411	};
	412
	413	static int __init init_sched_debug_procfs(void)
	414	{
	415	struct proc_dir_entry *pe;
	416
a9cf4ddb	417	pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
43ae34cb IM	418	if (!pe)
43ae34cb IM	419	return -ENOMEM;
43ae34cb IM	420	return 0;
	421	}
	422
	423	__initcall(init_sched_debug_procfs);
	424
	425	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	426	{
cc367732	427	unsigned long nr_switches;
43ae34cb	428
5089a976 ON	429	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
5089a976 ON	430	get_nr_threads(p));
2d92f227 IM	431	SEQ_printf(m,
2d92f227 IM	432	"---------------------------------------------------------\n");
cc367732 IM	433	#define __P(F) \
cc367732 IM	434	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	435	#define P(F) \
2d92f227	436	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	437	#define __PN(F) \
cc367732 IM	438	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	439	#define PN(F) \
2d92f227	440	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	441
ef83a571 IM	442	PN(se.exec_start);
	443	PN(se.vruntime);
	444	PN(se.sum_exec_runtime);
6cfb0d5d	445
cc367732 IM	446	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	447
6cfb0d5d	448	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	449	PN(se.statistics.wait_start);
	450	PN(se.statistics.sleep_start);
	451	PN(se.statistics.block_start);
	452	PN(se.statistics.sleep_max);
	453	PN(se.statistics.block_max);
	454	PN(se.statistics.exec_max);
	455	PN(se.statistics.slice_max);
	456	PN(se.statistics.wait_max);
	457	PN(se.statistics.wait_sum);
	458	P(se.statistics.wait_count);
	459	PN(se.statistics.iowait_sum);
	460	P(se.statistics.iowait_count);
cc367732	461	P(se.nr_migrations);
41acab88 LDM	462	P(se.statistics.nr_migrations_cold);
	463	P(se.statistics.nr_failed_migrations_affine);
	464	P(se.statistics.nr_failed_migrations_running);
	465	P(se.statistics.nr_failed_migrations_hot);
	466	P(se.statistics.nr_forced_migrations);
	467	P(se.statistics.nr_wakeups);
	468	P(se.statistics.nr_wakeups_sync);
	469	P(se.statistics.nr_wakeups_migrate);
	470	P(se.statistics.nr_wakeups_local);
	471	P(se.statistics.nr_wakeups_remote);
	472	P(se.statistics.nr_wakeups_affine);
	473	P(se.statistics.nr_wakeups_affine_attempts);
	474	P(se.statistics.nr_wakeups_passive);
	475	P(se.statistics.nr_wakeups_idle);
cc367732 IM	476
	477	{
	478	u64 avg_atom, avg_per_cpu;
	479
	480	avg_atom = p->se.sum_exec_runtime;
	481	if (nr_switches)
	482	do_div(avg_atom, nr_switches);
	483	else
	484	avg_atom = -1LL;
	485
	486	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	487	if (p->se.nr_migrations) {
6f6d6a1a RZ	488	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	489	p->se.nr_migrations);
c1a89740	490	} else {
cc367732	491	avg_per_cpu = -1LL;
c1a89740	492	}
cc367732 IM	493
	494	__PN(avg_atom);
	495	__PN(avg_per_cpu);
	496	}
6cfb0d5d	497	#endif
cc367732	498	__P(nr_switches);
2d92f227	499	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	500	"nr_voluntary_switches", (long long)p->nvcsw);
	501	SEQ_printf(m, "%-35s:%21Ld\n",
	502	"nr_involuntary_switches", (long long)p->nivcsw);
	503
43ae34cb IM	504	P(se.load.weight);
	505	P(policy);
	506	P(prio);
ef83a571	507	#undef PN
cc367732 IM	508	#undef __PN
	509	#undef P
	510	#undef __P
43ae34cb IM	511
43ae34cb IM	512	{
29d7b90c	513	unsigned int this_cpu = raw_smp_processor_id();
43ae34cb IM	514	u64 t0, t1;
43ae34cb IM	515
29d7b90c IM	516	t0 = cpu_clock(this_cpu);
29d7b90c IM	517	t1 = cpu_clock(this_cpu);
2d92f227	518	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	519	"clock-delta", (long long)(t1-t0));
	520	}
	521	}
	522
	523	void proc_sched_set_task(struct task_struct *p)
	524	{
6cfb0d5d	525	#ifdef CONFIG_SCHEDSTATS
41acab88	526	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
6cfb0d5d	527	#endif
43ae34cb	528	}