[mirror_ubuntu-artful-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);
	P(se->avg.decay_count);
#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);
	SEQ_printf(m, "  .%-30s: %lld\n", "blocked_load_avg",
			cfs_rq->blocked_load_avg);
	SEQ_printf(m, "  .%-30s: %ld\n", "tg_load_avg",
			atomic64_read(&cfs_rq->tg->load_avg));
	SEQ_printf(m, "  .%-30s: %lld\n", "tg_load_contrib",
			cfs_rq->tg_load_contrib);
#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);
9ee474f5	98	P(se->avg.decay_count);
9d85f21c	99	#endif
ff9b48c3 BR	100	#undef PN
	101	#undef P
	102	}
	103	#endif
	104
efe25c2c BR	105	#ifdef CONFIG_CGROUP_SCHED
	106	static char group_path[PATH_MAX];
	107
	108	static char task_group_path(struct task_group tg)
	109	{
8ecedd7a BR	110	if (autogroup_path(tg, group_path, PATH_MAX))
	111	return group_path;
	112
efe25c2c BR	113	/*
	114	* May be NULL if the underlying cgroup isn't fully-created yet
	115	*/
	116	if (!tg->css.cgroup) {
	117	group_path[0] = '\0';
	118	return group_path;
	119	}
	120	cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
	121	return group_path;
	122	}
	123	#endif
	124
43ae34cb	125	static void
a48da48b	126	print_task(struct seq_file m, struct rq rq, struct task_struct *p)
43ae34cb IM	127	{
	128	if (rq->curr == p)
	129	SEQ_printf(m, "R");
	130	else
	131	SEQ_printf(m, " ");
	132
ef83a571	133	SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
43ae34cb	134	p->comm, p->pid,
ef83a571	135	SPLIT_NS(p->se.vruntime),
43ae34cb	136	(long long)(p->nvcsw + p->nivcsw),
6f605d83	137	p->prio);
6cfb0d5d	138	#ifdef CONFIG_SCHEDSTATS
d19ca308	139	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
ef83a571 IM	140	SPLIT_NS(p->se.vruntime),
ef83a571 IM	141	SPLIT_NS(p->se.sum_exec_runtime),
41acab88	142	SPLIT_NS(p->se.statistics.sum_sleep_runtime));
6cfb0d5d	143	#else
d19ca308	144	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
ef83a571	145	0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
6cfb0d5d	146	#endif
efe25c2c BR	147	#ifdef CONFIG_CGROUP_SCHED
	148	SEQ_printf(m, " %s", task_group_path(task_group(p)));
	149	#endif
d19ca308	150
d19ca308	151	SEQ_printf(m, "\n");
43ae34cb IM	152	}
43ae34cb IM	153
a48da48b	154	static void print_rq(struct seq_file m, struct rq rq, int rq_cpu)
43ae34cb IM	155	{
43ae34cb IM	156	struct task_struct g, p;
ab63a633	157	unsigned long flags;
43ae34cb IM	158
	159	SEQ_printf(m,
	160	"\nrunnable tasks:\n"
c86da3a3 MG	161	" task PID tree-key switches prio"
c86da3a3 MG	162	" exec-runtime sum-exec sum-sleep\n"
1a75b94f	163	"------------------------------------------------------"
c86da3a3	164	"----------------------------------------------------\n");
43ae34cb	165
ab63a633	166	read_lock_irqsave(&tasklist_lock, flags);
43ae34cb IM	167
43ae34cb IM	168	do_each_thread(g, p) {
fd2f4419	169	if (!p->on_rq \|\| task_cpu(p) != rq_cpu)
43ae34cb IM	170	continue;
43ae34cb IM	171
a48da48b	172	print_task(m, rq, p);
43ae34cb IM	173	} while_each_thread(g, p);
43ae34cb IM	174
ab63a633	175	read_unlock_irqrestore(&tasklist_lock, flags);
43ae34cb IM	176	}
43ae34cb IM	177
5cef9eca	178	void print_cfs_rq(struct seq_file m, int cpu, struct cfs_rq cfs_rq)
43ae34cb	179	{
86d9560c IM	180	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
86d9560c IM	181	spread, rq0_min_vruntime, spread0;
348ec61e	182	struct rq *rq = cpu_rq(cpu);
67e12eac IM	183	struct sched_entity *last;
	184	unsigned long flags;
	185
efe25c2c BR	186	#ifdef CONFIG_FAIR_GROUP_SCHED
	187	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
	188	#else
ada18de2	189	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
efe25c2c	190	#endif
ef83a571 IM	191	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
ef83a571 IM	192	SPLIT_NS(cfs_rq->exec_clock));
67e12eac	193
05fa785c	194	raw_spin_lock_irqsave(&rq->lock, flags);
67e12eac	195	if (cfs_rq->rb_leftmost)
ac53db59	196	MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
67e12eac IM	197	last = __pick_last_entity(cfs_rq);
	198	if (last)
	199	max_vruntime = last->vruntime;
5ac5c4d6	200	min_vruntime = cfs_rq->min_vruntime;
348ec61e	201	rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
05fa785c	202	raw_spin_unlock_irqrestore(&rq->lock, flags);
ef83a571 IM	203	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
	204	SPLIT_NS(MIN_vruntime));
	205	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
	206	SPLIT_NS(min_vruntime));
	207	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
	208	SPLIT_NS(max_vruntime));
67e12eac	209	spread = max_vruntime - MIN_vruntime;
ef83a571 IM	210	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
ef83a571 IM	211	SPLIT_NS(spread));
86d9560c	212	spread0 = min_vruntime - rq0_min_vruntime;
ef83a571 IM	213	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
ef83a571 IM	214	SPLIT_NS(spread0));
5ac5c4d6	215	SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
ddc97297	216	cfs_rq->nr_spread_over);
c82513e5	217	SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
2069dd75	218	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
c09595f6 PZ	219	#ifdef CONFIG_FAIR_GROUP_SCHED
c09595f6 PZ	220	#ifdef CONFIG_SMP
2069dd75 PZ	221	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
	222	SPLIT_NS(cfs_rq->load_avg));
	223	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
	224	SPLIT_NS(cfs_rq->load_period));
	225	SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
	226	cfs_rq->load_contribution);
	227	SEQ_printf(m, " .%-30s: %d\n", "load_tg",
5091faa4	228	atomic_read(&cfs_rq->tg->load_weight));
2dac754e PT	229	SEQ_printf(m, " .%-30s: %lld\n", "runnable_load_avg",
2dac754e PT	230	cfs_rq->runnable_load_avg);
9ee474f5 PT	231	SEQ_printf(m, " .%-30s: %lld\n", "blocked_load_avg",
9ee474f5 PT	232	cfs_rq->blocked_load_avg);
c566e8e9 PT	233	SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg",
	234	atomic64_read(&cfs_rq->tg->load_avg));
	235	SEQ_printf(m, " .%-30s: %lld\n", "tg_load_contrib",
	236	cfs_rq->tg_load_contrib);
c09595f6	237	#endif
2069dd75	238
ff9b48c3	239	print_cfs_group_stats(m, cpu, cfs_rq->tg);
c09595f6	240	#endif
43ae34cb IM	241	}
43ae34cb IM	242
ada18de2 PZ	243	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
ada18de2 PZ	244	{
efe25c2c BR	245	#ifdef CONFIG_RT_GROUP_SCHED
	246	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
	247	#else
ada18de2	248	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
efe25c2c	249	#endif
ada18de2 PZ	250
	251	#define P(x) \
	252	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	253	#define PN(x) \
	254	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	255
	256	P(rt_nr_running);
	257	P(rt_throttled);
	258	PN(rt_time);
	259	PN(rt_runtime);
	260
	261	#undef PN
	262	#undef P
	263	}
	264
5bb6b1ea PZ	265	extern __read_mostly int sched_clock_running;
5bb6b1ea PZ	266
a48da48b	267	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb	268	{
348ec61e	269	struct rq *rq = cpu_rq(cpu);
efe25c2c	270	unsigned long flags;
43ae34cb IM	271
	272	#ifdef CONFIG_X86
	273	{
	274	unsigned int freq = cpu_khz ? : 1;
	275
	276	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	277	cpu, freq / 1000, (freq % 1000));
	278	}
	279	#else
	280	SEQ_printf(m, "\ncpu#%d\n", cpu);
	281	#endif
	282
13e099d2 PZ	283	#define P(x) \
	284	do { \
	285	if (sizeof(rq->x) == 4) \
	286	SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \
	287	else \
	288	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
	289	} while (0)
	290
ef83a571 IM	291	#define PN(x) \
ef83a571 IM	292	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	293
	294	P(nr_running);
	295	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	296	rq->load.weight);
43ae34cb IM	297	P(nr_switches);
	298	P(nr_load_updates);
	299	P(nr_uninterruptible);
ef83a571	300	PN(next_balance);
43ae34cb	301	P(curr->pid);
ef83a571	302	PN(clock);
43ae34cb IM	303	P(cpu_load[0]);
	304	P(cpu_load[1]);
	305	P(cpu_load[2]);
	306	P(cpu_load[3]);
	307	P(cpu_load[4]);
	308	#undef P
ef83a571	309	#undef PN
43ae34cb	310
5ac5c4d6 PZ	311	#ifdef CONFIG_SCHEDSTATS
5ac5c4d6 PZ	312	#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
1b9508f6	313	#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
5ac5c4d6	314
5ac5c4d6 PZ	315	P(yld_count);
5ac5c4d6 PZ	316
5ac5c4d6 PZ	317	P(sched_count);
5ac5c4d6 PZ	318	P(sched_goidle);
1b9508f6 MG	319	#ifdef CONFIG_SMP
	320	P64(avg_idle);
	321	#endif
5ac5c4d6 PZ	322
	323	P(ttwu_count);
	324	P(ttwu_local);
	325
5ac5c4d6	326	#undef P
fce20979	327	#undef P64
5ac5c4d6	328	#endif
efe25c2c	329	spin_lock_irqsave(&sched_debug_lock, flags);
5cef9eca	330	print_cfs_stats(m, cpu);
ada18de2	331	print_rt_stats(m, cpu);
43ae34cb	332
efe25c2c	333	rcu_read_lock();
a48da48b	334	print_rq(m, rq, cpu);
efe25c2c BR	335	rcu_read_unlock();
efe25c2c BR	336	spin_unlock_irqrestore(&sched_debug_lock, flags);
43ae34cb IM	337	}
43ae34cb IM	338
1983a922 CE	339	static const char *sched_tunable_scaling_names[] = {
	340	"none",
	341	"logaritmic",
	342	"linear"
	343	};
	344
43ae34cb IM	345	static int sched_debug_show(struct seq_file m, void v)
43ae34cb IM	346	{
5bb6b1ea PZ	347	u64 ktime, sched_clk, cpu_clk;
5bb6b1ea PZ	348	unsigned long flags;
43ae34cb IM	349	int cpu;
43ae34cb IM	350
5bb6b1ea PZ	351	local_irq_save(flags);
	352	ktime = ktime_to_ns(ktime_get());
	353	sched_clk = sched_clock();
	354	cpu_clk = local_clock();
	355	local_irq_restore(flags);
	356
	357	SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
43ae34cb IM	358	init_utsname()->release,
	359	(int)strcspn(init_utsname()->version, " "),
	360	init_utsname()->version);
	361
5bb6b1ea PZ	362	#define P(x) \
	363	SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
	364	#define PN(x) \
	365	SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
	366	PN(ktime);
	367	PN(sched_clk);
	368	PN(cpu_clk);
	369	P(jiffies);
	370	#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
	371	P(sched_clock_stable);
	372	#endif
	373	#undef PN
	374	#undef P
	375
	376	SEQ_printf(m, "\n");
	377	SEQ_printf(m, "sysctl_sched\n");
43ae34cb	378
1aa4731e	379	#define P(x) \
d822cece	380	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	381	#define PN(x) \
d822cece	382	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1aa4731e	383	PN(sysctl_sched_latency);
b2be5e96	384	PN(sysctl_sched_min_granularity);
1aa4731e	385	PN(sysctl_sched_wakeup_granularity);
eebef746	386	P(sysctl_sched_child_runs_first);
1aa4731e IM	387	P(sysctl_sched_features);
	388	#undef PN
	389	#undef P
	390
1983a922 CE	391	SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
	392	sysctl_sched_tunable_scaling,
	393	sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
	394
43ae34cb	395	for_each_online_cpu(cpu)
a48da48b	396	print_cpu(m, cpu);
43ae34cb IM	397
	398	SEQ_printf(m, "\n");
	399
	400	return 0;
	401	}
	402
029632fb	403	void sysrq_sched_debug_show(void)
43ae34cb IM	404	{
	405	sched_debug_show(NULL, NULL);
	406	}
	407
	408	static int sched_debug_open(struct inode inode, struct file filp)
	409	{
	410	return single_open(filp, sched_debug_show, NULL);
	411	}
	412
0dbee3a6	413	static const struct file_operations sched_debug_fops = {
43ae34cb IM	414	.open = sched_debug_open,
	415	.read = seq_read,
	416	.llseek = seq_lseek,
5ea473a1	417	.release = single_release,
43ae34cb IM	418	};
	419
	420	static int __init init_sched_debug_procfs(void)
	421	{
	422	struct proc_dir_entry *pe;
	423
a9cf4ddb	424	pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
43ae34cb IM	425	if (!pe)
43ae34cb IM	426	return -ENOMEM;
43ae34cb IM	427	return 0;
	428	}
	429
	430	__initcall(init_sched_debug_procfs);
	431
	432	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	433	{
cc367732	434	unsigned long nr_switches;
43ae34cb	435
5089a976 ON	436	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
5089a976 ON	437	get_nr_threads(p));
2d92f227 IM	438	SEQ_printf(m,
2d92f227 IM	439	"---------------------------------------------------------\n");
cc367732 IM	440	#define __P(F) \
cc367732 IM	441	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	442	#define P(F) \
2d92f227	443	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	444	#define __PN(F) \
cc367732 IM	445	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	446	#define PN(F) \
2d92f227	447	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	448
ef83a571 IM	449	PN(se.exec_start);
	450	PN(se.vruntime);
	451	PN(se.sum_exec_runtime);
6cfb0d5d	452
cc367732 IM	453	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	454
6cfb0d5d	455	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	456	PN(se.statistics.wait_start);
	457	PN(se.statistics.sleep_start);
	458	PN(se.statistics.block_start);
	459	PN(se.statistics.sleep_max);
	460	PN(se.statistics.block_max);
	461	PN(se.statistics.exec_max);
	462	PN(se.statistics.slice_max);
	463	PN(se.statistics.wait_max);
	464	PN(se.statistics.wait_sum);
	465	P(se.statistics.wait_count);
	466	PN(se.statistics.iowait_sum);
	467	P(se.statistics.iowait_count);
cc367732	468	P(se.nr_migrations);
41acab88 LDM	469	P(se.statistics.nr_migrations_cold);
	470	P(se.statistics.nr_failed_migrations_affine);
	471	P(se.statistics.nr_failed_migrations_running);
	472	P(se.statistics.nr_failed_migrations_hot);
	473	P(se.statistics.nr_forced_migrations);
	474	P(se.statistics.nr_wakeups);
	475	P(se.statistics.nr_wakeups_sync);
	476	P(se.statistics.nr_wakeups_migrate);
	477	P(se.statistics.nr_wakeups_local);
	478	P(se.statistics.nr_wakeups_remote);
	479	P(se.statistics.nr_wakeups_affine);
	480	P(se.statistics.nr_wakeups_affine_attempts);
	481	P(se.statistics.nr_wakeups_passive);
	482	P(se.statistics.nr_wakeups_idle);
cc367732 IM	483
	484	{
	485	u64 avg_atom, avg_per_cpu;
	486
	487	avg_atom = p->se.sum_exec_runtime;
	488	if (nr_switches)
	489	do_div(avg_atom, nr_switches);
	490	else
	491	avg_atom = -1LL;
	492
	493	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	494	if (p->se.nr_migrations) {
6f6d6a1a RZ	495	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	496	p->se.nr_migrations);
c1a89740	497	} else {
cc367732	498	avg_per_cpu = -1LL;
c1a89740	499	}
cc367732 IM	500
	501	__PN(avg_atom);
	502	__PN(avg_per_cpu);
	503	}
6cfb0d5d	504	#endif
cc367732	505	__P(nr_switches);
2d92f227	506	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	507	"nr_voluntary_switches", (long long)p->nvcsw);
	508	SEQ_printf(m, "%-35s:%21Ld\n",
	509	"nr_involuntary_switches", (long long)p->nivcsw);
	510
43ae34cb IM	511	P(se.load.weight);
	512	P(policy);
	513	P(prio);
ef83a571	514	#undef PN
cc367732 IM	515	#undef __PN
	516	#undef P
	517	#undef __P
43ae34cb IM	518
43ae34cb IM	519	{
29d7b90c	520	unsigned int this_cpu = raw_smp_processor_id();
43ae34cb IM	521	u64 t0, t1;
43ae34cb IM	522
29d7b90c IM	523	t0 = cpu_clock(this_cpu);
29d7b90c IM	524	t1 = cpu_clock(this_cpu);
2d92f227	525	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	526	"clock-delta", (long long)(t1-t0));
	527	}
	528	}
	529
	530	void proc_sched_set_task(struct task_struct *p)
	531	{
6cfb0d5d	532	#ifdef CONFIG_SCHEDSTATS
41acab88	533	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
6cfb0d5d	534	#endif
43ae34cb	535	}