[linux-2.6-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)

#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->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);
#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.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 task_group *tg = cfs_rq->tg;

	cgroup_path(tg->css.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 = cfs_rq->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);

	SEQ_printf(m, "  .%-30s: %d\n", "nr_spread_over",
			cfs_rq->nr_spread_over);
#ifdef CONFIG_FAIR_GROUP_SCHED
#ifdef CONFIG_SMP
	SEQ_printf(m, "  .%-30s: %lu\n", "shares", cfs_rq->shares);
#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;

	cgroup_path(tg->css.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

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

	P(yld_exp_empty);
	P(yld_act_empty);
	P(yld_both_empty);
	P(yld_count);

	P(sched_switch);
	P(sched_count);
	P(sched_goidle);

	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 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: v0.08, %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", 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;
	unsigned long flags;
	int num_threads = 1;

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

	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

	{
		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
	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
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
	73	PN(se->wait_start);
	74	PN(se->sleep_start);
	75	PN(se->block_start);
	76	PN(se->sleep_max);
	77	PN(se->block_max);
	78	PN(se->exec_max);
	79	PN(se->slice_max);
	80	PN(se->wait_max);
	81	PN(se->wait_sum);
	82	P(se->wait_count);
	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),
	106	SPLIT_NS(p->se.sum_exec_runtime),
	107	SPLIT_NS(p->se.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
	117	cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
	118	SEQ_printf(m, " %s", path);
	119	}
	120	#endif
	121	SEQ_printf(m, "\n");
43ae34cb IM	122	}
43ae34cb IM	123
a48da48b	124	static void print_rq(struct seq_file m, struct rq rq, int rq_cpu)
43ae34cb IM	125	{
43ae34cb IM	126	struct task_struct g, p;
ab63a633	127	unsigned long flags;
43ae34cb IM	128
	129	SEQ_printf(m,
	130	"\nrunnable tasks:\n"
c86da3a3 MG	131	" task PID tree-key switches prio"
c86da3a3 MG	132	" exec-runtime sum-exec sum-sleep\n"
1a75b94f	133	"------------------------------------------------------"
c86da3a3	134	"----------------------------------------------------\n");
43ae34cb	135
ab63a633	136	read_lock_irqsave(&tasklist_lock, flags);
43ae34cb IM	137
	138	do_each_thread(g, p) {
	139	if (!p->se.on_rq \|\| task_cpu(p) != rq_cpu)
	140	continue;
	141
a48da48b	142	print_task(m, rq, p);
43ae34cb IM	143	} while_each_thread(g, p);
43ae34cb IM	144
ab63a633	145	read_unlock_irqrestore(&tasklist_lock, flags);
43ae34cb IM	146	}
43ae34cb IM	147
5cef9eca	148	void print_cfs_rq(struct seq_file m, int cpu, struct cfs_rq cfs_rq)
43ae34cb	149	{
86d9560c IM	150	s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
86d9560c IM	151	spread, rq0_min_vruntime, spread0;
67e12eac IM	152	struct rq *rq = &per_cpu(runqueues, cpu);
	153	struct sched_entity *last;
	154	unsigned long flags;
	155
ada18de2	156	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
d19ca308	157	char path[128] = "";
d19ca308 PZ	158	struct task_group *tg = cfs_rq->tg;
d19ca308 PZ	159
0a0db8f5	160	cgroup_path(tg->css.cgroup, path, sizeof(path));
d19ca308 PZ	161
d19ca308 PZ	162	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
ada18de2 PZ	163	#else
ada18de2 PZ	164	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
d19ca308	165	#endif
43ae34cb	166
ef83a571 IM	167	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
ef83a571 IM	168	SPLIT_NS(cfs_rq->exec_clock));
67e12eac IM	169
	170	spin_lock_irqsave(&rq->lock, flags);
	171	if (cfs_rq->rb_leftmost)
	172	MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
	173	last = __pick_last_entity(cfs_rq);
	174	if (last)
	175	max_vruntime = last->vruntime;
5ac5c4d6	176	min_vruntime = cfs_rq->min_vruntime;
86d9560c	177	rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
67e12eac	178	spin_unlock_irqrestore(&rq->lock, flags);
ef83a571 IM	179	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
	180	SPLIT_NS(MIN_vruntime));
	181	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
	182	SPLIT_NS(min_vruntime));
	183	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
	184	SPLIT_NS(max_vruntime));
67e12eac	185	spread = max_vruntime - MIN_vruntime;
ef83a571 IM	186	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
ef83a571 IM	187	SPLIT_NS(spread));
86d9560c	188	spread0 = min_vruntime - rq0_min_vruntime;
ef83a571 IM	189	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
ef83a571 IM	190	SPLIT_NS(spread0));
545f3b18 SV	191	SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
545f3b18 SV	192	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
32df2ee8	193
5ac5c4d6	194	SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
ddc97297	195	cfs_rq->nr_spread_over);
c09595f6 PZ	196	#ifdef CONFIG_FAIR_GROUP_SCHED
	197	#ifdef CONFIG_SMP
	198	SEQ_printf(m, " .%-30s: %lu\n", "shares", cfs_rq->shares);
	199	#endif
ff9b48c3	200	print_cfs_group_stats(m, cpu, cfs_rq->tg);
c09595f6	201	#endif
43ae34cb IM	202	}
43ae34cb IM	203
ada18de2 PZ	204	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
	205	{
	206	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
	207	char path[128] = "";
ada18de2 PZ	208	struct task_group *tg = rt_rq->tg;
ada18de2 PZ	209
0a0db8f5	210	cgroup_path(tg->css.cgroup, path, sizeof(path));
ada18de2 PZ	211
	212	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
	213	#else
	214	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
	215	#endif
	216
	217
	218	#define P(x) \
	219	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	220	#define PN(x) \
	221	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	222
	223	P(rt_nr_running);
	224	P(rt_throttled);
	225	PN(rt_time);
	226	PN(rt_runtime);
	227
	228	#undef PN
	229	#undef P
	230	}
	231
a48da48b	232	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb IM	233	{
	234	struct rq *rq = &per_cpu(runqueues, cpu);
	235
	236	#ifdef CONFIG_X86
	237	{
	238	unsigned int freq = cpu_khz ? : 1;
	239
	240	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	241	cpu, freq / 1000, (freq % 1000));
	242	}
	243	#else
	244	SEQ_printf(m, "\ncpu#%d\n", cpu);
	245	#endif
	246
	247	#define P(x) \
	248	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
ef83a571 IM	249	#define PN(x) \
ef83a571 IM	250	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	251
	252	P(nr_running);
	253	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	254	rq->load.weight);
43ae34cb IM	255	P(nr_switches);
	256	P(nr_load_updates);
	257	P(nr_uninterruptible);
	258	SEQ_printf(m, " .%-30s: %lu\n", "jiffies", jiffies);
ef83a571	259	PN(next_balance);
43ae34cb	260	P(curr->pid);
ef83a571	261	PN(clock);
43ae34cb IM	262	P(cpu_load[0]);
	263	P(cpu_load[1]);
	264	P(cpu_load[2]);
	265	P(cpu_load[3]);
	266	P(cpu_load[4]);
	267	#undef P
ef83a571	268	#undef PN
43ae34cb	269
5ac5c4d6 PZ	270	#ifdef CONFIG_SCHEDSTATS
	271	#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
	272
	273	P(yld_exp_empty);
	274	P(yld_act_empty);
	275	P(yld_both_empty);
	276	P(yld_count);
	277
	278	P(sched_switch);
	279	P(sched_count);
	280	P(sched_goidle);
	281
	282	P(ttwu_count);
	283	P(ttwu_local);
	284
	285	P(bkl_count);
	286
	287	#undef P
	288	#endif
5cef9eca	289	print_cfs_stats(m, cpu);
ada18de2	290	print_rt_stats(m, cpu);
43ae34cb	291
a48da48b	292	print_rq(m, rq, cpu);
43ae34cb IM	293	}
	294
	295	static int sched_debug_show(struct seq_file m, void v)
	296	{
	297	u64 now = ktime_to_ns(ktime_get());
	298	int cpu;
	299
ff9b48c3	300	SEQ_printf(m, "Sched Debug Version: v0.08, %s %.*s\n",
43ae34cb IM	301	init_utsname()->release,
	302	(int)strcspn(init_utsname()->version, " "),
	303	init_utsname()->version);
	304
ef83a571	305	SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
43ae34cb	306
1aa4731e	307	#define P(x) \
d822cece	308	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	309	#define PN(x) \
d822cece	310	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1aa4731e	311	PN(sysctl_sched_latency);
b2be5e96	312	PN(sysctl_sched_min_granularity);
1aa4731e	313	PN(sysctl_sched_wakeup_granularity);
1aa4731e IM	314	PN(sysctl_sched_child_runs_first);
	315	P(sysctl_sched_features);
	316	#undef PN
	317	#undef P
	318
43ae34cb	319	for_each_online_cpu(cpu)
a48da48b	320	print_cpu(m, cpu);
43ae34cb IM	321
	322	SEQ_printf(m, "\n");
	323
	324	return 0;
	325	}
	326
f3373461	327	static void sysrq_sched_debug_show(void)
43ae34cb IM	328	{
	329	sched_debug_show(NULL, NULL);
	330	}
	331
	332	static int sched_debug_open(struct inode inode, struct file filp)
	333	{
	334	return single_open(filp, sched_debug_show, NULL);
	335	}
	336
0dbee3a6	337	static const struct file_operations sched_debug_fops = {
43ae34cb IM	338	.open = sched_debug_open,
	339	.read = seq_read,
	340	.llseek = seq_lseek,
5ea473a1	341	.release = single_release,
43ae34cb IM	342	};
	343
	344	static int __init init_sched_debug_procfs(void)
	345	{
	346	struct proc_dir_entry *pe;
	347
a9cf4ddb	348	pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
43ae34cb IM	349	if (!pe)
43ae34cb IM	350	return -ENOMEM;
43ae34cb IM	351	return 0;
	352	}
	353
	354	__initcall(init_sched_debug_procfs);
	355
	356	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	357	{
cc367732	358	unsigned long nr_switches;
43ae34cb IM	359	unsigned long flags;
	360	int num_threads = 1;
	361
43ae34cb IM	362	if (lock_task_sighand(p, &flags)) {
	363	num_threads = atomic_read(&p->signal->count);
	364	unlock_task_sighand(p, &flags);
	365	}
43ae34cb IM	366
43ae34cb IM	367	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
2d92f227 IM	368	SEQ_printf(m,
2d92f227 IM	369	"---------------------------------------------------------\n");
cc367732 IM	370	#define __P(F) \
cc367732 IM	371	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	372	#define P(F) \
2d92f227	373	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	374	#define __PN(F) \
cc367732 IM	375	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	376	#define PN(F) \
2d92f227	377	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	378
ef83a571 IM	379	PN(se.exec_start);
	380	PN(se.vruntime);
	381	PN(se.sum_exec_runtime);
4ae7d5ce	382	PN(se.avg_overlap);
6cfb0d5d	383
cc367732 IM	384	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	385
6cfb0d5d	386	#ifdef CONFIG_SCHEDSTATS
ef83a571 IM	387	PN(se.wait_start);
	388	PN(se.sleep_start);
	389	PN(se.block_start);
	390	PN(se.sleep_max);
	391	PN(se.block_max);
	392	PN(se.exec_max);
	393	PN(se.slice_max);
	394	PN(se.wait_max);
6d082592 AV	395	PN(se.wait_sum);
6d082592 AV	396	P(se.wait_count);
2d72376b	397	P(sched_info.bkl_count);
cc367732 IM	398	P(se.nr_migrations);
	399	P(se.nr_migrations_cold);
	400	P(se.nr_failed_migrations_affine);
	401	P(se.nr_failed_migrations_running);
	402	P(se.nr_failed_migrations_hot);
	403	P(se.nr_forced_migrations);
	404	P(se.nr_forced2_migrations);
	405	P(se.nr_wakeups);
	406	P(se.nr_wakeups_sync);
	407	P(se.nr_wakeups_migrate);
	408	P(se.nr_wakeups_local);
	409	P(se.nr_wakeups_remote);
	410	P(se.nr_wakeups_affine);
	411	P(se.nr_wakeups_affine_attempts);
	412	P(se.nr_wakeups_passive);
	413	P(se.nr_wakeups_idle);
	414
	415	{
	416	u64 avg_atom, avg_per_cpu;
	417
	418	avg_atom = p->se.sum_exec_runtime;
	419	if (nr_switches)
	420	do_div(avg_atom, nr_switches);
	421	else
	422	avg_atom = -1LL;
	423
	424	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	425	if (p->se.nr_migrations) {
6f6d6a1a RZ	426	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	427	p->se.nr_migrations);
c1a89740	428	} else {
cc367732	429	avg_per_cpu = -1LL;
c1a89740	430	}
cc367732 IM	431
	432	__PN(avg_atom);
	433	__PN(avg_per_cpu);
	434	}
6cfb0d5d	435	#endif
cc367732	436	__P(nr_switches);
2d92f227	437	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	438	"nr_voluntary_switches", (long long)p->nvcsw);
	439	SEQ_printf(m, "%-35s:%21Ld\n",
	440	"nr_involuntary_switches", (long long)p->nivcsw);
	441
43ae34cb IM	442	P(se.load.weight);
	443	P(policy);
	444	P(prio);
ef83a571	445	#undef PN
cc367732 IM	446	#undef __PN
	447	#undef P
	448	#undef __P
43ae34cb IM	449
43ae34cb IM	450	{
29d7b90c	451	unsigned int this_cpu = raw_smp_processor_id();
43ae34cb IM	452	u64 t0, t1;
43ae34cb IM	453
29d7b90c IM	454	t0 = cpu_clock(this_cpu);
29d7b90c IM	455	t1 = cpu_clock(this_cpu);
2d92f227	456	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	457	"clock-delta", (long long)(t1-t0));
	458	}
	459	}
	460
	461	void proc_sched_set_task(struct task_struct *p)
	462	{
6cfb0d5d	463	#ifdef CONFIG_SCHEDSTATS
cc367732	464	p->se.wait_max = 0;
6d082592 AV	465	p->se.wait_sum = 0;
6d082592 AV	466	p->se.wait_count = 0;
cc367732 IM	467	p->se.sleep_max = 0;
	468	p->se.sum_sleep_runtime = 0;
	469	p->se.block_max = 0;
	470	p->se.exec_max = 0;
	471	p->se.slice_max = 0;
	472	p->se.nr_migrations = 0;
	473	p->se.nr_migrations_cold = 0;
	474	p->se.nr_failed_migrations_affine = 0;
	475	p->se.nr_failed_migrations_running = 0;
	476	p->se.nr_failed_migrations_hot = 0;
	477	p->se.nr_forced_migrations = 0;
	478	p->se.nr_forced2_migrations = 0;
	479	p->se.nr_wakeups = 0;
	480	p->se.nr_wakeups_sync = 0;
	481	p->se.nr_wakeups_migrate = 0;
	482	p->se.nr_wakeups_local = 0;
	483	p->se.nr_wakeups_remote = 0;
	484	p->se.nr_wakeups_affine = 0;
	485	p->se.nr_wakeups_affine_attempts = 0;
	486	p->se.nr_wakeups_passive = 0;
	487	p->se.nr_wakeups_idle = 0;
	488	p->sched_info.bkl_count = 0;
6cfb0d5d	489	#endif
cc367732 IM	490	p->se.sum_exec_runtime = 0;
	491	p->se.prev_sum_exec_runtime = 0;
	492	p->nvcsw = 0;
	493	p->nivcsw = 0;
43ae34cb	494	}