[net-next-2.6.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: %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;

	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
}

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 now = ktime_to_ns(ktime_get());
	int cpu;

	SEQ_printf(m, "Sched Debug Version: v0.09, %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))
	P(jiffies);
	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

	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;
	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);

	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));
545f3b18 SV	205	SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
545f3b18 SV	206	SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
32df2ee8	207
5ac5c4d6	208	SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
ddc97297	209	cfs_rq->nr_spread_over);
c09595f6 PZ	210	#ifdef CONFIG_FAIR_GROUP_SCHED
	211	#ifdef CONFIG_SMP
	212	SEQ_printf(m, " .%-30s: %lu\n", "shares", cfs_rq->shares);
	213	#endif
ff9b48c3	214	print_cfs_group_stats(m, cpu, cfs_rq->tg);
c09595f6	215	#endif
43ae34cb IM	216	}
43ae34cb IM	217
ada18de2 PZ	218	void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)
	219	{
	220	#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)
805194c3	221	char path[128];
ada18de2 PZ	222	struct task_group *tg = rt_rq->tg;
ada18de2 PZ	223
805194c3	224	task_group_path(tg, path, sizeof(path));
ada18de2 PZ	225
	226	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);
	227	#else
	228	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
	229	#endif
	230
	231
	232	#define P(x) \
	233	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
	234	#define PN(x) \
	235	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
	236
	237	P(rt_nr_running);
	238	P(rt_throttled);
	239	PN(rt_time);
	240	PN(rt_runtime);
	241
	242	#undef PN
	243	#undef P
	244	}
	245
a48da48b	246	static void print_cpu(struct seq_file *m, int cpu)
43ae34cb	247	{
348ec61e	248	struct rq *rq = cpu_rq(cpu);
43ae34cb IM	249
	250	#ifdef CONFIG_X86
	251	{
	252	unsigned int freq = cpu_khz ? : 1;
	253
	254	SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
	255	cpu, freq / 1000, (freq % 1000));
	256	}
	257	#else
	258	SEQ_printf(m, "\ncpu#%d\n", cpu);
	259	#endif
	260
	261	#define P(x) \
	262	SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
ef83a571 IM	263	#define PN(x) \
ef83a571 IM	264	SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
43ae34cb IM	265
	266	P(nr_running);
	267	SEQ_printf(m, " .%-30s: %lu\n", "load",
495eca49	268	rq->load.weight);
43ae34cb IM	269	P(nr_switches);
	270	P(nr_load_updates);
	271	P(nr_uninterruptible);
ef83a571	272	PN(next_balance);
43ae34cb	273	P(curr->pid);
ef83a571	274	PN(clock);
43ae34cb IM	275	P(cpu_load[0]);
	276	P(cpu_load[1]);
	277	P(cpu_load[2]);
	278	P(cpu_load[3]);
	279	P(cpu_load[4]);
	280	#undef P
ef83a571	281	#undef PN
43ae34cb	282
5ac5c4d6 PZ	283	#ifdef CONFIG_SCHEDSTATS
5ac5c4d6 PZ	284	#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
1b9508f6	285	#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
5ac5c4d6	286
5ac5c4d6 PZ	287	P(yld_count);
	288
	289	P(sched_switch);
	290	P(sched_count);
	291	P(sched_goidle);
1b9508f6 MG	292	#ifdef CONFIG_SMP
	293	P64(avg_idle);
	294	#endif
5ac5c4d6 PZ	295
	296	P(ttwu_count);
	297	P(ttwu_local);
	298
	299	P(bkl_count);
	300
	301	#undef P
	302	#endif
5cef9eca	303	print_cfs_stats(m, cpu);
ada18de2	304	print_rt_stats(m, cpu);
43ae34cb	305
a48da48b	306	print_rq(m, rq, cpu);
43ae34cb IM	307	}
43ae34cb IM	308
1983a922 CE	309	static const char *sched_tunable_scaling_names[] = {
	310	"none",
	311	"logaritmic",
	312	"linear"
	313	};
	314
43ae34cb IM	315	static int sched_debug_show(struct seq_file m, void v)
	316	{
	317	u64 now = ktime_to_ns(ktime_get());
	318	int cpu;
	319
67aa0f76	320	SEQ_printf(m, "Sched Debug Version: v0.09, %s %.*s\n",
43ae34cb IM	321	init_utsname()->release,
	322	(int)strcspn(init_utsname()->version, " "),
	323	init_utsname()->version);
	324
ef83a571	325	SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
43ae34cb	326
1aa4731e	327	#define P(x) \
d822cece	328	SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1aa4731e	329	#define PN(x) \
d822cece	330	SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
af66df5e	331	P(jiffies);
1aa4731e	332	PN(sysctl_sched_latency);
b2be5e96	333	PN(sysctl_sched_min_granularity);
1aa4731e	334	PN(sysctl_sched_wakeup_granularity);
1aa4731e IM	335	PN(sysctl_sched_child_runs_first);
	336	P(sysctl_sched_features);
	337	#undef PN
	338	#undef P
	339
1983a922 CE	340	SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
	341	sysctl_sched_tunable_scaling,
	342	sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
	343
43ae34cb	344	for_each_online_cpu(cpu)
a48da48b	345	print_cpu(m, cpu);
43ae34cb IM	346
	347	SEQ_printf(m, "\n");
	348
	349	return 0;
	350	}
	351
f3373461	352	static void sysrq_sched_debug_show(void)
43ae34cb IM	353	{
	354	sched_debug_show(NULL, NULL);
	355	}
	356
	357	static int sched_debug_open(struct inode inode, struct file filp)
	358	{
	359	return single_open(filp, sched_debug_show, NULL);
	360	}
	361
0dbee3a6	362	static const struct file_operations sched_debug_fops = {
43ae34cb IM	363	.open = sched_debug_open,
	364	.read = seq_read,
	365	.llseek = seq_lseek,
5ea473a1	366	.release = single_release,
43ae34cb IM	367	};
	368
	369	static int __init init_sched_debug_procfs(void)
	370	{
	371	struct proc_dir_entry *pe;
	372
a9cf4ddb	373	pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
43ae34cb IM	374	if (!pe)
43ae34cb IM	375	return -ENOMEM;
43ae34cb IM	376	return 0;
	377	}
	378
	379	__initcall(init_sched_debug_procfs);
	380
	381	void proc_sched_show_task(struct task_struct p, struct seq_file m)
	382	{
cc367732	383	unsigned long nr_switches;
43ae34cb IM	384	unsigned long flags;
	385	int num_threads = 1;
	386
43ae34cb IM	387	if (lock_task_sighand(p, &flags)) {
	388	num_threads = atomic_read(&p->signal->count);
	389	unlock_task_sighand(p, &flags);
	390	}
43ae34cb IM	391
43ae34cb IM	392	SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
2d92f227 IM	393	SEQ_printf(m,
2d92f227 IM	394	"---------------------------------------------------------\n");
cc367732 IM	395	#define __P(F) \
cc367732 IM	396	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
43ae34cb	397	#define P(F) \
2d92f227	398	SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
cc367732 IM	399	#define __PN(F) \
cc367732 IM	400	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
ef83a571	401	#define PN(F) \
2d92f227	402	SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
43ae34cb	403
ef83a571 IM	404	PN(se.exec_start);
	405	PN(se.vruntime);
	406	PN(se.sum_exec_runtime);
6cfb0d5d	407
cc367732 IM	408	nr_switches = p->nvcsw + p->nivcsw;
cc367732 IM	409
6cfb0d5d	410	#ifdef CONFIG_SCHEDSTATS
41acab88 LDM	411	PN(se.statistics.wait_start);
	412	PN(se.statistics.sleep_start);
	413	PN(se.statistics.block_start);
	414	PN(se.statistics.sleep_max);
	415	PN(se.statistics.block_max);
	416	PN(se.statistics.exec_max);
	417	PN(se.statistics.slice_max);
	418	PN(se.statistics.wait_max);
	419	PN(se.statistics.wait_sum);
	420	P(se.statistics.wait_count);
	421	PN(se.statistics.iowait_sum);
	422	P(se.statistics.iowait_count);
2d72376b	423	P(sched_info.bkl_count);
cc367732	424	P(se.nr_migrations);
41acab88 LDM	425	P(se.statistics.nr_migrations_cold);
	426	P(se.statistics.nr_failed_migrations_affine);
	427	P(se.statistics.nr_failed_migrations_running);
	428	P(se.statistics.nr_failed_migrations_hot);
	429	P(se.statistics.nr_forced_migrations);
	430	P(se.statistics.nr_wakeups);
	431	P(se.statistics.nr_wakeups_sync);
	432	P(se.statistics.nr_wakeups_migrate);
	433	P(se.statistics.nr_wakeups_local);
	434	P(se.statistics.nr_wakeups_remote);
	435	P(se.statistics.nr_wakeups_affine);
	436	P(se.statistics.nr_wakeups_affine_attempts);
	437	P(se.statistics.nr_wakeups_passive);
	438	P(se.statistics.nr_wakeups_idle);
cc367732 IM	439
	440	{
	441	u64 avg_atom, avg_per_cpu;
	442
	443	avg_atom = p->se.sum_exec_runtime;
	444	if (nr_switches)
	445	do_div(avg_atom, nr_switches);
	446	else
	447	avg_atom = -1LL;
	448
	449	avg_per_cpu = p->se.sum_exec_runtime;
c1a89740	450	if (p->se.nr_migrations) {
6f6d6a1a RZ	451	avg_per_cpu = div64_u64(avg_per_cpu,
6f6d6a1a RZ	452	p->se.nr_migrations);
c1a89740	453	} else {
cc367732	454	avg_per_cpu = -1LL;
c1a89740	455	}
cc367732 IM	456
	457	__PN(avg_atom);
	458	__PN(avg_per_cpu);
	459	}
6cfb0d5d	460	#endif
cc367732	461	__P(nr_switches);
2d92f227	462	SEQ_printf(m, "%-35s:%21Ld\n",
cc367732 IM	463	"nr_voluntary_switches", (long long)p->nvcsw);
	464	SEQ_printf(m, "%-35s:%21Ld\n",
	465	"nr_involuntary_switches", (long long)p->nivcsw);
	466
43ae34cb IM	467	P(se.load.weight);
	468	P(policy);
	469	P(prio);
ef83a571	470	#undef PN
cc367732 IM	471	#undef __PN
	472	#undef P
	473	#undef __P
43ae34cb IM	474
43ae34cb IM	475	{
29d7b90c	476	unsigned int this_cpu = raw_smp_processor_id();
43ae34cb IM	477	u64 t0, t1;
43ae34cb IM	478
29d7b90c IM	479	t0 = cpu_clock(this_cpu);
29d7b90c IM	480	t1 = cpu_clock(this_cpu);
2d92f227	481	SEQ_printf(m, "%-35s:%21Ld\n",
43ae34cb IM	482	"clock-delta", (long long)(t1-t0));
	483	}
	484	}
	485
	486	void proc_sched_set_task(struct task_struct *p)
	487	{
6cfb0d5d	488	#ifdef CONFIG_SCHEDSTATS
41acab88	489	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
6cfb0d5d	490	#endif
43ae34cb	491	}