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Ingo Molnar43ae34c2007-07-09 18:52:00 +02001/*
Peter Zijlstra391e43d2011-11-15 17:14:39 +01002 * kernel/sched/debug.c
Ingo Molnar43ae34c2007-07-09 18:52:00 +02003 *
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>
Ingo Molnarb32e86b2013-10-07 11:29:30 +010018#include <linux/mempolicy.h>
Ingo Molnar43ae34c2007-07-09 18:52:00 +020019
Peter Zijlstra029632f2011-10-25 10:00:11 +020020#include "sched.h"
21
Bharata B Raoefe25c22011-01-11 15:41:54 +053022static DEFINE_SPINLOCK(sched_debug_lock);
23
Ingo Molnar43ae34c2007-07-09 18:52:00 +020024/*
25 * This allows printing both to /proc/sched_debug and
26 * to the console
27 */
28#define SEQ_printf(m, x...) \
29 do { \
30 if (m) \
31 seq_printf(m, x); \
32 else \
33 printk(x); \
34 } while (0)
35
Ingo Molnaref83a572007-10-15 17:00:08 +020036/*
37 * Ease the printing of nsec fields:
38 */
Ingo Molnar90b26282007-12-30 17:24:35 +010039static long long nsec_high(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020040{
Ingo Molnar90b26282007-12-30 17:24:35 +010041 if ((long long)nsec < 0) {
Ingo Molnaref83a572007-10-15 17:00:08 +020042 nsec = -nsec;
43 do_div(nsec, 1000000);
44 return -nsec;
45 }
46 do_div(nsec, 1000000);
47
48 return nsec;
49}
50
Ingo Molnar90b26282007-12-30 17:24:35 +010051static unsigned long nsec_low(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020052{
Ingo Molnar90b26282007-12-30 17:24:35 +010053 if ((long long)nsec < 0)
Ingo Molnaref83a572007-10-15 17:00:08 +020054 nsec = -nsec;
55
56 return do_div(nsec, 1000000);
57}
58
59#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
60
Bharata B Raoff9b48c2008-11-10 21:34:09 +053061#ifdef CONFIG_FAIR_GROUP_SCHED
Mike Galbraith5091faa2010-11-30 14:18:03 +010062static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
Bharata B Raoff9b48c2008-11-10 21:34:09 +053063{
64 struct sched_entity *se = tg->se[cpu];
Bharata B Raoff9b48c2008-11-10 21:34:09 +053065
66#define P(F) \
67 SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
68#define PN(F) \
69 SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
70
Ben Segall18bf2802012-10-04 12:51:20 +020071 if (!se) {
72 struct sched_avg *avg = &cpu_rq(cpu)->avg;
73 P(avg->runnable_avg_sum);
Vincent Guittot36ee28e2015-02-27 16:54:04 +010074 P(avg->avg_period);
Ben Segall18bf2802012-10-04 12:51:20 +020075 return;
76 }
77
78
Bharata B Raoff9b48c2008-11-10 21:34:09 +053079 PN(se->exec_start);
80 PN(se->vruntime);
81 PN(se->sum_exec_runtime);
82#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -030083 PN(se->statistics.wait_start);
84 PN(se->statistics.sleep_start);
85 PN(se->statistics.block_start);
86 PN(se->statistics.sleep_max);
87 PN(se->statistics.block_max);
88 PN(se->statistics.exec_max);
89 PN(se->statistics.slice_max);
90 PN(se->statistics.wait_max);
91 PN(se->statistics.wait_sum);
92 P(se->statistics.wait_count);
Bharata B Raoff9b48c2008-11-10 21:34:09 +053093#endif
94 P(se->load.weight);
Paul Turner9d85f212012-10-04 13:18:29 +020095#ifdef CONFIG_SMP
96 P(se->avg.runnable_avg_sum);
Morten Rasmussen21f44862015-02-27 16:54:05 +010097 P(se->avg.running_avg_sum);
Vincent Guittot36ee28e2015-02-27 16:54:04 +010098 P(se->avg.avg_period);
Paul Turner2dac7542012-10-04 13:18:30 +020099 P(se->avg.load_avg_contrib);
Morten Rasmussen21f44862015-02-27 16:54:05 +0100100 P(se->avg.utilization_avg_contrib);
Paul Turner9ee474f2012-10-04 13:18:30 +0200101 P(se->avg.decay_count);
Paul Turner9d85f212012-10-04 13:18:29 +0200102#endif
Bharata B Raoff9b48c2008-11-10 21:34:09 +0530103#undef PN
104#undef P
105}
106#endif
107
Bharata B Raoefe25c22011-01-11 15:41:54 +0530108#ifdef CONFIG_CGROUP_SCHED
109static char group_path[PATH_MAX];
110
111static char *task_group_path(struct task_group *tg)
112{
Bharata B Rao8ecedd72011-01-11 15:42:57 +0530113 if (autogroup_path(tg, group_path, PATH_MAX))
114 return group_path;
115
Tejun Heoe61734c2014-02-12 09:29:50 -0500116 return cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530117}
118#endif
119
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200120static void
Ingo Molnara48da482007-08-09 11:16:51 +0200121print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200122{
123 if (rq->curr == p)
124 SEQ_printf(m, "R");
125 else
126 SEQ_printf(m, " ");
127
Ingo Molnaref83a572007-10-15 17:00:08 +0200128 SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
Peter Zijlstrafc840912013-09-09 13:01:41 +0200129 p->comm, task_pid_nr(p),
Ingo Molnaref83a572007-10-15 17:00:08 +0200130 SPLIT_NS(p->se.vruntime),
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200131 (long long)(p->nvcsw + p->nivcsw),
Al Viro6f605d82007-08-06 04:26:59 +0100132 p->prio);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200133#ifdef CONFIG_SCHEDSTATS
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200134 SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200135 SPLIT_NS(p->se.vruntime),
136 SPLIT_NS(p->se.sum_exec_runtime),
Lucas De Marchi41acab82010-03-10 23:37:45 -0300137 SPLIT_NS(p->se.statistics.sum_sleep_runtime));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200138#else
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200139 SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200140 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200141#endif
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100142#ifdef CONFIG_NUMA_BALANCING
Wanpeng Lide1b3012013-12-12 15:23:24 +0800143 SEQ_printf(m, " %d", task_node(p));
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100144#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530145#ifdef CONFIG_CGROUP_SCHED
146 SEQ_printf(m, " %s", task_group_path(task_group(p)));
147#endif
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200148
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200149 SEQ_printf(m, "\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200150}
151
Ingo Molnara48da482007-08-09 11:16:51 +0200152static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200153{
154 struct task_struct *g, *p;
155
156 SEQ_printf(m,
157 "\nrunnable tasks:\n"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200158 " task PID tree-key switches prio"
159 " exec-runtime sum-exec sum-sleep\n"
Ingo Molnar1a75b942007-10-15 17:00:08 +0200160 "------------------------------------------------------"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200161 "----------------------------------------------------\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200162
Oleg Nesterov5bd96ab2014-09-21 21:33:41 +0200163 rcu_read_lock();
Oleg Nesterovd38e83c2014-08-13 21:19:56 +0200164 for_each_process_thread(g, p) {
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100165 if (task_cpu(p) != rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200166 continue;
167
Ingo Molnara48da482007-08-09 11:16:51 +0200168 print_task(m, rq, p);
Oleg Nesterovd38e83c2014-08-13 21:19:56 +0200169 }
Oleg Nesterov5bd96ab2014-09-21 21:33:41 +0200170 rcu_read_unlock();
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200171}
172
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200173void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200174{
Ingo Molnar86d95602007-10-15 17:00:06 +0200175 s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
176 spread, rq0_min_vruntime, spread0;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900177 struct rq *rq = cpu_rq(cpu);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200178 struct sched_entity *last;
179 unsigned long flags;
180
Bharata B Raoefe25c22011-01-11 15:41:54 +0530181#ifdef CONFIG_FAIR_GROUP_SCHED
182 SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
183#else
Peter Zijlstraada18de2008-06-19 14:22:24 +0200184 SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530185#endif
Ingo Molnaref83a572007-10-15 17:00:08 +0200186 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
187 SPLIT_NS(cfs_rq->exec_clock));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200188
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100189 raw_spin_lock_irqsave(&rq->lock, flags);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200190 if (cfs_rq->rb_leftmost)
Rik van Rielac53db52011-02-01 09:51:03 -0500191 MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200192 last = __pick_last_entity(cfs_rq);
193 if (last)
194 max_vruntime = last->vruntime;
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100195 min_vruntime = cfs_rq->min_vruntime;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900196 rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100197 raw_spin_unlock_irqrestore(&rq->lock, flags);
Ingo Molnaref83a572007-10-15 17:00:08 +0200198 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
199 SPLIT_NS(MIN_vruntime));
200 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
201 SPLIT_NS(min_vruntime));
202 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
203 SPLIT_NS(max_vruntime));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200204 spread = max_vruntime - MIN_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200205 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
206 SPLIT_NS(spread));
Ingo Molnar86d95602007-10-15 17:00:06 +0200207 spread0 = min_vruntime - rq0_min_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200208 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
209 SPLIT_NS(spread0));
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100210 SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
Peter Zijlstraddc97292007-10-15 17:00:10 +0200211 cfs_rq->nr_spread_over);
Peter Zijlstrac82513e2012-04-26 13:12:27 +0200212 SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800213 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200214#ifdef CONFIG_SMP
Alex Shi72a4cf22013-06-20 10:18:53 +0800215 SEQ_printf(m, " .%-30s: %ld\n", "runnable_load_avg",
Paul Turner2dac7542012-10-04 13:18:30 +0200216 cfs_rq->runnable_load_avg);
Alex Shi72a4cf22013-06-20 10:18:53 +0800217 SEQ_printf(m, " .%-30s: %ld\n", "blocked_load_avg",
Paul Turner9ee474f2012-10-04 13:18:30 +0200218 cfs_rq->blocked_load_avg);
Vincent Guittot36ee28e2015-02-27 16:54:04 +0100219 SEQ_printf(m, " .%-30s: %ld\n", "utilization_load_avg",
220 cfs_rq->utilization_load_avg);
Alex Shi333bb862013-06-28 19:10:35 +0800221#ifdef CONFIG_FAIR_GROUP_SCHED
Alex Shibf5b9862013-06-20 10:18:54 +0800222 SEQ_printf(m, " .%-30s: %ld\n", "tg_load_contrib",
Paul Turnerc566e8e2012-10-04 13:18:30 +0200223 cfs_rq->tg_load_contrib);
Paul Turnerbb17f652012-10-04 13:18:31 +0200224 SEQ_printf(m, " .%-30s: %d\n", "tg_runnable_contrib",
225 cfs_rq->tg_runnable_contrib);
Alex Shi333bb862013-06-28 19:10:35 +0800226 SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg",
227 atomic_long_read(&cfs_rq->tg->load_avg));
Paul Turnerbb17f652012-10-04 13:18:31 +0200228 SEQ_printf(m, " .%-30s: %d\n", "tg->runnable_avg",
229 atomic_read(&cfs_rq->tg->runnable_avg));
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200230#endif
Alex Shi333bb862013-06-28 19:10:35 +0800231#endif
Ben Segallf9f9ffc2013-10-16 11:16:32 -0700232#ifdef CONFIG_CFS_BANDWIDTH
233 SEQ_printf(m, " .%-30s: %d\n", "tg->cfs_bandwidth.timer_active",
234 cfs_rq->tg->cfs_bandwidth.timer_active);
235 SEQ_printf(m, " .%-30s: %d\n", "throttled",
236 cfs_rq->throttled);
237 SEQ_printf(m, " .%-30s: %d\n", "throttle_count",
238 cfs_rq->throttle_count);
239#endif
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800240
Alex Shi333bb862013-06-28 19:10:35 +0800241#ifdef CONFIG_FAIR_GROUP_SCHED
Bharata B Raoff9b48c2008-11-10 21:34:09 +0530242 print_cfs_group_stats(m, cpu, cfs_rq->tg);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200243#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200244}
245
Peter Zijlstraada18de2008-06-19 14:22:24 +0200246void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
247{
Bharata B Raoefe25c22011-01-11 15:41:54 +0530248#ifdef CONFIG_RT_GROUP_SCHED
249 SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
250#else
Peter Zijlstraada18de2008-06-19 14:22:24 +0200251 SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530252#endif
Peter Zijlstraada18de2008-06-19 14:22:24 +0200253
254#define P(x) \
255 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
256#define PN(x) \
257 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
258
259 P(rt_nr_running);
260 P(rt_throttled);
261 PN(rt_time);
262 PN(rt_runtime);
263
264#undef PN
265#undef P
266}
267
Wanpeng Liacb32132014-10-31 06:39:33 +0800268void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq)
269{
270 SEQ_printf(m, "\ndl_rq[%d]:\n", cpu);
271 SEQ_printf(m, " .%-30s: %ld\n", "dl_nr_running", dl_rq->dl_nr_running);
272}
273
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100274extern __read_mostly int sched_clock_running;
275
Ingo Molnara48da482007-08-09 11:16:51 +0200276static void print_cpu(struct seq_file *m, int cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200277{
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900278 struct rq *rq = cpu_rq(cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530279 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200280
281#ifdef CONFIG_X86
282 {
283 unsigned int freq = cpu_khz ? : 1;
284
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800285 SEQ_printf(m, "cpu#%d, %u.%03u MHz\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200286 cpu, freq / 1000, (freq % 1000));
287 }
288#else
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800289 SEQ_printf(m, "cpu#%d\n", cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200290#endif
291
Peter Zijlstra13e099d2012-05-14 14:34:00 +0200292#define P(x) \
293do { \
294 if (sizeof(rq->x) == 4) \
295 SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \
296 else \
297 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
298} while (0)
299
Ingo Molnaref83a572007-10-15 17:00:08 +0200300#define PN(x) \
301 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200302
303 P(nr_running);
304 SEQ_printf(m, " .%-30s: %lu\n", "load",
Dmitry Adamushko495eca42007-10-15 17:00:06 +0200305 rq->load.weight);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200306 P(nr_switches);
307 P(nr_load_updates);
308 P(nr_uninterruptible);
Ingo Molnaref83a572007-10-15 17:00:08 +0200309 PN(next_balance);
Peter Zijlstrafc840912013-09-09 13:01:41 +0200310 SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr)));
Ingo Molnaref83a572007-10-15 17:00:08 +0200311 PN(clock);
Peter Zijlstra5a537592015-01-05 11:18:12 +0100312 PN(clock_task);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200313 P(cpu_load[0]);
314 P(cpu_load[1]);
315 P(cpu_load[2]);
316 P(cpu_load[3]);
317 P(cpu_load[4]);
318#undef P
Ingo Molnaref83a572007-10-15 17:00:08 +0200319#undef PN
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200320
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100321#ifdef CONFIG_SCHEDSTATS
322#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100323#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100324
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100325 P(yld_count);
326
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100327 P(sched_count);
328 P(sched_goidle);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100329#ifdef CONFIG_SMP
330 P64(avg_idle);
Alex Shi37e6bae2014-01-23 18:39:54 +0800331 P64(max_idle_balance_cost);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100332#endif
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100333
334 P(ttwu_count);
335 P(ttwu_local);
336
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100337#undef P
Yong Zhangfce20972011-01-14 15:57:39 +0800338#undef P64
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100339#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530340 spin_lock_irqsave(&sched_debug_lock, flags);
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200341 print_cfs_stats(m, cpu);
Peter Zijlstraada18de2008-06-19 14:22:24 +0200342 print_rt_stats(m, cpu);
Wanpeng Liacb32132014-10-31 06:39:33 +0800343 print_dl_stats(m, cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200344
Ingo Molnara48da482007-08-09 11:16:51 +0200345 print_rq(m, rq, cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530346 spin_unlock_irqrestore(&sched_debug_lock, flags);
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800347 SEQ_printf(m, "\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200348}
349
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100350static const char *sched_tunable_scaling_names[] = {
351 "none",
352 "logaritmic",
353 "linear"
354};
355
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800356static void sched_debug_header(struct seq_file *m)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200357{
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100358 u64 ktime, sched_clk, cpu_clk;
359 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200360
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100361 local_irq_save(flags);
362 ktime = ktime_to_ns(ktime_get());
363 sched_clk = sched_clock();
364 cpu_clk = local_clock();
365 local_irq_restore(flags);
366
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100367 SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200368 init_utsname()->release,
369 (int)strcspn(init_utsname()->version, " "),
370 init_utsname()->version);
371
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100372#define P(x) \
373 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
374#define PN(x) \
375 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
376 PN(ktime);
377 PN(sched_clk);
378 PN(cpu_clk);
379 P(jiffies);
380#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
Peter Zijlstra35af99e2013-11-28 19:38:42 +0100381 P(sched_clock_stable());
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100382#endif
383#undef PN
384#undef P
385
386 SEQ_printf(m, "\n");
387 SEQ_printf(m, "sysctl_sched\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200388
Ingo Molnar1aa47312007-10-15 17:00:10 +0200389#define P(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200390 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200391#define PN(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200392 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200393 PN(sysctl_sched_latency);
Peter Zijlstrab2be5e92007-11-09 22:39:37 +0100394 PN(sysctl_sched_min_granularity);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200395 PN(sysctl_sched_wakeup_granularity);
Josh Hunteebef742010-07-19 12:31:16 -0700396 P(sysctl_sched_child_runs_first);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200397 P(sysctl_sched_features);
398#undef PN
399#undef P
400
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800401 SEQ_printf(m, " .%-40s: %d (%s)\n",
402 "sysctl_sched_tunable_scaling",
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100403 sysctl_sched_tunable_scaling,
404 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200405 SEQ_printf(m, "\n");
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800406}
407
408static int sched_debug_show(struct seq_file *m, void *v)
409{
410 int cpu = (unsigned long)(v - 2);
411
412 if (cpu != -1)
413 print_cpu(m, cpu);
414 else
415 sched_debug_header(m);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200416
417 return 0;
418}
419
Peter Zijlstra029632f2011-10-25 10:00:11 +0200420void sysrq_sched_debug_show(void)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200421{
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800422 int cpu;
423
424 sched_debug_header(NULL);
425 for_each_online_cpu(cpu)
426 print_cpu(NULL, cpu);
427
428}
429
430/*
431 * This itererator needs some explanation.
432 * It returns 1 for the header position.
433 * This means 2 is cpu 0.
434 * In a hotplugged system some cpus, including cpu 0, may be missing so we have
435 * to use cpumask_* to iterate over the cpus.
436 */
437static void *sched_debug_start(struct seq_file *file, loff_t *offset)
438{
439 unsigned long n = *offset;
440
441 if (n == 0)
442 return (void *) 1;
443
444 n--;
445
446 if (n > 0)
447 n = cpumask_next(n - 1, cpu_online_mask);
448 else
449 n = cpumask_first(cpu_online_mask);
450
451 *offset = n + 1;
452
453 if (n < nr_cpu_ids)
454 return (void *)(unsigned long)(n + 2);
455 return NULL;
456}
457
458static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset)
459{
460 (*offset)++;
461 return sched_debug_start(file, offset);
462}
463
464static void sched_debug_stop(struct seq_file *file, void *data)
465{
466}
467
468static const struct seq_operations sched_debug_sops = {
469 .start = sched_debug_start,
470 .next = sched_debug_next,
471 .stop = sched_debug_stop,
472 .show = sched_debug_show,
473};
474
475static int sched_debug_release(struct inode *inode, struct file *file)
476{
477 seq_release(inode, file);
478
479 return 0;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200480}
481
482static int sched_debug_open(struct inode *inode, struct file *filp)
483{
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800484 int ret = 0;
485
486 ret = seq_open(filp, &sched_debug_sops);
487
488 return ret;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200489}
490
Arjan van de Ven0dbee3a2007-10-15 17:00:19 +0200491static const struct file_operations sched_debug_fops = {
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200492 .open = sched_debug_open,
493 .read = seq_read,
494 .llseek = seq_lseek,
Nathan Zimmerbbbfeac2013-02-21 15:15:09 -0800495 .release = sched_debug_release,
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200496};
497
498static int __init init_sched_debug_procfs(void)
499{
500 struct proc_dir_entry *pe;
501
Li Zefana9cf4dd2008-10-30 15:23:34 +0800502 pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200503 if (!pe)
504 return -ENOMEM;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200505 return 0;
506}
507
508__initcall(init_sched_debug_procfs);
509
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100510#define __P(F) \
511 SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
512#define P(F) \
513 SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
514#define __PN(F) \
515 SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
516#define PN(F) \
517 SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
518
519
520static void sched_show_numa(struct task_struct *p, struct seq_file *m)
521{
522#ifdef CONFIG_NUMA_BALANCING
523 struct mempolicy *pol;
524 int node, i;
525
526 if (p->mm)
527 P(mm->numa_scan_seq);
528
529 task_lock(p);
530 pol = p->mempolicy;
531 if (pol && !(pol->flags & MPOL_F_MORON))
532 pol = NULL;
533 mpol_get(pol);
534 task_unlock(p);
535
536 SEQ_printf(m, "numa_migrations, %ld\n", xchg(&p->numa_pages_migrated, 0));
537
538 for_each_online_node(node) {
539 for (i = 0; i < 2; i++) {
540 unsigned long nr_faults = -1;
541 int cpu_current, home_node;
542
Iulia Manda44dba3d2014-10-31 02:13:31 +0200543 if (p->numa_faults)
544 nr_faults = p->numa_faults[2*node + i];
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100545
546 cpu_current = !i ? (task_node(p) == node) :
547 (pol && node_isset(node, pol->v.nodes));
548
549 home_node = (p->numa_preferred_nid == node);
550
Rik van Rielff1df892014-01-27 17:03:41 -0500551 SEQ_printf(m, "numa_faults_memory, %d, %d, %d, %d, %ld\n",
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100552 i, node, cpu_current, home_node, nr_faults);
553 }
554 }
555
556 mpol_put(pol);
557#endif
558}
559
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200560void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
561{
Ingo Molnarcc367732007-10-15 17:00:18 +0200562 unsigned long nr_switches;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200563
Peter Zijlstrafc840912013-09-09 13:01:41 +0200564 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p),
Oleg Nesterov5089a972010-05-26 14:43:22 -0700565 get_nr_threads(p));
Ingo Molnar2d92f222007-10-15 17:00:18 +0200566 SEQ_printf(m,
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530567 "---------------------------------------------------------"
568 "----------\n");
Ingo Molnarcc367732007-10-15 17:00:18 +0200569#define __P(F) \
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530570 SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200571#define P(F) \
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530572 SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
Ingo Molnarcc367732007-10-15 17:00:18 +0200573#define __PN(F) \
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530574 SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
Ingo Molnaref83a572007-10-15 17:00:08 +0200575#define PN(F) \
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530576 SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200577
Ingo Molnaref83a572007-10-15 17:00:08 +0200578 PN(se.exec_start);
579 PN(se.vruntime);
580 PN(se.sum_exec_runtime);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200581
Ingo Molnarcc367732007-10-15 17:00:18 +0200582 nr_switches = p->nvcsw + p->nivcsw;
583
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200584#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300585 PN(se.statistics.wait_start);
586 PN(se.statistics.sleep_start);
587 PN(se.statistics.block_start);
588 PN(se.statistics.sleep_max);
589 PN(se.statistics.block_max);
590 PN(se.statistics.exec_max);
591 PN(se.statistics.slice_max);
592 PN(se.statistics.wait_max);
593 PN(se.statistics.wait_sum);
594 P(se.statistics.wait_count);
595 PN(se.statistics.iowait_sum);
596 P(se.statistics.iowait_count);
Ingo Molnarcc367732007-10-15 17:00:18 +0200597 P(se.nr_migrations);
Lucas De Marchi41acab82010-03-10 23:37:45 -0300598 P(se.statistics.nr_migrations_cold);
599 P(se.statistics.nr_failed_migrations_affine);
600 P(se.statistics.nr_failed_migrations_running);
601 P(se.statistics.nr_failed_migrations_hot);
602 P(se.statistics.nr_forced_migrations);
603 P(se.statistics.nr_wakeups);
604 P(se.statistics.nr_wakeups_sync);
605 P(se.statistics.nr_wakeups_migrate);
606 P(se.statistics.nr_wakeups_local);
607 P(se.statistics.nr_wakeups_remote);
608 P(se.statistics.nr_wakeups_affine);
609 P(se.statistics.nr_wakeups_affine_attempts);
610 P(se.statistics.nr_wakeups_passive);
611 P(se.statistics.nr_wakeups_idle);
Ingo Molnarcc367732007-10-15 17:00:18 +0200612
613 {
614 u64 avg_atom, avg_per_cpu;
615
616 avg_atom = p->se.sum_exec_runtime;
617 if (nr_switches)
Mateusz Guzikb0ab99e2014-06-14 15:00:09 +0200618 avg_atom = div64_ul(avg_atom, nr_switches);
Ingo Molnarcc367732007-10-15 17:00:18 +0200619 else
620 avg_atom = -1LL;
621
622 avg_per_cpu = p->se.sum_exec_runtime;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100623 if (p->se.nr_migrations) {
Roman Zippel6f6d6a12008-05-01 04:34:28 -0700624 avg_per_cpu = div64_u64(avg_per_cpu,
625 p->se.nr_migrations);
Ingo Molnarc1a89742007-11-28 15:52:56 +0100626 } else {
Ingo Molnarcc367732007-10-15 17:00:18 +0200627 avg_per_cpu = -1LL;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100628 }
Ingo Molnarcc367732007-10-15 17:00:18 +0200629
630 __PN(avg_atom);
631 __PN(avg_per_cpu);
632 }
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200633#endif
Ingo Molnarcc367732007-10-15 17:00:18 +0200634 __P(nr_switches);
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530635 SEQ_printf(m, "%-45s:%21Ld\n",
Ingo Molnarcc367732007-10-15 17:00:18 +0200636 "nr_voluntary_switches", (long long)p->nvcsw);
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530637 SEQ_printf(m, "%-45s:%21Ld\n",
Ingo Molnarcc367732007-10-15 17:00:18 +0200638 "nr_involuntary_switches", (long long)p->nivcsw);
639
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200640 P(se.load.weight);
Alex Shi333bb862013-06-28 19:10:35 +0800641#ifdef CONFIG_SMP
Kamalesh Babulal939fd732013-06-25 13:33:36 +0530642 P(se.avg.runnable_avg_sum);
Vincent Guittot36ee28e2015-02-27 16:54:04 +0100643 P(se.avg.running_avg_sum);
644 P(se.avg.avg_period);
Kamalesh Babulal939fd732013-06-25 13:33:36 +0530645 P(se.avg.load_avg_contrib);
Vincent Guittot36ee28e2015-02-27 16:54:04 +0100646 P(se.avg.utilization_avg_contrib);
Kamalesh Babulal939fd732013-06-25 13:33:36 +0530647 P(se.avg.decay_count);
648#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200649 P(policy);
650 P(prio);
Ingo Molnaref83a572007-10-15 17:00:08 +0200651#undef PN
Ingo Molnarcc367732007-10-15 17:00:18 +0200652#undef __PN
653#undef P
654#undef __P
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200655
656 {
Ingo Molnar29d7b902008-11-16 08:07:15 +0100657 unsigned int this_cpu = raw_smp_processor_id();
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200658 u64 t0, t1;
659
Ingo Molnar29d7b902008-11-16 08:07:15 +0100660 t0 = cpu_clock(this_cpu);
661 t1 = cpu_clock(this_cpu);
Kamalesh Babulaladd332a2013-06-27 22:20:05 +0530662 SEQ_printf(m, "%-45s:%21Ld\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200663 "clock-delta", (long long)(t1-t0));
664 }
Ingo Molnarb32e86b2013-10-07 11:29:30 +0100665
666 sched_show_numa(p, m);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200667}
668
669void proc_sched_set_task(struct task_struct *p)
670{
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200671#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300672 memset(&p->se.statistics, 0, sizeof(p->se.statistics));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200673#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200674}