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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>
18
Peter Zijlstra029632f2011-10-25 10:00:11 +020019#include "sched.h"
20
Bharata B Raoefe25c22011-01-11 15:41:54 +053021static DEFINE_SPINLOCK(sched_debug_lock);
22
Ingo Molnar43ae34c2007-07-09 18:52:00 +020023/*
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
Ingo Molnaref83a572007-10-15 17:00:08 +020035/*
36 * Ease the printing of nsec fields:
37 */
Ingo Molnar90b26282007-12-30 17:24:35 +010038static long long nsec_high(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020039{
Ingo Molnar90b26282007-12-30 17:24:35 +010040 if ((long long)nsec < 0) {
Ingo Molnaref83a572007-10-15 17:00:08 +020041 nsec = -nsec;
42 do_div(nsec, 1000000);
43 return -nsec;
44 }
45 do_div(nsec, 1000000);
46
47 return nsec;
48}
49
Ingo Molnar90b26282007-12-30 17:24:35 +010050static unsigned long nsec_low(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020051{
Ingo Molnar90b26282007-12-30 17:24:35 +010052 if ((long long)nsec < 0)
Ingo Molnaref83a572007-10-15 17:00:08 +020053 nsec = -nsec;
54
55 return do_div(nsec, 1000000);
56}
57
58#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
59
Bharata B Raoff9b48c2008-11-10 21:34:09 +053060#ifdef CONFIG_FAIR_GROUP_SCHED
Mike Galbraith5091faa2010-11-30 14:18:03 +010061static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
Bharata B Raoff9b48c2008-11-10 21:34:09 +053062{
63 struct sched_entity *se = tg->se[cpu];
64 if (!se)
65 return;
66
67#define P(F) \
68 SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
69#define PN(F) \
70 SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
71
72 PN(se->exec_start);
73 PN(se->vruntime);
74 PN(se->sum_exec_runtime);
75#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -030076 PN(se->statistics.wait_start);
77 PN(se->statistics.sleep_start);
78 PN(se->statistics.block_start);
79 PN(se->statistics.sleep_max);
80 PN(se->statistics.block_max);
81 PN(se->statistics.exec_max);
82 PN(se->statistics.slice_max);
83 PN(se->statistics.wait_max);
84 PN(se->statistics.wait_sum);
85 P(se->statistics.wait_count);
Bharata B Raoff9b48c2008-11-10 21:34:09 +053086#endif
87 P(se->load.weight);
88#undef PN
89#undef P
90}
91#endif
92
Bharata B Raoefe25c22011-01-11 15:41:54 +053093#ifdef CONFIG_CGROUP_SCHED
94static char group_path[PATH_MAX];
95
96static char *task_group_path(struct task_group *tg)
97{
Bharata B Rao8ecedd72011-01-11 15:42:57 +053098 if (autogroup_path(tg, group_path, PATH_MAX))
99 return group_path;
100
Bharata B Raoefe25c22011-01-11 15:41:54 +0530101 /*
102 * May be NULL if the underlying cgroup isn't fully-created yet
103 */
104 if (!tg->css.cgroup) {
105 group_path[0] = '\0';
106 return group_path;
107 }
108 cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
109 return group_path;
110}
111#endif
112
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200113static void
Ingo Molnara48da482007-08-09 11:16:51 +0200114print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200115{
116 if (rq->curr == p)
117 SEQ_printf(m, "R");
118 else
119 SEQ_printf(m, " ");
120
Ingo Molnaref83a572007-10-15 17:00:08 +0200121 SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200122 p->comm, p->pid,
Ingo Molnaref83a572007-10-15 17:00:08 +0200123 SPLIT_NS(p->se.vruntime),
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200124 (long long)(p->nvcsw + p->nivcsw),
Al Viro6f605d82007-08-06 04:26:59 +0100125 p->prio);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200126#ifdef CONFIG_SCHEDSTATS
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200127 SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200128 SPLIT_NS(p->se.vruntime),
129 SPLIT_NS(p->se.sum_exec_runtime),
Lucas De Marchi41acab82010-03-10 23:37:45 -0300130 SPLIT_NS(p->se.statistics.sum_sleep_runtime));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200131#else
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200132 SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200133 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200134#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530135#ifdef CONFIG_CGROUP_SCHED
136 SEQ_printf(m, " %s", task_group_path(task_group(p)));
137#endif
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200138
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200139 SEQ_printf(m, "\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200140}
141
Ingo Molnara48da482007-08-09 11:16:51 +0200142static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200143{
144 struct task_struct *g, *p;
Peter Zijlstraab63a632007-10-25 14:02:45 +0200145 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200146
147 SEQ_printf(m,
148 "\nrunnable tasks:\n"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200149 " task PID tree-key switches prio"
150 " exec-runtime sum-exec sum-sleep\n"
Ingo Molnar1a75b942007-10-15 17:00:08 +0200151 "------------------------------------------------------"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200152 "----------------------------------------------------\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200153
Peter Zijlstraab63a632007-10-25 14:02:45 +0200154 read_lock_irqsave(&tasklist_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200155
156 do_each_thread(g, p) {
Peter Zijlstrafd2f4412011-04-05 17:23:44 +0200157 if (!p->on_rq || task_cpu(p) != rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200158 continue;
159
Ingo Molnara48da482007-08-09 11:16:51 +0200160 print_task(m, rq, p);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200161 } while_each_thread(g, p);
162
Peter Zijlstraab63a632007-10-25 14:02:45 +0200163 read_unlock_irqrestore(&tasklist_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200164}
165
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200166void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200167{
Ingo Molnar86d95602007-10-15 17:00:06 +0200168 s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
169 spread, rq0_min_vruntime, spread0;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900170 struct rq *rq = cpu_rq(cpu);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200171 struct sched_entity *last;
172 unsigned long flags;
173
Bharata B Raoefe25c22011-01-11 15:41:54 +0530174#ifdef CONFIG_FAIR_GROUP_SCHED
175 SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
176#else
Peter Zijlstraada18de22008-06-19 14:22:24 +0200177 SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530178#endif
Ingo Molnaref83a572007-10-15 17:00:08 +0200179 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
180 SPLIT_NS(cfs_rq->exec_clock));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200181
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100182 raw_spin_lock_irqsave(&rq->lock, flags);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200183 if (cfs_rq->rb_leftmost)
Rik van Rielac53db52011-02-01 09:51:03 -0500184 MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200185 last = __pick_last_entity(cfs_rq);
186 if (last)
187 max_vruntime = last->vruntime;
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100188 min_vruntime = cfs_rq->min_vruntime;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900189 rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100190 raw_spin_unlock_irqrestore(&rq->lock, flags);
Ingo Molnaref83a572007-10-15 17:00:08 +0200191 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
192 SPLIT_NS(MIN_vruntime));
193 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
194 SPLIT_NS(min_vruntime));
195 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
196 SPLIT_NS(max_vruntime));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200197 spread = max_vruntime - MIN_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200198 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
199 SPLIT_NS(spread));
Ingo Molnar86d95602007-10-15 17:00:06 +0200200 spread0 = min_vruntime - rq0_min_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200201 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
202 SPLIT_NS(spread0));
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100203 SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
Peter Zijlstraddc97292007-10-15 17:00:10 +0200204 cfs_rq->nr_spread_over);
Peter Zijlstrac82513e2012-04-26 13:12:27 +0200205 SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800206 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200207#ifdef CONFIG_FAIR_GROUP_SCHED
208#ifdef CONFIG_SMP
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800209 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
210 SPLIT_NS(cfs_rq->load_avg));
211 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
212 SPLIT_NS(cfs_rq->load_period));
213 SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
214 cfs_rq->load_contribution);
215 SEQ_printf(m, " .%-30s: %d\n", "load_tg",
Mike Galbraith5091faa2010-11-30 14:18:03 +0100216 atomic_read(&cfs_rq->tg->load_weight));
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200217#endif
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800218
Bharata B Raoff9b48c2008-11-10 21:34:09 +0530219 print_cfs_group_stats(m, cpu, cfs_rq->tg);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200220#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200221}
222
Peter Zijlstraada18de22008-06-19 14:22:24 +0200223void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
224{
Bharata B Raoefe25c22011-01-11 15:41:54 +0530225#ifdef CONFIG_RT_GROUP_SCHED
226 SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
227#else
Peter Zijlstraada18de22008-06-19 14:22:24 +0200228 SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530229#endif
Peter Zijlstraada18de22008-06-19 14:22:24 +0200230
231#define P(x) \
232 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
233#define PN(x) \
234 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
235
236 P(rt_nr_running);
237 P(rt_throttled);
238 PN(rt_time);
239 PN(rt_runtime);
240
241#undef PN
242#undef P
243}
244
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100245extern __read_mostly int sched_clock_running;
246
Ingo Molnara48da482007-08-09 11:16:51 +0200247static void print_cpu(struct seq_file *m, int cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200248{
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900249 struct rq *rq = cpu_rq(cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530250 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200251
252#ifdef CONFIG_X86
253 {
254 unsigned int freq = cpu_khz ? : 1;
255
256 SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
257 cpu, freq / 1000, (freq % 1000));
258 }
259#else
260 SEQ_printf(m, "\ncpu#%d\n", cpu);
261#endif
262
Peter Zijlstra13e099d2012-05-14 14:34:00 +0200263#define P(x) \
264do { \
265 if (sizeof(rq->x) == 4) \
266 SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \
267 else \
268 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
269} while (0)
270
Ingo Molnaref83a572007-10-15 17:00:08 +0200271#define PN(x) \
272 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200273
274 P(nr_running);
275 SEQ_printf(m, " .%-30s: %lu\n", "load",
Dmitry Adamushko495eca42007-10-15 17:00:06 +0200276 rq->load.weight);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200277 P(nr_switches);
278 P(nr_load_updates);
279 P(nr_uninterruptible);
Ingo Molnaref83a572007-10-15 17:00:08 +0200280 PN(next_balance);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200281 P(curr->pid);
Ingo Molnaref83a572007-10-15 17:00:08 +0200282 PN(clock);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200283 P(cpu_load[0]);
284 P(cpu_load[1]);
285 P(cpu_load[2]);
286 P(cpu_load[3]);
287 P(cpu_load[4]);
288#undef P
Ingo Molnaref83a572007-10-15 17:00:08 +0200289#undef PN
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200290
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100291#ifdef CONFIG_SCHEDSTATS
292#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100293#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100294
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100295 P(yld_count);
296
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100297 P(sched_count);
298 P(sched_goidle);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100299#ifdef CONFIG_SMP
300 P64(avg_idle);
301#endif
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100302
303 P(ttwu_count);
304 P(ttwu_local);
305
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100306#undef P
Yong Zhangfce20972011-01-14 15:57:39 +0800307#undef P64
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100308#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530309 spin_lock_irqsave(&sched_debug_lock, flags);
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200310 print_cfs_stats(m, cpu);
Peter Zijlstraada18de22008-06-19 14:22:24 +0200311 print_rt_stats(m, cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200312
Bharata B Raoefe25c22011-01-11 15:41:54 +0530313 rcu_read_lock();
Ingo Molnara48da482007-08-09 11:16:51 +0200314 print_rq(m, rq, cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530315 rcu_read_unlock();
316 spin_unlock_irqrestore(&sched_debug_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200317}
318
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100319static const char *sched_tunable_scaling_names[] = {
320 "none",
321 "logaritmic",
322 "linear"
323};
324
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200325static int sched_debug_show(struct seq_file *m, void *v)
326{
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100327 u64 ktime, sched_clk, cpu_clk;
328 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200329 int cpu;
330
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100331 local_irq_save(flags);
332 ktime = ktime_to_ns(ktime_get());
333 sched_clk = sched_clock();
334 cpu_clk = local_clock();
335 local_irq_restore(flags);
336
337 SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200338 init_utsname()->release,
339 (int)strcspn(init_utsname()->version, " "),
340 init_utsname()->version);
341
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100342#define P(x) \
343 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
344#define PN(x) \
345 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
346 PN(ktime);
347 PN(sched_clk);
348 PN(cpu_clk);
349 P(jiffies);
350#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
351 P(sched_clock_stable);
352#endif
353#undef PN
354#undef P
355
356 SEQ_printf(m, "\n");
357 SEQ_printf(m, "sysctl_sched\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200358
Ingo Molnar1aa47312007-10-15 17:00:10 +0200359#define P(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200360 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200361#define PN(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200362 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200363 PN(sysctl_sched_latency);
Peter Zijlstrab2be5e92007-11-09 22:39:37 +0100364 PN(sysctl_sched_min_granularity);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200365 PN(sysctl_sched_wakeup_granularity);
Josh Hunteebef742010-07-19 12:31:16 -0700366 P(sysctl_sched_child_runs_first);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200367 P(sysctl_sched_features);
368#undef PN
369#undef P
370
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100371 SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
372 sysctl_sched_tunable_scaling,
373 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
374
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200375 for_each_online_cpu(cpu)
Ingo Molnara48da482007-08-09 11:16:51 +0200376 print_cpu(m, cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200377
378 SEQ_printf(m, "\n");
379
380 return 0;
381}
382
Peter Zijlstra029632f2011-10-25 10:00:11 +0200383void sysrq_sched_debug_show(void)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200384{
385 sched_debug_show(NULL, NULL);
386}
387
388static int sched_debug_open(struct inode *inode, struct file *filp)
389{
390 return single_open(filp, sched_debug_show, NULL);
391}
392
Arjan van de Ven0dbee3a2007-10-15 17:00:19 +0200393static const struct file_operations sched_debug_fops = {
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200394 .open = sched_debug_open,
395 .read = seq_read,
396 .llseek = seq_lseek,
Alexey Dobriyan5ea473a2007-07-31 00:38:50 -0700397 .release = single_release,
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200398};
399
400static int __init init_sched_debug_procfs(void)
401{
402 struct proc_dir_entry *pe;
403
Li Zefana9cf4dd2008-10-30 15:23:34 +0800404 pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200405 if (!pe)
406 return -ENOMEM;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200407 return 0;
408}
409
410__initcall(init_sched_debug_procfs);
411
412void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
413{
Ingo Molnarcc367732007-10-15 17:00:18 +0200414 unsigned long nr_switches;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200415
Oleg Nesterov5089a972010-05-26 14:43:22 -0700416 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
417 get_nr_threads(p));
Ingo Molnar2d92f222007-10-15 17:00:18 +0200418 SEQ_printf(m,
419 "---------------------------------------------------------\n");
Ingo Molnarcc367732007-10-15 17:00:18 +0200420#define __P(F) \
421 SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200422#define P(F) \
Ingo Molnar2d92f222007-10-15 17:00:18 +0200423 SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
Ingo Molnarcc367732007-10-15 17:00:18 +0200424#define __PN(F) \
425 SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
Ingo Molnaref83a572007-10-15 17:00:08 +0200426#define PN(F) \
Ingo Molnar2d92f222007-10-15 17:00:18 +0200427 SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200428
Ingo Molnaref83a572007-10-15 17:00:08 +0200429 PN(se.exec_start);
430 PN(se.vruntime);
431 PN(se.sum_exec_runtime);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200432
Ingo Molnarcc367732007-10-15 17:00:18 +0200433 nr_switches = p->nvcsw + p->nivcsw;
434
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200435#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300436 PN(se.statistics.wait_start);
437 PN(se.statistics.sleep_start);
438 PN(se.statistics.block_start);
439 PN(se.statistics.sleep_max);
440 PN(se.statistics.block_max);
441 PN(se.statistics.exec_max);
442 PN(se.statistics.slice_max);
443 PN(se.statistics.wait_max);
444 PN(se.statistics.wait_sum);
445 P(se.statistics.wait_count);
446 PN(se.statistics.iowait_sum);
447 P(se.statistics.iowait_count);
Ingo Molnarcc367732007-10-15 17:00:18 +0200448 P(se.nr_migrations);
Lucas De Marchi41acab82010-03-10 23:37:45 -0300449 P(se.statistics.nr_migrations_cold);
450 P(se.statistics.nr_failed_migrations_affine);
451 P(se.statistics.nr_failed_migrations_running);
452 P(se.statistics.nr_failed_migrations_hot);
453 P(se.statistics.nr_forced_migrations);
454 P(se.statistics.nr_wakeups);
455 P(se.statistics.nr_wakeups_sync);
456 P(se.statistics.nr_wakeups_migrate);
457 P(se.statistics.nr_wakeups_local);
458 P(se.statistics.nr_wakeups_remote);
459 P(se.statistics.nr_wakeups_affine);
460 P(se.statistics.nr_wakeups_affine_attempts);
461 P(se.statistics.nr_wakeups_passive);
462 P(se.statistics.nr_wakeups_idle);
Ingo Molnarcc367732007-10-15 17:00:18 +0200463
464 {
465 u64 avg_atom, avg_per_cpu;
466
467 avg_atom = p->se.sum_exec_runtime;
468 if (nr_switches)
469 do_div(avg_atom, nr_switches);
470 else
471 avg_atom = -1LL;
472
473 avg_per_cpu = p->se.sum_exec_runtime;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100474 if (p->se.nr_migrations) {
Roman Zippel6f6d6a12008-05-01 04:34:28 -0700475 avg_per_cpu = div64_u64(avg_per_cpu,
476 p->se.nr_migrations);
Ingo Molnarc1a89742007-11-28 15:52:56 +0100477 } else {
Ingo Molnarcc367732007-10-15 17:00:18 +0200478 avg_per_cpu = -1LL;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100479 }
Ingo Molnarcc367732007-10-15 17:00:18 +0200480
481 __PN(avg_atom);
482 __PN(avg_per_cpu);
483 }
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200484#endif
Ingo Molnarcc367732007-10-15 17:00:18 +0200485 __P(nr_switches);
Ingo Molnar2d92f222007-10-15 17:00:18 +0200486 SEQ_printf(m, "%-35s:%21Ld\n",
Ingo Molnarcc367732007-10-15 17:00:18 +0200487 "nr_voluntary_switches", (long long)p->nvcsw);
488 SEQ_printf(m, "%-35s:%21Ld\n",
489 "nr_involuntary_switches", (long long)p->nivcsw);
490
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200491 P(se.load.weight);
492 P(policy);
493 P(prio);
Ingo Molnaref83a572007-10-15 17:00:08 +0200494#undef PN
Ingo Molnarcc367732007-10-15 17:00:18 +0200495#undef __PN
496#undef P
497#undef __P
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200498
499 {
Ingo Molnar29d7b902008-11-16 08:07:15 +0100500 unsigned int this_cpu = raw_smp_processor_id();
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200501 u64 t0, t1;
502
Ingo Molnar29d7b902008-11-16 08:07:15 +0100503 t0 = cpu_clock(this_cpu);
504 t1 = cpu_clock(this_cpu);
Ingo Molnar2d92f222007-10-15 17:00:18 +0200505 SEQ_printf(m, "%-35s:%21Ld\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200506 "clock-delta", (long long)(t1-t0));
507 }
508}
509
510void proc_sched_set_task(struct task_struct *p)
511{
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200512#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300513 memset(&p->se.statistics, 0, sizeof(p->se.statistics));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200514#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200515}