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Ingo Molnar43ae34c2007-07-09 18:52:00 +02001/*
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
Bharata B Raoefe25c22011-01-11 15:41:54 +053019static DEFINE_SPINLOCK(sched_debug_lock);
20
Ingo Molnar43ae34c2007-07-09 18:52:00 +020021/*
22 * This allows printing both to /proc/sched_debug and
23 * to the console
24 */
25#define SEQ_printf(m, x...) \
26 do { \
27 if (m) \
28 seq_printf(m, x); \
29 else \
30 printk(x); \
31 } while (0)
32
Ingo Molnaref83a572007-10-15 17:00:08 +020033/*
34 * Ease the printing of nsec fields:
35 */
Ingo Molnar90b26282007-12-30 17:24:35 +010036static long long nsec_high(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020037{
Ingo Molnar90b26282007-12-30 17:24:35 +010038 if ((long long)nsec < 0) {
Ingo Molnaref83a572007-10-15 17:00:08 +020039 nsec = -nsec;
40 do_div(nsec, 1000000);
41 return -nsec;
42 }
43 do_div(nsec, 1000000);
44
45 return nsec;
46}
47
Ingo Molnar90b26282007-12-30 17:24:35 +010048static unsigned long nsec_low(unsigned long long nsec)
Ingo Molnaref83a572007-10-15 17:00:08 +020049{
Ingo Molnar90b26282007-12-30 17:24:35 +010050 if ((long long)nsec < 0)
Ingo Molnaref83a572007-10-15 17:00:08 +020051 nsec = -nsec;
52
53 return do_div(nsec, 1000000);
54}
55
56#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
57
Bharata B Raoff9b48c2008-11-10 21:34:09 +053058#ifdef CONFIG_FAIR_GROUP_SCHED
Mike Galbraith5091faa2010-11-30 14:18:03 +010059static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
Bharata B Raoff9b48c2008-11-10 21:34:09 +053060{
61 struct sched_entity *se = tg->se[cpu];
62 if (!se)
63 return;
64
65#define P(F) \
66 SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
67#define PN(F) \
68 SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
69
70 PN(se->exec_start);
71 PN(se->vruntime);
72 PN(se->sum_exec_runtime);
73#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -030074 PN(se->statistics.wait_start);
75 PN(se->statistics.sleep_start);
76 PN(se->statistics.block_start);
77 PN(se->statistics.sleep_max);
78 PN(se->statistics.block_max);
79 PN(se->statistics.exec_max);
80 PN(se->statistics.slice_max);
81 PN(se->statistics.wait_max);
82 PN(se->statistics.wait_sum);
83 P(se->statistics.wait_count);
Bharata B Raoff9b48c2008-11-10 21:34:09 +053084#endif
85 P(se->load.weight);
86#undef PN
87#undef P
88}
89#endif
90
Bharata B Raoefe25c22011-01-11 15:41:54 +053091#ifdef CONFIG_CGROUP_SCHED
92static char group_path[PATH_MAX];
93
94static char *task_group_path(struct task_group *tg)
95{
Bharata B Rao8ecedd72011-01-11 15:42:57 +053096 if (autogroup_path(tg, group_path, PATH_MAX))
97 return group_path;
98
Bharata B Raoefe25c22011-01-11 15:41:54 +053099 /*
100 * May be NULL if the underlying cgroup isn't fully-created yet
101 */
102 if (!tg->css.cgroup) {
103 group_path[0] = '\0';
104 return group_path;
105 }
106 cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
107 return group_path;
108}
109#endif
110
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200111static void
Ingo Molnara48da482007-08-09 11:16:51 +0200112print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200113{
114 if (rq->curr == p)
115 SEQ_printf(m, "R");
116 else
117 SEQ_printf(m, " ");
118
Ingo Molnaref83a572007-10-15 17:00:08 +0200119 SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200120 p->comm, p->pid,
Ingo Molnaref83a572007-10-15 17:00:08 +0200121 SPLIT_NS(p->se.vruntime),
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200122 (long long)(p->nvcsw + p->nivcsw),
Al Viro6f605d82007-08-06 04:26:59 +0100123 p->prio);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200124#ifdef CONFIG_SCHEDSTATS
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200125 SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200126 SPLIT_NS(p->se.vruntime),
127 SPLIT_NS(p->se.sum_exec_runtime),
Lucas De Marchi41acab82010-03-10 23:37:45 -0300128 SPLIT_NS(p->se.statistics.sum_sleep_runtime));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200129#else
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200130 SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
Ingo Molnaref83a572007-10-15 17:00:08 +0200131 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200132#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530133#ifdef CONFIG_CGROUP_SCHED
134 SEQ_printf(m, " %s", task_group_path(task_group(p)));
135#endif
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200136
Peter Zijlstrad19ca302008-04-19 19:45:00 +0200137 SEQ_printf(m, "\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200138}
139
Ingo Molnara48da482007-08-09 11:16:51 +0200140static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200141{
142 struct task_struct *g, *p;
Peter Zijlstraab63a632007-10-25 14:02:45 +0200143 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200144
145 SEQ_printf(m,
146 "\nrunnable tasks:\n"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200147 " task PID tree-key switches prio"
148 " exec-runtime sum-exec sum-sleep\n"
Ingo Molnar1a75b942007-10-15 17:00:08 +0200149 "------------------------------------------------------"
Mike Galbraithc86da3a2007-10-15 17:00:08 +0200150 "----------------------------------------------------\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200151
Peter Zijlstraab63a632007-10-25 14:02:45 +0200152 read_lock_irqsave(&tasklist_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200153
154 do_each_thread(g, p) {
Peter Zijlstrafd2f4412011-04-05 17:23:44 +0200155 if (!p->on_rq || task_cpu(p) != rq_cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200156 continue;
157
Ingo Molnara48da482007-08-09 11:16:51 +0200158 print_task(m, rq, p);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200159 } while_each_thread(g, p);
160
Peter Zijlstraab63a632007-10-25 14:02:45 +0200161 read_unlock_irqrestore(&tasklist_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200162}
163
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200164void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200165{
Ingo Molnar86d95602007-10-15 17:00:06 +0200166 s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
167 spread, rq0_min_vruntime, spread0;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900168 struct rq *rq = cpu_rq(cpu);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200169 struct sched_entity *last;
170 unsigned long flags;
171
Bharata B Raoefe25c22011-01-11 15:41:54 +0530172#ifdef CONFIG_FAIR_GROUP_SCHED
173 SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
174#else
Peter Zijlstraada18de2008-06-19 14:22:24 +0200175 SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530176#endif
Ingo Molnaref83a572007-10-15 17:00:08 +0200177 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
178 SPLIT_NS(cfs_rq->exec_clock));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200179
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100180 raw_spin_lock_irqsave(&rq->lock, flags);
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200181 if (cfs_rq->rb_leftmost)
Rik van Rielac53db52011-02-01 09:51:03 -0500182 MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200183 last = __pick_last_entity(cfs_rq);
184 if (last)
185 max_vruntime = last->vruntime;
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100186 min_vruntime = cfs_rq->min_vruntime;
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900187 rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
Thomas Gleixner05fa7852009-11-17 14:28:38 +0100188 raw_spin_unlock_irqrestore(&rq->lock, flags);
Ingo Molnaref83a572007-10-15 17:00:08 +0200189 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
190 SPLIT_NS(MIN_vruntime));
191 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
192 SPLIT_NS(min_vruntime));
193 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
194 SPLIT_NS(max_vruntime));
Ingo Molnar67e12ea2007-10-15 17:00:05 +0200195 spread = max_vruntime - MIN_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200196 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
197 SPLIT_NS(spread));
Ingo Molnar86d95602007-10-15 17:00:06 +0200198 spread0 = min_vruntime - rq0_min_vruntime;
Ingo Molnaref83a572007-10-15 17:00:08 +0200199 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
200 SPLIT_NS(spread0));
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100201 SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
Peter Zijlstraddc97292007-10-15 17:00:10 +0200202 cfs_rq->nr_spread_over);
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800203 SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
204 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200205#ifdef CONFIG_FAIR_GROUP_SCHED
206#ifdef CONFIG_SMP
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800207 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_avg",
208 SPLIT_NS(cfs_rq->load_avg));
209 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "load_period",
210 SPLIT_NS(cfs_rq->load_period));
211 SEQ_printf(m, " .%-30s: %ld\n", "load_contrib",
212 cfs_rq->load_contribution);
213 SEQ_printf(m, " .%-30s: %d\n", "load_tg",
Mike Galbraith5091faa2010-11-30 14:18:03 +0100214 atomic_read(&cfs_rq->tg->load_weight));
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200215#endif
Peter Zijlstra2069dd72010-11-15 15:47:00 -0800216
Bharata B Raoff9b48c2008-11-10 21:34:09 +0530217 print_cfs_group_stats(m, cpu, cfs_rq->tg);
Peter Zijlstrac09595f2008-06-27 13:41:14 +0200218#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200219}
220
Peter Zijlstraada18de2008-06-19 14:22:24 +0200221void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
222{
Bharata B Raoefe25c22011-01-11 15:41:54 +0530223#ifdef CONFIG_RT_GROUP_SCHED
224 SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
225#else
Peter Zijlstraada18de2008-06-19 14:22:24 +0200226 SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530227#endif
Peter Zijlstraada18de2008-06-19 14:22:24 +0200228
229#define P(x) \
230 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
231#define PN(x) \
232 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
233
234 P(rt_nr_running);
235 P(rt_throttled);
236 PN(rt_time);
237 PN(rt_runtime);
238
239#undef PN
240#undef P
241}
242
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100243extern __read_mostly int sched_clock_running;
244
Ingo Molnara48da482007-08-09 11:16:51 +0200245static void print_cpu(struct seq_file *m, int cpu)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200246{
Hitoshi Mitake348ec612009-06-17 22:20:55 +0900247 struct rq *rq = cpu_rq(cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530248 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200249
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))
Ingo Molnaref83a572007-10-15 17:00:08 +0200263#define PN(x) \
264 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200265
266 P(nr_running);
267 SEQ_printf(m, " .%-30s: %lu\n", "load",
Dmitry Adamushko495eca42007-10-15 17:00:06 +0200268 rq->load.weight);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200269 P(nr_switches);
270 P(nr_load_updates);
271 P(nr_uninterruptible);
Ingo Molnaref83a572007-10-15 17:00:08 +0200272 PN(next_balance);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200273 P(curr->pid);
Ingo Molnaref83a572007-10-15 17:00:08 +0200274 PN(clock);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200275 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
Ingo Molnaref83a572007-10-15 17:00:08 +0200281#undef PN
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200282
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100283#ifdef CONFIG_SCHEDSTATS
284#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100285#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100286
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100287 P(yld_count);
288
289 P(sched_switch);
290 P(sched_count);
291 P(sched_goidle);
Mike Galbraith1b9508f2009-11-04 17:53:50 +0100292#ifdef CONFIG_SMP
293 P64(avg_idle);
294#endif
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100295
296 P(ttwu_count);
297 P(ttwu_local);
298
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100299#undef P
Yong Zhangfce20972011-01-14 15:57:39 +0800300#undef P64
Peter Zijlstra5ac5c4d2008-11-10 10:46:32 +0100301#endif
Bharata B Raoefe25c22011-01-11 15:41:54 +0530302 spin_lock_irqsave(&sched_debug_lock, flags);
Ingo Molnar5cef9ec2007-08-09 11:16:47 +0200303 print_cfs_stats(m, cpu);
Peter Zijlstraada18de2008-06-19 14:22:24 +0200304 print_rt_stats(m, cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200305
Bharata B Raoefe25c22011-01-11 15:41:54 +0530306 rcu_read_lock();
Ingo Molnara48da482007-08-09 11:16:51 +0200307 print_rq(m, rq, cpu);
Bharata B Raoefe25c22011-01-11 15:41:54 +0530308 rcu_read_unlock();
309 spin_unlock_irqrestore(&sched_debug_lock, flags);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200310}
311
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100312static const char *sched_tunable_scaling_names[] = {
313 "none",
314 "logaritmic",
315 "linear"
316};
317
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200318static int sched_debug_show(struct seq_file *m, void *v)
319{
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100320 u64 ktime, sched_clk, cpu_clk;
321 unsigned long flags;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200322 int cpu;
323
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100324 local_irq_save(flags);
325 ktime = ktime_to_ns(ktime_get());
326 sched_clk = sched_clock();
327 cpu_clk = local_clock();
328 local_irq_restore(flags);
329
330 SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200331 init_utsname()->release,
332 (int)strcspn(init_utsname()->version, " "),
333 init_utsname()->version);
334
Peter Zijlstra5bb6b1e2010-11-19 21:11:09 +0100335#define P(x) \
336 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
337#define PN(x) \
338 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
339 PN(ktime);
340 PN(sched_clk);
341 PN(cpu_clk);
342 P(jiffies);
343#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
344 P(sched_clock_stable);
345#endif
346#undef PN
347#undef P
348
349 SEQ_printf(m, "\n");
350 SEQ_printf(m, "sysctl_sched\n");
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200351
Ingo Molnar1aa47312007-10-15 17:00:10 +0200352#define P(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200353 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200354#define PN(x) \
Ingo Molnard822cec2007-10-15 17:00:10 +0200355 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
Ingo Molnar1aa47312007-10-15 17:00:10 +0200356 PN(sysctl_sched_latency);
Peter Zijlstrab2be5e92007-11-09 22:39:37 +0100357 PN(sysctl_sched_min_granularity);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200358 PN(sysctl_sched_wakeup_granularity);
Josh Hunteebef742010-07-19 12:31:16 -0700359 P(sysctl_sched_child_runs_first);
Ingo Molnar1aa47312007-10-15 17:00:10 +0200360 P(sysctl_sched_features);
361#undef PN
362#undef P
363
Christian Ehrhardt1983a922009-11-30 12:16:47 +0100364 SEQ_printf(m, " .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
365 sysctl_sched_tunable_scaling,
366 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
367
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200368 for_each_online_cpu(cpu)
Ingo Molnara48da482007-08-09 11:16:51 +0200369 print_cpu(m, cpu);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200370
371 SEQ_printf(m, "\n");
372
373 return 0;
374}
375
Josh Triplettf33734612007-07-26 13:40:43 +0200376static void sysrq_sched_debug_show(void)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200377{
378 sched_debug_show(NULL, NULL);
379}
380
381static int sched_debug_open(struct inode *inode, struct file *filp)
382{
383 return single_open(filp, sched_debug_show, NULL);
384}
385
Arjan van de Ven0dbee3a2007-10-15 17:00:19 +0200386static const struct file_operations sched_debug_fops = {
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200387 .open = sched_debug_open,
388 .read = seq_read,
389 .llseek = seq_lseek,
Alexey Dobriyan5ea473a2007-07-31 00:38:50 -0700390 .release = single_release,
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200391};
392
393static int __init init_sched_debug_procfs(void)
394{
395 struct proc_dir_entry *pe;
396
Li Zefana9cf4dd2008-10-30 15:23:34 +0800397 pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200398 if (!pe)
399 return -ENOMEM;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200400 return 0;
401}
402
403__initcall(init_sched_debug_procfs);
404
405void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
406{
Ingo Molnarcc367732007-10-15 17:00:18 +0200407 unsigned long nr_switches;
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200408
Oleg Nesterov5089a972010-05-26 14:43:22 -0700409 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid,
410 get_nr_threads(p));
Ingo Molnar2d92f222007-10-15 17:00:18 +0200411 SEQ_printf(m,
412 "---------------------------------------------------------\n");
Ingo Molnarcc367732007-10-15 17:00:18 +0200413#define __P(F) \
414 SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200415#define P(F) \
Ingo Molnar2d92f222007-10-15 17:00:18 +0200416 SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
Ingo Molnarcc367732007-10-15 17:00:18 +0200417#define __PN(F) \
418 SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
Ingo Molnaref83a572007-10-15 17:00:08 +0200419#define PN(F) \
Ingo Molnar2d92f222007-10-15 17:00:18 +0200420 SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200421
Ingo Molnaref83a572007-10-15 17:00:08 +0200422 PN(se.exec_start);
423 PN(se.vruntime);
424 PN(se.sum_exec_runtime);
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200425
Ingo Molnarcc367732007-10-15 17:00:18 +0200426 nr_switches = p->nvcsw + p->nivcsw;
427
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200428#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300429 PN(se.statistics.wait_start);
430 PN(se.statistics.sleep_start);
431 PN(se.statistics.block_start);
432 PN(se.statistics.sleep_max);
433 PN(se.statistics.block_max);
434 PN(se.statistics.exec_max);
435 PN(se.statistics.slice_max);
436 PN(se.statistics.wait_max);
437 PN(se.statistics.wait_sum);
438 P(se.statistics.wait_count);
439 PN(se.statistics.iowait_sum);
440 P(se.statistics.iowait_count);
Ingo Molnarcc367732007-10-15 17:00:18 +0200441 P(se.nr_migrations);
Lucas De Marchi41acab82010-03-10 23:37:45 -0300442 P(se.statistics.nr_migrations_cold);
443 P(se.statistics.nr_failed_migrations_affine);
444 P(se.statistics.nr_failed_migrations_running);
445 P(se.statistics.nr_failed_migrations_hot);
446 P(se.statistics.nr_forced_migrations);
447 P(se.statistics.nr_wakeups);
448 P(se.statistics.nr_wakeups_sync);
449 P(se.statistics.nr_wakeups_migrate);
450 P(se.statistics.nr_wakeups_local);
451 P(se.statistics.nr_wakeups_remote);
452 P(se.statistics.nr_wakeups_affine);
453 P(se.statistics.nr_wakeups_affine_attempts);
454 P(se.statistics.nr_wakeups_passive);
455 P(se.statistics.nr_wakeups_idle);
Ingo Molnarcc367732007-10-15 17:00:18 +0200456
457 {
458 u64 avg_atom, avg_per_cpu;
459
460 avg_atom = p->se.sum_exec_runtime;
461 if (nr_switches)
462 do_div(avg_atom, nr_switches);
463 else
464 avg_atom = -1LL;
465
466 avg_per_cpu = p->se.sum_exec_runtime;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100467 if (p->se.nr_migrations) {
Roman Zippel6f6d6a12008-05-01 04:34:28 -0700468 avg_per_cpu = div64_u64(avg_per_cpu,
469 p->se.nr_migrations);
Ingo Molnarc1a89742007-11-28 15:52:56 +0100470 } else {
Ingo Molnarcc367732007-10-15 17:00:18 +0200471 avg_per_cpu = -1LL;
Ingo Molnarc1a89742007-11-28 15:52:56 +0100472 }
Ingo Molnarcc367732007-10-15 17:00:18 +0200473
474 __PN(avg_atom);
475 __PN(avg_per_cpu);
476 }
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200477#endif
Ingo Molnarcc367732007-10-15 17:00:18 +0200478 __P(nr_switches);
Ingo Molnar2d92f222007-10-15 17:00:18 +0200479 SEQ_printf(m, "%-35s:%21Ld\n",
Ingo Molnarcc367732007-10-15 17:00:18 +0200480 "nr_voluntary_switches", (long long)p->nvcsw);
481 SEQ_printf(m, "%-35s:%21Ld\n",
482 "nr_involuntary_switches", (long long)p->nivcsw);
483
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200484 P(se.load.weight);
485 P(policy);
486 P(prio);
Ingo Molnaref83a572007-10-15 17:00:08 +0200487#undef PN
Ingo Molnarcc367732007-10-15 17:00:18 +0200488#undef __PN
489#undef P
490#undef __P
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200491
492 {
Ingo Molnar29d7b902008-11-16 08:07:15 +0100493 unsigned int this_cpu = raw_smp_processor_id();
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200494 u64 t0, t1;
495
Ingo Molnar29d7b902008-11-16 08:07:15 +0100496 t0 = cpu_clock(this_cpu);
497 t1 = cpu_clock(this_cpu);
Ingo Molnar2d92f222007-10-15 17:00:18 +0200498 SEQ_printf(m, "%-35s:%21Ld\n",
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200499 "clock-delta", (long long)(t1-t0));
500 }
501}
502
503void proc_sched_set_task(struct task_struct *p)
504{
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200505#ifdef CONFIG_SCHEDSTATS
Lucas De Marchi41acab82010-03-10 23:37:45 -0300506 memset(&p->se.statistics, 0, sizeof(p->se.statistics));
Ingo Molnar6cfb0d52007-08-02 17:41:40 +0200507#endif
Ingo Molnar43ae34c2007-07-09 18:52:00 +0200508}