a245c1fc6f0a610f17e2d13635306d681e2ef821
[projects/modsched/linux.git] / kernel / sched / cfs / debug.c
1 /*
2  * kernel/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 #include <linux/mempolicy.h>
19
20 #include "sched.h"
21
22 static DEFINE_SPINLOCK(sched_debug_lock);
23
24 /*
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
36 /*
37  * Ease the printing of nsec fields:
38  */
39 static long long nsec_high(unsigned long long nsec)
40 {
41         if ((long long)nsec < 0) {
42                 nsec = -nsec;
43                 do_div(nsec, 1000000);
44                 return -nsec;
45         }
46         do_div(nsec, 1000000);
47
48         return nsec;
49 }
50
51 static unsigned long nsec_low(unsigned long long nsec)
52 {
53         if ((long long)nsec < 0)
54                 nsec = -nsec;
55
56         return do_div(nsec, 1000000);
57 }
58
59 #define SPLIT_NS(x) nsec_high(x), nsec_low(x)
60
61 #ifdef CONFIG_FAIR_GROUP_SCHED
62 static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
63 {
64         struct sched_entity *se = tg->se[cpu];
65
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
71         if (!se) {
72                 struct sched_avg *avg = &cpu_rq(cpu)->avg;
73                 P(avg->runnable_avg_sum);
74                 P(avg->avg_period);
75                 return;
76         }
77
78
79         PN(se->exec_start);
80         PN(se->vruntime);
81         PN(se->sum_exec_runtime);
82 #ifdef CONFIG_SCHEDSTATS
83         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);
93 #endif
94         P(se->load.weight);
95 #ifdef CONFIG_SMP
96         P(se->avg.runnable_avg_sum);
97         P(se->avg.running_avg_sum);
98         P(se->avg.avg_period);
99         P(se->avg.load_avg_contrib);
100         P(se->avg.utilization_avg_contrib);
101         P(se->avg.decay_count);
102 #endif
103 #undef PN
104 #undef P
105 }
106 #endif
107
108 #ifdef CONFIG_CGROUP_SCHED
109 static char group_path[PATH_MAX];
110
111 static char *task_group_path(struct task_group *tg)
112 {
113         if (autogroup_path(tg, group_path, PATH_MAX))
114                 return group_path;
115
116         return cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
117 }
118 #endif
119
120 static void
121 print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
122 {
123         if (rq->curr == p)
124                 SEQ_printf(m, "R");
125         else
126                 SEQ_printf(m, " ");
127
128         SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
129                 p->comm, task_pid_nr(p),
130                 SPLIT_NS(p->se.vruntime),
131                 (long long)(p->nvcsw + p->nivcsw),
132                 p->prio);
133 #ifdef CONFIG_SCHEDSTATS
134         SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
135                 SPLIT_NS(p->se.vruntime),
136                 SPLIT_NS(p->se.sum_exec_runtime),
137                 SPLIT_NS(p->se.statistics.sum_sleep_runtime));
138 #else
139         SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
140                 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
141 #endif
142 #ifdef CONFIG_NUMA_BALANCING
143         SEQ_printf(m, " %d", task_node(p));
144 #endif
145 #ifdef CONFIG_CGROUP_SCHED
146         SEQ_printf(m, " %s", task_group_path(task_group(p)));
147 #endif
148
149         SEQ_printf(m, "\n");
150 }
151
152 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
153 {
154         struct task_struct *g, *p;
155
156         SEQ_printf(m,
157         "\nrunnable tasks:\n"
158         "            task   PID         tree-key  switches  prio"
159         "     exec-runtime         sum-exec        sum-sleep\n"
160         "------------------------------------------------------"
161         "----------------------------------------------------\n");
162
163         rcu_read_lock();
164         for_each_process_thread(g, p) {
165                 if (task_cpu(p) != rq_cpu)
166                         continue;
167
168                 print_task(m, rq, p);
169         }
170         rcu_read_unlock();
171 }
172
173 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
174 {
175         s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
176                 spread, rq0_min_vruntime, spread0;
177         struct rq *rq = cpu_rq(cpu);
178         struct sched_entity *last;
179         unsigned long flags;
180
181 #ifdef CONFIG_FAIR_GROUP_SCHED
182         SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
183 #else
184         SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
185 #endif
186         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
187                         SPLIT_NS(cfs_rq->exec_clock));
188
189         raw_spin_lock_irqsave(&rq->lock, flags);
190         if (cfs_rq->rb_leftmost)
191                 MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
192         last = __pick_last_entity(cfs_rq);
193         if (last)
194                 max_vruntime = last->vruntime;
195         min_vruntime = cfs_rq->min_vruntime;
196         rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
197         raw_spin_unlock_irqrestore(&rq->lock, flags);
198         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));
204         spread = max_vruntime - MIN_vruntime;
205         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "spread",
206                         SPLIT_NS(spread));
207         spread0 = min_vruntime - rq0_min_vruntime;
208         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "spread0",
209                         SPLIT_NS(spread0));
210         SEQ_printf(m, "  .%-30s: %d\n", "nr_spread_over",
211                         cfs_rq->nr_spread_over);
212         SEQ_printf(m, "  .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
213         SEQ_printf(m, "  .%-30s: %ld\n", "load", cfs_rq->load.weight);
214 #ifdef CONFIG_SMP
215         SEQ_printf(m, "  .%-30s: %ld\n", "runnable_load_avg",
216                         cfs_rq->runnable_load_avg);
217         SEQ_printf(m, "  .%-30s: %ld\n", "blocked_load_avg",
218                         cfs_rq->blocked_load_avg);
219         SEQ_printf(m, "  .%-30s: %ld\n", "utilization_load_avg",
220                         cfs_rq->utilization_load_avg);
221 #ifdef CONFIG_FAIR_GROUP_SCHED
222         SEQ_printf(m, "  .%-30s: %ld\n", "tg_load_contrib",
223                         cfs_rq->tg_load_contrib);
224         SEQ_printf(m, "  .%-30s: %d\n", "tg_runnable_contrib",
225                         cfs_rq->tg_runnable_contrib);
226         SEQ_printf(m, "  .%-30s: %ld\n", "tg_load_avg",
227                         atomic_long_read(&cfs_rq->tg->load_avg));
228         SEQ_printf(m, "  .%-30s: %d\n", "tg->runnable_avg",
229                         atomic_read(&cfs_rq->tg->runnable_avg));
230 #endif
231 #endif
232 #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
240
241 #ifdef CONFIG_FAIR_GROUP_SCHED
242         print_cfs_group_stats(m, cpu, cfs_rq->tg);
243 #endif
244 }
245
246 void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
247 {
248 #ifdef CONFIG_RT_GROUP_SCHED
249         SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
250 #else
251         SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
252 #endif
253
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
268 void 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
274 extern __read_mostly int sched_clock_running;
275
276 static void print_cpu(struct seq_file *m, int cpu)
277 {
278         struct rq *rq = cpu_rq(cpu);
279         unsigned long flags;
280
281 #ifdef CONFIG_X86
282         {
283                 unsigned int freq = cpu_khz ? : 1;
284
285                 SEQ_printf(m, "cpu#%d, %u.%03u MHz\n",
286                            cpu, freq / 1000, (freq % 1000));
287         }
288 #else
289         SEQ_printf(m, "cpu#%d\n", cpu);
290 #endif
291
292 #define P(x)                                                            \
293 do {                                                                    \
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
300 #define PN(x) \
301         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
302
303         P(nr_running);
304         SEQ_printf(m, "  .%-30s: %lu\n", "load",
305                    rq->load.weight);
306         P(nr_switches);
307         P(nr_load_updates);
308         P(nr_uninterruptible);
309         PN(next_balance);
310         SEQ_printf(m, "  .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr)));
311         PN(clock);
312         PN(clock_task);
313         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
319 #undef PN
320
321 #ifdef CONFIG_SCHEDSTATS
322 #define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
323 #define P64(n) SEQ_printf(m, "  .%-30s: %Ld\n", #n, rq->n);
324
325         P(yld_count);
326
327         P(sched_count);
328         P(sched_goidle);
329 #ifdef CONFIG_SMP
330         P64(avg_idle);
331         P64(max_idle_balance_cost);
332 #endif
333
334         P(ttwu_count);
335         P(ttwu_local);
336
337 #undef P
338 #undef P64
339 #endif
340         spin_lock_irqsave(&sched_debug_lock, flags);
341         print_cfs_stats(m, cpu);
342         print_rt_stats(m, cpu);
343         print_dl_stats(m, cpu);
344
345         print_rq(m, rq, cpu);
346         spin_unlock_irqrestore(&sched_debug_lock, flags);
347         SEQ_printf(m, "\n");
348 }
349
350 static const char *sched_tunable_scaling_names[] = {
351         "none",
352         "logaritmic",
353         "linear"
354 };
355
356 static void sched_debug_header(struct seq_file *m)
357 {
358         u64 ktime, sched_clk, cpu_clk;
359         unsigned long flags;
360
361         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
367         SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
368                 init_utsname()->release,
369                 (int)strcspn(init_utsname()->version, " "),
370                 init_utsname()->version);
371
372 #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
381         P(sched_clock_stable());
382 #endif
383 #undef PN
384 #undef P
385
386         SEQ_printf(m, "\n");
387         SEQ_printf(m, "sysctl_sched\n");
388
389 #define P(x) \
390         SEQ_printf(m, "  .%-40s: %Ld\n", #x, (long long)(x))
391 #define PN(x) \
392         SEQ_printf(m, "  .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
393         PN(sysctl_sched_latency);
394         PN(sysctl_sched_min_granularity);
395         PN(sysctl_sched_wakeup_granularity);
396         P(sysctl_sched_child_runs_first);
397         P(sysctl_sched_features);
398 #undef PN
399 #undef P
400
401         SEQ_printf(m, "  .%-40s: %d (%s)\n",
402                 "sysctl_sched_tunable_scaling",
403                 sysctl_sched_tunable_scaling,
404                 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
405         SEQ_printf(m, "\n");
406 }
407
408 static 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);
416
417         return 0;
418 }
419
420 void sysrq_sched_debug_show(void)
421 {
422         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  */
437 static 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
458 static 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
464 static void sched_debug_stop(struct seq_file *file, void *data)
465 {
466 }
467
468 static 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
475 static int sched_debug_release(struct inode *inode, struct file *file)
476 {
477         seq_release(inode, file);
478
479         return 0;
480 }
481
482 static int sched_debug_open(struct inode *inode, struct file *filp)
483 {
484         int ret = 0;
485
486         ret = seq_open(filp, &sched_debug_sops);
487
488         return ret;
489 }
490
491 static const struct file_operations sched_debug_fops = {
492         .open           = sched_debug_open,
493         .read           = seq_read,
494         .llseek         = seq_lseek,
495         .release        = sched_debug_release,
496 };
497
498 static int __init init_sched_debug_procfs(void)
499 {
500         struct proc_dir_entry *pe;
501
502         pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops);
503         if (!pe)
504                 return -ENOMEM;
505         return 0;
506 }
507
508 __initcall(init_sched_debug_procfs);
509
510 #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
520 static 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
543                         if (p->numa_faults)
544                                 nr_faults = p->numa_faults[2*node + i];
545
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
551                         SEQ_printf(m, "numa_faults_memory, %d, %d, %d, %d, %ld\n",
552                                 i, node, cpu_current, home_node, nr_faults);
553                 }
554         }
555
556         mpol_put(pol);
557 #endif
558 }
559
560 void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
561 {
562         unsigned long nr_switches;
563
564         SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p),
565                                                 get_nr_threads(p));
566         SEQ_printf(m,
567                 "---------------------------------------------------------"
568                 "----------\n");
569 #define __P(F) \
570         SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
571 #define P(F) \
572         SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
573 #define __PN(F) \
574         SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
575 #define PN(F) \
576         SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
577
578         PN(se.exec_start);
579         PN(se.vruntime);
580         PN(se.sum_exec_runtime);
581
582         nr_switches = p->nvcsw + p->nivcsw;
583
584 #ifdef CONFIG_SCHEDSTATS
585         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);
597         P(se.nr_migrations);
598         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);
612
613         {
614                 u64 avg_atom, avg_per_cpu;
615
616                 avg_atom = p->se.sum_exec_runtime;
617                 if (nr_switches)
618                         avg_atom = div64_ul(avg_atom, nr_switches);
619                 else
620                         avg_atom = -1LL;
621
622                 avg_per_cpu = p->se.sum_exec_runtime;
623                 if (p->se.nr_migrations) {
624                         avg_per_cpu = div64_u64(avg_per_cpu,
625                                                 p->se.nr_migrations);
626                 } else {
627                         avg_per_cpu = -1LL;
628                 }
629
630                 __PN(avg_atom);
631                 __PN(avg_per_cpu);
632         }
633 #endif
634         __P(nr_switches);
635         SEQ_printf(m, "%-45s:%21Ld\n",
636                    "nr_voluntary_switches", (long long)p->nvcsw);
637         SEQ_printf(m, "%-45s:%21Ld\n",
638                    "nr_involuntary_switches", (long long)p->nivcsw);
639
640         P(se.load.weight);
641 #ifdef CONFIG_SMP
642         P(se.avg.runnable_avg_sum);
643         P(se.avg.running_avg_sum);
644         P(se.avg.avg_period);
645         P(se.avg.load_avg_contrib);
646         P(se.avg.utilization_avg_contrib);
647         P(se.avg.decay_count);
648 #endif
649         P(policy);
650         P(prio);
651 #undef PN
652 #undef __PN
653 #undef P
654 #undef __P
655
656         {
657                 unsigned int this_cpu = raw_smp_processor_id();
658                 u64 t0, t1;
659
660                 t0 = cpu_clock(this_cpu);
661                 t1 = cpu_clock(this_cpu);
662                 SEQ_printf(m, "%-45s:%21Ld\n",
663                            "clock-delta", (long long)(t1-t0));
664         }
665
666         sched_show_numa(p, m);
667 }
668
669 void proc_sched_set_task(struct task_struct *p)
670 {
671 #ifdef CONFIG_SCHEDSTATS
672         memset(&p->se.statistics, 0, sizeof(p->se.statistics));
673 #endif
674 }