projects/linux·blob v7.1 · refs

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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * kernel/sched/debug.c
4 *
5 * Print the CFS rbtree and other debugging details
6 *
7 * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar
8 */
9#include <linux/debugfs.h>
10#include <linux/nmi.h>
11#include <linux/log2.h>
12#include "sched.h"
13
14/*
15 * This allows printing both to /sys/kernel/debug/sched/debug and
16 * to the console
17 */
18#define SEQ_printf(m, x...) \
19 do { \
20 if (m) \
21 seq_printf(m, x); \
22 else \
23 pr_cont(x); \
24 } while (0)
25
26/*
27 * Ease the printing of nsec fields:
28 */
29static long long nsec_high(unsigned long long nsec)
30{
31 if ((long long)nsec < 0) {
32 nsec = -nsec;
33 do_div(nsec, 1000000);
34 return -nsec;
35 }
36 do_div(nsec, 1000000);
37
38 return nsec;
39}
40
41static unsigned long nsec_low(unsigned long long nsec)
42{
43 if ((long long)nsec < 0)
44 nsec = -nsec;
45
46 return do_div(nsec, 1000000);
47}
48
49#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
50
51#define SCHED_FEAT(name, enabled) \
52 #name ,
53
54static const char * const sched_feat_names[] = {
55#include "features.h"
56};
57
58#undef SCHED_FEAT
59
60static int sched_feat_show(struct seq_file *m, void *v)
61{
62 int i;
63
64 for (i = 0; i < __SCHED_FEAT_NR; i++) {
65 if (!(sysctl_sched_features & (1UL << i)))
66 seq_puts(m, "NO_");
67 seq_printf(m, "%s ", sched_feat_names[i]);
68 }
69 seq_puts(m, "\n");
70
71 return 0;
72}
73
74#ifdef CONFIG_JUMP_LABEL
75
76#define jump_label_key__true STATIC_KEY_INIT_TRUE
77#define jump_label_key__false STATIC_KEY_INIT_FALSE
78
79#define SCHED_FEAT(name, enabled) \
80 jump_label_key__##enabled ,
81
82struct static_key sched_feat_keys[__SCHED_FEAT_NR] = {
83#include "features.h"
84};
85
86#undef SCHED_FEAT
87
88static void sched_feat_disable(int i)
89{
90 static_key_disable_cpuslocked(&sched_feat_keys[i]);
91}
92
93static void sched_feat_enable(int i)
94{
95 static_key_enable_cpuslocked(&sched_feat_keys[i]);
96}
97#else /* !CONFIG_JUMP_LABEL: */
98static void sched_feat_disable(int i) { };
99static void sched_feat_enable(int i) { };
100#endif /* !CONFIG_JUMP_LABEL */
101
102static int sched_feat_set(char *cmp)
103{
104 int i;
105 int neg = 0;
106
107 if (strncmp(cmp, "NO_", 3) == 0) {
108 neg = 1;
109 cmp += 3;
110 }
111
112 i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp);
113 if (i < 0)
114 return i;
115
116 if (neg) {
117 sysctl_sched_features &= ~(1UL << i);
118 sched_feat_disable(i);
119 } else {
120 sysctl_sched_features |= (1UL << i);
121 sched_feat_enable(i);
122 }
123
124 return 0;
125}
126
127static ssize_t
128sched_feat_write(struct file *filp, const char __user *ubuf,
129 size_t cnt, loff_t *ppos)
130{
131 char buf[64];
132 char *cmp;
133 int ret;
134 struct inode *inode;
135
136 if (cnt > 63)
137 cnt = 63;
138
139 if (copy_from_user(&buf, ubuf, cnt))
140 return -EFAULT;
141
142 buf[cnt] = 0;
143 cmp = strstrip(buf);
144
145 /* Ensure the static_key remains in a consistent state */
146 inode = file_inode(filp);
147 cpus_read_lock();
148 inode_lock(inode);
149 ret = sched_feat_set(cmp);
150 inode_unlock(inode);
151 cpus_read_unlock();
152 if (ret < 0)
153 return ret;
154
155 *ppos += cnt;
156
157 return cnt;
158}
159
160static int sched_feat_open(struct inode *inode, struct file *filp)
161{
162 return single_open(filp, sched_feat_show, NULL);
163}
164
165static const struct file_operations sched_feat_fops = {
166 .open = sched_feat_open,
167 .write = sched_feat_write,
168 .read = seq_read,
169 .llseek = seq_lseek,
170 .release = single_release,
171};
172
173static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
174 size_t cnt, loff_t *ppos)
175{
176 unsigned int scaling;
177 int ret;
178
179 ret = kstrtouint_from_user(ubuf, cnt, 10, &scaling);
180 if (ret)
181 return ret;
182
183 if (scaling >= SCHED_TUNABLESCALING_END)
184 return -EINVAL;
185
186 sysctl_sched_tunable_scaling = scaling;
187 if (sched_update_scaling())
188 return -EINVAL;
189
190 *ppos += cnt;
191 return cnt;
192}
193
194static int sched_scaling_show(struct seq_file *m, void *v)
195{
196 seq_printf(m, "%d\n", sysctl_sched_tunable_scaling);
197 return 0;
198}
199
200static int sched_scaling_open(struct inode *inode, struct file *filp)
201{
202 return single_open(filp, sched_scaling_show, NULL);
203}
204
205static const struct file_operations sched_scaling_fops = {
206 .open = sched_scaling_open,
207 .write = sched_scaling_write,
208 .read = seq_read,
209 .llseek = seq_lseek,
210 .release = single_release,
211};
212
213#ifdef CONFIG_PREEMPT_DYNAMIC
214
215static ssize_t sched_dynamic_write(struct file *filp, const char __user *ubuf,
216 size_t cnt, loff_t *ppos)
217{
218 char buf[16];
219 int mode;
220
221 if (cnt > 15)
222 cnt = 15;
223
224 if (copy_from_user(&buf, ubuf, cnt))
225 return -EFAULT;
226
227 buf[cnt] = 0;
228 mode = sched_dynamic_mode(strstrip(buf));
229 if (mode < 0)
230 return mode;
231
232 sched_dynamic_update(mode);
233
234 *ppos += cnt;
235
236 return cnt;
237}
238
239static int sched_dynamic_show(struct seq_file *m, void *v)
240{
241 int i = (IS_ENABLED(CONFIG_PREEMPT_RT) || IS_ENABLED(CONFIG_ARCH_HAS_PREEMPT_LAZY)) * 2;
242 int j;
243
244 /* Count entries in NULL terminated preempt_modes */
245 for (j = 0; preempt_modes[j]; j++)
246 ;
247 j -= !IS_ENABLED(CONFIG_ARCH_HAS_PREEMPT_LAZY);
248
249 for (; i < j; i++) {
250 if (preempt_dynamic_mode == i)
251 seq_puts(m, "(");
252 seq_puts(m, preempt_modes[i]);
253 if (preempt_dynamic_mode == i)
254 seq_puts(m, ")");
255
256 seq_puts(m, " ");
257 }
258
259 seq_puts(m, "\n");
260 return 0;
261}
262
263static int sched_dynamic_open(struct inode *inode, struct file *filp)
264{
265 return single_open(filp, sched_dynamic_show, NULL);
266}
267
268static const struct file_operations sched_dynamic_fops = {
269 .open = sched_dynamic_open,
270 .write = sched_dynamic_write,
271 .read = seq_read,
272 .llseek = seq_lseek,
273 .release = single_release,
274};
275
276#endif /* CONFIG_PREEMPT_DYNAMIC */
277
278__read_mostly bool sched_debug_verbose;
279
280static struct dentry *sd_dentry;
281
282
283static ssize_t sched_verbose_write(struct file *filp, const char __user *ubuf,
284 size_t cnt, loff_t *ppos)
285{
286 ssize_t result;
287 bool orig;
288
289 cpus_read_lock();
290 sched_domains_mutex_lock();
291
292 orig = sched_debug_verbose;
293 result = debugfs_write_file_bool(filp, ubuf, cnt, ppos);
294
295 if (sched_debug_verbose && !orig)
296 update_sched_domain_debugfs();
297 else if (!sched_debug_verbose && orig) {
298 debugfs_remove(sd_dentry);
299 sd_dentry = NULL;
300 }
301
302 sched_domains_mutex_unlock();
303 cpus_read_unlock();
304
305 return result;
306}
307
308static const struct file_operations sched_verbose_fops = {
309 .read = debugfs_read_file_bool,
310 .write = sched_verbose_write,
311 .open = simple_open,
312 .llseek = default_llseek,
313};
314
315static const struct seq_operations sched_debug_sops;
316
317static int sched_debug_open(struct inode *inode, struct file *filp)
318{
319 return seq_open(filp, &sched_debug_sops);
320}
321
322static const struct file_operations sched_debug_fops = {
323 .open = sched_debug_open,
324 .read = seq_read,
325 .llseek = seq_lseek,
326 .release = seq_release,
327};
328
329enum dl_param {
330 DL_RUNTIME = 0,
331 DL_PERIOD,
332};
333
334static unsigned long dl_server_period_max = (1UL << 22) * NSEC_PER_USEC; /* ~4 seconds */
335static unsigned long dl_server_period_min = (100) * NSEC_PER_USEC; /* 100 us */
336
337static ssize_t sched_server_write_common(struct file *filp, const char __user *ubuf,
338 size_t cnt, loff_t *ppos, enum dl_param param,
339 void *server)
340{
341 long cpu = (long) ((struct seq_file *) filp->private_data)->private;
342 struct sched_dl_entity *dl_se = (struct sched_dl_entity *)server;
343 u64 old_runtime, runtime, period;
344 struct rq *rq = cpu_rq(cpu);
345 int retval = 0;
346 size_t err;
347 u64 value;
348
349 err = kstrtoull_from_user(ubuf, cnt, 10, &value);
350 if (err)
351 return err;
352
353 scoped_guard (rq_lock_irqsave, rq) {
354 old_runtime = runtime = dl_se->dl_runtime;
355 period = dl_se->dl_period;
356
357 switch (param) {
358 case DL_RUNTIME:
359 if (runtime == value)
360 break;
361 runtime = value;
362 break;
363 case DL_PERIOD:
364 if (value == period)
365 break;
366 period = value;
367 break;
368 }
369
370 if (runtime > period ||
371 period > dl_server_period_max ||
372 period < dl_server_period_min) {
373 return -EINVAL;
374 }
375
376 update_rq_clock(rq);
377 dl_server_stop(dl_se);
378 retval = dl_server_apply_params(dl_se, runtime, period, 0);
379 dl_server_start(dl_se);
380
381 if (retval < 0)
382 return retval;
383 }
384
385 if (!!old_runtime ^ !!runtime) {
386 pr_info("%s server %sabled on CPU %d%s.\n",
387 server == &rq->fair_server ? "Fair" : "Ext",
388 runtime ? "en" : "dis",
389 cpu_of(rq),
390 runtime ? "" : ", system may malfunction due to starvation");
391 }
392
393 *ppos += cnt;
394 return cnt;
395}
396
397static size_t sched_server_show_common(struct seq_file *m, void *v, enum dl_param param,
398 void *server)
399{
400 struct sched_dl_entity *dl_se = (struct sched_dl_entity *)server;
401 u64 value;
402
403 switch (param) {
404 case DL_RUNTIME:
405 value = dl_se->dl_runtime;
406 break;
407 case DL_PERIOD:
408 value = dl_se->dl_period;
409 break;
410 }
411
412 seq_printf(m, "%llu\n", value);
413 return 0;
414}
415
416static ssize_t
417sched_fair_server_runtime_write(struct file *filp, const char __user *ubuf,
418 size_t cnt, loff_t *ppos)
419{
420 long cpu = (long) ((struct seq_file *) filp->private_data)->private;
421 struct rq *rq = cpu_rq(cpu);
422
423 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_RUNTIME,
424 &rq->fair_server);
425}
426
427static int sched_fair_server_runtime_show(struct seq_file *m, void *v)
428{
429 unsigned long cpu = (unsigned long) m->private;
430 struct rq *rq = cpu_rq(cpu);
431
432 return sched_server_show_common(m, v, DL_RUNTIME, &rq->fair_server);
433}
434
435static int sched_fair_server_runtime_open(struct inode *inode, struct file *filp)
436{
437 return single_open(filp, sched_fair_server_runtime_show, inode->i_private);
438}
439
440static const struct file_operations fair_server_runtime_fops = {
441 .open = sched_fair_server_runtime_open,
442 .write = sched_fair_server_runtime_write,
443 .read = seq_read,
444 .llseek = seq_lseek,
445 .release = single_release,
446};
447
448#ifdef CONFIG_SCHED_CLASS_EXT
449static ssize_t
450sched_ext_server_runtime_write(struct file *filp, const char __user *ubuf,
451 size_t cnt, loff_t *ppos)
452{
453 long cpu = (long) ((struct seq_file *) filp->private_data)->private;
454 struct rq *rq = cpu_rq(cpu);
455
456 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_RUNTIME,
457 &rq->ext_server);
458}
459
460static int sched_ext_server_runtime_show(struct seq_file *m, void *v)
461{
462 unsigned long cpu = (unsigned long) m->private;
463 struct rq *rq = cpu_rq(cpu);
464
465 return sched_server_show_common(m, v, DL_RUNTIME, &rq->ext_server);
466}
467
468static int sched_ext_server_runtime_open(struct inode *inode, struct file *filp)
469{
470 return single_open(filp, sched_ext_server_runtime_show, inode->i_private);
471}
472
473static const struct file_operations ext_server_runtime_fops = {
474 .open = sched_ext_server_runtime_open,
475 .write = sched_ext_server_runtime_write,
476 .read = seq_read,
477 .llseek = seq_lseek,
478 .release = single_release,
479};
480#endif /* CONFIG_SCHED_CLASS_EXT */
481
482static ssize_t
483sched_fair_server_period_write(struct file *filp, const char __user *ubuf,
484 size_t cnt, loff_t *ppos)
485{
486 long cpu = (long) ((struct seq_file *) filp->private_data)->private;
487 struct rq *rq = cpu_rq(cpu);
488
489 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD,
490 &rq->fair_server);
491}
492
493static int sched_fair_server_period_show(struct seq_file *m, void *v)
494{
495 unsigned long cpu = (unsigned long) m->private;
496 struct rq *rq = cpu_rq(cpu);
497
498 return sched_server_show_common(m, v, DL_PERIOD, &rq->fair_server);
499}
500
501static int sched_fair_server_period_open(struct inode *inode, struct file *filp)
502{
503 return single_open(filp, sched_fair_server_period_show, inode->i_private);
504}
505
506static const struct file_operations fair_server_period_fops = {
507 .open = sched_fair_server_period_open,
508 .write = sched_fair_server_period_write,
509 .read = seq_read,
510 .llseek = seq_lseek,
511 .release = single_release,
512};
513
514#ifdef CONFIG_SCHED_CLASS_EXT
515static ssize_t
516sched_ext_server_period_write(struct file *filp, const char __user *ubuf,
517 size_t cnt, loff_t *ppos)
518{
519 long cpu = (long) ((struct seq_file *) filp->private_data)->private;
520 struct rq *rq = cpu_rq(cpu);
521
522 return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD,
523 &rq->ext_server);
524}
525
526static int sched_ext_server_period_show(struct seq_file *m, void *v)
527{
528 unsigned long cpu = (unsigned long) m->private;
529 struct rq *rq = cpu_rq(cpu);
530
531 return sched_server_show_common(m, v, DL_PERIOD, &rq->ext_server);
532}
533
534static int sched_ext_server_period_open(struct inode *inode, struct file *filp)
535{
536 return single_open(filp, sched_ext_server_period_show, inode->i_private);
537}
538
539static const struct file_operations ext_server_period_fops = {
540 .open = sched_ext_server_period_open,
541 .write = sched_ext_server_period_write,
542 .read = seq_read,
543 .llseek = seq_lseek,
544 .release = single_release,
545};
546#endif /* CONFIG_SCHED_CLASS_EXT */
547
548static struct dentry *debugfs_sched;
549
550static void debugfs_fair_server_init(void)
551{
552 struct dentry *d_fair;
553 unsigned long cpu;
554
555 d_fair = debugfs_create_dir("fair_server", debugfs_sched);
556 if (!d_fair)
557 return;
558
559 for_each_possible_cpu(cpu) {
560 struct dentry *d_cpu;
561 char buf[32];
562
563 snprintf(buf, sizeof(buf), "cpu%lu", cpu);
564 d_cpu = debugfs_create_dir(buf, d_fair);
565
566 debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &fair_server_runtime_fops);
567 debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &fair_server_period_fops);
568 }
569}
570
571#ifdef CONFIG_SCHED_CLASS_EXT
572static void debugfs_ext_server_init(void)
573{
574 struct dentry *d_ext;
575 unsigned long cpu;
576
577 d_ext = debugfs_create_dir("ext_server", debugfs_sched);
578 if (!d_ext)
579 return;
580
581 for_each_possible_cpu(cpu) {
582 struct dentry *d_cpu;
583 char buf[32];
584
585 snprintf(buf, sizeof(buf), "cpu%lu", cpu);
586 d_cpu = debugfs_create_dir(buf, d_ext);
587
588 debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &ext_server_runtime_fops);
589 debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &ext_server_period_fops);
590 }
591}
592#endif /* CONFIG_SCHED_CLASS_EXT */
593
594static __init int sched_init_debug(void)
595{
596 struct dentry __maybe_unused *numa;
597
598 debugfs_sched = debugfs_create_dir("sched", NULL);
599
600 debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops);
601 debugfs_create_file_unsafe("verbose", 0644, debugfs_sched, &sched_debug_verbose, &sched_verbose_fops);
602#ifdef CONFIG_PREEMPT_DYNAMIC
603 debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
604#endif
605
606 debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice);
607
608 debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
609 debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
610
611 debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
612 debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
613 debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
614
615 sched_domains_mutex_lock();
616 update_sched_domain_debugfs();
617 sched_domains_mutex_unlock();
618
619#ifdef CONFIG_NUMA_BALANCING
620 numa = debugfs_create_dir("numa_balancing", debugfs_sched);
621
622 debugfs_create_u32("scan_delay_ms", 0644, numa, &sysctl_numa_balancing_scan_delay);
623 debugfs_create_u32("scan_period_min_ms", 0644, numa, &sysctl_numa_balancing_scan_period_min);
624 debugfs_create_u32("scan_period_max_ms", 0644, numa, &sysctl_numa_balancing_scan_period_max);
625 debugfs_create_u32("scan_size_mb", 0644, numa, &sysctl_numa_balancing_scan_size);
626 debugfs_create_u32("hot_threshold_ms", 0644, numa, &sysctl_numa_balancing_hot_threshold);
627#endif /* CONFIG_NUMA_BALANCING */
628
629 debugfs_create_file("debug", 0444, debugfs_sched, NULL, &sched_debug_fops);
630
631 debugfs_fair_server_init();
632#ifdef CONFIG_SCHED_CLASS_EXT
633 debugfs_ext_server_init();
634#endif
635
636 return 0;
637}
638late_initcall(sched_init_debug);
639
640static cpumask_var_t sd_sysctl_cpus;
641
642static int sd_flags_show(struct seq_file *m, void *v)
643{
644 unsigned long flags = *(unsigned int *)m->private;
645 int idx;
646
647 for_each_set_bit(idx, &flags, __SD_FLAG_CNT) {
648 seq_puts(m, sd_flag_debug[idx].name);
649 seq_puts(m, " ");
650 }
651 seq_puts(m, "\n");
652
653 return 0;
654}
655
656static int sd_flags_open(struct inode *inode, struct file *file)
657{
658 return single_open(file, sd_flags_show, inode->i_private);
659}
660
661static const struct file_operations sd_flags_fops = {
662 .open = sd_flags_open,
663 .read = seq_read,
664 .llseek = seq_lseek,
665 .release = single_release,
666};
667
668static void register_sd(struct sched_domain *sd, struct dentry *parent)
669{
670#define SDM(type, mode, member) \
671 debugfs_create_##type(#member, mode, parent, &sd->member)
672
673 SDM(ulong, 0644, min_interval);
674 SDM(ulong, 0644, max_interval);
675 SDM(u64, 0644, max_newidle_lb_cost);
676 SDM(u32, 0644, busy_factor);
677 SDM(u32, 0644, imbalance_pct);
678 SDM(u32, 0644, cache_nice_tries);
679 SDM(str, 0444, name);
680
681#undef SDM
682
683 debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops);
684 debugfs_create_file("groups_flags", 0444, parent, &sd->groups->flags, &sd_flags_fops);
685 debugfs_create_u32("level", 0444, parent, (u32 *)&sd->level);
686
687 if (sd->flags & SD_ASYM_PACKING)
688 debugfs_create_u32("group_asym_prefer_cpu", 0444, parent,
689 (u32 *)&sd->groups->asym_prefer_cpu);
690}
691
692void update_sched_domain_debugfs(void)
693{
694 int cpu, i;
695
696 /*
697 * This can unfortunately be invoked before sched_debug_init() creates
698 * the debug directory. Don't touch sd_sysctl_cpus until then.
699 */
700 if (!debugfs_sched)
701 return;
702
703 if (!sched_debug_verbose)
704 return;
705
706 if (!cpumask_available(sd_sysctl_cpus)) {
707 if (!alloc_cpumask_var(&sd_sysctl_cpus, GFP_KERNEL))
708 return;
709 cpumask_copy(sd_sysctl_cpus, cpu_possible_mask);
710 }
711
712 if (!sd_dentry) {
713 sd_dentry = debugfs_create_dir("domains", debugfs_sched);
714
715 /* rebuild sd_sysctl_cpus if empty since it gets cleared below */
716 if (cpumask_empty(sd_sysctl_cpus))
717 cpumask_copy(sd_sysctl_cpus, cpu_online_mask);
718 }
719
720 for_each_cpu(cpu, sd_sysctl_cpus) {
721 struct sched_domain *sd;
722 struct dentry *d_cpu;
723 char buf[32];
724
725 snprintf(buf, sizeof(buf), "cpu%d", cpu);
726 debugfs_lookup_and_remove(buf, sd_dentry);
727 d_cpu = debugfs_create_dir(buf, sd_dentry);
728
729 i = 0;
730 for_each_domain(cpu, sd) {
731 struct dentry *d_sd;
732
733 snprintf(buf, sizeof(buf), "domain%d", i);
734 d_sd = debugfs_create_dir(buf, d_cpu);
735
736 register_sd(sd, d_sd);
737 i++;
738 }
739
740 __cpumask_clear_cpu(cpu, sd_sysctl_cpus);
741 }
742}
743
744void dirty_sched_domain_sysctl(int cpu)
745{
746 if (cpumask_available(sd_sysctl_cpus))
747 __cpumask_set_cpu(cpu, sd_sysctl_cpus);
748}
749
750#ifdef CONFIG_FAIR_GROUP_SCHED
751static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
752{
753 struct sched_entity *se = tg->se[cpu];
754
755#define P(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
756#define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", \
757 #F, (long long)schedstat_val(stats->F))
758#define PN(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
759#define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", \
760 #F, SPLIT_NS((long long)schedstat_val(stats->F)))
761
762 if (!se)
763 return;
764
765 PN(se->exec_start);
766 PN(se->vruntime);
767 PN(se->sum_exec_runtime);
768
769 if (schedstat_enabled()) {
770 struct sched_statistics *stats;
771 stats = __schedstats_from_se(se);
772
773 PN_SCHEDSTAT(wait_start);
774 PN_SCHEDSTAT(sleep_start);
775 PN_SCHEDSTAT(block_start);
776 PN_SCHEDSTAT(sleep_max);
777 PN_SCHEDSTAT(block_max);
778 PN_SCHEDSTAT(exec_max);
779 PN_SCHEDSTAT(slice_max);
780 PN_SCHEDSTAT(wait_max);
781 PN_SCHEDSTAT(wait_sum);
782 P_SCHEDSTAT(wait_count);
783 }
784
785 P(se->load.weight);
786 P(se->avg.load_avg);
787 P(se->avg.util_avg);
788 P(se->avg.runnable_avg);
789
790#undef PN_SCHEDSTAT
791#undef PN
792#undef P_SCHEDSTAT
793#undef P
794}
795#endif /* CONFIG_FAIR_GROUP_SCHED */
796
797#ifdef CONFIG_CGROUP_SCHED
798static DEFINE_SPINLOCK(sched_debug_lock);
799static char group_path[PATH_MAX];
800
801static void task_group_path(struct task_group *tg, char *path, int plen)
802{
803 if (autogroup_path(tg, path, plen))
804 return;
805
806 cgroup_path(tg->css.cgroup, path, plen);
807}
808
809/*
810 * Only 1 SEQ_printf_task_group_path() caller can use the full length
811 * group_path[] for cgroup path. Other simultaneous callers will have
812 * to use a shorter stack buffer. A "..." suffix is appended at the end
813 * of the stack buffer so that it will show up in case the output length
814 * matches the given buffer size to indicate possible path name truncation.
815 */
816#define SEQ_printf_task_group_path(m, tg, fmt...) \
817{ \
818 if (spin_trylock(&sched_debug_lock)) { \
819 task_group_path(tg, group_path, sizeof(group_path)); \
820 SEQ_printf(m, fmt, group_path); \
821 spin_unlock(&sched_debug_lock); \
822 } else { \
823 char buf[128]; \
824 char *bufend = buf + sizeof(buf) - 3; \
825 task_group_path(tg, buf, bufend - buf); \
826 strcpy(bufend - 1, "..."); \
827 SEQ_printf(m, fmt, buf); \
828 } \
829}
830#endif
831
832static void
833print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
834{
835 if (task_current(rq, p))
836 SEQ_printf(m, ">R");
837 else
838 SEQ_printf(m, " %c", task_state_to_char(p));
839
840 SEQ_printf(m, " %15s %5d %9Ld.%06ld %c %9Ld.%06ld %c %9Ld.%06ld %9Ld.%06ld %9Ld %5d ",
841 p->comm, task_pid_nr(p),
842 SPLIT_NS(p->se.vruntime),
843 entity_eligible(cfs_rq_of(&p->se), &p->se) ? 'E' : 'N',
844 SPLIT_NS(p->se.deadline),
845 p->se.custom_slice ? 'S' : ' ',
846 SPLIT_NS(p->se.slice),
847 SPLIT_NS(p->se.sum_exec_runtime),
848 (long long)(p->nvcsw + p->nivcsw),
849 p->prio);
850
851 SEQ_printf(m, "%9lld.%06ld %9lld.%06ld %9lld.%06ld",
852 SPLIT_NS(schedstat_val_or_zero(p->stats.wait_sum)),
853 SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)),
854 SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime)));
855
856#ifdef CONFIG_NUMA_BALANCING
857 SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
858#endif
859#ifdef CONFIG_CGROUP_SCHED
860 SEQ_printf_task_group_path(m, task_group(p), " %s")
861#endif
862
863 SEQ_printf(m, "\n");
864}
865
866static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
867{
868 struct task_struct *g, *p;
869
870 SEQ_printf(m, "\n");
871 SEQ_printf(m, "runnable tasks:\n");
872 SEQ_printf(m, " S task PID vruntime eligible "
873 "deadline slice sum-exec switches "
874 "prio wait-time sum-sleep sum-block"
875#ifdef CONFIG_NUMA_BALANCING
876 " node group-id"
877#endif
878#ifdef CONFIG_CGROUP_SCHED
879 " group-path"
880#endif
881 "\n");
882 SEQ_printf(m, "-------------------------------------------------------"
883 "------------------------------------------------------"
884 "------------------------------------------------------"
885#ifdef CONFIG_NUMA_BALANCING
886 "--------------"
887#endif
888#ifdef CONFIG_CGROUP_SCHED
889 "--------------"
890#endif
891 "\n");
892
893 rcu_read_lock();
894 for_each_process_thread(g, p) {
895 if (task_cpu(p) != rq_cpu)
896 continue;
897
898 print_task(m, rq, p);
899 }
900 rcu_read_unlock();
901}
902
903void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
904{
905 s64 left_vruntime = -1, right_vruntime = -1, left_deadline = -1, spread;
906 s64 zero_vruntime = -1, sum_w_vruntime = -1;
907 u64 avruntime;
908 struct sched_entity *last, *first, *root;
909 struct rq *rq = cpu_rq(cpu);
910 unsigned int sum_shift;
911 unsigned long flags;
912 u64 sum_weight;
913
914#ifdef CONFIG_FAIR_GROUP_SCHED
915 SEQ_printf(m, "\n");
916 SEQ_printf_task_group_path(m, cfs_rq->tg, "cfs_rq[%d]:%s\n", cpu);
917#else
918 SEQ_printf(m, "\n");
919 SEQ_printf(m, "cfs_rq[%d]:\n", cpu);
920#endif
921
922 raw_spin_rq_lock_irqsave(rq, flags);
923 root = __pick_root_entity(cfs_rq);
924 if (root)
925 left_vruntime = root->min_vruntime;
926 first = __pick_first_entity(cfs_rq);
927 if (first)
928 left_deadline = first->deadline;
929 last = __pick_last_entity(cfs_rq);
930 if (last)
931 right_vruntime = last->vruntime;
932 zero_vruntime = cfs_rq->zero_vruntime;
933 sum_w_vruntime = cfs_rq->sum_w_vruntime;
934 sum_weight = cfs_rq->sum_weight;
935 sum_shift = cfs_rq->sum_shift;
936 avruntime = avg_vruntime(cfs_rq);
937 raw_spin_rq_unlock_irqrestore(rq, flags);
938
939 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_deadline",
940 SPLIT_NS(left_deadline));
941 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_vruntime",
942 SPLIT_NS(left_vruntime));
943 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "zero_vruntime",
944 SPLIT_NS(zero_vruntime));
945 SEQ_printf(m, " .%-30s: %Ld (%d bits)\n", "sum_w_vruntime",
946 sum_w_vruntime, ilog2(abs(sum_w_vruntime)));
947 SEQ_printf(m, " .%-30s: %Lu\n", "sum_weight",
948 sum_weight);
949 SEQ_printf(m, " .%-30s: %u\n", "sum_shift", sum_shift);
950 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "avg_vruntime",
951 SPLIT_NS(avruntime));
952 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "right_vruntime",
953 SPLIT_NS(right_vruntime));
954 spread = right_vruntime - left_vruntime;
955 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", SPLIT_NS(spread));
956 SEQ_printf(m, " .%-30s: %d\n", "nr_queued", cfs_rq->nr_queued);
957 SEQ_printf(m, " .%-30s: %d\n", "h_nr_runnable", cfs_rq->h_nr_runnable);
958 SEQ_printf(m, " .%-30s: %d\n", "h_nr_queued", cfs_rq->h_nr_queued);
959 SEQ_printf(m, " .%-30s: %d\n", "h_nr_idle", cfs_rq->h_nr_idle);
960 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
961 SEQ_printf(m, " .%-30s: %lu\n", "load_avg",
962 cfs_rq->avg.load_avg);
963 SEQ_printf(m, " .%-30s: %lu\n", "runnable_avg",
964 cfs_rq->avg.runnable_avg);
965 SEQ_printf(m, " .%-30s: %lu\n", "util_avg",
966 cfs_rq->avg.util_avg);
967 SEQ_printf(m, " .%-30s: %u\n", "util_est",
968 cfs_rq->avg.util_est);
969 SEQ_printf(m, " .%-30s: %ld\n", "removed.load_avg",
970 cfs_rq->removed.load_avg);
971 SEQ_printf(m, " .%-30s: %ld\n", "removed.util_avg",
972 cfs_rq->removed.util_avg);
973 SEQ_printf(m, " .%-30s: %ld\n", "removed.runnable_avg",
974 cfs_rq->removed.runnable_avg);
975#ifdef CONFIG_FAIR_GROUP_SCHED
976 SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib",
977 cfs_rq->tg_load_avg_contrib);
978 SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg",
979 atomic_long_read(&cfs_rq->tg->load_avg));
980#endif /* CONFIG_FAIR_GROUP_SCHED */
981#ifdef CONFIG_CFS_BANDWIDTH
982 SEQ_printf(m, " .%-30s: %d\n", "throttled",
983 cfs_rq->throttled);
984 SEQ_printf(m, " .%-30s: %d\n", "throttle_count",
985 cfs_rq->throttle_count);
986#endif
987
988#ifdef CONFIG_FAIR_GROUP_SCHED
989 print_cfs_group_stats(m, cpu, cfs_rq->tg);
990#endif
991}
992
993void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
994{
995#ifdef CONFIG_RT_GROUP_SCHED
996 SEQ_printf(m, "\n");
997 SEQ_printf_task_group_path(m, rt_rq->tg, "rt_rq[%d]:%s\n", cpu);
998#else
999 SEQ_printf(m, "\n");
1000 SEQ_printf(m, "rt_rq[%d]:\n", cpu);
1001#endif
1002
1003#define P(x) \
1004 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
1005#define PU(x) \
1006 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(rt_rq->x))
1007#define PN(x) \
1008 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
1009
1010 PU(rt_nr_running);
1011
1012#ifdef CONFIG_RT_GROUP_SCHED
1013 P(rt_throttled);
1014 PN(rt_time);
1015 PN(rt_runtime);
1016#endif
1017
1018#undef PN
1019#undef PU
1020#undef P
1021}
1022
1023void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq)
1024{
1025 struct dl_bw *dl_bw;
1026
1027 SEQ_printf(m, "\n");
1028 SEQ_printf(m, "dl_rq[%d]:\n", cpu);
1029
1030#define PU(x) \
1031 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x))
1032
1033 PU(dl_nr_running);
1034 dl_bw = &cpu_rq(cpu)->rd->dl_bw;
1035 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw);
1036 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw);
1037
1038#undef PU
1039}
1040
1041static void print_cpu(struct seq_file *m, int cpu)
1042{
1043 struct rq *rq = cpu_rq(cpu);
1044
1045#ifdef CONFIG_X86
1046 {
1047 unsigned int freq = cpu_khz ? : 1;
1048
1049 SEQ_printf(m, "cpu#%d, %u.%03u MHz\n",
1050 cpu, freq / 1000, (freq % 1000));
1051 }
1052#else /* !CONFIG_X86: */
1053 SEQ_printf(m, "cpu#%d\n", cpu);
1054#endif /* !CONFIG_X86 */
1055
1056#define P(x) \
1057do { \
1058 if (sizeof(rq->x) == 4) \
1059 SEQ_printf(m, " .%-30s: %d\n", #x, (int)(rq->x)); \
1060 else \
1061 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
1062} while (0)
1063
1064#define PN(x) \
1065 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
1066
1067 P(nr_running);
1068 P(nr_switches);
1069 P(nr_uninterruptible);
1070 PN(next_balance);
1071 SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr)));
1072 PN(clock);
1073 PN(clock_task);
1074#undef P
1075#undef PN
1076
1077#define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
1078 P64(avg_idle);
1079 P64(max_idle_balance_cost);
1080#undef P64
1081
1082#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, schedstat_val(rq->n));
1083 if (schedstat_enabled()) {
1084 P(yld_count);
1085 P(sched_count);
1086 P(sched_goidle);
1087 P(ttwu_count);
1088 P(ttwu_local);
1089 }
1090#undef P
1091
1092 print_cfs_stats(m, cpu);
1093 print_rt_stats(m, cpu);
1094 print_dl_stats(m, cpu);
1095
1096 print_rq(m, rq, cpu);
1097 SEQ_printf(m, "\n");
1098}
1099
1100static const char *sched_tunable_scaling_names[] = {
1101 "none",
1102 "logarithmic",
1103 "linear"
1104};
1105
1106static void sched_debug_header(struct seq_file *m)
1107{
1108 u64 ktime, sched_clk, cpu_clk;
1109 unsigned long flags;
1110
1111 local_irq_save(flags);
1112 ktime = ktime_to_ns(ktime_get());
1113 sched_clk = sched_clock();
1114 cpu_clk = local_clock();
1115 local_irq_restore(flags);
1116
1117 SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
1118 init_utsname()->release,
1119 (int)strcspn(init_utsname()->version, " "),
1120 init_utsname()->version);
1121
1122#define P(x) \
1123 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
1124#define PN(x) \
1125 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1126 PN(ktime);
1127 PN(sched_clk);
1128 PN(cpu_clk);
1129 P(jiffies);
1130#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
1131 P(sched_clock_stable());
1132#endif
1133#undef PN
1134#undef P
1135
1136 SEQ_printf(m, "\n");
1137 SEQ_printf(m, "sysctl_sched\n");
1138
1139#define P(x) \
1140 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1141#define PN(x) \
1142 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1143 PN(sysctl_sched_base_slice);
1144 P(sysctl_sched_features);
1145#undef PN
1146#undef P
1147
1148 SEQ_printf(m, " .%-40s: %d (%s)\n",
1149 "sysctl_sched_tunable_scaling",
1150 sysctl_sched_tunable_scaling,
1151 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
1152 SEQ_printf(m, "\n");
1153}
1154
1155static int sched_debug_show(struct seq_file *m, void *v)
1156{
1157 int cpu = (unsigned long)(v - 2);
1158
1159 if (cpu != -1)
1160 print_cpu(m, cpu);
1161 else
1162 sched_debug_header(m);
1163
1164 return 0;
1165}
1166
1167void sysrq_sched_debug_show(void)
1168{
1169 int cpu;
1170
1171 sched_debug_header(NULL);
1172 for_each_online_cpu(cpu) {
1173 /*
1174 * Need to reset softlockup watchdogs on all CPUs, because
1175 * another CPU might be blocked waiting for us to process
1176 * an IPI or stop_machine.
1177 */
1178 touch_nmi_watchdog();
1179 touch_all_softlockup_watchdogs();
1180 print_cpu(NULL, cpu);
1181 }
1182}
1183
1184/*
1185 * This iterator needs some explanation.
1186 * It returns 1 for the header position.
1187 * This means 2 is CPU 0.
1188 * In a hotplugged system some CPUs, including CPU 0, may be missing so we have
1189 * to use cpumask_* to iterate over the CPUs.
1190 */
1191static void *sched_debug_start(struct seq_file *file, loff_t *offset)
1192{
1193 unsigned long n = *offset;
1194
1195 if (n == 0)
1196 return (void *) 1;
1197
1198 n--;
1199
1200 if (n > 0)
1201 n = cpumask_next(n - 1, cpu_online_mask);
1202 else
1203 n = cpumask_first(cpu_online_mask);
1204
1205 *offset = n + 1;
1206
1207 if (n < nr_cpu_ids)
1208 return (void *)(unsigned long)(n + 2);
1209
1210 return NULL;
1211}
1212
1213static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset)
1214{
1215 (*offset)++;
1216 return sched_debug_start(file, offset);
1217}
1218
1219static void sched_debug_stop(struct seq_file *file, void *data)
1220{
1221}
1222
1223static const struct seq_operations sched_debug_sops = {
1224 .start = sched_debug_start,
1225 .next = sched_debug_next,
1226 .stop = sched_debug_stop,
1227 .show = sched_debug_show,
1228};
1229
1230#define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F))
1231#define __P(F) __PS(#F, F)
1232#define P(F) __PS(#F, p->F)
1233#define PM(F, M) __PS(#F, p->F & (M))
1234#define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F)))
1235#define __PN(F) __PSN(#F, F)
1236#define PN(F) __PSN(#F, p->F)
1237
1238
1239#ifdef CONFIG_NUMA_BALANCING
1240void print_numa_stats(struct seq_file *m, int node, unsigned long tsf,
1241 unsigned long tpf, unsigned long gsf, unsigned long gpf)
1242{
1243 SEQ_printf(m, "numa_faults node=%d ", node);
1244 SEQ_printf(m, "task_private=%lu task_shared=%lu ", tpf, tsf);
1245 SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gpf, gsf);
1246}
1247#endif
1248
1249
1250static void sched_show_numa(struct task_struct *p, struct seq_file *m)
1251{
1252#ifdef CONFIG_NUMA_BALANCING
1253 if (p->mm)
1254 P(mm->numa_scan_seq);
1255
1256 P(numa_pages_migrated);
1257 P(numa_preferred_nid);
1258 P(total_numa_faults);
1259 SEQ_printf(m, "current_node=%d, numa_group_id=%d\n",
1260 task_node(p), task_numa_group_id(p));
1261 show_numa_stats(p, m);
1262#endif /* CONFIG_NUMA_BALANCING */
1263}
1264
1265void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
1266 struct seq_file *m)
1267{
1268 unsigned long nr_switches;
1269
1270 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr_ns(p, ns),
1271 get_nr_threads(p));
1272 SEQ_printf(m,
1273 "---------------------------------------------------------"
1274 "----------\n");
1275
1276#define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->stats.F))
1277#define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->stats.F))
1278
1279 PN(se.exec_start);
1280 PN(se.vruntime);
1281 PN(se.sum_exec_runtime);
1282
1283 nr_switches = p->nvcsw + p->nivcsw;
1284
1285 P(se.nr_migrations);
1286
1287 if (schedstat_enabled()) {
1288 u64 avg_atom, avg_per_cpu;
1289
1290 PN_SCHEDSTAT(sum_sleep_runtime);
1291 PN_SCHEDSTAT(sum_block_runtime);
1292 PN_SCHEDSTAT(wait_start);
1293 PN_SCHEDSTAT(sleep_start);
1294 PN_SCHEDSTAT(block_start);
1295 PN_SCHEDSTAT(sleep_max);
1296 PN_SCHEDSTAT(block_max);
1297 PN_SCHEDSTAT(exec_max);
1298 PN_SCHEDSTAT(slice_max);
1299 PN_SCHEDSTAT(wait_max);
1300 PN_SCHEDSTAT(wait_sum);
1301 P_SCHEDSTAT(wait_count);
1302 PN_SCHEDSTAT(iowait_sum);
1303 P_SCHEDSTAT(iowait_count);
1304 P_SCHEDSTAT(nr_migrations_cold);
1305 P_SCHEDSTAT(nr_failed_migrations_affine);
1306 P_SCHEDSTAT(nr_failed_migrations_running);
1307 P_SCHEDSTAT(nr_failed_migrations_hot);
1308 P_SCHEDSTAT(nr_forced_migrations);
1309 P_SCHEDSTAT(nr_wakeups);
1310 P_SCHEDSTAT(nr_wakeups_sync);
1311 P_SCHEDSTAT(nr_wakeups_migrate);
1312 P_SCHEDSTAT(nr_wakeups_local);
1313 P_SCHEDSTAT(nr_wakeups_remote);
1314 P_SCHEDSTAT(nr_wakeups_affine);
1315 P_SCHEDSTAT(nr_wakeups_affine_attempts);
1316 P_SCHEDSTAT(nr_wakeups_passive);
1317 P_SCHEDSTAT(nr_wakeups_idle);
1318
1319 avg_atom = p->se.sum_exec_runtime;
1320 if (nr_switches)
1321 avg_atom = div64_ul(avg_atom, nr_switches);
1322 else
1323 avg_atom = -1LL;
1324
1325 avg_per_cpu = p->se.sum_exec_runtime;
1326 if (p->se.nr_migrations) {
1327 avg_per_cpu = div64_u64(avg_per_cpu,
1328 p->se.nr_migrations);
1329 } else {
1330 avg_per_cpu = -1LL;
1331 }
1332
1333 __PN(avg_atom);
1334 __PN(avg_per_cpu);
1335
1336#ifdef CONFIG_SCHED_CORE
1337 PN_SCHEDSTAT(core_forceidle_sum);
1338#endif
1339 }
1340
1341 __P(nr_switches);
1342 __PS("nr_voluntary_switches", p->nvcsw);
1343 __PS("nr_involuntary_switches", p->nivcsw);
1344
1345 P(se.load.weight);
1346 P(se.avg.load_sum);
1347 P(se.avg.runnable_sum);
1348 P(se.avg.util_sum);
1349 P(se.avg.load_avg);
1350 P(se.avg.runnable_avg);
1351 P(se.avg.util_avg);
1352 P(se.avg.last_update_time);
1353 PM(se.avg.util_est, ~UTIL_AVG_UNCHANGED);
1354#ifdef CONFIG_UCLAMP_TASK
1355 __PS("uclamp.min", p->uclamp_req[UCLAMP_MIN].value);
1356 __PS("uclamp.max", p->uclamp_req[UCLAMP_MAX].value);
1357 __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN));
1358 __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX));
1359#endif /* CONFIG_UCLAMP_TASK */
1360 P(policy);
1361 P(prio);
1362 if (task_has_dl_policy(p)) {
1363 P(dl.runtime);
1364 P(dl.deadline);
1365 } else if (fair_policy(p->policy)) {
1366 P(se.slice);
1367 }
1368#ifdef CONFIG_SCHED_CLASS_EXT
1369 __PS("ext.enabled", task_on_scx(p));
1370#endif
1371#undef PN_SCHEDSTAT
1372#undef P_SCHEDSTAT
1373
1374 {
1375 unsigned int this_cpu = raw_smp_processor_id();
1376 u64 t0, t1;
1377
1378 t0 = cpu_clock(this_cpu);
1379 t1 = cpu_clock(this_cpu);
1380 __PS("clock-delta", t1-t0);
1381 }
1382
1383 sched_show_numa(p, m);
1384}
1385
1386void proc_sched_set_task(struct task_struct *p)
1387{
1388#ifdef CONFIG_SCHEDSTATS
1389 memset(&p->stats, 0, sizeof(p->stats));
1390#endif
1391}
1392
1393void resched_latency_warn(int cpu, u64 latency)
1394{
1395 static DEFINE_RATELIMIT_STATE(latency_check_ratelimit, 60 * 60 * HZ, 1);
1396
1397 if (likely(!__ratelimit(&latency_check_ratelimit)))
1398 return;
1399
1400 pr_err("sched: CPU %d need_resched set for > %llu ns (%d ticks) without schedule\n",
1401 cpu, latency, cpu_rq(cpu)->ticks_without_resched);
1402 dump_stack();
1403}