1 // SPDX-License-Identifier: GPL-2.0-only
5 * Print the CFS rbtree and other debugging details
7 * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar
12 * This allows printing both to /proc/sched_debug and
15 #define SEQ_printf(m, x...) \
24 * Ease the printing of nsec fields:
26 static long long nsec_high(unsigned long long nsec)
28 if ((long long)nsec < 0) {
30 do_div(nsec, 1000000);
33 do_div(nsec, 1000000);
38 static unsigned long nsec_low(unsigned long long nsec)
40 if ((long long)nsec < 0)
43 return do_div(nsec, 1000000);
46 #define SPLIT_NS(x) nsec_high(x), nsec_low(x)
48 #define SCHED_FEAT(name, enabled) \
51 static const char * const sched_feat_names[] = {
57 static int sched_feat_show(struct seq_file *m, void *v)
61 for (i = 0; i < __SCHED_FEAT_NR; i++) {
62 if (!(sysctl_sched_features & (1UL << i)))
64 seq_printf(m, "%s ", sched_feat_names[i]);
71 #ifdef CONFIG_JUMP_LABEL
73 #define jump_label_key__true STATIC_KEY_INIT_TRUE
74 #define jump_label_key__false STATIC_KEY_INIT_FALSE
76 #define SCHED_FEAT(name, enabled) \
77 jump_label_key__##enabled ,
79 struct static_key sched_feat_keys[__SCHED_FEAT_NR] = {
85 static void sched_feat_disable(int i)
87 static_key_disable_cpuslocked(&sched_feat_keys[i]);
90 static void sched_feat_enable(int i)
92 static_key_enable_cpuslocked(&sched_feat_keys[i]);
95 static void sched_feat_disable(int i) { };
96 static void sched_feat_enable(int i) { };
97 #endif /* CONFIG_JUMP_LABEL */
99 static int sched_feat_set(char *cmp)
104 if (strncmp(cmp, "NO_", 3) == 0) {
109 i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp);
114 sysctl_sched_features &= ~(1UL << i);
115 sched_feat_disable(i);
117 sysctl_sched_features |= (1UL << i);
118 sched_feat_enable(i);
125 sched_feat_write(struct file *filp, const char __user *ubuf,
126 size_t cnt, loff_t *ppos)
136 if (copy_from_user(&buf, ubuf, cnt))
142 /* Ensure the static_key remains in a consistent state */
143 inode = file_inode(filp);
146 ret = sched_feat_set(cmp);
157 static int sched_feat_open(struct inode *inode, struct file *filp)
159 return single_open(filp, sched_feat_show, NULL);
162 static const struct file_operations sched_feat_fops = {
163 .open = sched_feat_open,
164 .write = sched_feat_write,
167 .release = single_release,
172 static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
173 size_t cnt, loff_t *ppos)
176 unsigned int scaling;
181 if (copy_from_user(&buf, ubuf, cnt))
185 if (kstrtouint(buf, 10, &scaling))
188 if (scaling >= SCHED_TUNABLESCALING_END)
191 sysctl_sched_tunable_scaling = scaling;
192 if (sched_update_scaling())
199 static int sched_scaling_show(struct seq_file *m, void *v)
201 seq_printf(m, "%d\n", sysctl_sched_tunable_scaling);
205 static int sched_scaling_open(struct inode *inode, struct file *filp)
207 return single_open(filp, sched_scaling_show, NULL);
210 static const struct file_operations sched_scaling_fops = {
211 .open = sched_scaling_open,
212 .write = sched_scaling_write,
215 .release = single_release,
220 #ifdef CONFIG_PREEMPT_DYNAMIC
222 static ssize_t sched_dynamic_write(struct file *filp, const char __user *ubuf,
223 size_t cnt, loff_t *ppos)
231 if (copy_from_user(&buf, ubuf, cnt))
235 mode = sched_dynamic_mode(strstrip(buf));
239 sched_dynamic_update(mode);
246 static int sched_dynamic_show(struct seq_file *m, void *v)
248 static const char * preempt_modes[] = {
249 "none", "voluntary", "full"
253 for (i = 0; i < ARRAY_SIZE(preempt_modes); i++) {
254 if (preempt_dynamic_mode == i)
256 seq_puts(m, preempt_modes[i]);
257 if (preempt_dynamic_mode == i)
267 static int sched_dynamic_open(struct inode *inode, struct file *filp)
269 return single_open(filp, sched_dynamic_show, NULL);
272 static const struct file_operations sched_dynamic_fops = {
273 .open = sched_dynamic_open,
274 .write = sched_dynamic_write,
277 .release = single_release,
280 #endif /* CONFIG_PREEMPT_DYNAMIC */
282 __read_mostly bool sched_debug_verbose;
284 static const struct seq_operations sched_debug_sops;
286 static int sched_debug_open(struct inode *inode, struct file *filp)
288 return seq_open(filp, &sched_debug_sops);
291 static const struct file_operations sched_debug_fops = {
292 .open = sched_debug_open,
295 .release = seq_release,
298 static struct dentry *debugfs_sched;
300 static __init int sched_init_debug(void)
302 struct dentry __maybe_unused *numa;
304 debugfs_sched = debugfs_create_dir("sched", NULL);
306 debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops);
307 debugfs_create_bool("verbose", 0644, debugfs_sched, &sched_debug_verbose);
308 #ifdef CONFIG_PREEMPT_DYNAMIC
309 debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
312 debugfs_create_u32("latency_ns", 0644, debugfs_sched, &sysctl_sched_latency);
313 debugfs_create_u32("min_granularity_ns", 0644, debugfs_sched, &sysctl_sched_min_granularity);
314 debugfs_create_u32("wakeup_granularity_ns", 0644, debugfs_sched, &sysctl_sched_wakeup_granularity);
316 debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
317 debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
320 debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
321 debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
322 debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
324 mutex_lock(&sched_domains_mutex);
325 update_sched_domain_debugfs();
326 mutex_unlock(&sched_domains_mutex);
329 #ifdef CONFIG_NUMA_BALANCING
330 numa = debugfs_create_dir("numa_balancing", debugfs_sched);
332 debugfs_create_u32("scan_delay_ms", 0644, numa, &sysctl_numa_balancing_scan_delay);
333 debugfs_create_u32("scan_period_min_ms", 0644, numa, &sysctl_numa_balancing_scan_period_min);
334 debugfs_create_u32("scan_period_max_ms", 0644, numa, &sysctl_numa_balancing_scan_period_max);
335 debugfs_create_u32("scan_size_mb", 0644, numa, &sysctl_numa_balancing_scan_size);
338 debugfs_create_file("debug", 0444, debugfs_sched, NULL, &sched_debug_fops);
342 late_initcall(sched_init_debug);
346 static cpumask_var_t sd_sysctl_cpus;
347 static struct dentry *sd_dentry;
349 static int sd_flags_show(struct seq_file *m, void *v)
351 unsigned long flags = *(unsigned int *)m->private;
354 for_each_set_bit(idx, &flags, __SD_FLAG_CNT) {
355 seq_puts(m, sd_flag_debug[idx].name);
363 static int sd_flags_open(struct inode *inode, struct file *file)
365 return single_open(file, sd_flags_show, inode->i_private);
368 static const struct file_operations sd_flags_fops = {
369 .open = sd_flags_open,
372 .release = single_release,
375 static void register_sd(struct sched_domain *sd, struct dentry *parent)
377 #define SDM(type, mode, member) \
378 debugfs_create_##type(#member, mode, parent, &sd->member)
380 SDM(ulong, 0644, min_interval);
381 SDM(ulong, 0644, max_interval);
382 SDM(u64, 0644, max_newidle_lb_cost);
383 SDM(u32, 0644, busy_factor);
384 SDM(u32, 0644, imbalance_pct);
385 SDM(u32, 0644, cache_nice_tries);
386 SDM(str, 0444, name);
390 debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops);
393 void update_sched_domain_debugfs(void)
398 * This can unfortunately be invoked before sched_debug_init() creates
399 * the debug directory. Don't touch sd_sysctl_cpus until then.
404 if (!cpumask_available(sd_sysctl_cpus)) {
405 if (!alloc_cpumask_var(&sd_sysctl_cpus, GFP_KERNEL))
407 cpumask_copy(sd_sysctl_cpus, cpu_possible_mask);
411 sd_dentry = debugfs_create_dir("domains", debugfs_sched);
413 for_each_cpu(cpu, sd_sysctl_cpus) {
414 struct sched_domain *sd;
415 struct dentry *d_cpu;
418 snprintf(buf, sizeof(buf), "cpu%d", cpu);
419 debugfs_lookup_and_remove(buf, sd_dentry);
420 d_cpu = debugfs_create_dir(buf, sd_dentry);
423 for_each_domain(cpu, sd) {
426 snprintf(buf, sizeof(buf), "domain%d", i);
427 d_sd = debugfs_create_dir(buf, d_cpu);
429 register_sd(sd, d_sd);
433 __cpumask_clear_cpu(cpu, sd_sysctl_cpus);
437 void dirty_sched_domain_sysctl(int cpu)
439 if (cpumask_available(sd_sysctl_cpus))
440 __cpumask_set_cpu(cpu, sd_sysctl_cpus);
443 #endif /* CONFIG_SMP */
445 #ifdef CONFIG_FAIR_GROUP_SCHED
446 static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
448 struct sched_entity *se = tg->se[cpu];
450 #define P(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
451 #define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)schedstat_val(F))
452 #define PN(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
453 #define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(F)))
460 PN(se->sum_exec_runtime);
462 if (schedstat_enabled()) {
463 PN_SCHEDSTAT(se->statistics.wait_start);
464 PN_SCHEDSTAT(se->statistics.sleep_start);
465 PN_SCHEDSTAT(se->statistics.block_start);
466 PN_SCHEDSTAT(se->statistics.sleep_max);
467 PN_SCHEDSTAT(se->statistics.block_max);
468 PN_SCHEDSTAT(se->statistics.exec_max);
469 PN_SCHEDSTAT(se->statistics.slice_max);
470 PN_SCHEDSTAT(se->statistics.wait_max);
471 PN_SCHEDSTAT(se->statistics.wait_sum);
472 P_SCHEDSTAT(se->statistics.wait_count);
479 P(se->avg.runnable_avg);
489 #ifdef CONFIG_CGROUP_SCHED
490 static DEFINE_SPINLOCK(sched_debug_lock);
491 static char group_path[PATH_MAX];
493 static void task_group_path(struct task_group *tg, char *path, int plen)
495 if (autogroup_path(tg, path, plen))
498 cgroup_path(tg->css.cgroup, path, plen);
502 * Only 1 SEQ_printf_task_group_path() caller can use the full length
503 * group_path[] for cgroup path. Other simultaneous callers will have
504 * to use a shorter stack buffer. A "..." suffix is appended at the end
505 * of the stack buffer so that it will show up in case the output length
506 * matches the given buffer size to indicate possible path name truncation.
508 #define SEQ_printf_task_group_path(m, tg, fmt...) \
510 if (spin_trylock(&sched_debug_lock)) { \
511 task_group_path(tg, group_path, sizeof(group_path)); \
512 SEQ_printf(m, fmt, group_path); \
513 spin_unlock(&sched_debug_lock); \
516 char *bufend = buf + sizeof(buf) - 3; \
517 task_group_path(tg, buf, bufend - buf); \
518 strcpy(bufend - 1, "..."); \
519 SEQ_printf(m, fmt, buf); \
525 print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
527 if (task_current(rq, p))
530 SEQ_printf(m, " %c", task_state_to_char(p));
532 SEQ_printf(m, " %15s %5d %9Ld.%06ld %9Ld %5d ",
533 p->comm, task_pid_nr(p),
534 SPLIT_NS(p->se.vruntime),
535 (long long)(p->nvcsw + p->nivcsw),
538 SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
539 SPLIT_NS(schedstat_val_or_zero(p->se.statistics.wait_sum)),
540 SPLIT_NS(p->se.sum_exec_runtime),
541 SPLIT_NS(schedstat_val_or_zero(p->se.statistics.sum_sleep_runtime)));
543 #ifdef CONFIG_NUMA_BALANCING
544 SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
546 #ifdef CONFIG_CGROUP_SCHED
547 SEQ_printf_task_group_path(m, task_group(p), " %s")
553 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
555 struct task_struct *g, *p;
558 SEQ_printf(m, "runnable tasks:\n");
559 SEQ_printf(m, " S task PID tree-key switches prio"
560 " wait-time sum-exec sum-sleep\n");
561 SEQ_printf(m, "-------------------------------------------------------"
562 "------------------------------------------------------\n");
565 for_each_process_thread(g, p) {
566 if (task_cpu(p) != rq_cpu)
569 print_task(m, rq, p);
574 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
576 s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
577 spread, rq0_min_vruntime, spread0;
578 struct rq *rq = cpu_rq(cpu);
579 struct sched_entity *last;
582 #ifdef CONFIG_FAIR_GROUP_SCHED
584 SEQ_printf_task_group_path(m, cfs_rq->tg, "cfs_rq[%d]:%s\n", cpu);
587 SEQ_printf(m, "cfs_rq[%d]:\n", cpu);
589 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
590 SPLIT_NS(cfs_rq->exec_clock));
592 raw_spin_rq_lock_irqsave(rq, flags);
593 if (rb_first_cached(&cfs_rq->tasks_timeline))
594 MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime;
595 last = __pick_last_entity(cfs_rq);
597 max_vruntime = last->vruntime;
598 min_vruntime = cfs_rq->min_vruntime;
599 rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
600 raw_spin_rq_unlock_irqrestore(rq, flags);
601 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
602 SPLIT_NS(MIN_vruntime));
603 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
604 SPLIT_NS(min_vruntime));
605 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
606 SPLIT_NS(max_vruntime));
607 spread = max_vruntime - MIN_vruntime;
608 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
610 spread0 = min_vruntime - rq0_min_vruntime;
611 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
613 SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over",
614 cfs_rq->nr_spread_over);
615 SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
616 SEQ_printf(m, " .%-30s: %d\n", "h_nr_running", cfs_rq->h_nr_running);
617 SEQ_printf(m, " .%-30s: %d\n", "idle_h_nr_running",
618 cfs_rq->idle_h_nr_running);
619 SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
621 SEQ_printf(m, " .%-30s: %lu\n", "load_avg",
622 cfs_rq->avg.load_avg);
623 SEQ_printf(m, " .%-30s: %lu\n", "runnable_avg",
624 cfs_rq->avg.runnable_avg);
625 SEQ_printf(m, " .%-30s: %lu\n", "util_avg",
626 cfs_rq->avg.util_avg);
627 SEQ_printf(m, " .%-30s: %u\n", "util_est_enqueued",
628 cfs_rq->avg.util_est.enqueued);
629 SEQ_printf(m, " .%-30s: %ld\n", "removed.load_avg",
630 cfs_rq->removed.load_avg);
631 SEQ_printf(m, " .%-30s: %ld\n", "removed.util_avg",
632 cfs_rq->removed.util_avg);
633 SEQ_printf(m, " .%-30s: %ld\n", "removed.runnable_avg",
634 cfs_rq->removed.runnable_avg);
635 #ifdef CONFIG_FAIR_GROUP_SCHED
636 SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib",
637 cfs_rq->tg_load_avg_contrib);
638 SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg",
639 atomic_long_read(&cfs_rq->tg->load_avg));
642 #ifdef CONFIG_CFS_BANDWIDTH
643 SEQ_printf(m, " .%-30s: %d\n", "throttled",
645 SEQ_printf(m, " .%-30s: %d\n", "throttle_count",
646 cfs_rq->throttle_count);
649 #ifdef CONFIG_FAIR_GROUP_SCHED
650 print_cfs_group_stats(m, cpu, cfs_rq->tg);
654 void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
656 #ifdef CONFIG_RT_GROUP_SCHED
658 SEQ_printf_task_group_path(m, rt_rq->tg, "rt_rq[%d]:%s\n", cpu);
661 SEQ_printf(m, "rt_rq[%d]:\n", cpu);
665 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
667 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(rt_rq->x))
669 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))
684 void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq)
689 SEQ_printf(m, "dl_rq[%d]:\n", cpu);
692 SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x))
697 dl_bw = &cpu_rq(cpu)->rd->dl_bw;
699 dl_bw = &dl_rq->dl_bw;
701 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw);
702 SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw);
707 static void print_cpu(struct seq_file *m, int cpu)
709 struct rq *rq = cpu_rq(cpu);
713 unsigned int freq = cpu_khz ? : 1;
715 SEQ_printf(m, "cpu#%d, %u.%03u MHz\n",
716 cpu, freq / 1000, (freq % 1000));
719 SEQ_printf(m, "cpu#%d\n", cpu);
724 if (sizeof(rq->x) == 4) \
725 SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \
727 SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\
731 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
735 P(nr_uninterruptible);
737 SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr)));
744 #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
746 P64(max_idle_balance_cost);
750 #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, schedstat_val(rq->n));
751 if (schedstat_enabled()) {
760 print_cfs_stats(m, cpu);
761 print_rt_stats(m, cpu);
762 print_dl_stats(m, cpu);
764 print_rq(m, rq, cpu);
768 static const char *sched_tunable_scaling_names[] = {
774 static void sched_debug_header(struct seq_file *m)
776 u64 ktime, sched_clk, cpu_clk;
779 local_irq_save(flags);
780 ktime = ktime_to_ns(ktime_get());
781 sched_clk = sched_clock();
782 cpu_clk = local_clock();
783 local_irq_restore(flags);
785 SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
786 init_utsname()->release,
787 (int)strcspn(init_utsname()->version, " "),
788 init_utsname()->version);
791 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
793 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
798 #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
799 P(sched_clock_stable());
805 SEQ_printf(m, "sysctl_sched\n");
808 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
810 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
811 PN(sysctl_sched_latency);
812 PN(sysctl_sched_min_granularity);
813 PN(sysctl_sched_wakeup_granularity);
814 P(sysctl_sched_child_runs_first);
815 P(sysctl_sched_features);
819 SEQ_printf(m, " .%-40s: %d (%s)\n",
820 "sysctl_sched_tunable_scaling",
821 sysctl_sched_tunable_scaling,
822 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
826 static int sched_debug_show(struct seq_file *m, void *v)
828 int cpu = (unsigned long)(v - 2);
833 sched_debug_header(m);
838 void sysrq_sched_debug_show(void)
842 sched_debug_header(NULL);
843 for_each_online_cpu(cpu) {
845 * Need to reset softlockup watchdogs on all CPUs, because
846 * another CPU might be blocked waiting for us to process
847 * an IPI or stop_machine.
849 touch_nmi_watchdog();
850 touch_all_softlockup_watchdogs();
851 print_cpu(NULL, cpu);
856 * This iterator needs some explanation.
857 * It returns 1 for the header position.
858 * This means 2 is CPU 0.
859 * In a hotplugged system some CPUs, including CPU 0, may be missing so we have
860 * to use cpumask_* to iterate over the CPUs.
862 static void *sched_debug_start(struct seq_file *file, loff_t *offset)
864 unsigned long n = *offset;
872 n = cpumask_next(n - 1, cpu_online_mask);
874 n = cpumask_first(cpu_online_mask);
879 return (void *)(unsigned long)(n + 2);
884 static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset)
887 return sched_debug_start(file, offset);
890 static void sched_debug_stop(struct seq_file *file, void *data)
894 static const struct seq_operations sched_debug_sops = {
895 .start = sched_debug_start,
896 .next = sched_debug_next,
897 .stop = sched_debug_stop,
898 .show = sched_debug_show,
901 #define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F))
902 #define __P(F) __PS(#F, F)
903 #define P(F) __PS(#F, p->F)
904 #define PM(F, M) __PS(#F, p->F & (M))
905 #define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F)))
906 #define __PN(F) __PSN(#F, F)
907 #define PN(F) __PSN(#F, p->F)
910 #ifdef CONFIG_NUMA_BALANCING
911 void print_numa_stats(struct seq_file *m, int node, unsigned long tsf,
912 unsigned long tpf, unsigned long gsf, unsigned long gpf)
914 SEQ_printf(m, "numa_faults node=%d ", node);
915 SEQ_printf(m, "task_private=%lu task_shared=%lu ", tpf, tsf);
916 SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gpf, gsf);
921 static void sched_show_numa(struct task_struct *p, struct seq_file *m)
923 #ifdef CONFIG_NUMA_BALANCING
925 P(mm->numa_scan_seq);
927 P(numa_pages_migrated);
928 P(numa_preferred_nid);
929 P(total_numa_faults);
930 SEQ_printf(m, "current_node=%d, numa_group_id=%d\n",
931 task_node(p), task_numa_group_id(p));
932 show_numa_stats(p, m);
936 void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
939 unsigned long nr_switches;
941 SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr_ns(p, ns),
944 "---------------------------------------------------------"
947 #define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->F))
948 #define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->F))
952 PN(se.sum_exec_runtime);
954 nr_switches = p->nvcsw + p->nivcsw;
958 if (schedstat_enabled()) {
959 u64 avg_atom, avg_per_cpu;
961 PN_SCHEDSTAT(se.statistics.sum_sleep_runtime);
962 PN_SCHEDSTAT(se.statistics.wait_start);
963 PN_SCHEDSTAT(se.statistics.sleep_start);
964 PN_SCHEDSTAT(se.statistics.block_start);
965 PN_SCHEDSTAT(se.statistics.sleep_max);
966 PN_SCHEDSTAT(se.statistics.block_max);
967 PN_SCHEDSTAT(se.statistics.exec_max);
968 PN_SCHEDSTAT(se.statistics.slice_max);
969 PN_SCHEDSTAT(se.statistics.wait_max);
970 PN_SCHEDSTAT(se.statistics.wait_sum);
971 P_SCHEDSTAT(se.statistics.wait_count);
972 PN_SCHEDSTAT(se.statistics.iowait_sum);
973 P_SCHEDSTAT(se.statistics.iowait_count);
974 P_SCHEDSTAT(se.statistics.nr_migrations_cold);
975 P_SCHEDSTAT(se.statistics.nr_failed_migrations_affine);
976 P_SCHEDSTAT(se.statistics.nr_failed_migrations_running);
977 P_SCHEDSTAT(se.statistics.nr_failed_migrations_hot);
978 P_SCHEDSTAT(se.statistics.nr_forced_migrations);
979 P_SCHEDSTAT(se.statistics.nr_wakeups);
980 P_SCHEDSTAT(se.statistics.nr_wakeups_sync);
981 P_SCHEDSTAT(se.statistics.nr_wakeups_migrate);
982 P_SCHEDSTAT(se.statistics.nr_wakeups_local);
983 P_SCHEDSTAT(se.statistics.nr_wakeups_remote);
984 P_SCHEDSTAT(se.statistics.nr_wakeups_affine);
985 P_SCHEDSTAT(se.statistics.nr_wakeups_affine_attempts);
986 P_SCHEDSTAT(se.statistics.nr_wakeups_passive);
987 P_SCHEDSTAT(se.statistics.nr_wakeups_idle);
989 avg_atom = p->se.sum_exec_runtime;
991 avg_atom = div64_ul(avg_atom, nr_switches);
995 avg_per_cpu = p->se.sum_exec_runtime;
996 if (p->se.nr_migrations) {
997 avg_per_cpu = div64_u64(avg_per_cpu,
998 p->se.nr_migrations);
1008 __PS("nr_voluntary_switches", p->nvcsw);
1009 __PS("nr_involuntary_switches", p->nivcsw);
1014 P(se.avg.runnable_sum);
1017 P(se.avg.runnable_avg);
1019 P(se.avg.last_update_time);
1020 P(se.avg.util_est.ewma);
1021 PM(se.avg.util_est.enqueued, ~UTIL_AVG_UNCHANGED);
1023 #ifdef CONFIG_UCLAMP_TASK
1024 __PS("uclamp.min", p->uclamp_req[UCLAMP_MIN].value);
1025 __PS("uclamp.max", p->uclamp_req[UCLAMP_MAX].value);
1026 __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN));
1027 __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX));
1031 if (task_has_dl_policy(p)) {
1039 unsigned int this_cpu = raw_smp_processor_id();
1042 t0 = cpu_clock(this_cpu);
1043 t1 = cpu_clock(this_cpu);
1044 __PS("clock-delta", t1-t0);
1047 sched_show_numa(p, m);
1050 void proc_sched_set_task(struct task_struct *p)
1052 #ifdef CONFIG_SCHEDSTATS
1053 memset(&p->se.statistics, 0, sizeof(p->se.statistics));
1057 void resched_latency_warn(int cpu, u64 latency)
1059 static DEFINE_RATELIMIT_STATE(latency_check_ratelimit, 60 * 60 * HZ, 1);
1061 WARN(__ratelimit(&latency_check_ratelimit),
1062 "sched: CPU %d need_resched set for > %llu ns (%d ticks) "
1063 "without schedule\n",
1064 cpu, latency, cpu_rq(cpu)->ticks_without_resched);