Commit | Line | Data |
---|---|---|
43ae34cb | 1 | /* |
391e43da | 2 | * kernel/sched/debug.c |
43ae34cb IM |
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> | |
b32e86b4 | 18 | #include <linux/mempolicy.h> |
d6ca41d7 | 19 | #include <linux/debugfs.h> |
43ae34cb | 20 | |
029632fb PZ |
21 | #include "sched.h" |
22 | ||
efe25c2c BR |
23 | static DEFINE_SPINLOCK(sched_debug_lock); |
24 | ||
43ae34cb IM |
25 | /* |
26 | * This allows printing both to /proc/sched_debug and | |
27 | * to the console | |
28 | */ | |
29 | #define SEQ_printf(m, x...) \ | |
30 | do { \ | |
31 | if (m) \ | |
32 | seq_printf(m, x); \ | |
33 | else \ | |
34 | printk(x); \ | |
35 | } while (0) | |
36 | ||
ef83a571 IM |
37 | /* |
38 | * Ease the printing of nsec fields: | |
39 | */ | |
90b2628f | 40 | static long long nsec_high(unsigned long long nsec) |
ef83a571 | 41 | { |
90b2628f | 42 | if ((long long)nsec < 0) { |
ef83a571 IM |
43 | nsec = -nsec; |
44 | do_div(nsec, 1000000); | |
45 | return -nsec; | |
46 | } | |
47 | do_div(nsec, 1000000); | |
48 | ||
49 | return nsec; | |
50 | } | |
51 | ||
90b2628f | 52 | static unsigned long nsec_low(unsigned long long nsec) |
ef83a571 | 53 | { |
90b2628f | 54 | if ((long long)nsec < 0) |
ef83a571 IM |
55 | nsec = -nsec; |
56 | ||
57 | return do_div(nsec, 1000000); | |
58 | } | |
59 | ||
60 | #define SPLIT_NS(x) nsec_high(x), nsec_low(x) | |
61 | ||
d6ca41d7 SRRH |
62 | #define SCHED_FEAT(name, enabled) \ |
63 | #name , | |
64 | ||
65 | static const char * const sched_feat_names[] = { | |
66 | #include "features.h" | |
67 | }; | |
68 | ||
69 | #undef SCHED_FEAT | |
70 | ||
71 | static int sched_feat_show(struct seq_file *m, void *v) | |
72 | { | |
73 | int i; | |
74 | ||
75 | for (i = 0; i < __SCHED_FEAT_NR; i++) { | |
76 | if (!(sysctl_sched_features & (1UL << i))) | |
77 | seq_puts(m, "NO_"); | |
78 | seq_printf(m, "%s ", sched_feat_names[i]); | |
79 | } | |
80 | seq_puts(m, "\n"); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | #ifdef HAVE_JUMP_LABEL | |
86 | ||
87 | #define jump_label_key__true STATIC_KEY_INIT_TRUE | |
88 | #define jump_label_key__false STATIC_KEY_INIT_FALSE | |
89 | ||
90 | #define SCHED_FEAT(name, enabled) \ | |
91 | jump_label_key__##enabled , | |
92 | ||
93 | struct static_key sched_feat_keys[__SCHED_FEAT_NR] = { | |
94 | #include "features.h" | |
95 | }; | |
96 | ||
97 | #undef SCHED_FEAT | |
98 | ||
99 | static void sched_feat_disable(int i) | |
100 | { | |
101 | static_key_disable(&sched_feat_keys[i]); | |
102 | } | |
103 | ||
104 | static void sched_feat_enable(int i) | |
105 | { | |
106 | static_key_enable(&sched_feat_keys[i]); | |
107 | } | |
108 | #else | |
109 | static void sched_feat_disable(int i) { }; | |
110 | static void sched_feat_enable(int i) { }; | |
111 | #endif /* HAVE_JUMP_LABEL */ | |
112 | ||
113 | static int sched_feat_set(char *cmp) | |
114 | { | |
115 | int i; | |
116 | int neg = 0; | |
117 | ||
118 | if (strncmp(cmp, "NO_", 3) == 0) { | |
119 | neg = 1; | |
120 | cmp += 3; | |
121 | } | |
122 | ||
123 | for (i = 0; i < __SCHED_FEAT_NR; i++) { | |
124 | if (strcmp(cmp, sched_feat_names[i]) == 0) { | |
125 | if (neg) { | |
126 | sysctl_sched_features &= ~(1UL << i); | |
127 | sched_feat_disable(i); | |
128 | } else { | |
129 | sysctl_sched_features |= (1UL << i); | |
130 | sched_feat_enable(i); | |
131 | } | |
132 | break; | |
133 | } | |
134 | } | |
135 | ||
136 | return i; | |
137 | } | |
138 | ||
139 | static ssize_t | |
140 | sched_feat_write(struct file *filp, const char __user *ubuf, | |
141 | size_t cnt, loff_t *ppos) | |
142 | { | |
143 | char buf[64]; | |
144 | char *cmp; | |
145 | int i; | |
146 | struct inode *inode; | |
147 | ||
148 | if (cnt > 63) | |
149 | cnt = 63; | |
150 | ||
151 | if (copy_from_user(&buf, ubuf, cnt)) | |
152 | return -EFAULT; | |
153 | ||
154 | buf[cnt] = 0; | |
155 | cmp = strstrip(buf); | |
156 | ||
157 | /* Ensure the static_key remains in a consistent state */ | |
158 | inode = file_inode(filp); | |
159 | inode_lock(inode); | |
160 | i = sched_feat_set(cmp); | |
161 | inode_unlock(inode); | |
162 | if (i == __SCHED_FEAT_NR) | |
163 | return -EINVAL; | |
164 | ||
165 | *ppos += cnt; | |
166 | ||
167 | return cnt; | |
168 | } | |
169 | ||
170 | static int sched_feat_open(struct inode *inode, struct file *filp) | |
171 | { | |
172 | return single_open(filp, sched_feat_show, NULL); | |
173 | } | |
174 | ||
175 | static const struct file_operations sched_feat_fops = { | |
176 | .open = sched_feat_open, | |
177 | .write = sched_feat_write, | |
178 | .read = seq_read, | |
179 | .llseek = seq_lseek, | |
180 | .release = single_release, | |
181 | }; | |
182 | ||
183 | static __init int sched_init_debug(void) | |
184 | { | |
185 | debugfs_create_file("sched_features", 0644, NULL, NULL, | |
186 | &sched_feat_fops); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | late_initcall(sched_init_debug); | |
191 | ||
3866e845 SRRH |
192 | #ifdef CONFIG_SMP |
193 | ||
194 | #ifdef CONFIG_SYSCTL | |
195 | ||
196 | static struct ctl_table sd_ctl_dir[] = { | |
197 | { | |
198 | .procname = "sched_domain", | |
199 | .mode = 0555, | |
200 | }, | |
201 | {} | |
202 | }; | |
203 | ||
204 | static struct ctl_table sd_ctl_root[] = { | |
205 | { | |
206 | .procname = "kernel", | |
207 | .mode = 0555, | |
208 | .child = sd_ctl_dir, | |
209 | }, | |
210 | {} | |
211 | }; | |
212 | ||
213 | static struct ctl_table *sd_alloc_ctl_entry(int n) | |
214 | { | |
215 | struct ctl_table *entry = | |
216 | kcalloc(n, sizeof(struct ctl_table), GFP_KERNEL); | |
217 | ||
218 | return entry; | |
219 | } | |
220 | ||
221 | static void sd_free_ctl_entry(struct ctl_table **tablep) | |
222 | { | |
223 | struct ctl_table *entry; | |
224 | ||
225 | /* | |
226 | * In the intermediate directories, both the child directory and | |
227 | * procname are dynamically allocated and could fail but the mode | |
228 | * will always be set. In the lowest directory the names are | |
229 | * static strings and all have proc handlers. | |
230 | */ | |
231 | for (entry = *tablep; entry->mode; entry++) { | |
232 | if (entry->child) | |
233 | sd_free_ctl_entry(&entry->child); | |
234 | if (entry->proc_handler == NULL) | |
235 | kfree(entry->procname); | |
236 | } | |
237 | ||
238 | kfree(*tablep); | |
239 | *tablep = NULL; | |
240 | } | |
241 | ||
242 | static int min_load_idx = 0; | |
243 | static int max_load_idx = CPU_LOAD_IDX_MAX-1; | |
244 | ||
245 | static void | |
246 | set_table_entry(struct ctl_table *entry, | |
247 | const char *procname, void *data, int maxlen, | |
248 | umode_t mode, proc_handler *proc_handler, | |
249 | bool load_idx) | |
250 | { | |
251 | entry->procname = procname; | |
252 | entry->data = data; | |
253 | entry->maxlen = maxlen; | |
254 | entry->mode = mode; | |
255 | entry->proc_handler = proc_handler; | |
256 | ||
257 | if (load_idx) { | |
258 | entry->extra1 = &min_load_idx; | |
259 | entry->extra2 = &max_load_idx; | |
260 | } | |
261 | } | |
262 | ||
263 | static struct ctl_table * | |
264 | sd_alloc_ctl_domain_table(struct sched_domain *sd) | |
265 | { | |
266 | struct ctl_table *table = sd_alloc_ctl_entry(14); | |
267 | ||
268 | if (table == NULL) | |
269 | return NULL; | |
270 | ||
271 | set_table_entry(&table[0], "min_interval", &sd->min_interval, | |
272 | sizeof(long), 0644, proc_doulongvec_minmax, false); | |
273 | set_table_entry(&table[1], "max_interval", &sd->max_interval, | |
274 | sizeof(long), 0644, proc_doulongvec_minmax, false); | |
275 | set_table_entry(&table[2], "busy_idx", &sd->busy_idx, | |
276 | sizeof(int), 0644, proc_dointvec_minmax, true); | |
277 | set_table_entry(&table[3], "idle_idx", &sd->idle_idx, | |
278 | sizeof(int), 0644, proc_dointvec_minmax, true); | |
279 | set_table_entry(&table[4], "newidle_idx", &sd->newidle_idx, | |
280 | sizeof(int), 0644, proc_dointvec_minmax, true); | |
281 | set_table_entry(&table[5], "wake_idx", &sd->wake_idx, | |
282 | sizeof(int), 0644, proc_dointvec_minmax, true); | |
283 | set_table_entry(&table[6], "forkexec_idx", &sd->forkexec_idx, | |
284 | sizeof(int), 0644, proc_dointvec_minmax, true); | |
285 | set_table_entry(&table[7], "busy_factor", &sd->busy_factor, | |
286 | sizeof(int), 0644, proc_dointvec_minmax, false); | |
287 | set_table_entry(&table[8], "imbalance_pct", &sd->imbalance_pct, | |
288 | sizeof(int), 0644, proc_dointvec_minmax, false); | |
289 | set_table_entry(&table[9], "cache_nice_tries", | |
290 | &sd->cache_nice_tries, | |
291 | sizeof(int), 0644, proc_dointvec_minmax, false); | |
292 | set_table_entry(&table[10], "flags", &sd->flags, | |
293 | sizeof(int), 0644, proc_dointvec_minmax, false); | |
294 | set_table_entry(&table[11], "max_newidle_lb_cost", | |
295 | &sd->max_newidle_lb_cost, | |
296 | sizeof(long), 0644, proc_doulongvec_minmax, false); | |
297 | set_table_entry(&table[12], "name", sd->name, | |
298 | CORENAME_MAX_SIZE, 0444, proc_dostring, false); | |
299 | /* &table[13] is terminator */ | |
300 | ||
301 | return table; | |
302 | } | |
303 | ||
304 | static struct ctl_table *sd_alloc_ctl_cpu_table(int cpu) | |
305 | { | |
306 | struct ctl_table *entry, *table; | |
307 | struct sched_domain *sd; | |
308 | int domain_num = 0, i; | |
309 | char buf[32]; | |
310 | ||
311 | for_each_domain(cpu, sd) | |
312 | domain_num++; | |
313 | entry = table = sd_alloc_ctl_entry(domain_num + 1); | |
314 | if (table == NULL) | |
315 | return NULL; | |
316 | ||
317 | i = 0; | |
318 | for_each_domain(cpu, sd) { | |
319 | snprintf(buf, 32, "domain%d", i); | |
320 | entry->procname = kstrdup(buf, GFP_KERNEL); | |
321 | entry->mode = 0555; | |
322 | entry->child = sd_alloc_ctl_domain_table(sd); | |
323 | entry++; | |
324 | i++; | |
325 | } | |
326 | return table; | |
327 | } | |
328 | ||
329 | static struct ctl_table_header *sd_sysctl_header; | |
330 | void register_sched_domain_sysctl(void) | |
331 | { | |
332 | int i, cpu_num = num_possible_cpus(); | |
333 | struct ctl_table *entry = sd_alloc_ctl_entry(cpu_num + 1); | |
334 | char buf[32]; | |
335 | ||
336 | WARN_ON(sd_ctl_dir[0].child); | |
337 | sd_ctl_dir[0].child = entry; | |
338 | ||
339 | if (entry == NULL) | |
340 | return; | |
341 | ||
342 | for_each_possible_cpu(i) { | |
343 | snprintf(buf, 32, "cpu%d", i); | |
344 | entry->procname = kstrdup(buf, GFP_KERNEL); | |
345 | entry->mode = 0555; | |
346 | entry->child = sd_alloc_ctl_cpu_table(i); | |
347 | entry++; | |
348 | } | |
349 | ||
350 | WARN_ON(sd_sysctl_header); | |
351 | sd_sysctl_header = register_sysctl_table(sd_ctl_root); | |
352 | } | |
353 | ||
354 | /* may be called multiple times per register */ | |
355 | void unregister_sched_domain_sysctl(void) | |
356 | { | |
357 | unregister_sysctl_table(sd_sysctl_header); | |
358 | sd_sysctl_header = NULL; | |
359 | if (sd_ctl_dir[0].child) | |
360 | sd_free_ctl_entry(&sd_ctl_dir[0].child); | |
361 | } | |
362 | #endif /* CONFIG_SYSCTL */ | |
363 | #endif /* CONFIG_SMP */ | |
364 | ||
ff9b48c3 | 365 | #ifdef CONFIG_FAIR_GROUP_SCHED |
5091faa4 | 366 | static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg) |
ff9b48c3 BR |
367 | { |
368 | struct sched_entity *se = tg->se[cpu]; | |
ff9b48c3 BR |
369 | |
370 | #define P(F) \ | |
371 | SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F) | |
372 | #define PN(F) \ | |
373 | SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
374 | ||
cd126afe | 375 | if (!se) |
18bf2805 | 376 | return; |
18bf2805 | 377 | |
ff9b48c3 BR |
378 | PN(se->exec_start); |
379 | PN(se->vruntime); | |
380 | PN(se->sum_exec_runtime); | |
381 | #ifdef CONFIG_SCHEDSTATS | |
cb251765 MG |
382 | if (schedstat_enabled()) { |
383 | PN(se->statistics.wait_start); | |
384 | PN(se->statistics.sleep_start); | |
385 | PN(se->statistics.block_start); | |
386 | PN(se->statistics.sleep_max); | |
387 | PN(se->statistics.block_max); | |
388 | PN(se->statistics.exec_max); | |
389 | PN(se->statistics.slice_max); | |
390 | PN(se->statistics.wait_max); | |
391 | PN(se->statistics.wait_sum); | |
392 | P(se->statistics.wait_count); | |
393 | } | |
ff9b48c3 BR |
394 | #endif |
395 | P(se->load.weight); | |
9d85f21c | 396 | #ifdef CONFIG_SMP |
9d89c257 YD |
397 | P(se->avg.load_avg); |
398 | P(se->avg.util_avg); | |
9d85f21c | 399 | #endif |
ff9b48c3 BR |
400 | #undef PN |
401 | #undef P | |
402 | } | |
403 | #endif | |
404 | ||
efe25c2c BR |
405 | #ifdef CONFIG_CGROUP_SCHED |
406 | static char group_path[PATH_MAX]; | |
407 | ||
408 | static char *task_group_path(struct task_group *tg) | |
409 | { | |
8ecedd7a BR |
410 | if (autogroup_path(tg, group_path, PATH_MAX)) |
411 | return group_path; | |
412 | ||
e61734c5 | 413 | return cgroup_path(tg->css.cgroup, group_path, PATH_MAX); |
efe25c2c BR |
414 | } |
415 | #endif | |
416 | ||
43ae34cb | 417 | static void |
a48da48b | 418 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) |
43ae34cb IM |
419 | { |
420 | if (rq->curr == p) | |
421 | SEQ_printf(m, "R"); | |
422 | else | |
423 | SEQ_printf(m, " "); | |
424 | ||
ef83a571 | 425 | SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ", |
fc840914 | 426 | p->comm, task_pid_nr(p), |
ef83a571 | 427 | SPLIT_NS(p->se.vruntime), |
43ae34cb | 428 | (long long)(p->nvcsw + p->nivcsw), |
6f605d83 | 429 | p->prio); |
9c572591 | 430 | |
33d6176e | 431 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", |
9c572591 | 432 | SPLIT_NS(schedstat_val(p, se.statistics.wait_sum)), |
33d6176e | 433 | SPLIT_NS(p->se.sum_exec_runtime), |
9c572591 JP |
434 | SPLIT_NS(schedstat_val(p, se.statistics.sum_sleep_runtime))); |
435 | ||
b32e86b4 | 436 | #ifdef CONFIG_NUMA_BALANCING |
e3d24d0a | 437 | SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); |
b32e86b4 | 438 | #endif |
efe25c2c BR |
439 | #ifdef CONFIG_CGROUP_SCHED |
440 | SEQ_printf(m, " %s", task_group_path(task_group(p))); | |
441 | #endif | |
d19ca308 | 442 | |
d19ca308 | 443 | SEQ_printf(m, "\n"); |
43ae34cb IM |
444 | } |
445 | ||
a48da48b | 446 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) |
43ae34cb IM |
447 | { |
448 | struct task_struct *g, *p; | |
449 | ||
450 | SEQ_printf(m, | |
451 | "\nrunnable tasks:\n" | |
c86da3a3 | 452 | " task PID tree-key switches prio" |
c5f3ab1c | 453 | " wait-time sum-exec sum-sleep\n" |
1a75b94f | 454 | "------------------------------------------------------" |
c86da3a3 | 455 | "----------------------------------------------------\n"); |
43ae34cb | 456 | |
5bd96ab6 | 457 | rcu_read_lock(); |
d38e83c7 | 458 | for_each_process_thread(g, p) { |
b32e86b4 | 459 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
460 | continue; |
461 | ||
a48da48b | 462 | print_task(m, rq, p); |
d38e83c7 | 463 | } |
5bd96ab6 | 464 | rcu_read_unlock(); |
43ae34cb IM |
465 | } |
466 | ||
5cef9eca | 467 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 468 | { |
86d9560c IM |
469 | s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, |
470 | spread, rq0_min_vruntime, spread0; | |
348ec61e | 471 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
472 | struct sched_entity *last; |
473 | unsigned long flags; | |
474 | ||
efe25c2c BR |
475 | #ifdef CONFIG_FAIR_GROUP_SCHED |
476 | SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); | |
477 | #else | |
ada18de2 | 478 | SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); |
efe25c2c | 479 | #endif |
ef83a571 IM |
480 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
481 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 482 | |
05fa785c | 483 | raw_spin_lock_irqsave(&rq->lock, flags); |
67e12eac | 484 | if (cfs_rq->rb_leftmost) |
ac53db59 | 485 | MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime; |
67e12eac IM |
486 | last = __pick_last_entity(cfs_rq); |
487 | if (last) | |
488 | max_vruntime = last->vruntime; | |
5ac5c4d6 | 489 | min_vruntime = cfs_rq->min_vruntime; |
348ec61e | 490 | rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime; |
05fa785c | 491 | raw_spin_unlock_irqrestore(&rq->lock, flags); |
ef83a571 IM |
492 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime", |
493 | SPLIT_NS(MIN_vruntime)); | |
494 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", | |
495 | SPLIT_NS(min_vruntime)); | |
496 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime", | |
497 | SPLIT_NS(max_vruntime)); | |
67e12eac | 498 | spread = max_vruntime - MIN_vruntime; |
ef83a571 IM |
499 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", |
500 | SPLIT_NS(spread)); | |
86d9560c | 501 | spread0 = min_vruntime - rq0_min_vruntime; |
ef83a571 IM |
502 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0", |
503 | SPLIT_NS(spread0)); | |
5ac5c4d6 | 504 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 505 | cfs_rq->nr_spread_over); |
c82513e5 | 506 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
2069dd75 | 507 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 508 | #ifdef CONFIG_SMP |
9d89c257 YD |
509 | SEQ_printf(m, " .%-30s: %lu\n", "load_avg", |
510 | cfs_rq->avg.load_avg); | |
13962234 YD |
511 | SEQ_printf(m, " .%-30s: %lu\n", "runnable_load_avg", |
512 | cfs_rq->runnable_load_avg); | |
9d89c257 YD |
513 | SEQ_printf(m, " .%-30s: %lu\n", "util_avg", |
514 | cfs_rq->avg.util_avg); | |
515 | SEQ_printf(m, " .%-30s: %ld\n", "removed_load_avg", | |
516 | atomic_long_read(&cfs_rq->removed_load_avg)); | |
517 | SEQ_printf(m, " .%-30s: %ld\n", "removed_util_avg", | |
518 | atomic_long_read(&cfs_rq->removed_util_avg)); | |
333bb864 | 519 | #ifdef CONFIG_FAIR_GROUP_SCHED |
9d89c257 YD |
520 | SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib", |
521 | cfs_rq->tg_load_avg_contrib); | |
333bb864 AS |
522 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
523 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
c09595f6 | 524 | #endif |
333bb864 | 525 | #endif |
f9f9ffc2 | 526 | #ifdef CONFIG_CFS_BANDWIDTH |
f9f9ffc2 BS |
527 | SEQ_printf(m, " .%-30s: %d\n", "throttled", |
528 | cfs_rq->throttled); | |
529 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
530 | cfs_rq->throttle_count); | |
531 | #endif | |
2069dd75 | 532 | |
333bb864 | 533 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 534 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 535 | #endif |
43ae34cb IM |
536 | } |
537 | ||
ada18de2 PZ |
538 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
539 | { | |
efe25c2c BR |
540 | #ifdef CONFIG_RT_GROUP_SCHED |
541 | SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); | |
542 | #else | |
ada18de2 | 543 | SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); |
efe25c2c | 544 | #endif |
ada18de2 PZ |
545 | |
546 | #define P(x) \ | |
547 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
548 | #define PN(x) \ | |
549 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
550 | ||
551 | P(rt_nr_running); | |
552 | P(rt_throttled); | |
553 | PN(rt_time); | |
554 | PN(rt_runtime); | |
555 | ||
556 | #undef PN | |
557 | #undef P | |
558 | } | |
559 | ||
acb32132 WL |
560 | void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq) |
561 | { | |
ef477183 SRRH |
562 | struct dl_bw *dl_bw; |
563 | ||
acb32132 WL |
564 | SEQ_printf(m, "\ndl_rq[%d]:\n", cpu); |
565 | SEQ_printf(m, " .%-30s: %ld\n", "dl_nr_running", dl_rq->dl_nr_running); | |
ef477183 SRRH |
566 | #ifdef CONFIG_SMP |
567 | dl_bw = &cpu_rq(cpu)->rd->dl_bw; | |
568 | #else | |
569 | dl_bw = &dl_rq->dl_bw; | |
570 | #endif | |
571 | SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw); | |
572 | SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw); | |
acb32132 WL |
573 | } |
574 | ||
5bb6b1ea PZ |
575 | extern __read_mostly int sched_clock_running; |
576 | ||
a48da48b | 577 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 578 | { |
348ec61e | 579 | struct rq *rq = cpu_rq(cpu); |
efe25c2c | 580 | unsigned long flags; |
43ae34cb IM |
581 | |
582 | #ifdef CONFIG_X86 | |
583 | { | |
584 | unsigned int freq = cpu_khz ? : 1; | |
585 | ||
bbbfeac9 | 586 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
587 | cpu, freq / 1000, (freq % 1000)); |
588 | } | |
589 | #else | |
bbbfeac9 | 590 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
591 | #endif |
592 | ||
13e099d2 PZ |
593 | #define P(x) \ |
594 | do { \ | |
595 | if (sizeof(rq->x) == 4) \ | |
596 | SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \ | |
597 | else \ | |
598 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
599 | } while (0) | |
600 | ||
ef83a571 IM |
601 | #define PN(x) \ |
602 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
603 | |
604 | P(nr_running); | |
605 | SEQ_printf(m, " .%-30s: %lu\n", "load", | |
495eca49 | 606 | rq->load.weight); |
43ae34cb IM |
607 | P(nr_switches); |
608 | P(nr_load_updates); | |
609 | P(nr_uninterruptible); | |
ef83a571 | 610 | PN(next_balance); |
fc840914 | 611 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 612 | PN(clock); |
5a537597 | 613 | PN(clock_task); |
43ae34cb IM |
614 | P(cpu_load[0]); |
615 | P(cpu_load[1]); | |
616 | P(cpu_load[2]); | |
617 | P(cpu_load[3]); | |
618 | P(cpu_load[4]); | |
619 | #undef P | |
ef83a571 | 620 | #undef PN |
43ae34cb | 621 | |
1b9508f6 | 622 | #ifdef CONFIG_SMP |
db6ea2fb | 623 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
1b9508f6 | 624 | P64(avg_idle); |
37e6bae8 | 625 | P64(max_idle_balance_cost); |
db6ea2fb | 626 | #undef P64 |
1b9508f6 | 627 | #endif |
5ac5c4d6 | 628 | |
db6ea2fb WL |
629 | #ifdef CONFIG_SCHEDSTATS |
630 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n); | |
631 | ||
cb251765 MG |
632 | if (schedstat_enabled()) { |
633 | P(yld_count); | |
634 | P(sched_count); | |
635 | P(sched_goidle); | |
636 | P(ttwu_count); | |
637 | P(ttwu_local); | |
638 | } | |
5ac5c4d6 | 639 | |
5ac5c4d6 PZ |
640 | #undef P |
641 | #endif | |
efe25c2c | 642 | spin_lock_irqsave(&sched_debug_lock, flags); |
5cef9eca | 643 | print_cfs_stats(m, cpu); |
ada18de2 | 644 | print_rt_stats(m, cpu); |
acb32132 | 645 | print_dl_stats(m, cpu); |
43ae34cb | 646 | |
a48da48b | 647 | print_rq(m, rq, cpu); |
efe25c2c | 648 | spin_unlock_irqrestore(&sched_debug_lock, flags); |
bbbfeac9 | 649 | SEQ_printf(m, "\n"); |
43ae34cb IM |
650 | } |
651 | ||
1983a922 CE |
652 | static const char *sched_tunable_scaling_names[] = { |
653 | "none", | |
654 | "logaritmic", | |
655 | "linear" | |
656 | }; | |
657 | ||
bbbfeac9 | 658 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 659 | { |
5bb6b1ea PZ |
660 | u64 ktime, sched_clk, cpu_clk; |
661 | unsigned long flags; | |
43ae34cb | 662 | |
5bb6b1ea PZ |
663 | local_irq_save(flags); |
664 | ktime = ktime_to_ns(ktime_get()); | |
665 | sched_clk = sched_clock(); | |
666 | cpu_clk = local_clock(); | |
667 | local_irq_restore(flags); | |
668 | ||
b32e86b4 | 669 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
670 | init_utsname()->release, |
671 | (int)strcspn(init_utsname()->version, " "), | |
672 | init_utsname()->version); | |
673 | ||
5bb6b1ea PZ |
674 | #define P(x) \ |
675 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
676 | #define PN(x) \ | |
677 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
678 | PN(ktime); | |
679 | PN(sched_clk); | |
680 | PN(cpu_clk); | |
681 | P(jiffies); | |
682 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 683 | P(sched_clock_stable()); |
5bb6b1ea PZ |
684 | #endif |
685 | #undef PN | |
686 | #undef P | |
687 | ||
688 | SEQ_printf(m, "\n"); | |
689 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 690 | |
1aa4731e | 691 | #define P(x) \ |
d822cece | 692 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 693 | #define PN(x) \ |
d822cece | 694 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
1aa4731e | 695 | PN(sysctl_sched_latency); |
b2be5e96 | 696 | PN(sysctl_sched_min_granularity); |
1aa4731e | 697 | PN(sysctl_sched_wakeup_granularity); |
eebef746 | 698 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
699 | P(sysctl_sched_features); |
700 | #undef PN | |
701 | #undef P | |
702 | ||
bbbfeac9 NZ |
703 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
704 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
705 | sysctl_sched_tunable_scaling, |
706 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
707 | SEQ_printf(m, "\n"); |
708 | } | |
1983a922 | 709 | |
bbbfeac9 NZ |
710 | static int sched_debug_show(struct seq_file *m, void *v) |
711 | { | |
712 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 713 | |
bbbfeac9 NZ |
714 | if (cpu != -1) |
715 | print_cpu(m, cpu); | |
716 | else | |
717 | sched_debug_header(m); | |
43ae34cb IM |
718 | |
719 | return 0; | |
720 | } | |
721 | ||
029632fb | 722 | void sysrq_sched_debug_show(void) |
43ae34cb | 723 | { |
bbbfeac9 NZ |
724 | int cpu; |
725 | ||
726 | sched_debug_header(NULL); | |
727 | for_each_online_cpu(cpu) | |
728 | print_cpu(NULL, cpu); | |
729 | ||
730 | } | |
731 | ||
732 | /* | |
733 | * This itererator needs some explanation. | |
734 | * It returns 1 for the header position. | |
735 | * This means 2 is cpu 0. | |
736 | * In a hotplugged system some cpus, including cpu 0, may be missing so we have | |
737 | * to use cpumask_* to iterate over the cpus. | |
738 | */ | |
739 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
740 | { | |
741 | unsigned long n = *offset; | |
742 | ||
743 | if (n == 0) | |
744 | return (void *) 1; | |
745 | ||
746 | n--; | |
747 | ||
748 | if (n > 0) | |
749 | n = cpumask_next(n - 1, cpu_online_mask); | |
750 | else | |
751 | n = cpumask_first(cpu_online_mask); | |
752 | ||
753 | *offset = n + 1; | |
754 | ||
755 | if (n < nr_cpu_ids) | |
756 | return (void *)(unsigned long)(n + 2); | |
757 | return NULL; | |
758 | } | |
759 | ||
760 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
761 | { | |
762 | (*offset)++; | |
763 | return sched_debug_start(file, offset); | |
764 | } | |
765 | ||
766 | static void sched_debug_stop(struct seq_file *file, void *data) | |
767 | { | |
768 | } | |
769 | ||
770 | static const struct seq_operations sched_debug_sops = { | |
771 | .start = sched_debug_start, | |
772 | .next = sched_debug_next, | |
773 | .stop = sched_debug_stop, | |
774 | .show = sched_debug_show, | |
775 | }; | |
776 | ||
777 | static int sched_debug_release(struct inode *inode, struct file *file) | |
778 | { | |
779 | seq_release(inode, file); | |
780 | ||
781 | return 0; | |
43ae34cb IM |
782 | } |
783 | ||
784 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
785 | { | |
bbbfeac9 NZ |
786 | int ret = 0; |
787 | ||
788 | ret = seq_open(filp, &sched_debug_sops); | |
789 | ||
790 | return ret; | |
43ae34cb IM |
791 | } |
792 | ||
0dbee3a6 | 793 | static const struct file_operations sched_debug_fops = { |
43ae34cb IM |
794 | .open = sched_debug_open, |
795 | .read = seq_read, | |
796 | .llseek = seq_lseek, | |
bbbfeac9 | 797 | .release = sched_debug_release, |
43ae34cb IM |
798 | }; |
799 | ||
800 | static int __init init_sched_debug_procfs(void) | |
801 | { | |
802 | struct proc_dir_entry *pe; | |
803 | ||
a9cf4ddb | 804 | pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops); |
43ae34cb IM |
805 | if (!pe) |
806 | return -ENOMEM; | |
43ae34cb IM |
807 | return 0; |
808 | } | |
809 | ||
810 | __initcall(init_sched_debug_procfs); | |
811 | ||
b32e86b4 IM |
812 | #define __P(F) \ |
813 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) | |
814 | #define P(F) \ | |
815 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) | |
816 | #define __PN(F) \ | |
817 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
818 | #define PN(F) \ | |
819 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) | |
820 | ||
821 | ||
397f2378 SD |
822 | #ifdef CONFIG_NUMA_BALANCING |
823 | void print_numa_stats(struct seq_file *m, int node, unsigned long tsf, | |
824 | unsigned long tpf, unsigned long gsf, unsigned long gpf) | |
825 | { | |
826 | SEQ_printf(m, "numa_faults node=%d ", node); | |
827 | SEQ_printf(m, "task_private=%lu task_shared=%lu ", tsf, tpf); | |
828 | SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gsf, gpf); | |
829 | } | |
830 | #endif | |
831 | ||
832 | ||
b32e86b4 IM |
833 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) |
834 | { | |
835 | #ifdef CONFIG_NUMA_BALANCING | |
836 | struct mempolicy *pol; | |
b32e86b4 IM |
837 | |
838 | if (p->mm) | |
839 | P(mm->numa_scan_seq); | |
840 | ||
841 | task_lock(p); | |
842 | pol = p->mempolicy; | |
843 | if (pol && !(pol->flags & MPOL_F_MORON)) | |
844 | pol = NULL; | |
845 | mpol_get(pol); | |
846 | task_unlock(p); | |
847 | ||
397f2378 SD |
848 | P(numa_pages_migrated); |
849 | P(numa_preferred_nid); | |
850 | P(total_numa_faults); | |
851 | SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", | |
852 | task_node(p), task_numa_group_id(p)); | |
853 | show_numa_stats(p, m); | |
b32e86b4 IM |
854 | mpol_put(pol); |
855 | #endif | |
856 | } | |
857 | ||
43ae34cb IM |
858 | void proc_sched_show_task(struct task_struct *p, struct seq_file *m) |
859 | { | |
cc367732 | 860 | unsigned long nr_switches; |
43ae34cb | 861 | |
fc840914 | 862 | SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p), |
5089a976 | 863 | get_nr_threads(p)); |
2d92f227 | 864 | SEQ_printf(m, |
add332a1 KB |
865 | "---------------------------------------------------------" |
866 | "----------\n"); | |
cc367732 | 867 | #define __P(F) \ |
add332a1 | 868 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) |
43ae34cb | 869 | #define P(F) \ |
add332a1 | 870 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) |
cc367732 | 871 | #define __PN(F) \ |
add332a1 | 872 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) |
ef83a571 | 873 | #define PN(F) \ |
add332a1 | 874 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) |
43ae34cb | 875 | |
ef83a571 IM |
876 | PN(se.exec_start); |
877 | PN(se.vruntime); | |
878 | PN(se.sum_exec_runtime); | |
6cfb0d5d | 879 | |
cc367732 IM |
880 | nr_switches = p->nvcsw + p->nivcsw; |
881 | ||
cc367732 | 882 | P(se.nr_migrations); |
cc367732 | 883 | |
03c041c5 | 884 | #ifdef CONFIG_SCHEDSTATS |
cb251765 | 885 | if (schedstat_enabled()) { |
cc367732 IM |
886 | u64 avg_atom, avg_per_cpu; |
887 | ||
cb251765 MG |
888 | PN(se.statistics.sum_sleep_runtime); |
889 | PN(se.statistics.wait_start); | |
890 | PN(se.statistics.sleep_start); | |
891 | PN(se.statistics.block_start); | |
892 | PN(se.statistics.sleep_max); | |
893 | PN(se.statistics.block_max); | |
894 | PN(se.statistics.exec_max); | |
895 | PN(se.statistics.slice_max); | |
896 | PN(se.statistics.wait_max); | |
897 | PN(se.statistics.wait_sum); | |
898 | P(se.statistics.wait_count); | |
899 | PN(se.statistics.iowait_sum); | |
900 | P(se.statistics.iowait_count); | |
901 | P(se.statistics.nr_migrations_cold); | |
902 | P(se.statistics.nr_failed_migrations_affine); | |
903 | P(se.statistics.nr_failed_migrations_running); | |
904 | P(se.statistics.nr_failed_migrations_hot); | |
905 | P(se.statistics.nr_forced_migrations); | |
906 | P(se.statistics.nr_wakeups); | |
907 | P(se.statistics.nr_wakeups_sync); | |
908 | P(se.statistics.nr_wakeups_migrate); | |
909 | P(se.statistics.nr_wakeups_local); | |
910 | P(se.statistics.nr_wakeups_remote); | |
911 | P(se.statistics.nr_wakeups_affine); | |
912 | P(se.statistics.nr_wakeups_affine_attempts); | |
913 | P(se.statistics.nr_wakeups_passive); | |
914 | P(se.statistics.nr_wakeups_idle); | |
915 | ||
cc367732 IM |
916 | avg_atom = p->se.sum_exec_runtime; |
917 | if (nr_switches) | |
b0ab99e7 | 918 | avg_atom = div64_ul(avg_atom, nr_switches); |
cc367732 IM |
919 | else |
920 | avg_atom = -1LL; | |
921 | ||
922 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 923 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
924 | avg_per_cpu = div64_u64(avg_per_cpu, |
925 | p->se.nr_migrations); | |
c1a89740 | 926 | } else { |
cc367732 | 927 | avg_per_cpu = -1LL; |
c1a89740 | 928 | } |
cc367732 IM |
929 | |
930 | __PN(avg_atom); | |
931 | __PN(avg_per_cpu); | |
932 | } | |
6cfb0d5d | 933 | #endif |
cc367732 | 934 | __P(nr_switches); |
add332a1 | 935 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 | 936 | "nr_voluntary_switches", (long long)p->nvcsw); |
add332a1 | 937 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 IM |
938 | "nr_involuntary_switches", (long long)p->nivcsw); |
939 | ||
43ae34cb | 940 | P(se.load.weight); |
333bb864 | 941 | #ifdef CONFIG_SMP |
9d89c257 YD |
942 | P(se.avg.load_sum); |
943 | P(se.avg.util_sum); | |
944 | P(se.avg.load_avg); | |
945 | P(se.avg.util_avg); | |
946 | P(se.avg.last_update_time); | |
939fd731 | 947 | #endif |
43ae34cb IM |
948 | P(policy); |
949 | P(prio); | |
ef83a571 | 950 | #undef PN |
cc367732 IM |
951 | #undef __PN |
952 | #undef P | |
953 | #undef __P | |
43ae34cb IM |
954 | |
955 | { | |
29d7b90c | 956 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
957 | u64 t0, t1; |
958 | ||
29d7b90c IM |
959 | t0 = cpu_clock(this_cpu); |
960 | t1 = cpu_clock(this_cpu); | |
add332a1 | 961 | SEQ_printf(m, "%-45s:%21Ld\n", |
43ae34cb IM |
962 | "clock-delta", (long long)(t1-t0)); |
963 | } | |
b32e86b4 IM |
964 | |
965 | sched_show_numa(p, m); | |
43ae34cb IM |
966 | } |
967 | ||
968 | void proc_sched_set_task(struct task_struct *p) | |
969 | { | |
6cfb0d5d | 970 | #ifdef CONFIG_SCHEDSTATS |
41acab88 | 971 | memset(&p->se.statistics, 0, sizeof(p->se.statistics)); |
6cfb0d5d | 972 | #endif |
43ae34cb | 973 | } |