Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
43ae34cb | 2 | /* |
391e43da | 3 | * kernel/sched/debug.c |
43ae34cb | 4 | * |
325ea10c | 5 | * Print the CFS rbtree and other debugging details |
43ae34cb IM |
6 | * |
7 | * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar | |
43ae34cb | 8 | */ |
029632fb | 9 | |
43ae34cb IM |
10 | /* |
11 | * This allows printing both to /proc/sched_debug and | |
12 | * to the console | |
13 | */ | |
14 | #define SEQ_printf(m, x...) \ | |
15 | do { \ | |
16 | if (m) \ | |
17 | seq_printf(m, x); \ | |
18 | else \ | |
a8c024cd | 19 | pr_cont(x); \ |
43ae34cb IM |
20 | } while (0) |
21 | ||
ef83a571 IM |
22 | /* |
23 | * Ease the printing of nsec fields: | |
24 | */ | |
90b2628f | 25 | static long long nsec_high(unsigned long long nsec) |
ef83a571 | 26 | { |
90b2628f | 27 | if ((long long)nsec < 0) { |
ef83a571 IM |
28 | nsec = -nsec; |
29 | do_div(nsec, 1000000); | |
30 | return -nsec; | |
31 | } | |
32 | do_div(nsec, 1000000); | |
33 | ||
34 | return nsec; | |
35 | } | |
36 | ||
90b2628f | 37 | static unsigned long nsec_low(unsigned long long nsec) |
ef83a571 | 38 | { |
90b2628f | 39 | if ((long long)nsec < 0) |
ef83a571 IM |
40 | nsec = -nsec; |
41 | ||
42 | return do_div(nsec, 1000000); | |
43 | } | |
44 | ||
45 | #define SPLIT_NS(x) nsec_high(x), nsec_low(x) | |
46 | ||
d6ca41d7 SRRH |
47 | #define SCHED_FEAT(name, enabled) \ |
48 | #name , | |
49 | ||
50 | static const char * const sched_feat_names[] = { | |
51 | #include "features.h" | |
52 | }; | |
53 | ||
54 | #undef SCHED_FEAT | |
55 | ||
56 | static int sched_feat_show(struct seq_file *m, void *v) | |
57 | { | |
58 | int i; | |
59 | ||
60 | for (i = 0; i < __SCHED_FEAT_NR; i++) { | |
61 | if (!(sysctl_sched_features & (1UL << i))) | |
62 | seq_puts(m, "NO_"); | |
63 | seq_printf(m, "%s ", sched_feat_names[i]); | |
64 | } | |
65 | seq_puts(m, "\n"); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
e9666d10 | 70 | #ifdef CONFIG_JUMP_LABEL |
d6ca41d7 SRRH |
71 | |
72 | #define jump_label_key__true STATIC_KEY_INIT_TRUE | |
73 | #define jump_label_key__false STATIC_KEY_INIT_FALSE | |
74 | ||
75 | #define SCHED_FEAT(name, enabled) \ | |
76 | jump_label_key__##enabled , | |
77 | ||
78 | struct static_key sched_feat_keys[__SCHED_FEAT_NR] = { | |
79 | #include "features.h" | |
80 | }; | |
81 | ||
82 | #undef SCHED_FEAT | |
83 | ||
84 | static void sched_feat_disable(int i) | |
85 | { | |
e73e8197 | 86 | static_key_disable_cpuslocked(&sched_feat_keys[i]); |
d6ca41d7 SRRH |
87 | } |
88 | ||
89 | static void sched_feat_enable(int i) | |
90 | { | |
e73e8197 | 91 | static_key_enable_cpuslocked(&sched_feat_keys[i]); |
d6ca41d7 SRRH |
92 | } |
93 | #else | |
94 | static void sched_feat_disable(int i) { }; | |
95 | static void sched_feat_enable(int i) { }; | |
e9666d10 | 96 | #endif /* CONFIG_JUMP_LABEL */ |
d6ca41d7 SRRH |
97 | |
98 | static int sched_feat_set(char *cmp) | |
99 | { | |
100 | int i; | |
101 | int neg = 0; | |
102 | ||
103 | if (strncmp(cmp, "NO_", 3) == 0) { | |
104 | neg = 1; | |
105 | cmp += 3; | |
106 | } | |
107 | ||
8f894bf4 YX |
108 | i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp); |
109 | if (i < 0) | |
110 | return i; | |
111 | ||
112 | if (neg) { | |
113 | sysctl_sched_features &= ~(1UL << i); | |
114 | sched_feat_disable(i); | |
115 | } else { | |
116 | sysctl_sched_features |= (1UL << i); | |
117 | sched_feat_enable(i); | |
d6ca41d7 SRRH |
118 | } |
119 | ||
8f894bf4 | 120 | return 0; |
d6ca41d7 SRRH |
121 | } |
122 | ||
123 | static ssize_t | |
124 | sched_feat_write(struct file *filp, const char __user *ubuf, | |
125 | size_t cnt, loff_t *ppos) | |
126 | { | |
127 | char buf[64]; | |
128 | char *cmp; | |
8f894bf4 | 129 | int ret; |
d6ca41d7 SRRH |
130 | struct inode *inode; |
131 | ||
132 | if (cnt > 63) | |
133 | cnt = 63; | |
134 | ||
135 | if (copy_from_user(&buf, ubuf, cnt)) | |
136 | return -EFAULT; | |
137 | ||
138 | buf[cnt] = 0; | |
139 | cmp = strstrip(buf); | |
140 | ||
141 | /* Ensure the static_key remains in a consistent state */ | |
142 | inode = file_inode(filp); | |
e73e8197 | 143 | cpus_read_lock(); |
d6ca41d7 | 144 | inode_lock(inode); |
8f894bf4 | 145 | ret = sched_feat_set(cmp); |
d6ca41d7 | 146 | inode_unlock(inode); |
e73e8197 | 147 | cpus_read_unlock(); |
8f894bf4 YX |
148 | if (ret < 0) |
149 | return ret; | |
d6ca41d7 SRRH |
150 | |
151 | *ppos += cnt; | |
152 | ||
153 | return cnt; | |
154 | } | |
155 | ||
156 | static int sched_feat_open(struct inode *inode, struct file *filp) | |
157 | { | |
158 | return single_open(filp, sched_feat_show, NULL); | |
159 | } | |
160 | ||
161 | static const struct file_operations sched_feat_fops = { | |
162 | .open = sched_feat_open, | |
163 | .write = sched_feat_write, | |
164 | .read = seq_read, | |
165 | .llseek = seq_lseek, | |
166 | .release = single_release, | |
167 | }; | |
168 | ||
8a99b683 PZ |
169 | #ifdef CONFIG_SMP |
170 | ||
171 | static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf, | |
172 | size_t cnt, loff_t *ppos) | |
173 | { | |
174 | char buf[16]; | |
70306618 | 175 | unsigned int scaling; |
8a99b683 PZ |
176 | |
177 | if (cnt > 15) | |
178 | cnt = 15; | |
179 | ||
180 | if (copy_from_user(&buf, ubuf, cnt)) | |
181 | return -EFAULT; | |
70306618 | 182 | buf[cnt] = '\0'; |
8a99b683 | 183 | |
70306618 | 184 | if (kstrtouint(buf, 10, &scaling)) |
8a99b683 PZ |
185 | return -EINVAL; |
186 | ||
70306618 MG |
187 | if (scaling >= SCHED_TUNABLESCALING_END) |
188 | return -EINVAL; | |
189 | ||
190 | sysctl_sched_tunable_scaling = scaling; | |
8a99b683 PZ |
191 | if (sched_update_scaling()) |
192 | return -EINVAL; | |
193 | ||
194 | *ppos += cnt; | |
195 | return cnt; | |
196 | } | |
197 | ||
198 | static int sched_scaling_show(struct seq_file *m, void *v) | |
199 | { | |
200 | seq_printf(m, "%d\n", sysctl_sched_tunable_scaling); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int sched_scaling_open(struct inode *inode, struct file *filp) | |
205 | { | |
206 | return single_open(filp, sched_scaling_show, NULL); | |
207 | } | |
208 | ||
209 | static const struct file_operations sched_scaling_fops = { | |
210 | .open = sched_scaling_open, | |
211 | .write = sched_scaling_write, | |
212 | .read = seq_read, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
215 | }; | |
216 | ||
217 | #endif /* SMP */ | |
218 | ||
1011dcce PZ |
219 | #ifdef CONFIG_PREEMPT_DYNAMIC |
220 | ||
221 | static ssize_t sched_dynamic_write(struct file *filp, const char __user *ubuf, | |
222 | size_t cnt, loff_t *ppos) | |
223 | { | |
224 | char buf[16]; | |
225 | int mode; | |
226 | ||
227 | if (cnt > 15) | |
228 | cnt = 15; | |
229 | ||
230 | if (copy_from_user(&buf, ubuf, cnt)) | |
231 | return -EFAULT; | |
232 | ||
233 | buf[cnt] = 0; | |
234 | mode = sched_dynamic_mode(strstrip(buf)); | |
235 | if (mode < 0) | |
236 | return mode; | |
237 | ||
238 | sched_dynamic_update(mode); | |
239 | ||
240 | *ppos += cnt; | |
241 | ||
242 | return cnt; | |
243 | } | |
244 | ||
245 | static int sched_dynamic_show(struct seq_file *m, void *v) | |
246 | { | |
247 | static const char * preempt_modes[] = { | |
248 | "none", "voluntary", "full" | |
249 | }; | |
250 | int i; | |
251 | ||
252 | for (i = 0; i < ARRAY_SIZE(preempt_modes); i++) { | |
253 | if (preempt_dynamic_mode == i) | |
254 | seq_puts(m, "("); | |
255 | seq_puts(m, preempt_modes[i]); | |
256 | if (preempt_dynamic_mode == i) | |
257 | seq_puts(m, ")"); | |
258 | ||
259 | seq_puts(m, " "); | |
260 | } | |
261 | ||
262 | seq_puts(m, "\n"); | |
263 | return 0; | |
264 | } | |
265 | ||
266 | static int sched_dynamic_open(struct inode *inode, struct file *filp) | |
267 | { | |
268 | return single_open(filp, sched_dynamic_show, NULL); | |
269 | } | |
270 | ||
271 | static const struct file_operations sched_dynamic_fops = { | |
272 | .open = sched_dynamic_open, | |
273 | .write = sched_dynamic_write, | |
274 | .read = seq_read, | |
275 | .llseek = seq_lseek, | |
276 | .release = single_release, | |
277 | }; | |
278 | ||
279 | #endif /* CONFIG_PREEMPT_DYNAMIC */ | |
280 | ||
9406415f | 281 | __read_mostly bool sched_debug_verbose; |
9469eb01 | 282 | |
34320745 PA |
283 | #ifdef CONFIG_SMP |
284 | static struct dentry *sd_dentry; | |
285 | ||
286 | ||
287 | static ssize_t sched_verbose_write(struct file *filp, const char __user *ubuf, | |
288 | size_t cnt, loff_t *ppos) | |
289 | { | |
290 | ssize_t result; | |
291 | bool orig; | |
292 | ||
293 | cpus_read_lock(); | |
294 | mutex_lock(&sched_domains_mutex); | |
295 | ||
296 | orig = sched_debug_verbose; | |
297 | result = debugfs_write_file_bool(filp, ubuf, cnt, ppos); | |
298 | ||
299 | if (sched_debug_verbose && !orig) | |
300 | update_sched_domain_debugfs(); | |
301 | else if (!sched_debug_verbose && orig) { | |
302 | debugfs_remove(sd_dentry); | |
303 | sd_dentry = NULL; | |
304 | } | |
305 | ||
306 | mutex_unlock(&sched_domains_mutex); | |
307 | cpus_read_unlock(); | |
308 | ||
309 | return result; | |
310 | } | |
311 | #else | |
312 | #define sched_verbose_write debugfs_write_file_bool | |
313 | #endif | |
314 | ||
315 | static const struct file_operations sched_verbose_fops = { | |
316 | .read = debugfs_read_file_bool, | |
317 | .write = sched_verbose_write, | |
318 | .open = simple_open, | |
319 | .llseek = default_llseek, | |
320 | }; | |
321 | ||
d27e9ae2 PZ |
322 | static const struct seq_operations sched_debug_sops; |
323 | ||
324 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
325 | { | |
326 | return seq_open(filp, &sched_debug_sops); | |
327 | } | |
328 | ||
329 | static const struct file_operations sched_debug_fops = { | |
330 | .open = sched_debug_open, | |
331 | .read = seq_read, | |
332 | .llseek = seq_lseek, | |
333 | .release = seq_release, | |
334 | }; | |
335 | ||
1011dcce | 336 | static struct dentry *debugfs_sched; |
8a99b683 | 337 | |
d6ca41d7 SRRH |
338 | static __init int sched_init_debug(void) |
339 | { | |
8a99b683 | 340 | struct dentry __maybe_unused *numa; |
d6ca41d7 | 341 | |
8a99b683 PZ |
342 | debugfs_sched = debugfs_create_dir("sched", NULL); |
343 | ||
344 | debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops); | |
34320745 | 345 | debugfs_create_file_unsafe("verbose", 0644, debugfs_sched, &sched_debug_verbose, &sched_verbose_fops); |
1011dcce PZ |
346 | #ifdef CONFIG_PREEMPT_DYNAMIC |
347 | debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops); | |
348 | #endif | |
8a99b683 | 349 | |
e4ec3318 | 350 | debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice); |
8a99b683 | 351 | |
c006fac5 PT |
352 | debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms); |
353 | debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once); | |
354 | ||
8a99b683 PZ |
355 | #ifdef CONFIG_SMP |
356 | debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops); | |
357 | debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost); | |
358 | debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate); | |
3b87f136 PZ |
359 | |
360 | mutex_lock(&sched_domains_mutex); | |
361 | update_sched_domain_debugfs(); | |
362 | mutex_unlock(&sched_domains_mutex); | |
8a99b683 PZ |
363 | #endif |
364 | ||
365 | #ifdef CONFIG_NUMA_BALANCING | |
366 | numa = debugfs_create_dir("numa_balancing", debugfs_sched); | |
367 | ||
368 | debugfs_create_u32("scan_delay_ms", 0644, numa, &sysctl_numa_balancing_scan_delay); | |
369 | debugfs_create_u32("scan_period_min_ms", 0644, numa, &sysctl_numa_balancing_scan_period_min); | |
370 | debugfs_create_u32("scan_period_max_ms", 0644, numa, &sysctl_numa_balancing_scan_period_max); | |
371 | debugfs_create_u32("scan_size_mb", 0644, numa, &sysctl_numa_balancing_scan_size); | |
33024536 | 372 | debugfs_create_u32("hot_threshold_ms", 0644, numa, &sysctl_numa_balancing_hot_threshold); |
8a99b683 | 373 | #endif |
9469eb01 | 374 | |
d27e9ae2 PZ |
375 | debugfs_create_file("debug", 0444, debugfs_sched, NULL, &sched_debug_fops); |
376 | ||
d6ca41d7 SRRH |
377 | return 0; |
378 | } | |
379 | late_initcall(sched_init_debug); | |
380 | ||
3866e845 SRRH |
381 | #ifdef CONFIG_SMP |
382 | ||
3b87f136 | 383 | static cpumask_var_t sd_sysctl_cpus; |
3866e845 | 384 | |
3b87f136 | 385 | static int sd_flags_show(struct seq_file *m, void *v) |
5b9f8ff7 | 386 | { |
3b87f136 | 387 | unsigned long flags = *(unsigned int *)m->private; |
5b9f8ff7 VS |
388 | int idx; |
389 | ||
5b9f8ff7 | 390 | for_each_set_bit(idx, &flags, __SD_FLAG_CNT) { |
3b87f136 PZ |
391 | seq_puts(m, sd_flag_debug[idx].name); |
392 | seq_puts(m, " "); | |
5b9f8ff7 | 393 | } |
3b87f136 | 394 | seq_puts(m, "\n"); |
5b9f8ff7 VS |
395 | |
396 | return 0; | |
397 | } | |
398 | ||
3b87f136 | 399 | static int sd_flags_open(struct inode *inode, struct file *file) |
3866e845 | 400 | { |
3b87f136 | 401 | return single_open(file, sd_flags_show, inode->i_private); |
3866e845 SRRH |
402 | } |
403 | ||
3b87f136 PZ |
404 | static const struct file_operations sd_flags_fops = { |
405 | .open = sd_flags_open, | |
406 | .read = seq_read, | |
407 | .llseek = seq_lseek, | |
408 | .release = single_release, | |
409 | }; | |
bbdacdfe | 410 | |
3b87f136 | 411 | static void register_sd(struct sched_domain *sd, struct dentry *parent) |
3866e845 | 412 | { |
3b87f136 PZ |
413 | #define SDM(type, mode, member) \ |
414 | debugfs_create_##type(#member, mode, parent, &sd->member) | |
3866e845 | 415 | |
3b87f136 PZ |
416 | SDM(ulong, 0644, min_interval); |
417 | SDM(ulong, 0644, max_interval); | |
418 | SDM(u64, 0644, max_newidle_lb_cost); | |
419 | SDM(u32, 0644, busy_factor); | |
420 | SDM(u32, 0644, imbalance_pct); | |
421 | SDM(u32, 0644, cache_nice_tries); | |
422 | SDM(str, 0444, name); | |
3866e845 | 423 | |
3b87f136 | 424 | #undef SDM |
bbdacdfe | 425 | |
3b87f136 | 426 | debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops); |
ed74cc49 | 427 | debugfs_create_file("groups_flags", 0444, parent, &sd->groups->flags, &sd_flags_fops); |
3b87f136 | 428 | } |
bbdacdfe | 429 | |
3b87f136 PZ |
430 | void update_sched_domain_debugfs(void) |
431 | { | |
432 | int cpu, i; | |
bbdacdfe | 433 | |
459b09b5 VS |
434 | /* |
435 | * This can unfortunately be invoked before sched_debug_init() creates | |
436 | * the debug directory. Don't touch sd_sysctl_cpus until then. | |
437 | */ | |
438 | if (!debugfs_sched) | |
439 | return; | |
440 | ||
34320745 PA |
441 | if (!sched_debug_verbose) |
442 | return; | |
443 | ||
bbdacdfe PZ |
444 | if (!cpumask_available(sd_sysctl_cpus)) { |
445 | if (!alloc_cpumask_var(&sd_sysctl_cpus, GFP_KERNEL)) | |
446 | return; | |
bbdacdfe PZ |
447 | cpumask_copy(sd_sysctl_cpus, cpu_possible_mask); |
448 | } | |
449 | ||
34320745 | 450 | if (!sd_dentry) { |
3b87f136 PZ |
451 | sd_dentry = debugfs_create_dir("domains", debugfs_sched); |
452 | ||
34320745 PA |
453 | /* rebuild sd_sysctl_cpus if empty since it gets cleared below */ |
454 | if (cpumask_empty(sd_sysctl_cpus)) | |
455 | cpumask_copy(sd_sysctl_cpus, cpu_online_mask); | |
456 | } | |
457 | ||
3b87f136 PZ |
458 | for_each_cpu(cpu, sd_sysctl_cpus) { |
459 | struct sched_domain *sd; | |
460 | struct dentry *d_cpu; | |
461 | char buf[32]; | |
462 | ||
463 | snprintf(buf, sizeof(buf), "cpu%d", cpu); | |
c2e40659 | 464 | debugfs_lookup_and_remove(buf, sd_dentry); |
3b87f136 PZ |
465 | d_cpu = debugfs_create_dir(buf, sd_dentry); |
466 | ||
467 | i = 0; | |
468 | for_each_domain(cpu, sd) { | |
469 | struct dentry *d_sd; | |
bbdacdfe | 470 | |
3b87f136 PZ |
471 | snprintf(buf, sizeof(buf), "domain%d", i); |
472 | d_sd = debugfs_create_dir(buf, d_cpu); | |
bbdacdfe | 473 | |
3b87f136 PZ |
474 | register_sd(sd, d_sd); |
475 | i++; | |
bbdacdfe | 476 | } |
bbdacdfe | 477 | |
3b87f136 | 478 | __cpumask_clear_cpu(cpu, sd_sysctl_cpus); |
3866e845 | 479 | } |
3866e845 SRRH |
480 | } |
481 | ||
bbdacdfe PZ |
482 | void dirty_sched_domain_sysctl(int cpu) |
483 | { | |
484 | if (cpumask_available(sd_sysctl_cpus)) | |
485 | __cpumask_set_cpu(cpu, sd_sysctl_cpus); | |
486 | } | |
487 | ||
3866e845 SRRH |
488 | #endif /* CONFIG_SMP */ |
489 | ||
ff9b48c3 | 490 | #ifdef CONFIG_FAIR_GROUP_SCHED |
5091faa4 | 491 | static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg) |
ff9b48c3 BR |
492 | { |
493 | struct sched_entity *se = tg->se[cpu]; | |
ff9b48c3 | 494 | |
97fb7a0a | 495 | #define P(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F) |
ceeadb83 YS |
496 | #define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", \ |
497 | #F, (long long)schedstat_val(stats->F)) | |
97fb7a0a | 498 | #define PN(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) |
ceeadb83 YS |
499 | #define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", \ |
500 | #F, SPLIT_NS((long long)schedstat_val(stats->F))) | |
ff9b48c3 | 501 | |
cd126afe | 502 | if (!se) |
18bf2805 | 503 | return; |
18bf2805 | 504 | |
ff9b48c3 BR |
505 | PN(se->exec_start); |
506 | PN(se->vruntime); | |
507 | PN(se->sum_exec_runtime); | |
97fb7a0a | 508 | |
cb251765 | 509 | if (schedstat_enabled()) { |
769fdf83 PZ |
510 | struct sched_statistics *stats; |
511 | stats = __schedstats_from_se(se); | |
ceeadb83 YS |
512 | |
513 | PN_SCHEDSTAT(wait_start); | |
514 | PN_SCHEDSTAT(sleep_start); | |
515 | PN_SCHEDSTAT(block_start); | |
516 | PN_SCHEDSTAT(sleep_max); | |
517 | PN_SCHEDSTAT(block_max); | |
518 | PN_SCHEDSTAT(exec_max); | |
519 | PN_SCHEDSTAT(slice_max); | |
520 | PN_SCHEDSTAT(wait_max); | |
521 | PN_SCHEDSTAT(wait_sum); | |
522 | P_SCHEDSTAT(wait_count); | |
cb251765 | 523 | } |
97fb7a0a | 524 | |
ff9b48c3 | 525 | P(se->load.weight); |
9d85f21c | 526 | #ifdef CONFIG_SMP |
9d89c257 YD |
527 | P(se->avg.load_avg); |
528 | P(se->avg.util_avg); | |
9f683953 | 529 | P(se->avg.runnable_avg); |
9d85f21c | 530 | #endif |
4fa8d299 JP |
531 | |
532 | #undef PN_SCHEDSTAT | |
ff9b48c3 | 533 | #undef PN |
4fa8d299 | 534 | #undef P_SCHEDSTAT |
ff9b48c3 BR |
535 | #undef P |
536 | } | |
537 | #endif | |
538 | ||
efe25c2c | 539 | #ifdef CONFIG_CGROUP_SCHED |
ad789f84 | 540 | static DEFINE_SPINLOCK(sched_debug_lock); |
efe25c2c BR |
541 | static char group_path[PATH_MAX]; |
542 | ||
ad789f84 | 543 | static void task_group_path(struct task_group *tg, char *path, int plen) |
efe25c2c | 544 | { |
ad789f84 WL |
545 | if (autogroup_path(tg, path, plen)) |
546 | return; | |
8ecedd7a | 547 | |
ad789f84 WL |
548 | cgroup_path(tg->css.cgroup, path, plen); |
549 | } | |
97fb7a0a | 550 | |
ad789f84 WL |
551 | /* |
552 | * Only 1 SEQ_printf_task_group_path() caller can use the full length | |
553 | * group_path[] for cgroup path. Other simultaneous callers will have | |
554 | * to use a shorter stack buffer. A "..." suffix is appended at the end | |
555 | * of the stack buffer so that it will show up in case the output length | |
556 | * matches the given buffer size to indicate possible path name truncation. | |
557 | */ | |
558 | #define SEQ_printf_task_group_path(m, tg, fmt...) \ | |
559 | { \ | |
560 | if (spin_trylock(&sched_debug_lock)) { \ | |
561 | task_group_path(tg, group_path, sizeof(group_path)); \ | |
562 | SEQ_printf(m, fmt, group_path); \ | |
563 | spin_unlock(&sched_debug_lock); \ | |
564 | } else { \ | |
565 | char buf[128]; \ | |
566 | char *bufend = buf + sizeof(buf) - 3; \ | |
567 | task_group_path(tg, buf, bufend - buf); \ | |
568 | strcpy(bufend - 1, "..."); \ | |
569 | SEQ_printf(m, fmt, buf); \ | |
570 | } \ | |
efe25c2c BR |
571 | } |
572 | #endif | |
573 | ||
43ae34cb | 574 | static void |
a48da48b | 575 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) |
43ae34cb | 576 | { |
65bcf072 | 577 | if (task_current(rq, p)) |
e8c16495 | 578 | SEQ_printf(m, ">R"); |
20435d84 XX |
579 | else |
580 | SEQ_printf(m, " %c", task_state_to_char(p)); | |
43ae34cb | 581 | |
147f3efa | 582 | SEQ_printf(m, "%15s %5d %9Ld.%06ld %c %9Ld.%06ld %9Ld.%06ld %9Ld.%06ld %9Ld %5d ", |
fc840914 | 583 | p->comm, task_pid_nr(p), |
ef83a571 | 584 | SPLIT_NS(p->se.vruntime), |
147f3efa PZ |
585 | entity_eligible(cfs_rq_of(&p->se), &p->se) ? 'E' : 'N', |
586 | SPLIT_NS(p->se.deadline), | |
587 | SPLIT_NS(p->se.slice), | |
588 | SPLIT_NS(p->se.sum_exec_runtime), | |
43ae34cb | 589 | (long long)(p->nvcsw + p->nivcsw), |
6f605d83 | 590 | p->prio); |
9c572591 | 591 | |
847fc0cd | 592 | SEQ_printf(m, "%9lld.%06ld %9lld.%06ld %9lld.%06ld %9lld.%06ld", |
ceeadb83 | 593 | SPLIT_NS(schedstat_val_or_zero(p->stats.wait_sum)), |
33d6176e | 594 | SPLIT_NS(p->se.sum_exec_runtime), |
847fc0cd YS |
595 | SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)), |
596 | SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime))); | |
9c572591 | 597 | |
b32e86b4 | 598 | #ifdef CONFIG_NUMA_BALANCING |
e3d24d0a | 599 | SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); |
b32e86b4 | 600 | #endif |
efe25c2c | 601 | #ifdef CONFIG_CGROUP_SCHED |
ad789f84 | 602 | SEQ_printf_task_group_path(m, task_group(p), " %s") |
efe25c2c | 603 | #endif |
d19ca308 | 604 | |
d19ca308 | 605 | SEQ_printf(m, "\n"); |
43ae34cb IM |
606 | } |
607 | ||
a48da48b | 608 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) |
43ae34cb IM |
609 | { |
610 | struct task_struct *g, *p; | |
611 | ||
e9ca2670 JL |
612 | SEQ_printf(m, "\n"); |
613 | SEQ_printf(m, "runnable tasks:\n"); | |
f080d93e | 614 | SEQ_printf(m, " S task PID tree-key switches prio" |
e9ca2670 JL |
615 | " wait-time sum-exec sum-sleep\n"); |
616 | SEQ_printf(m, "-------------------------------------------------------" | |
f080d93e | 617 | "------------------------------------------------------\n"); |
43ae34cb | 618 | |
5bd96ab6 | 619 | rcu_read_lock(); |
d38e83c7 | 620 | for_each_process_thread(g, p) { |
b32e86b4 | 621 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
622 | continue; |
623 | ||
a48da48b | 624 | print_task(m, rq, p); |
d38e83c7 | 625 | } |
5bd96ab6 | 626 | rcu_read_unlock(); |
43ae34cb IM |
627 | } |
628 | ||
5cef9eca | 629 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 630 | { |
af4cf404 PZ |
631 | s64 left_vruntime = -1, min_vruntime, right_vruntime = -1, spread; |
632 | struct sched_entity *last, *first; | |
348ec61e | 633 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
634 | unsigned long flags; |
635 | ||
efe25c2c | 636 | #ifdef CONFIG_FAIR_GROUP_SCHED |
e9ca2670 | 637 | SEQ_printf(m, "\n"); |
ad789f84 | 638 | SEQ_printf_task_group_path(m, cfs_rq->tg, "cfs_rq[%d]:%s\n", cpu); |
efe25c2c | 639 | #else |
e9ca2670 JL |
640 | SEQ_printf(m, "\n"); |
641 | SEQ_printf(m, "cfs_rq[%d]:\n", cpu); | |
efe25c2c | 642 | #endif |
ef83a571 IM |
643 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
644 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 645 | |
5cb9eaa3 | 646 | raw_spin_rq_lock_irqsave(rq, flags); |
af4cf404 PZ |
647 | first = __pick_first_entity(cfs_rq); |
648 | if (first) | |
649 | left_vruntime = first->vruntime; | |
67e12eac IM |
650 | last = __pick_last_entity(cfs_rq); |
651 | if (last) | |
af4cf404 | 652 | right_vruntime = last->vruntime; |
5ac5c4d6 | 653 | min_vruntime = cfs_rq->min_vruntime; |
5cb9eaa3 | 654 | raw_spin_rq_unlock_irqrestore(rq, flags); |
af4cf404 PZ |
655 | |
656 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_vruntime", | |
657 | SPLIT_NS(left_vruntime)); | |
ef83a571 IM |
658 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", |
659 | SPLIT_NS(min_vruntime)); | |
af4cf404 PZ |
660 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "avg_vruntime", |
661 | SPLIT_NS(avg_vruntime(cfs_rq))); | |
662 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "right_vruntime", | |
663 | SPLIT_NS(right_vruntime)); | |
664 | spread = right_vruntime - left_vruntime; | |
665 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", SPLIT_NS(spread)); | |
5ac5c4d6 | 666 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 667 | cfs_rq->nr_spread_over); |
c82513e5 | 668 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
30400039 | 669 | SEQ_printf(m, " .%-30s: %d\n", "h_nr_running", cfs_rq->h_nr_running); |
a480adde JD |
670 | SEQ_printf(m, " .%-30s: %d\n", "idle_nr_running", |
671 | cfs_rq->idle_nr_running); | |
30400039 JD |
672 | SEQ_printf(m, " .%-30s: %d\n", "idle_h_nr_running", |
673 | cfs_rq->idle_h_nr_running); | |
2069dd75 | 674 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 675 | #ifdef CONFIG_SMP |
9d89c257 YD |
676 | SEQ_printf(m, " .%-30s: %lu\n", "load_avg", |
677 | cfs_rq->avg.load_avg); | |
9f683953 VG |
678 | SEQ_printf(m, " .%-30s: %lu\n", "runnable_avg", |
679 | cfs_rq->avg.runnable_avg); | |
9d89c257 YD |
680 | SEQ_printf(m, " .%-30s: %lu\n", "util_avg", |
681 | cfs_rq->avg.util_avg); | |
7f65ea42 PB |
682 | SEQ_printf(m, " .%-30s: %u\n", "util_est_enqueued", |
683 | cfs_rq->avg.util_est.enqueued); | |
2a2f5d4e PZ |
684 | SEQ_printf(m, " .%-30s: %ld\n", "removed.load_avg", |
685 | cfs_rq->removed.load_avg); | |
686 | SEQ_printf(m, " .%-30s: %ld\n", "removed.util_avg", | |
687 | cfs_rq->removed.util_avg); | |
9f683953 VG |
688 | SEQ_printf(m, " .%-30s: %ld\n", "removed.runnable_avg", |
689 | cfs_rq->removed.runnable_avg); | |
333bb864 | 690 | #ifdef CONFIG_FAIR_GROUP_SCHED |
9d89c257 YD |
691 | SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib", |
692 | cfs_rq->tg_load_avg_contrib); | |
333bb864 AS |
693 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
694 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
c09595f6 | 695 | #endif |
333bb864 | 696 | #endif |
f9f9ffc2 | 697 | #ifdef CONFIG_CFS_BANDWIDTH |
f9f9ffc2 BS |
698 | SEQ_printf(m, " .%-30s: %d\n", "throttled", |
699 | cfs_rq->throttled); | |
700 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
701 | cfs_rq->throttle_count); | |
702 | #endif | |
2069dd75 | 703 | |
333bb864 | 704 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 705 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 706 | #endif |
43ae34cb IM |
707 | } |
708 | ||
ada18de2 PZ |
709 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
710 | { | |
efe25c2c | 711 | #ifdef CONFIG_RT_GROUP_SCHED |
e9ca2670 | 712 | SEQ_printf(m, "\n"); |
ad789f84 | 713 | SEQ_printf_task_group_path(m, rt_rq->tg, "rt_rq[%d]:%s\n", cpu); |
efe25c2c | 714 | #else |
e9ca2670 JL |
715 | SEQ_printf(m, "\n"); |
716 | SEQ_printf(m, "rt_rq[%d]:\n", cpu); | |
efe25c2c | 717 | #endif |
ada18de2 PZ |
718 | |
719 | #define P(x) \ | |
720 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
48365b38 DBO |
721 | #define PU(x) \ |
722 | SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(rt_rq->x)) | |
ada18de2 PZ |
723 | #define PN(x) \ |
724 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
725 | ||
48365b38 DBO |
726 | PU(rt_nr_running); |
727 | #ifdef CONFIG_SMP | |
728 | PU(rt_nr_migratory); | |
729 | #endif | |
ada18de2 PZ |
730 | P(rt_throttled); |
731 | PN(rt_time); | |
732 | PN(rt_runtime); | |
733 | ||
734 | #undef PN | |
48365b38 | 735 | #undef PU |
ada18de2 PZ |
736 | #undef P |
737 | } | |
738 | ||
acb32132 WL |
739 | void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq) |
740 | { | |
ef477183 SRRH |
741 | struct dl_bw *dl_bw; |
742 | ||
e9ca2670 JL |
743 | SEQ_printf(m, "\n"); |
744 | SEQ_printf(m, "dl_rq[%d]:\n", cpu); | |
48365b38 DBO |
745 | |
746 | #define PU(x) \ | |
747 | SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x)) | |
748 | ||
749 | PU(dl_nr_running); | |
ef477183 | 750 | #ifdef CONFIG_SMP |
48365b38 | 751 | PU(dl_nr_migratory); |
ef477183 SRRH |
752 | dl_bw = &cpu_rq(cpu)->rd->dl_bw; |
753 | #else | |
754 | dl_bw = &dl_rq->dl_bw; | |
755 | #endif | |
756 | SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw); | |
757 | SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw); | |
48365b38 DBO |
758 | |
759 | #undef PU | |
acb32132 WL |
760 | } |
761 | ||
a48da48b | 762 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 763 | { |
348ec61e | 764 | struct rq *rq = cpu_rq(cpu); |
43ae34cb IM |
765 | |
766 | #ifdef CONFIG_X86 | |
767 | { | |
768 | unsigned int freq = cpu_khz ? : 1; | |
769 | ||
bbbfeac9 | 770 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
771 | cpu, freq / 1000, (freq % 1000)); |
772 | } | |
773 | #else | |
bbbfeac9 | 774 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
775 | #endif |
776 | ||
13e099d2 PZ |
777 | #define P(x) \ |
778 | do { \ | |
779 | if (sizeof(rq->x) == 4) \ | |
a6fcdd8d | 780 | SEQ_printf(m, " .%-30s: %d\n", #x, (int)(rq->x)); \ |
13e099d2 PZ |
781 | else \ |
782 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
783 | } while (0) | |
784 | ||
ef83a571 IM |
785 | #define PN(x) \ |
786 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
787 | |
788 | P(nr_running); | |
43ae34cb | 789 | P(nr_switches); |
43ae34cb | 790 | P(nr_uninterruptible); |
ef83a571 | 791 | PN(next_balance); |
fc840914 | 792 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 793 | PN(clock); |
5a537597 | 794 | PN(clock_task); |
43ae34cb | 795 | #undef P |
ef83a571 | 796 | #undef PN |
43ae34cb | 797 | |
1b9508f6 | 798 | #ifdef CONFIG_SMP |
db6ea2fb | 799 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
1b9508f6 | 800 | P64(avg_idle); |
37e6bae8 | 801 | P64(max_idle_balance_cost); |
db6ea2fb | 802 | #undef P64 |
1b9508f6 | 803 | #endif |
5ac5c4d6 | 804 | |
4fa8d299 | 805 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, schedstat_val(rq->n)); |
cb251765 MG |
806 | if (schedstat_enabled()) { |
807 | P(yld_count); | |
808 | P(sched_count); | |
809 | P(sched_goidle); | |
810 | P(ttwu_count); | |
811 | P(ttwu_local); | |
812 | } | |
5ac5c4d6 | 813 | #undef P |
4fa8d299 | 814 | |
5cef9eca | 815 | print_cfs_stats(m, cpu); |
ada18de2 | 816 | print_rt_stats(m, cpu); |
acb32132 | 817 | print_dl_stats(m, cpu); |
43ae34cb | 818 | |
a48da48b | 819 | print_rq(m, rq, cpu); |
bbbfeac9 | 820 | SEQ_printf(m, "\n"); |
43ae34cb IM |
821 | } |
822 | ||
1983a922 CE |
823 | static const char *sched_tunable_scaling_names[] = { |
824 | "none", | |
ad2e379d | 825 | "logarithmic", |
1983a922 CE |
826 | "linear" |
827 | }; | |
828 | ||
bbbfeac9 | 829 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 830 | { |
5bb6b1ea PZ |
831 | u64 ktime, sched_clk, cpu_clk; |
832 | unsigned long flags; | |
43ae34cb | 833 | |
5bb6b1ea PZ |
834 | local_irq_save(flags); |
835 | ktime = ktime_to_ns(ktime_get()); | |
836 | sched_clk = sched_clock(); | |
837 | cpu_clk = local_clock(); | |
838 | local_irq_restore(flags); | |
839 | ||
b32e86b4 | 840 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
841 | init_utsname()->release, |
842 | (int)strcspn(init_utsname()->version, " "), | |
843 | init_utsname()->version); | |
844 | ||
5bb6b1ea PZ |
845 | #define P(x) \ |
846 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
847 | #define PN(x) \ | |
848 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
849 | PN(ktime); | |
850 | PN(sched_clk); | |
851 | PN(cpu_clk); | |
852 | P(jiffies); | |
853 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 854 | P(sched_clock_stable()); |
5bb6b1ea PZ |
855 | #endif |
856 | #undef PN | |
857 | #undef P | |
858 | ||
859 | SEQ_printf(m, "\n"); | |
860 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 861 | |
1aa4731e | 862 | #define P(x) \ |
d822cece | 863 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 864 | #define PN(x) \ |
d822cece | 865 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
e4ec3318 | 866 | PN(sysctl_sched_base_slice); |
eebef746 | 867 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
868 | P(sysctl_sched_features); |
869 | #undef PN | |
870 | #undef P | |
871 | ||
bbbfeac9 NZ |
872 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
873 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
874 | sysctl_sched_tunable_scaling, |
875 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
876 | SEQ_printf(m, "\n"); |
877 | } | |
1983a922 | 878 | |
bbbfeac9 NZ |
879 | static int sched_debug_show(struct seq_file *m, void *v) |
880 | { | |
881 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 882 | |
bbbfeac9 NZ |
883 | if (cpu != -1) |
884 | print_cpu(m, cpu); | |
885 | else | |
886 | sched_debug_header(m); | |
43ae34cb IM |
887 | |
888 | return 0; | |
889 | } | |
890 | ||
029632fb | 891 | void sysrq_sched_debug_show(void) |
43ae34cb | 892 | { |
bbbfeac9 NZ |
893 | int cpu; |
894 | ||
895 | sched_debug_header(NULL); | |
02d4ac58 WL |
896 | for_each_online_cpu(cpu) { |
897 | /* | |
898 | * Need to reset softlockup watchdogs on all CPUs, because | |
899 | * another CPU might be blocked waiting for us to process | |
900 | * an IPI or stop_machine. | |
901 | */ | |
902 | touch_nmi_watchdog(); | |
903 | touch_all_softlockup_watchdogs(); | |
bbbfeac9 | 904 | print_cpu(NULL, cpu); |
02d4ac58 | 905 | } |
bbbfeac9 NZ |
906 | } |
907 | ||
908 | /* | |
3b03706f | 909 | * This iterator needs some explanation. |
bbbfeac9 | 910 | * It returns 1 for the header position. |
97fb7a0a IM |
911 | * This means 2 is CPU 0. |
912 | * In a hotplugged system some CPUs, including CPU 0, may be missing so we have | |
913 | * to use cpumask_* to iterate over the CPUs. | |
bbbfeac9 NZ |
914 | */ |
915 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
916 | { | |
917 | unsigned long n = *offset; | |
918 | ||
919 | if (n == 0) | |
920 | return (void *) 1; | |
921 | ||
922 | n--; | |
923 | ||
924 | if (n > 0) | |
925 | n = cpumask_next(n - 1, cpu_online_mask); | |
926 | else | |
927 | n = cpumask_first(cpu_online_mask); | |
928 | ||
929 | *offset = n + 1; | |
930 | ||
931 | if (n < nr_cpu_ids) | |
932 | return (void *)(unsigned long)(n + 2); | |
97fb7a0a | 933 | |
bbbfeac9 NZ |
934 | return NULL; |
935 | } | |
936 | ||
937 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
938 | { | |
939 | (*offset)++; | |
940 | return sched_debug_start(file, offset); | |
941 | } | |
942 | ||
943 | static void sched_debug_stop(struct seq_file *file, void *data) | |
944 | { | |
945 | } | |
946 | ||
947 | static const struct seq_operations sched_debug_sops = { | |
97fb7a0a IM |
948 | .start = sched_debug_start, |
949 | .next = sched_debug_next, | |
950 | .stop = sched_debug_stop, | |
951 | .show = sched_debug_show, | |
bbbfeac9 NZ |
952 | }; |
953 | ||
9e3bf946 VS |
954 | #define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F)) |
955 | #define __P(F) __PS(#F, F) | |
956 | #define P(F) __PS(#F, p->F) | |
68d7a190 | 957 | #define PM(F, M) __PS(#F, p->F & (M)) |
9e3bf946 VS |
958 | #define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F))) |
959 | #define __PN(F) __PSN(#F, F) | |
960 | #define PN(F) __PSN(#F, p->F) | |
b32e86b4 IM |
961 | |
962 | ||
397f2378 SD |
963 | #ifdef CONFIG_NUMA_BALANCING |
964 | void print_numa_stats(struct seq_file *m, int node, unsigned long tsf, | |
965 | unsigned long tpf, unsigned long gsf, unsigned long gpf) | |
966 | { | |
967 | SEQ_printf(m, "numa_faults node=%d ", node); | |
67d9f6c2 SD |
968 | SEQ_printf(m, "task_private=%lu task_shared=%lu ", tpf, tsf); |
969 | SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gpf, gsf); | |
397f2378 SD |
970 | } |
971 | #endif | |
972 | ||
973 | ||
b32e86b4 IM |
974 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) |
975 | { | |
976 | #ifdef CONFIG_NUMA_BALANCING | |
b32e86b4 IM |
977 | if (p->mm) |
978 | P(mm->numa_scan_seq); | |
979 | ||
397f2378 SD |
980 | P(numa_pages_migrated); |
981 | P(numa_preferred_nid); | |
982 | P(total_numa_faults); | |
983 | SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", | |
984 | task_node(p), task_numa_group_id(p)); | |
985 | show_numa_stats(p, m); | |
b32e86b4 IM |
986 | #endif |
987 | } | |
988 | ||
74dc3384 AS |
989 | void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, |
990 | struct seq_file *m) | |
43ae34cb | 991 | { |
cc367732 | 992 | unsigned long nr_switches; |
43ae34cb | 993 | |
74dc3384 | 994 | SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr_ns(p, ns), |
5089a976 | 995 | get_nr_threads(p)); |
2d92f227 | 996 | SEQ_printf(m, |
add332a1 KB |
997 | "---------------------------------------------------------" |
998 | "----------\n"); | |
9e3bf946 | 999 | |
ceeadb83 YS |
1000 | #define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->stats.F)) |
1001 | #define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->stats.F)) | |
43ae34cb | 1002 | |
ef83a571 IM |
1003 | PN(se.exec_start); |
1004 | PN(se.vruntime); | |
1005 | PN(se.sum_exec_runtime); | |
6cfb0d5d | 1006 | |
cc367732 IM |
1007 | nr_switches = p->nvcsw + p->nivcsw; |
1008 | ||
cc367732 | 1009 | P(se.nr_migrations); |
cc367732 | 1010 | |
cb251765 | 1011 | if (schedstat_enabled()) { |
cc367732 IM |
1012 | u64 avg_atom, avg_per_cpu; |
1013 | ||
ceeadb83 | 1014 | PN_SCHEDSTAT(sum_sleep_runtime); |
847fc0cd | 1015 | PN_SCHEDSTAT(sum_block_runtime); |
ceeadb83 YS |
1016 | PN_SCHEDSTAT(wait_start); |
1017 | PN_SCHEDSTAT(sleep_start); | |
1018 | PN_SCHEDSTAT(block_start); | |
1019 | PN_SCHEDSTAT(sleep_max); | |
1020 | PN_SCHEDSTAT(block_max); | |
1021 | PN_SCHEDSTAT(exec_max); | |
1022 | PN_SCHEDSTAT(slice_max); | |
1023 | PN_SCHEDSTAT(wait_max); | |
1024 | PN_SCHEDSTAT(wait_sum); | |
1025 | P_SCHEDSTAT(wait_count); | |
1026 | PN_SCHEDSTAT(iowait_sum); | |
1027 | P_SCHEDSTAT(iowait_count); | |
1028 | P_SCHEDSTAT(nr_migrations_cold); | |
1029 | P_SCHEDSTAT(nr_failed_migrations_affine); | |
1030 | P_SCHEDSTAT(nr_failed_migrations_running); | |
1031 | P_SCHEDSTAT(nr_failed_migrations_hot); | |
1032 | P_SCHEDSTAT(nr_forced_migrations); | |
1033 | P_SCHEDSTAT(nr_wakeups); | |
1034 | P_SCHEDSTAT(nr_wakeups_sync); | |
1035 | P_SCHEDSTAT(nr_wakeups_migrate); | |
1036 | P_SCHEDSTAT(nr_wakeups_local); | |
1037 | P_SCHEDSTAT(nr_wakeups_remote); | |
1038 | P_SCHEDSTAT(nr_wakeups_affine); | |
1039 | P_SCHEDSTAT(nr_wakeups_affine_attempts); | |
1040 | P_SCHEDSTAT(nr_wakeups_passive); | |
1041 | P_SCHEDSTAT(nr_wakeups_idle); | |
cb251765 | 1042 | |
cc367732 IM |
1043 | avg_atom = p->se.sum_exec_runtime; |
1044 | if (nr_switches) | |
b0ab99e7 | 1045 | avg_atom = div64_ul(avg_atom, nr_switches); |
cc367732 IM |
1046 | else |
1047 | avg_atom = -1LL; | |
1048 | ||
1049 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 1050 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
1051 | avg_per_cpu = div64_u64(avg_per_cpu, |
1052 | p->se.nr_migrations); | |
c1a89740 | 1053 | } else { |
cc367732 | 1054 | avg_per_cpu = -1LL; |
c1a89740 | 1055 | } |
cc367732 IM |
1056 | |
1057 | __PN(avg_atom); | |
1058 | __PN(avg_per_cpu); | |
4feee7d1 JD |
1059 | |
1060 | #ifdef CONFIG_SCHED_CORE | |
1061 | PN_SCHEDSTAT(core_forceidle_sum); | |
1062 | #endif | |
cc367732 | 1063 | } |
4fa8d299 | 1064 | |
cc367732 | 1065 | __P(nr_switches); |
9e3bf946 VS |
1066 | __PS("nr_voluntary_switches", p->nvcsw); |
1067 | __PS("nr_involuntary_switches", p->nivcsw); | |
cc367732 | 1068 | |
43ae34cb | 1069 | P(se.load.weight); |
333bb864 | 1070 | #ifdef CONFIG_SMP |
9d89c257 | 1071 | P(se.avg.load_sum); |
9f683953 | 1072 | P(se.avg.runnable_sum); |
9d89c257 YD |
1073 | P(se.avg.util_sum); |
1074 | P(se.avg.load_avg); | |
9f683953 | 1075 | P(se.avg.runnable_avg); |
9d89c257 YD |
1076 | P(se.avg.util_avg); |
1077 | P(se.avg.last_update_time); | |
7f65ea42 | 1078 | P(se.avg.util_est.ewma); |
68d7a190 | 1079 | PM(se.avg.util_est.enqueued, ~UTIL_AVG_UNCHANGED); |
96e74ebf VS |
1080 | #endif |
1081 | #ifdef CONFIG_UCLAMP_TASK | |
ad32bb41 PK |
1082 | __PS("uclamp.min", p->uclamp_req[UCLAMP_MIN].value); |
1083 | __PS("uclamp.max", p->uclamp_req[UCLAMP_MAX].value); | |
96e74ebf VS |
1084 | __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN)); |
1085 | __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX)); | |
939fd731 | 1086 | #endif |
43ae34cb IM |
1087 | P(policy); |
1088 | P(prio); | |
1da1843f | 1089 | if (task_has_dl_policy(p)) { |
59f8c298 TC |
1090 | P(dl.runtime); |
1091 | P(dl.deadline); | |
1092 | } | |
4fa8d299 | 1093 | #undef PN_SCHEDSTAT |
4fa8d299 | 1094 | #undef P_SCHEDSTAT |
43ae34cb IM |
1095 | |
1096 | { | |
29d7b90c | 1097 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
1098 | u64 t0, t1; |
1099 | ||
29d7b90c IM |
1100 | t0 = cpu_clock(this_cpu); |
1101 | t1 = cpu_clock(this_cpu); | |
9e3bf946 | 1102 | __PS("clock-delta", t1-t0); |
43ae34cb | 1103 | } |
b32e86b4 IM |
1104 | |
1105 | sched_show_numa(p, m); | |
43ae34cb IM |
1106 | } |
1107 | ||
1108 | void proc_sched_set_task(struct task_struct *p) | |
1109 | { | |
6cfb0d5d | 1110 | #ifdef CONFIG_SCHEDSTATS |
ceeadb83 | 1111 | memset(&p->stats, 0, sizeof(p->stats)); |
6cfb0d5d | 1112 | #endif |
43ae34cb | 1113 | } |
c006fac5 PT |
1114 | |
1115 | void resched_latency_warn(int cpu, u64 latency) | |
1116 | { | |
1117 | static DEFINE_RATELIMIT_STATE(latency_check_ratelimit, 60 * 60 * HZ, 1); | |
1118 | ||
1119 | WARN(__ratelimit(&latency_check_ratelimit), | |
1120 | "sched: CPU %d need_resched set for > %llu ns (%d ticks) " | |
1121 | "without schedule\n", | |
1122 | cpu, latency, cpu_rq(cpu)->ticks_without_resched); | |
1123 | } |