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Commit | Line | Data |
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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 | ||
ff9b48c3 | 192 | #ifdef CONFIG_FAIR_GROUP_SCHED |
5091faa4 | 193 | static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg) |
ff9b48c3 BR |
194 | { |
195 | struct sched_entity *se = tg->se[cpu]; | |
ff9b48c3 BR |
196 | |
197 | #define P(F) \ | |
198 | SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F) | |
199 | #define PN(F) \ | |
200 | SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
201 | ||
cd126afe | 202 | if (!se) |
18bf2805 | 203 | return; |
18bf2805 | 204 | |
ff9b48c3 BR |
205 | PN(se->exec_start); |
206 | PN(se->vruntime); | |
207 | PN(se->sum_exec_runtime); | |
208 | #ifdef CONFIG_SCHEDSTATS | |
cb251765 MG |
209 | if (schedstat_enabled()) { |
210 | PN(se->statistics.wait_start); | |
211 | PN(se->statistics.sleep_start); | |
212 | PN(se->statistics.block_start); | |
213 | PN(se->statistics.sleep_max); | |
214 | PN(se->statistics.block_max); | |
215 | PN(se->statistics.exec_max); | |
216 | PN(se->statistics.slice_max); | |
217 | PN(se->statistics.wait_max); | |
218 | PN(se->statistics.wait_sum); | |
219 | P(se->statistics.wait_count); | |
220 | } | |
ff9b48c3 BR |
221 | #endif |
222 | P(se->load.weight); | |
9d85f21c | 223 | #ifdef CONFIG_SMP |
9d89c257 YD |
224 | P(se->avg.load_avg); |
225 | P(se->avg.util_avg); | |
9d85f21c | 226 | #endif |
ff9b48c3 BR |
227 | #undef PN |
228 | #undef P | |
229 | } | |
230 | #endif | |
231 | ||
efe25c2c BR |
232 | #ifdef CONFIG_CGROUP_SCHED |
233 | static char group_path[PATH_MAX]; | |
234 | ||
235 | static char *task_group_path(struct task_group *tg) | |
236 | { | |
8ecedd7a BR |
237 | if (autogroup_path(tg, group_path, PATH_MAX)) |
238 | return group_path; | |
239 | ||
e61734c5 | 240 | return cgroup_path(tg->css.cgroup, group_path, PATH_MAX); |
efe25c2c BR |
241 | } |
242 | #endif | |
243 | ||
43ae34cb | 244 | static void |
a48da48b | 245 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) |
43ae34cb IM |
246 | { |
247 | if (rq->curr == p) | |
248 | SEQ_printf(m, "R"); | |
249 | else | |
250 | SEQ_printf(m, " "); | |
251 | ||
ef83a571 | 252 | SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ", |
fc840914 | 253 | p->comm, task_pid_nr(p), |
ef83a571 | 254 | SPLIT_NS(p->se.vruntime), |
43ae34cb | 255 | (long long)(p->nvcsw + p->nivcsw), |
6f605d83 | 256 | p->prio); |
6cfb0d5d | 257 | #ifdef CONFIG_SCHEDSTATS |
cb251765 MG |
258 | if (schedstat_enabled()) { |
259 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", | |
260 | SPLIT_NS(p->se.statistics.wait_sum), | |
261 | SPLIT_NS(p->se.sum_exec_runtime), | |
262 | SPLIT_NS(p->se.statistics.sum_sleep_runtime)); | |
263 | } | |
6cfb0d5d | 264 | #else |
33d6176e SD |
265 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", |
266 | 0LL, 0L, | |
267 | SPLIT_NS(p->se.sum_exec_runtime), | |
268 | 0LL, 0L); | |
6cfb0d5d | 269 | #endif |
b32e86b4 | 270 | #ifdef CONFIG_NUMA_BALANCING |
e3d24d0a | 271 | SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); |
b32e86b4 | 272 | #endif |
efe25c2c BR |
273 | #ifdef CONFIG_CGROUP_SCHED |
274 | SEQ_printf(m, " %s", task_group_path(task_group(p))); | |
275 | #endif | |
d19ca308 | 276 | |
d19ca308 | 277 | SEQ_printf(m, "\n"); |
43ae34cb IM |
278 | } |
279 | ||
a48da48b | 280 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) |
43ae34cb IM |
281 | { |
282 | struct task_struct *g, *p; | |
283 | ||
284 | SEQ_printf(m, | |
285 | "\nrunnable tasks:\n" | |
c86da3a3 | 286 | " task PID tree-key switches prio" |
c5f3ab1c | 287 | " wait-time sum-exec sum-sleep\n" |
1a75b94f | 288 | "------------------------------------------------------" |
c86da3a3 | 289 | "----------------------------------------------------\n"); |
43ae34cb | 290 | |
5bd96ab6 | 291 | rcu_read_lock(); |
d38e83c7 | 292 | for_each_process_thread(g, p) { |
b32e86b4 | 293 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
294 | continue; |
295 | ||
a48da48b | 296 | print_task(m, rq, p); |
d38e83c7 | 297 | } |
5bd96ab6 | 298 | rcu_read_unlock(); |
43ae34cb IM |
299 | } |
300 | ||
5cef9eca | 301 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 302 | { |
86d9560c IM |
303 | s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, |
304 | spread, rq0_min_vruntime, spread0; | |
348ec61e | 305 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
306 | struct sched_entity *last; |
307 | unsigned long flags; | |
308 | ||
efe25c2c BR |
309 | #ifdef CONFIG_FAIR_GROUP_SCHED |
310 | SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); | |
311 | #else | |
ada18de2 | 312 | SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); |
efe25c2c | 313 | #endif |
ef83a571 IM |
314 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
315 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 316 | |
05fa785c | 317 | raw_spin_lock_irqsave(&rq->lock, flags); |
67e12eac | 318 | if (cfs_rq->rb_leftmost) |
ac53db59 | 319 | MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime; |
67e12eac IM |
320 | last = __pick_last_entity(cfs_rq); |
321 | if (last) | |
322 | max_vruntime = last->vruntime; | |
5ac5c4d6 | 323 | min_vruntime = cfs_rq->min_vruntime; |
348ec61e | 324 | rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime; |
05fa785c | 325 | raw_spin_unlock_irqrestore(&rq->lock, flags); |
ef83a571 IM |
326 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime", |
327 | SPLIT_NS(MIN_vruntime)); | |
328 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", | |
329 | SPLIT_NS(min_vruntime)); | |
330 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime", | |
331 | SPLIT_NS(max_vruntime)); | |
67e12eac | 332 | spread = max_vruntime - MIN_vruntime; |
ef83a571 IM |
333 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", |
334 | SPLIT_NS(spread)); | |
86d9560c | 335 | spread0 = min_vruntime - rq0_min_vruntime; |
ef83a571 IM |
336 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0", |
337 | SPLIT_NS(spread0)); | |
5ac5c4d6 | 338 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 339 | cfs_rq->nr_spread_over); |
c82513e5 | 340 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
2069dd75 | 341 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 342 | #ifdef CONFIG_SMP |
9d89c257 YD |
343 | SEQ_printf(m, " .%-30s: %lu\n", "load_avg", |
344 | cfs_rq->avg.load_avg); | |
13962234 YD |
345 | SEQ_printf(m, " .%-30s: %lu\n", "runnable_load_avg", |
346 | cfs_rq->runnable_load_avg); | |
9d89c257 YD |
347 | SEQ_printf(m, " .%-30s: %lu\n", "util_avg", |
348 | cfs_rq->avg.util_avg); | |
349 | SEQ_printf(m, " .%-30s: %ld\n", "removed_load_avg", | |
350 | atomic_long_read(&cfs_rq->removed_load_avg)); | |
351 | SEQ_printf(m, " .%-30s: %ld\n", "removed_util_avg", | |
352 | atomic_long_read(&cfs_rq->removed_util_avg)); | |
333bb864 | 353 | #ifdef CONFIG_FAIR_GROUP_SCHED |
9d89c257 YD |
354 | SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib", |
355 | cfs_rq->tg_load_avg_contrib); | |
333bb864 AS |
356 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
357 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
c09595f6 | 358 | #endif |
333bb864 | 359 | #endif |
f9f9ffc2 | 360 | #ifdef CONFIG_CFS_BANDWIDTH |
f9f9ffc2 BS |
361 | SEQ_printf(m, " .%-30s: %d\n", "throttled", |
362 | cfs_rq->throttled); | |
363 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
364 | cfs_rq->throttle_count); | |
365 | #endif | |
2069dd75 | 366 | |
333bb864 | 367 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 368 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 369 | #endif |
43ae34cb IM |
370 | } |
371 | ||
ada18de2 PZ |
372 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
373 | { | |
efe25c2c BR |
374 | #ifdef CONFIG_RT_GROUP_SCHED |
375 | SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); | |
376 | #else | |
ada18de2 | 377 | SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); |
efe25c2c | 378 | #endif |
ada18de2 PZ |
379 | |
380 | #define P(x) \ | |
381 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
382 | #define PN(x) \ | |
383 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
384 | ||
385 | P(rt_nr_running); | |
386 | P(rt_throttled); | |
387 | PN(rt_time); | |
388 | PN(rt_runtime); | |
389 | ||
390 | #undef PN | |
391 | #undef P | |
392 | } | |
393 | ||
acb32132 WL |
394 | void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq) |
395 | { | |
396 | SEQ_printf(m, "\ndl_rq[%d]:\n", cpu); | |
397 | SEQ_printf(m, " .%-30s: %ld\n", "dl_nr_running", dl_rq->dl_nr_running); | |
398 | } | |
399 | ||
5bb6b1ea PZ |
400 | extern __read_mostly int sched_clock_running; |
401 | ||
a48da48b | 402 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 403 | { |
348ec61e | 404 | struct rq *rq = cpu_rq(cpu); |
efe25c2c | 405 | unsigned long flags; |
43ae34cb IM |
406 | |
407 | #ifdef CONFIG_X86 | |
408 | { | |
409 | unsigned int freq = cpu_khz ? : 1; | |
410 | ||
bbbfeac9 | 411 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
412 | cpu, freq / 1000, (freq % 1000)); |
413 | } | |
414 | #else | |
bbbfeac9 | 415 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
416 | #endif |
417 | ||
13e099d2 PZ |
418 | #define P(x) \ |
419 | do { \ | |
420 | if (sizeof(rq->x) == 4) \ | |
421 | SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \ | |
422 | else \ | |
423 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
424 | } while (0) | |
425 | ||
ef83a571 IM |
426 | #define PN(x) \ |
427 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
428 | |
429 | P(nr_running); | |
430 | SEQ_printf(m, " .%-30s: %lu\n", "load", | |
495eca49 | 431 | rq->load.weight); |
43ae34cb IM |
432 | P(nr_switches); |
433 | P(nr_load_updates); | |
434 | P(nr_uninterruptible); | |
ef83a571 | 435 | PN(next_balance); |
fc840914 | 436 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 437 | PN(clock); |
5a537597 | 438 | PN(clock_task); |
43ae34cb IM |
439 | P(cpu_load[0]); |
440 | P(cpu_load[1]); | |
441 | P(cpu_load[2]); | |
442 | P(cpu_load[3]); | |
443 | P(cpu_load[4]); | |
444 | #undef P | |
ef83a571 | 445 | #undef PN |
43ae34cb | 446 | |
5ac5c4d6 PZ |
447 | #ifdef CONFIG_SCHEDSTATS |
448 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n); | |
1b9508f6 | 449 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
5ac5c4d6 | 450 | |
1b9508f6 MG |
451 | #ifdef CONFIG_SMP |
452 | P64(avg_idle); | |
37e6bae8 | 453 | P64(max_idle_balance_cost); |
1b9508f6 | 454 | #endif |
5ac5c4d6 | 455 | |
cb251765 MG |
456 | if (schedstat_enabled()) { |
457 | P(yld_count); | |
458 | P(sched_count); | |
459 | P(sched_goidle); | |
460 | P(ttwu_count); | |
461 | P(ttwu_local); | |
462 | } | |
5ac5c4d6 | 463 | |
5ac5c4d6 | 464 | #undef P |
fce20979 | 465 | #undef P64 |
5ac5c4d6 | 466 | #endif |
efe25c2c | 467 | spin_lock_irqsave(&sched_debug_lock, flags); |
5cef9eca | 468 | print_cfs_stats(m, cpu); |
ada18de2 | 469 | print_rt_stats(m, cpu); |
acb32132 | 470 | print_dl_stats(m, cpu); |
43ae34cb | 471 | |
a48da48b | 472 | print_rq(m, rq, cpu); |
efe25c2c | 473 | spin_unlock_irqrestore(&sched_debug_lock, flags); |
bbbfeac9 | 474 | SEQ_printf(m, "\n"); |
43ae34cb IM |
475 | } |
476 | ||
1983a922 CE |
477 | static const char *sched_tunable_scaling_names[] = { |
478 | "none", | |
479 | "logaritmic", | |
480 | "linear" | |
481 | }; | |
482 | ||
bbbfeac9 | 483 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 484 | { |
5bb6b1ea PZ |
485 | u64 ktime, sched_clk, cpu_clk; |
486 | unsigned long flags; | |
43ae34cb | 487 | |
5bb6b1ea PZ |
488 | local_irq_save(flags); |
489 | ktime = ktime_to_ns(ktime_get()); | |
490 | sched_clk = sched_clock(); | |
491 | cpu_clk = local_clock(); | |
492 | local_irq_restore(flags); | |
493 | ||
b32e86b4 | 494 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
495 | init_utsname()->release, |
496 | (int)strcspn(init_utsname()->version, " "), | |
497 | init_utsname()->version); | |
498 | ||
5bb6b1ea PZ |
499 | #define P(x) \ |
500 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
501 | #define PN(x) \ | |
502 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
503 | PN(ktime); | |
504 | PN(sched_clk); | |
505 | PN(cpu_clk); | |
506 | P(jiffies); | |
507 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 508 | P(sched_clock_stable()); |
5bb6b1ea PZ |
509 | #endif |
510 | #undef PN | |
511 | #undef P | |
512 | ||
513 | SEQ_printf(m, "\n"); | |
514 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 515 | |
1aa4731e | 516 | #define P(x) \ |
d822cece | 517 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 518 | #define PN(x) \ |
d822cece | 519 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
1aa4731e | 520 | PN(sysctl_sched_latency); |
b2be5e96 | 521 | PN(sysctl_sched_min_granularity); |
1aa4731e | 522 | PN(sysctl_sched_wakeup_granularity); |
eebef746 | 523 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
524 | P(sysctl_sched_features); |
525 | #undef PN | |
526 | #undef P | |
527 | ||
bbbfeac9 NZ |
528 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
529 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
530 | sysctl_sched_tunable_scaling, |
531 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
532 | SEQ_printf(m, "\n"); |
533 | } | |
1983a922 | 534 | |
bbbfeac9 NZ |
535 | static int sched_debug_show(struct seq_file *m, void *v) |
536 | { | |
537 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 538 | |
bbbfeac9 NZ |
539 | if (cpu != -1) |
540 | print_cpu(m, cpu); | |
541 | else | |
542 | sched_debug_header(m); | |
43ae34cb IM |
543 | |
544 | return 0; | |
545 | } | |
546 | ||
029632fb | 547 | void sysrq_sched_debug_show(void) |
43ae34cb | 548 | { |
bbbfeac9 NZ |
549 | int cpu; |
550 | ||
551 | sched_debug_header(NULL); | |
552 | for_each_online_cpu(cpu) | |
553 | print_cpu(NULL, cpu); | |
554 | ||
555 | } | |
556 | ||
557 | /* | |
558 | * This itererator needs some explanation. | |
559 | * It returns 1 for the header position. | |
560 | * This means 2 is cpu 0. | |
561 | * In a hotplugged system some cpus, including cpu 0, may be missing so we have | |
562 | * to use cpumask_* to iterate over the cpus. | |
563 | */ | |
564 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
565 | { | |
566 | unsigned long n = *offset; | |
567 | ||
568 | if (n == 0) | |
569 | return (void *) 1; | |
570 | ||
571 | n--; | |
572 | ||
573 | if (n > 0) | |
574 | n = cpumask_next(n - 1, cpu_online_mask); | |
575 | else | |
576 | n = cpumask_first(cpu_online_mask); | |
577 | ||
578 | *offset = n + 1; | |
579 | ||
580 | if (n < nr_cpu_ids) | |
581 | return (void *)(unsigned long)(n + 2); | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
586 | { | |
587 | (*offset)++; | |
588 | return sched_debug_start(file, offset); | |
589 | } | |
590 | ||
591 | static void sched_debug_stop(struct seq_file *file, void *data) | |
592 | { | |
593 | } | |
594 | ||
595 | static const struct seq_operations sched_debug_sops = { | |
596 | .start = sched_debug_start, | |
597 | .next = sched_debug_next, | |
598 | .stop = sched_debug_stop, | |
599 | .show = sched_debug_show, | |
600 | }; | |
601 | ||
602 | static int sched_debug_release(struct inode *inode, struct file *file) | |
603 | { | |
604 | seq_release(inode, file); | |
605 | ||
606 | return 0; | |
43ae34cb IM |
607 | } |
608 | ||
609 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
610 | { | |
bbbfeac9 NZ |
611 | int ret = 0; |
612 | ||
613 | ret = seq_open(filp, &sched_debug_sops); | |
614 | ||
615 | return ret; | |
43ae34cb IM |
616 | } |
617 | ||
0dbee3a6 | 618 | static const struct file_operations sched_debug_fops = { |
43ae34cb IM |
619 | .open = sched_debug_open, |
620 | .read = seq_read, | |
621 | .llseek = seq_lseek, | |
bbbfeac9 | 622 | .release = sched_debug_release, |
43ae34cb IM |
623 | }; |
624 | ||
625 | static int __init init_sched_debug_procfs(void) | |
626 | { | |
627 | struct proc_dir_entry *pe; | |
628 | ||
a9cf4ddb | 629 | pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops); |
43ae34cb IM |
630 | if (!pe) |
631 | return -ENOMEM; | |
43ae34cb IM |
632 | return 0; |
633 | } | |
634 | ||
635 | __initcall(init_sched_debug_procfs); | |
636 | ||
b32e86b4 IM |
637 | #define __P(F) \ |
638 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) | |
639 | #define P(F) \ | |
640 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) | |
641 | #define __PN(F) \ | |
642 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
643 | #define PN(F) \ | |
644 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) | |
645 | ||
646 | ||
397f2378 SD |
647 | #ifdef CONFIG_NUMA_BALANCING |
648 | void print_numa_stats(struct seq_file *m, int node, unsigned long tsf, | |
649 | unsigned long tpf, unsigned long gsf, unsigned long gpf) | |
650 | { | |
651 | SEQ_printf(m, "numa_faults node=%d ", node); | |
652 | SEQ_printf(m, "task_private=%lu task_shared=%lu ", tsf, tpf); | |
653 | SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gsf, gpf); | |
654 | } | |
655 | #endif | |
656 | ||
657 | ||
b32e86b4 IM |
658 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) |
659 | { | |
660 | #ifdef CONFIG_NUMA_BALANCING | |
661 | struct mempolicy *pol; | |
b32e86b4 IM |
662 | |
663 | if (p->mm) | |
664 | P(mm->numa_scan_seq); | |
665 | ||
666 | task_lock(p); | |
667 | pol = p->mempolicy; | |
668 | if (pol && !(pol->flags & MPOL_F_MORON)) | |
669 | pol = NULL; | |
670 | mpol_get(pol); | |
671 | task_unlock(p); | |
672 | ||
397f2378 SD |
673 | P(numa_pages_migrated); |
674 | P(numa_preferred_nid); | |
675 | P(total_numa_faults); | |
676 | SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", | |
677 | task_node(p), task_numa_group_id(p)); | |
678 | show_numa_stats(p, m); | |
b32e86b4 IM |
679 | mpol_put(pol); |
680 | #endif | |
681 | } | |
682 | ||
43ae34cb IM |
683 | void proc_sched_show_task(struct task_struct *p, struct seq_file *m) |
684 | { | |
cc367732 | 685 | unsigned long nr_switches; |
43ae34cb | 686 | |
fc840914 | 687 | SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p), |
5089a976 | 688 | get_nr_threads(p)); |
2d92f227 | 689 | SEQ_printf(m, |
add332a1 KB |
690 | "---------------------------------------------------------" |
691 | "----------\n"); | |
cc367732 | 692 | #define __P(F) \ |
add332a1 | 693 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) |
43ae34cb | 694 | #define P(F) \ |
add332a1 | 695 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) |
cc367732 | 696 | #define __PN(F) \ |
add332a1 | 697 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) |
ef83a571 | 698 | #define PN(F) \ |
add332a1 | 699 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) |
43ae34cb | 700 | |
ef83a571 IM |
701 | PN(se.exec_start); |
702 | PN(se.vruntime); | |
703 | PN(se.sum_exec_runtime); | |
6cfb0d5d | 704 | |
cc367732 IM |
705 | nr_switches = p->nvcsw + p->nivcsw; |
706 | ||
6cfb0d5d | 707 | #ifdef CONFIG_SCHEDSTATS |
cc367732 | 708 | P(se.nr_migrations); |
cc367732 | 709 | |
cb251765 | 710 | if (schedstat_enabled()) { |
cc367732 IM |
711 | u64 avg_atom, avg_per_cpu; |
712 | ||
cb251765 MG |
713 | PN(se.statistics.sum_sleep_runtime); |
714 | PN(se.statistics.wait_start); | |
715 | PN(se.statistics.sleep_start); | |
716 | PN(se.statistics.block_start); | |
717 | PN(se.statistics.sleep_max); | |
718 | PN(se.statistics.block_max); | |
719 | PN(se.statistics.exec_max); | |
720 | PN(se.statistics.slice_max); | |
721 | PN(se.statistics.wait_max); | |
722 | PN(se.statistics.wait_sum); | |
723 | P(se.statistics.wait_count); | |
724 | PN(se.statistics.iowait_sum); | |
725 | P(se.statistics.iowait_count); | |
726 | P(se.statistics.nr_migrations_cold); | |
727 | P(se.statistics.nr_failed_migrations_affine); | |
728 | P(se.statistics.nr_failed_migrations_running); | |
729 | P(se.statistics.nr_failed_migrations_hot); | |
730 | P(se.statistics.nr_forced_migrations); | |
731 | P(se.statistics.nr_wakeups); | |
732 | P(se.statistics.nr_wakeups_sync); | |
733 | P(se.statistics.nr_wakeups_migrate); | |
734 | P(se.statistics.nr_wakeups_local); | |
735 | P(se.statistics.nr_wakeups_remote); | |
736 | P(se.statistics.nr_wakeups_affine); | |
737 | P(se.statistics.nr_wakeups_affine_attempts); | |
738 | P(se.statistics.nr_wakeups_passive); | |
739 | P(se.statistics.nr_wakeups_idle); | |
740 | ||
cc367732 IM |
741 | avg_atom = p->se.sum_exec_runtime; |
742 | if (nr_switches) | |
b0ab99e7 | 743 | avg_atom = div64_ul(avg_atom, nr_switches); |
cc367732 IM |
744 | else |
745 | avg_atom = -1LL; | |
746 | ||
747 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 748 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
749 | avg_per_cpu = div64_u64(avg_per_cpu, |
750 | p->se.nr_migrations); | |
c1a89740 | 751 | } else { |
cc367732 | 752 | avg_per_cpu = -1LL; |
c1a89740 | 753 | } |
cc367732 IM |
754 | |
755 | __PN(avg_atom); | |
756 | __PN(avg_per_cpu); | |
757 | } | |
6cfb0d5d | 758 | #endif |
cc367732 | 759 | __P(nr_switches); |
add332a1 | 760 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 | 761 | "nr_voluntary_switches", (long long)p->nvcsw); |
add332a1 | 762 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 IM |
763 | "nr_involuntary_switches", (long long)p->nivcsw); |
764 | ||
43ae34cb | 765 | P(se.load.weight); |
333bb864 | 766 | #ifdef CONFIG_SMP |
9d89c257 YD |
767 | P(se.avg.load_sum); |
768 | P(se.avg.util_sum); | |
769 | P(se.avg.load_avg); | |
770 | P(se.avg.util_avg); | |
771 | P(se.avg.last_update_time); | |
939fd731 | 772 | #endif |
43ae34cb IM |
773 | P(policy); |
774 | P(prio); | |
ef83a571 | 775 | #undef PN |
cc367732 IM |
776 | #undef __PN |
777 | #undef P | |
778 | #undef __P | |
43ae34cb IM |
779 | |
780 | { | |
29d7b90c | 781 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
782 | u64 t0, t1; |
783 | ||
29d7b90c IM |
784 | t0 = cpu_clock(this_cpu); |
785 | t1 = cpu_clock(this_cpu); | |
add332a1 | 786 | SEQ_printf(m, "%-45s:%21Ld\n", |
43ae34cb IM |
787 | "clock-delta", (long long)(t1-t0)); |
788 | } | |
b32e86b4 IM |
789 | |
790 | sched_show_numa(p, m); | |
43ae34cb IM |
791 | } |
792 | ||
793 | void proc_sched_set_task(struct task_struct *p) | |
794 | { | |
6cfb0d5d | 795 | #ifdef CONFIG_SCHEDSTATS |
41acab88 | 796 | memset(&p->se.statistics, 0, sizeof(p->se.statistics)); |
6cfb0d5d | 797 | #endif |
43ae34cb | 798 | } |