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> |
43ae34cb | 19 | |
029632fb PZ |
20 | #include "sched.h" |
21 | ||
efe25c2c BR |
22 | static DEFINE_SPINLOCK(sched_debug_lock); |
23 | ||
43ae34cb IM |
24 | /* |
25 | * This allows printing both to /proc/sched_debug and | |
26 | * to the console | |
27 | */ | |
28 | #define SEQ_printf(m, x...) \ | |
29 | do { \ | |
30 | if (m) \ | |
31 | seq_printf(m, x); \ | |
32 | else \ | |
33 | printk(x); \ | |
34 | } while (0) | |
35 | ||
ef83a571 IM |
36 | /* |
37 | * Ease the printing of nsec fields: | |
38 | */ | |
90b2628f | 39 | static long long nsec_high(unsigned long long nsec) |
ef83a571 | 40 | { |
90b2628f | 41 | if ((long long)nsec < 0) { |
ef83a571 IM |
42 | nsec = -nsec; |
43 | do_div(nsec, 1000000); | |
44 | return -nsec; | |
45 | } | |
46 | do_div(nsec, 1000000); | |
47 | ||
48 | return nsec; | |
49 | } | |
50 | ||
90b2628f | 51 | static unsigned long nsec_low(unsigned long long nsec) |
ef83a571 | 52 | { |
90b2628f | 53 | if ((long long)nsec < 0) |
ef83a571 IM |
54 | nsec = -nsec; |
55 | ||
56 | return do_div(nsec, 1000000); | |
57 | } | |
58 | ||
59 | #define SPLIT_NS(x) nsec_high(x), nsec_low(x) | |
60 | ||
ff9b48c3 | 61 | #ifdef CONFIG_FAIR_GROUP_SCHED |
5091faa4 | 62 | static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg) |
ff9b48c3 BR |
63 | { |
64 | struct sched_entity *se = tg->se[cpu]; | |
ff9b48c3 BR |
65 | |
66 | #define P(F) \ | |
67 | SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F) | |
68 | #define PN(F) \ | |
69 | SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
70 | ||
18bf2805 BS |
71 | if (!se) { |
72 | struct sched_avg *avg = &cpu_rq(cpu)->avg; | |
73 | P(avg->runnable_avg_sum); | |
74 | P(avg->runnable_avg_period); | |
75 | return; | |
76 | } | |
77 | ||
78 | ||
ff9b48c3 BR |
79 | PN(se->exec_start); |
80 | PN(se->vruntime); | |
81 | PN(se->sum_exec_runtime); | |
82 | #ifdef CONFIG_SCHEDSTATS | |
41acab88 LDM |
83 | PN(se->statistics.wait_start); |
84 | PN(se->statistics.sleep_start); | |
85 | PN(se->statistics.block_start); | |
86 | PN(se->statistics.sleep_max); | |
87 | PN(se->statistics.block_max); | |
88 | PN(se->statistics.exec_max); | |
89 | PN(se->statistics.slice_max); | |
90 | PN(se->statistics.wait_max); | |
91 | PN(se->statistics.wait_sum); | |
92 | P(se->statistics.wait_count); | |
ff9b48c3 BR |
93 | #endif |
94 | P(se->load.weight); | |
9d85f21c PT |
95 | #ifdef CONFIG_SMP |
96 | P(se->avg.runnable_avg_sum); | |
97 | P(se->avg.runnable_avg_period); | |
2dac754e | 98 | P(se->avg.load_avg_contrib); |
9ee474f5 | 99 | P(se->avg.decay_count); |
9d85f21c | 100 | #endif |
ff9b48c3 BR |
101 | #undef PN |
102 | #undef P | |
103 | } | |
104 | #endif | |
105 | ||
efe25c2c BR |
106 | #ifdef CONFIG_CGROUP_SCHED |
107 | static char group_path[PATH_MAX]; | |
108 | ||
109 | static char *task_group_path(struct task_group *tg) | |
110 | { | |
8ecedd7a BR |
111 | if (autogroup_path(tg, group_path, PATH_MAX)) |
112 | return group_path; | |
113 | ||
e61734c5 | 114 | return cgroup_path(tg->css.cgroup, group_path, PATH_MAX); |
efe25c2c BR |
115 | } |
116 | #endif | |
117 | ||
43ae34cb | 118 | static void |
a48da48b | 119 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) |
43ae34cb IM |
120 | { |
121 | if (rq->curr == p) | |
122 | SEQ_printf(m, "R"); | |
123 | else | |
124 | SEQ_printf(m, " "); | |
125 | ||
ef83a571 | 126 | SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ", |
fc840914 | 127 | p->comm, task_pid_nr(p), |
ef83a571 | 128 | SPLIT_NS(p->se.vruntime), |
43ae34cb | 129 | (long long)(p->nvcsw + p->nivcsw), |
6f605d83 | 130 | p->prio); |
6cfb0d5d | 131 | #ifdef CONFIG_SCHEDSTATS |
d19ca308 | 132 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", |
ef83a571 IM |
133 | SPLIT_NS(p->se.vruntime), |
134 | SPLIT_NS(p->se.sum_exec_runtime), | |
41acab88 | 135 | SPLIT_NS(p->se.statistics.sum_sleep_runtime)); |
6cfb0d5d | 136 | #else |
d19ca308 | 137 | SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld", |
ef83a571 | 138 | 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L); |
6cfb0d5d | 139 | #endif |
b32e86b4 | 140 | #ifdef CONFIG_NUMA_BALANCING |
de1b301a | 141 | SEQ_printf(m, " %d", task_node(p)); |
b32e86b4 | 142 | #endif |
efe25c2c BR |
143 | #ifdef CONFIG_CGROUP_SCHED |
144 | SEQ_printf(m, " %s", task_group_path(task_group(p))); | |
145 | #endif | |
d19ca308 | 146 | |
d19ca308 | 147 | SEQ_printf(m, "\n"); |
43ae34cb IM |
148 | } |
149 | ||
a48da48b | 150 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) |
43ae34cb IM |
151 | { |
152 | struct task_struct *g, *p; | |
ab63a633 | 153 | unsigned long flags; |
43ae34cb IM |
154 | |
155 | SEQ_printf(m, | |
156 | "\nrunnable tasks:\n" | |
c86da3a3 MG |
157 | " task PID tree-key switches prio" |
158 | " exec-runtime sum-exec sum-sleep\n" | |
1a75b94f | 159 | "------------------------------------------------------" |
c86da3a3 | 160 | "----------------------------------------------------\n"); |
43ae34cb | 161 | |
ab63a633 | 162 | read_lock_irqsave(&tasklist_lock, flags); |
43ae34cb IM |
163 | |
164 | do_each_thread(g, p) { | |
b32e86b4 | 165 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
166 | continue; |
167 | ||
a48da48b | 168 | print_task(m, rq, p); |
43ae34cb IM |
169 | } while_each_thread(g, p); |
170 | ||
ab63a633 | 171 | read_unlock_irqrestore(&tasklist_lock, flags); |
43ae34cb IM |
172 | } |
173 | ||
5cef9eca | 174 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 175 | { |
86d9560c IM |
176 | s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, |
177 | spread, rq0_min_vruntime, spread0; | |
348ec61e | 178 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
179 | struct sched_entity *last; |
180 | unsigned long flags; | |
181 | ||
efe25c2c BR |
182 | #ifdef CONFIG_FAIR_GROUP_SCHED |
183 | SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); | |
184 | #else | |
ada18de2 | 185 | SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); |
efe25c2c | 186 | #endif |
ef83a571 IM |
187 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
188 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 189 | |
05fa785c | 190 | raw_spin_lock_irqsave(&rq->lock, flags); |
67e12eac | 191 | if (cfs_rq->rb_leftmost) |
ac53db59 | 192 | MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime; |
67e12eac IM |
193 | last = __pick_last_entity(cfs_rq); |
194 | if (last) | |
195 | max_vruntime = last->vruntime; | |
5ac5c4d6 | 196 | min_vruntime = cfs_rq->min_vruntime; |
348ec61e | 197 | rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime; |
05fa785c | 198 | raw_spin_unlock_irqrestore(&rq->lock, flags); |
ef83a571 IM |
199 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime", |
200 | SPLIT_NS(MIN_vruntime)); | |
201 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", | |
202 | SPLIT_NS(min_vruntime)); | |
203 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime", | |
204 | SPLIT_NS(max_vruntime)); | |
67e12eac | 205 | spread = max_vruntime - MIN_vruntime; |
ef83a571 IM |
206 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", |
207 | SPLIT_NS(spread)); | |
86d9560c | 208 | spread0 = min_vruntime - rq0_min_vruntime; |
ef83a571 IM |
209 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0", |
210 | SPLIT_NS(spread0)); | |
5ac5c4d6 | 211 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 212 | cfs_rq->nr_spread_over); |
c82513e5 | 213 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
2069dd75 | 214 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 215 | #ifdef CONFIG_SMP |
72a4cf20 | 216 | SEQ_printf(m, " .%-30s: %ld\n", "runnable_load_avg", |
2dac754e | 217 | cfs_rq->runnable_load_avg); |
72a4cf20 | 218 | SEQ_printf(m, " .%-30s: %ld\n", "blocked_load_avg", |
9ee474f5 | 219 | cfs_rq->blocked_load_avg); |
333bb864 | 220 | #ifdef CONFIG_FAIR_GROUP_SCHED |
bf5b986e | 221 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_contrib", |
c566e8e9 | 222 | cfs_rq->tg_load_contrib); |
bb17f655 PT |
223 | SEQ_printf(m, " .%-30s: %d\n", "tg_runnable_contrib", |
224 | cfs_rq->tg_runnable_contrib); | |
333bb864 AS |
225 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
226 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
bb17f655 PT |
227 | SEQ_printf(m, " .%-30s: %d\n", "tg->runnable_avg", |
228 | atomic_read(&cfs_rq->tg->runnable_avg)); | |
c09595f6 | 229 | #endif |
333bb864 | 230 | #endif |
f9f9ffc2 BS |
231 | #ifdef CONFIG_CFS_BANDWIDTH |
232 | SEQ_printf(m, " .%-30s: %d\n", "tg->cfs_bandwidth.timer_active", | |
233 | cfs_rq->tg->cfs_bandwidth.timer_active); | |
234 | SEQ_printf(m, " .%-30s: %d\n", "throttled", | |
235 | cfs_rq->throttled); | |
236 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
237 | cfs_rq->throttle_count); | |
238 | #endif | |
2069dd75 | 239 | |
333bb864 | 240 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 241 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 242 | #endif |
43ae34cb IM |
243 | } |
244 | ||
ada18de2 PZ |
245 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
246 | { | |
efe25c2c BR |
247 | #ifdef CONFIG_RT_GROUP_SCHED |
248 | SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); | |
249 | #else | |
ada18de2 | 250 | SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); |
efe25c2c | 251 | #endif |
ada18de2 PZ |
252 | |
253 | #define P(x) \ | |
254 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
255 | #define PN(x) \ | |
256 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
257 | ||
258 | P(rt_nr_running); | |
259 | P(rt_throttled); | |
260 | PN(rt_time); | |
261 | PN(rt_runtime); | |
262 | ||
263 | #undef PN | |
264 | #undef P | |
265 | } | |
266 | ||
5bb6b1ea PZ |
267 | extern __read_mostly int sched_clock_running; |
268 | ||
a48da48b | 269 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 270 | { |
348ec61e | 271 | struct rq *rq = cpu_rq(cpu); |
efe25c2c | 272 | unsigned long flags; |
43ae34cb IM |
273 | |
274 | #ifdef CONFIG_X86 | |
275 | { | |
276 | unsigned int freq = cpu_khz ? : 1; | |
277 | ||
bbbfeac9 | 278 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
279 | cpu, freq / 1000, (freq % 1000)); |
280 | } | |
281 | #else | |
bbbfeac9 | 282 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
283 | #endif |
284 | ||
13e099d2 PZ |
285 | #define P(x) \ |
286 | do { \ | |
287 | if (sizeof(rq->x) == 4) \ | |
288 | SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \ | |
289 | else \ | |
290 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
291 | } while (0) | |
292 | ||
ef83a571 IM |
293 | #define PN(x) \ |
294 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
295 | |
296 | P(nr_running); | |
297 | SEQ_printf(m, " .%-30s: %lu\n", "load", | |
495eca49 | 298 | rq->load.weight); |
43ae34cb IM |
299 | P(nr_switches); |
300 | P(nr_load_updates); | |
301 | P(nr_uninterruptible); | |
ef83a571 | 302 | PN(next_balance); |
fc840914 | 303 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 304 | PN(clock); |
43ae34cb IM |
305 | P(cpu_load[0]); |
306 | P(cpu_load[1]); | |
307 | P(cpu_load[2]); | |
308 | P(cpu_load[3]); | |
309 | P(cpu_load[4]); | |
310 | #undef P | |
ef83a571 | 311 | #undef PN |
43ae34cb | 312 | |
5ac5c4d6 PZ |
313 | #ifdef CONFIG_SCHEDSTATS |
314 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n); | |
1b9508f6 | 315 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
5ac5c4d6 | 316 | |
5ac5c4d6 PZ |
317 | P(yld_count); |
318 | ||
5ac5c4d6 PZ |
319 | P(sched_count); |
320 | P(sched_goidle); | |
1b9508f6 MG |
321 | #ifdef CONFIG_SMP |
322 | P64(avg_idle); | |
323 | #endif | |
5ac5c4d6 PZ |
324 | |
325 | P(ttwu_count); | |
326 | P(ttwu_local); | |
327 | ||
5ac5c4d6 | 328 | #undef P |
fce20979 | 329 | #undef P64 |
5ac5c4d6 | 330 | #endif |
efe25c2c | 331 | spin_lock_irqsave(&sched_debug_lock, flags); |
5cef9eca | 332 | print_cfs_stats(m, cpu); |
ada18de2 | 333 | print_rt_stats(m, cpu); |
43ae34cb | 334 | |
efe25c2c | 335 | rcu_read_lock(); |
a48da48b | 336 | print_rq(m, rq, cpu); |
efe25c2c BR |
337 | rcu_read_unlock(); |
338 | spin_unlock_irqrestore(&sched_debug_lock, flags); | |
bbbfeac9 | 339 | SEQ_printf(m, "\n"); |
43ae34cb IM |
340 | } |
341 | ||
1983a922 CE |
342 | static const char *sched_tunable_scaling_names[] = { |
343 | "none", | |
344 | "logaritmic", | |
345 | "linear" | |
346 | }; | |
347 | ||
bbbfeac9 | 348 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 349 | { |
5bb6b1ea PZ |
350 | u64 ktime, sched_clk, cpu_clk; |
351 | unsigned long flags; | |
43ae34cb | 352 | |
5bb6b1ea PZ |
353 | local_irq_save(flags); |
354 | ktime = ktime_to_ns(ktime_get()); | |
355 | sched_clk = sched_clock(); | |
356 | cpu_clk = local_clock(); | |
357 | local_irq_restore(flags); | |
358 | ||
b32e86b4 | 359 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
360 | init_utsname()->release, |
361 | (int)strcspn(init_utsname()->version, " "), | |
362 | init_utsname()->version); | |
363 | ||
5bb6b1ea PZ |
364 | #define P(x) \ |
365 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
366 | #define PN(x) \ | |
367 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
368 | PN(ktime); | |
369 | PN(sched_clk); | |
370 | PN(cpu_clk); | |
371 | P(jiffies); | |
372 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 373 | P(sched_clock_stable()); |
5bb6b1ea PZ |
374 | #endif |
375 | #undef PN | |
376 | #undef P | |
377 | ||
378 | SEQ_printf(m, "\n"); | |
379 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 380 | |
1aa4731e | 381 | #define P(x) \ |
d822cece | 382 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 383 | #define PN(x) \ |
d822cece | 384 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
1aa4731e | 385 | PN(sysctl_sched_latency); |
b2be5e96 | 386 | PN(sysctl_sched_min_granularity); |
1aa4731e | 387 | PN(sysctl_sched_wakeup_granularity); |
eebef746 | 388 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
389 | P(sysctl_sched_features); |
390 | #undef PN | |
391 | #undef P | |
392 | ||
bbbfeac9 NZ |
393 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
394 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
395 | sysctl_sched_tunable_scaling, |
396 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
397 | SEQ_printf(m, "\n"); |
398 | } | |
1983a922 | 399 | |
bbbfeac9 NZ |
400 | static int sched_debug_show(struct seq_file *m, void *v) |
401 | { | |
402 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 403 | |
bbbfeac9 NZ |
404 | if (cpu != -1) |
405 | print_cpu(m, cpu); | |
406 | else | |
407 | sched_debug_header(m); | |
43ae34cb IM |
408 | |
409 | return 0; | |
410 | } | |
411 | ||
029632fb | 412 | void sysrq_sched_debug_show(void) |
43ae34cb | 413 | { |
bbbfeac9 NZ |
414 | int cpu; |
415 | ||
416 | sched_debug_header(NULL); | |
417 | for_each_online_cpu(cpu) | |
418 | print_cpu(NULL, cpu); | |
419 | ||
420 | } | |
421 | ||
422 | /* | |
423 | * This itererator needs some explanation. | |
424 | * It returns 1 for the header position. | |
425 | * This means 2 is cpu 0. | |
426 | * In a hotplugged system some cpus, including cpu 0, may be missing so we have | |
427 | * to use cpumask_* to iterate over the cpus. | |
428 | */ | |
429 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
430 | { | |
431 | unsigned long n = *offset; | |
432 | ||
433 | if (n == 0) | |
434 | return (void *) 1; | |
435 | ||
436 | n--; | |
437 | ||
438 | if (n > 0) | |
439 | n = cpumask_next(n - 1, cpu_online_mask); | |
440 | else | |
441 | n = cpumask_first(cpu_online_mask); | |
442 | ||
443 | *offset = n + 1; | |
444 | ||
445 | if (n < nr_cpu_ids) | |
446 | return (void *)(unsigned long)(n + 2); | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
451 | { | |
452 | (*offset)++; | |
453 | return sched_debug_start(file, offset); | |
454 | } | |
455 | ||
456 | static void sched_debug_stop(struct seq_file *file, void *data) | |
457 | { | |
458 | } | |
459 | ||
460 | static const struct seq_operations sched_debug_sops = { | |
461 | .start = sched_debug_start, | |
462 | .next = sched_debug_next, | |
463 | .stop = sched_debug_stop, | |
464 | .show = sched_debug_show, | |
465 | }; | |
466 | ||
467 | static int sched_debug_release(struct inode *inode, struct file *file) | |
468 | { | |
469 | seq_release(inode, file); | |
470 | ||
471 | return 0; | |
43ae34cb IM |
472 | } |
473 | ||
474 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
475 | { | |
bbbfeac9 NZ |
476 | int ret = 0; |
477 | ||
478 | ret = seq_open(filp, &sched_debug_sops); | |
479 | ||
480 | return ret; | |
43ae34cb IM |
481 | } |
482 | ||
0dbee3a6 | 483 | static const struct file_operations sched_debug_fops = { |
43ae34cb IM |
484 | .open = sched_debug_open, |
485 | .read = seq_read, | |
486 | .llseek = seq_lseek, | |
bbbfeac9 | 487 | .release = sched_debug_release, |
43ae34cb IM |
488 | }; |
489 | ||
490 | static int __init init_sched_debug_procfs(void) | |
491 | { | |
492 | struct proc_dir_entry *pe; | |
493 | ||
a9cf4ddb | 494 | pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops); |
43ae34cb IM |
495 | if (!pe) |
496 | return -ENOMEM; | |
43ae34cb IM |
497 | return 0; |
498 | } | |
499 | ||
500 | __initcall(init_sched_debug_procfs); | |
501 | ||
b32e86b4 IM |
502 | #define __P(F) \ |
503 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) | |
504 | #define P(F) \ | |
505 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) | |
506 | #define __PN(F) \ | |
507 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
508 | #define PN(F) \ | |
509 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) | |
510 | ||
511 | ||
512 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) | |
513 | { | |
514 | #ifdef CONFIG_NUMA_BALANCING | |
515 | struct mempolicy *pol; | |
516 | int node, i; | |
517 | ||
518 | if (p->mm) | |
519 | P(mm->numa_scan_seq); | |
520 | ||
521 | task_lock(p); | |
522 | pol = p->mempolicy; | |
523 | if (pol && !(pol->flags & MPOL_F_MORON)) | |
524 | pol = NULL; | |
525 | mpol_get(pol); | |
526 | task_unlock(p); | |
527 | ||
528 | SEQ_printf(m, "numa_migrations, %ld\n", xchg(&p->numa_pages_migrated, 0)); | |
529 | ||
530 | for_each_online_node(node) { | |
531 | for (i = 0; i < 2; i++) { | |
532 | unsigned long nr_faults = -1; | |
533 | int cpu_current, home_node; | |
534 | ||
535 | if (p->numa_faults) | |
536 | nr_faults = p->numa_faults[2*node + i]; | |
537 | ||
538 | cpu_current = !i ? (task_node(p) == node) : | |
539 | (pol && node_isset(node, pol->v.nodes)); | |
540 | ||
541 | home_node = (p->numa_preferred_nid == node); | |
542 | ||
543 | SEQ_printf(m, "numa_faults, %d, %d, %d, %d, %ld\n", | |
544 | i, node, cpu_current, home_node, nr_faults); | |
545 | } | |
546 | } | |
547 | ||
548 | mpol_put(pol); | |
549 | #endif | |
550 | } | |
551 | ||
43ae34cb IM |
552 | void proc_sched_show_task(struct task_struct *p, struct seq_file *m) |
553 | { | |
cc367732 | 554 | unsigned long nr_switches; |
43ae34cb | 555 | |
fc840914 | 556 | SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p), |
5089a976 | 557 | get_nr_threads(p)); |
2d92f227 | 558 | SEQ_printf(m, |
add332a1 KB |
559 | "---------------------------------------------------------" |
560 | "----------\n"); | |
cc367732 | 561 | #define __P(F) \ |
add332a1 | 562 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) |
43ae34cb | 563 | #define P(F) \ |
add332a1 | 564 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) |
cc367732 | 565 | #define __PN(F) \ |
add332a1 | 566 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) |
ef83a571 | 567 | #define PN(F) \ |
add332a1 | 568 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) |
43ae34cb | 569 | |
ef83a571 IM |
570 | PN(se.exec_start); |
571 | PN(se.vruntime); | |
572 | PN(se.sum_exec_runtime); | |
6cfb0d5d | 573 | |
cc367732 IM |
574 | nr_switches = p->nvcsw + p->nivcsw; |
575 | ||
6cfb0d5d | 576 | #ifdef CONFIG_SCHEDSTATS |
41acab88 LDM |
577 | PN(se.statistics.wait_start); |
578 | PN(se.statistics.sleep_start); | |
579 | PN(se.statistics.block_start); | |
580 | PN(se.statistics.sleep_max); | |
581 | PN(se.statistics.block_max); | |
582 | PN(se.statistics.exec_max); | |
583 | PN(se.statistics.slice_max); | |
584 | PN(se.statistics.wait_max); | |
585 | PN(se.statistics.wait_sum); | |
586 | P(se.statistics.wait_count); | |
587 | PN(se.statistics.iowait_sum); | |
588 | P(se.statistics.iowait_count); | |
cc367732 | 589 | P(se.nr_migrations); |
41acab88 LDM |
590 | P(se.statistics.nr_migrations_cold); |
591 | P(se.statistics.nr_failed_migrations_affine); | |
592 | P(se.statistics.nr_failed_migrations_running); | |
593 | P(se.statistics.nr_failed_migrations_hot); | |
594 | P(se.statistics.nr_forced_migrations); | |
595 | P(se.statistics.nr_wakeups); | |
596 | P(se.statistics.nr_wakeups_sync); | |
597 | P(se.statistics.nr_wakeups_migrate); | |
598 | P(se.statistics.nr_wakeups_local); | |
599 | P(se.statistics.nr_wakeups_remote); | |
600 | P(se.statistics.nr_wakeups_affine); | |
601 | P(se.statistics.nr_wakeups_affine_attempts); | |
602 | P(se.statistics.nr_wakeups_passive); | |
603 | P(se.statistics.nr_wakeups_idle); | |
cc367732 IM |
604 | |
605 | { | |
606 | u64 avg_atom, avg_per_cpu; | |
607 | ||
608 | avg_atom = p->se.sum_exec_runtime; | |
609 | if (nr_switches) | |
610 | do_div(avg_atom, nr_switches); | |
611 | else | |
612 | avg_atom = -1LL; | |
613 | ||
614 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 615 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
616 | avg_per_cpu = div64_u64(avg_per_cpu, |
617 | p->se.nr_migrations); | |
c1a89740 | 618 | } else { |
cc367732 | 619 | avg_per_cpu = -1LL; |
c1a89740 | 620 | } |
cc367732 IM |
621 | |
622 | __PN(avg_atom); | |
623 | __PN(avg_per_cpu); | |
624 | } | |
6cfb0d5d | 625 | #endif |
cc367732 | 626 | __P(nr_switches); |
add332a1 | 627 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 | 628 | "nr_voluntary_switches", (long long)p->nvcsw); |
add332a1 | 629 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 IM |
630 | "nr_involuntary_switches", (long long)p->nivcsw); |
631 | ||
43ae34cb | 632 | P(se.load.weight); |
333bb864 | 633 | #ifdef CONFIG_SMP |
939fd731 KB |
634 | P(se.avg.runnable_avg_sum); |
635 | P(se.avg.runnable_avg_period); | |
636 | P(se.avg.load_avg_contrib); | |
637 | P(se.avg.decay_count); | |
638 | #endif | |
43ae34cb IM |
639 | P(policy); |
640 | P(prio); | |
ef83a571 | 641 | #undef PN |
cc367732 IM |
642 | #undef __PN |
643 | #undef P | |
644 | #undef __P | |
43ae34cb IM |
645 | |
646 | { | |
29d7b90c | 647 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
648 | u64 t0, t1; |
649 | ||
29d7b90c IM |
650 | t0 = cpu_clock(this_cpu); |
651 | t1 = cpu_clock(this_cpu); | |
add332a1 | 652 | SEQ_printf(m, "%-45s:%21Ld\n", |
43ae34cb IM |
653 | "clock-delta", (long long)(t1-t0)); |
654 | } | |
b32e86b4 IM |
655 | |
656 | sched_show_numa(p, m); | |
43ae34cb IM |
657 | } |
658 | ||
659 | void proc_sched_set_task(struct task_struct *p) | |
660 | { | |
6cfb0d5d | 661 | #ifdef CONFIG_SCHEDSTATS |
41acab88 | 662 | memset(&p->se.statistics, 0, sizeof(p->se.statistics)); |
6cfb0d5d | 663 | #endif |
43ae34cb | 664 | } |