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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> |
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; | |
153 | ||
154 | SEQ_printf(m, | |
155 | "\nrunnable tasks:\n" | |
c86da3a3 MG |
156 | " task PID tree-key switches prio" |
157 | " exec-runtime sum-exec sum-sleep\n" | |
1a75b94f | 158 | "------------------------------------------------------" |
c86da3a3 | 159 | "----------------------------------------------------\n"); |
43ae34cb | 160 | |
5bd96ab6 | 161 | rcu_read_lock(); |
d38e83c7 | 162 | for_each_process_thread(g, p) { |
b32e86b4 | 163 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
164 | continue; |
165 | ||
a48da48b | 166 | print_task(m, rq, p); |
d38e83c7 | 167 | } |
5bd96ab6 | 168 | rcu_read_unlock(); |
43ae34cb IM |
169 | } |
170 | ||
5cef9eca | 171 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 172 | { |
86d9560c IM |
173 | s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, |
174 | spread, rq0_min_vruntime, spread0; | |
348ec61e | 175 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
176 | struct sched_entity *last; |
177 | unsigned long flags; | |
178 | ||
efe25c2c BR |
179 | #ifdef CONFIG_FAIR_GROUP_SCHED |
180 | SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); | |
181 | #else | |
ada18de2 | 182 | SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); |
efe25c2c | 183 | #endif |
ef83a571 IM |
184 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
185 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 186 | |
05fa785c | 187 | raw_spin_lock_irqsave(&rq->lock, flags); |
67e12eac | 188 | if (cfs_rq->rb_leftmost) |
ac53db59 | 189 | MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime; |
67e12eac IM |
190 | last = __pick_last_entity(cfs_rq); |
191 | if (last) | |
192 | max_vruntime = last->vruntime; | |
5ac5c4d6 | 193 | min_vruntime = cfs_rq->min_vruntime; |
348ec61e | 194 | rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime; |
05fa785c | 195 | raw_spin_unlock_irqrestore(&rq->lock, flags); |
ef83a571 IM |
196 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime", |
197 | SPLIT_NS(MIN_vruntime)); | |
198 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", | |
199 | SPLIT_NS(min_vruntime)); | |
200 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime", | |
201 | SPLIT_NS(max_vruntime)); | |
67e12eac | 202 | spread = max_vruntime - MIN_vruntime; |
ef83a571 IM |
203 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", |
204 | SPLIT_NS(spread)); | |
86d9560c | 205 | spread0 = min_vruntime - rq0_min_vruntime; |
ef83a571 IM |
206 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0", |
207 | SPLIT_NS(spread0)); | |
5ac5c4d6 | 208 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 209 | cfs_rq->nr_spread_over); |
c82513e5 | 210 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
2069dd75 | 211 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 212 | #ifdef CONFIG_SMP |
72a4cf20 | 213 | SEQ_printf(m, " .%-30s: %ld\n", "runnable_load_avg", |
2dac754e | 214 | cfs_rq->runnable_load_avg); |
72a4cf20 | 215 | SEQ_printf(m, " .%-30s: %ld\n", "blocked_load_avg", |
9ee474f5 | 216 | cfs_rq->blocked_load_avg); |
333bb864 | 217 | #ifdef CONFIG_FAIR_GROUP_SCHED |
bf5b986e | 218 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_contrib", |
c566e8e9 | 219 | cfs_rq->tg_load_contrib); |
bb17f655 PT |
220 | SEQ_printf(m, " .%-30s: %d\n", "tg_runnable_contrib", |
221 | cfs_rq->tg_runnable_contrib); | |
333bb864 AS |
222 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
223 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
bb17f655 PT |
224 | SEQ_printf(m, " .%-30s: %d\n", "tg->runnable_avg", |
225 | atomic_read(&cfs_rq->tg->runnable_avg)); | |
c09595f6 | 226 | #endif |
333bb864 | 227 | #endif |
f9f9ffc2 BS |
228 | #ifdef CONFIG_CFS_BANDWIDTH |
229 | SEQ_printf(m, " .%-30s: %d\n", "tg->cfs_bandwidth.timer_active", | |
230 | cfs_rq->tg->cfs_bandwidth.timer_active); | |
231 | SEQ_printf(m, " .%-30s: %d\n", "throttled", | |
232 | cfs_rq->throttled); | |
233 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
234 | cfs_rq->throttle_count); | |
235 | #endif | |
2069dd75 | 236 | |
333bb864 | 237 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 238 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 239 | #endif |
43ae34cb IM |
240 | } |
241 | ||
ada18de2 PZ |
242 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
243 | { | |
efe25c2c BR |
244 | #ifdef CONFIG_RT_GROUP_SCHED |
245 | SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); | |
246 | #else | |
ada18de2 | 247 | SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); |
efe25c2c | 248 | #endif |
ada18de2 PZ |
249 | |
250 | #define P(x) \ | |
251 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
252 | #define PN(x) \ | |
253 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
254 | ||
255 | P(rt_nr_running); | |
256 | P(rt_throttled); | |
257 | PN(rt_time); | |
258 | PN(rt_runtime); | |
259 | ||
260 | #undef PN | |
261 | #undef P | |
262 | } | |
263 | ||
5bb6b1ea PZ |
264 | extern __read_mostly int sched_clock_running; |
265 | ||
a48da48b | 266 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 267 | { |
348ec61e | 268 | struct rq *rq = cpu_rq(cpu); |
efe25c2c | 269 | unsigned long flags; |
43ae34cb IM |
270 | |
271 | #ifdef CONFIG_X86 | |
272 | { | |
273 | unsigned int freq = cpu_khz ? : 1; | |
274 | ||
bbbfeac9 | 275 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
276 | cpu, freq / 1000, (freq % 1000)); |
277 | } | |
278 | #else | |
bbbfeac9 | 279 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
280 | #endif |
281 | ||
13e099d2 PZ |
282 | #define P(x) \ |
283 | do { \ | |
284 | if (sizeof(rq->x) == 4) \ | |
285 | SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \ | |
286 | else \ | |
287 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
288 | } while (0) | |
289 | ||
ef83a571 IM |
290 | #define PN(x) \ |
291 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
292 | |
293 | P(nr_running); | |
294 | SEQ_printf(m, " .%-30s: %lu\n", "load", | |
495eca49 | 295 | rq->load.weight); |
43ae34cb IM |
296 | P(nr_switches); |
297 | P(nr_load_updates); | |
298 | P(nr_uninterruptible); | |
ef83a571 | 299 | PN(next_balance); |
fc840914 | 300 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 301 | PN(clock); |
43ae34cb IM |
302 | P(cpu_load[0]); |
303 | P(cpu_load[1]); | |
304 | P(cpu_load[2]); | |
305 | P(cpu_load[3]); | |
306 | P(cpu_load[4]); | |
307 | #undef P | |
ef83a571 | 308 | #undef PN |
43ae34cb | 309 | |
5ac5c4d6 PZ |
310 | #ifdef CONFIG_SCHEDSTATS |
311 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n); | |
1b9508f6 | 312 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
5ac5c4d6 | 313 | |
5ac5c4d6 PZ |
314 | P(yld_count); |
315 | ||
5ac5c4d6 PZ |
316 | P(sched_count); |
317 | P(sched_goidle); | |
1b9508f6 MG |
318 | #ifdef CONFIG_SMP |
319 | P64(avg_idle); | |
37e6bae8 | 320 | P64(max_idle_balance_cost); |
1b9508f6 | 321 | #endif |
5ac5c4d6 PZ |
322 | |
323 | P(ttwu_count); | |
324 | P(ttwu_local); | |
325 | ||
5ac5c4d6 | 326 | #undef P |
fce20979 | 327 | #undef P64 |
5ac5c4d6 | 328 | #endif |
efe25c2c | 329 | spin_lock_irqsave(&sched_debug_lock, flags); |
5cef9eca | 330 | print_cfs_stats(m, cpu); |
ada18de2 | 331 | print_rt_stats(m, cpu); |
43ae34cb | 332 | |
a48da48b | 333 | print_rq(m, rq, cpu); |
efe25c2c | 334 | spin_unlock_irqrestore(&sched_debug_lock, flags); |
bbbfeac9 | 335 | SEQ_printf(m, "\n"); |
43ae34cb IM |
336 | } |
337 | ||
1983a922 CE |
338 | static const char *sched_tunable_scaling_names[] = { |
339 | "none", | |
340 | "logaritmic", | |
341 | "linear" | |
342 | }; | |
343 | ||
bbbfeac9 | 344 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 345 | { |
5bb6b1ea PZ |
346 | u64 ktime, sched_clk, cpu_clk; |
347 | unsigned long flags; | |
43ae34cb | 348 | |
5bb6b1ea PZ |
349 | local_irq_save(flags); |
350 | ktime = ktime_to_ns(ktime_get()); | |
351 | sched_clk = sched_clock(); | |
352 | cpu_clk = local_clock(); | |
353 | local_irq_restore(flags); | |
354 | ||
b32e86b4 | 355 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
356 | init_utsname()->release, |
357 | (int)strcspn(init_utsname()->version, " "), | |
358 | init_utsname()->version); | |
359 | ||
5bb6b1ea PZ |
360 | #define P(x) \ |
361 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
362 | #define PN(x) \ | |
363 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
364 | PN(ktime); | |
365 | PN(sched_clk); | |
366 | PN(cpu_clk); | |
367 | P(jiffies); | |
368 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 369 | P(sched_clock_stable()); |
5bb6b1ea PZ |
370 | #endif |
371 | #undef PN | |
372 | #undef P | |
373 | ||
374 | SEQ_printf(m, "\n"); | |
375 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 376 | |
1aa4731e | 377 | #define P(x) \ |
d822cece | 378 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 379 | #define PN(x) \ |
d822cece | 380 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
1aa4731e | 381 | PN(sysctl_sched_latency); |
b2be5e96 | 382 | PN(sysctl_sched_min_granularity); |
1aa4731e | 383 | PN(sysctl_sched_wakeup_granularity); |
eebef746 | 384 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
385 | P(sysctl_sched_features); |
386 | #undef PN | |
387 | #undef P | |
388 | ||
bbbfeac9 NZ |
389 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
390 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
391 | sysctl_sched_tunable_scaling, |
392 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
393 | SEQ_printf(m, "\n"); |
394 | } | |
1983a922 | 395 | |
bbbfeac9 NZ |
396 | static int sched_debug_show(struct seq_file *m, void *v) |
397 | { | |
398 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 399 | |
bbbfeac9 NZ |
400 | if (cpu != -1) |
401 | print_cpu(m, cpu); | |
402 | else | |
403 | sched_debug_header(m); | |
43ae34cb IM |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
029632fb | 408 | void sysrq_sched_debug_show(void) |
43ae34cb | 409 | { |
bbbfeac9 NZ |
410 | int cpu; |
411 | ||
412 | sched_debug_header(NULL); | |
413 | for_each_online_cpu(cpu) | |
414 | print_cpu(NULL, cpu); | |
415 | ||
416 | } | |
417 | ||
418 | /* | |
419 | * This itererator needs some explanation. | |
420 | * It returns 1 for the header position. | |
421 | * This means 2 is cpu 0. | |
422 | * In a hotplugged system some cpus, including cpu 0, may be missing so we have | |
423 | * to use cpumask_* to iterate over the cpus. | |
424 | */ | |
425 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
426 | { | |
427 | unsigned long n = *offset; | |
428 | ||
429 | if (n == 0) | |
430 | return (void *) 1; | |
431 | ||
432 | n--; | |
433 | ||
434 | if (n > 0) | |
435 | n = cpumask_next(n - 1, cpu_online_mask); | |
436 | else | |
437 | n = cpumask_first(cpu_online_mask); | |
438 | ||
439 | *offset = n + 1; | |
440 | ||
441 | if (n < nr_cpu_ids) | |
442 | return (void *)(unsigned long)(n + 2); | |
443 | return NULL; | |
444 | } | |
445 | ||
446 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
447 | { | |
448 | (*offset)++; | |
449 | return sched_debug_start(file, offset); | |
450 | } | |
451 | ||
452 | static void sched_debug_stop(struct seq_file *file, void *data) | |
453 | { | |
454 | } | |
455 | ||
456 | static const struct seq_operations sched_debug_sops = { | |
457 | .start = sched_debug_start, | |
458 | .next = sched_debug_next, | |
459 | .stop = sched_debug_stop, | |
460 | .show = sched_debug_show, | |
461 | }; | |
462 | ||
463 | static int sched_debug_release(struct inode *inode, struct file *file) | |
464 | { | |
465 | seq_release(inode, file); | |
466 | ||
467 | return 0; | |
43ae34cb IM |
468 | } |
469 | ||
470 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
471 | { | |
bbbfeac9 NZ |
472 | int ret = 0; |
473 | ||
474 | ret = seq_open(filp, &sched_debug_sops); | |
475 | ||
476 | return ret; | |
43ae34cb IM |
477 | } |
478 | ||
0dbee3a6 | 479 | static const struct file_operations sched_debug_fops = { |
43ae34cb IM |
480 | .open = sched_debug_open, |
481 | .read = seq_read, | |
482 | .llseek = seq_lseek, | |
bbbfeac9 | 483 | .release = sched_debug_release, |
43ae34cb IM |
484 | }; |
485 | ||
486 | static int __init init_sched_debug_procfs(void) | |
487 | { | |
488 | struct proc_dir_entry *pe; | |
489 | ||
a9cf4ddb | 490 | pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops); |
43ae34cb IM |
491 | if (!pe) |
492 | return -ENOMEM; | |
43ae34cb IM |
493 | return 0; |
494 | } | |
495 | ||
496 | __initcall(init_sched_debug_procfs); | |
497 | ||
b32e86b4 IM |
498 | #define __P(F) \ |
499 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) | |
500 | #define P(F) \ | |
501 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) | |
502 | #define __PN(F) \ | |
503 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
504 | #define PN(F) \ | |
505 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) | |
506 | ||
507 | ||
508 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) | |
509 | { | |
510 | #ifdef CONFIG_NUMA_BALANCING | |
511 | struct mempolicy *pol; | |
512 | int node, i; | |
513 | ||
514 | if (p->mm) | |
515 | P(mm->numa_scan_seq); | |
516 | ||
517 | task_lock(p); | |
518 | pol = p->mempolicy; | |
519 | if (pol && !(pol->flags & MPOL_F_MORON)) | |
520 | pol = NULL; | |
521 | mpol_get(pol); | |
522 | task_unlock(p); | |
523 | ||
524 | SEQ_printf(m, "numa_migrations, %ld\n", xchg(&p->numa_pages_migrated, 0)); | |
525 | ||
526 | for_each_online_node(node) { | |
527 | for (i = 0; i < 2; i++) { | |
528 | unsigned long nr_faults = -1; | |
529 | int cpu_current, home_node; | |
530 | ||
ff1df896 RR |
531 | if (p->numa_faults_memory) |
532 | nr_faults = p->numa_faults_memory[2*node + i]; | |
b32e86b4 IM |
533 | |
534 | cpu_current = !i ? (task_node(p) == node) : | |
535 | (pol && node_isset(node, pol->v.nodes)); | |
536 | ||
537 | home_node = (p->numa_preferred_nid == node); | |
538 | ||
ff1df896 | 539 | SEQ_printf(m, "numa_faults_memory, %d, %d, %d, %d, %ld\n", |
b32e86b4 IM |
540 | i, node, cpu_current, home_node, nr_faults); |
541 | } | |
542 | } | |
543 | ||
544 | mpol_put(pol); | |
545 | #endif | |
546 | } | |
547 | ||
43ae34cb IM |
548 | void proc_sched_show_task(struct task_struct *p, struct seq_file *m) |
549 | { | |
cc367732 | 550 | unsigned long nr_switches; |
43ae34cb | 551 | |
fc840914 | 552 | SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr(p), |
5089a976 | 553 | get_nr_threads(p)); |
2d92f227 | 554 | SEQ_printf(m, |
add332a1 KB |
555 | "---------------------------------------------------------" |
556 | "----------\n"); | |
cc367732 | 557 | #define __P(F) \ |
add332a1 | 558 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) |
43ae34cb | 559 | #define P(F) \ |
add332a1 | 560 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) |
cc367732 | 561 | #define __PN(F) \ |
add332a1 | 562 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) |
ef83a571 | 563 | #define PN(F) \ |
add332a1 | 564 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) |
43ae34cb | 565 | |
ef83a571 IM |
566 | PN(se.exec_start); |
567 | PN(se.vruntime); | |
568 | PN(se.sum_exec_runtime); | |
6cfb0d5d | 569 | |
cc367732 IM |
570 | nr_switches = p->nvcsw + p->nivcsw; |
571 | ||
6cfb0d5d | 572 | #ifdef CONFIG_SCHEDSTATS |
41acab88 LDM |
573 | PN(se.statistics.wait_start); |
574 | PN(se.statistics.sleep_start); | |
575 | PN(se.statistics.block_start); | |
576 | PN(se.statistics.sleep_max); | |
577 | PN(se.statistics.block_max); | |
578 | PN(se.statistics.exec_max); | |
579 | PN(se.statistics.slice_max); | |
580 | PN(se.statistics.wait_max); | |
581 | PN(se.statistics.wait_sum); | |
582 | P(se.statistics.wait_count); | |
583 | PN(se.statistics.iowait_sum); | |
584 | P(se.statistics.iowait_count); | |
cc367732 | 585 | P(se.nr_migrations); |
41acab88 LDM |
586 | P(se.statistics.nr_migrations_cold); |
587 | P(se.statistics.nr_failed_migrations_affine); | |
588 | P(se.statistics.nr_failed_migrations_running); | |
589 | P(se.statistics.nr_failed_migrations_hot); | |
590 | P(se.statistics.nr_forced_migrations); | |
591 | P(se.statistics.nr_wakeups); | |
592 | P(se.statistics.nr_wakeups_sync); | |
593 | P(se.statistics.nr_wakeups_migrate); | |
594 | P(se.statistics.nr_wakeups_local); | |
595 | P(se.statistics.nr_wakeups_remote); | |
596 | P(se.statistics.nr_wakeups_affine); | |
597 | P(se.statistics.nr_wakeups_affine_attempts); | |
598 | P(se.statistics.nr_wakeups_passive); | |
599 | P(se.statistics.nr_wakeups_idle); | |
cc367732 IM |
600 | |
601 | { | |
602 | u64 avg_atom, avg_per_cpu; | |
603 | ||
604 | avg_atom = p->se.sum_exec_runtime; | |
605 | if (nr_switches) | |
b0ab99e7 | 606 | avg_atom = div64_ul(avg_atom, nr_switches); |
cc367732 IM |
607 | else |
608 | avg_atom = -1LL; | |
609 | ||
610 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 611 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
612 | avg_per_cpu = div64_u64(avg_per_cpu, |
613 | p->se.nr_migrations); | |
c1a89740 | 614 | } else { |
cc367732 | 615 | avg_per_cpu = -1LL; |
c1a89740 | 616 | } |
cc367732 IM |
617 | |
618 | __PN(avg_atom); | |
619 | __PN(avg_per_cpu); | |
620 | } | |
6cfb0d5d | 621 | #endif |
cc367732 | 622 | __P(nr_switches); |
add332a1 | 623 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 | 624 | "nr_voluntary_switches", (long long)p->nvcsw); |
add332a1 | 625 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 IM |
626 | "nr_involuntary_switches", (long long)p->nivcsw); |
627 | ||
43ae34cb | 628 | P(se.load.weight); |
333bb864 | 629 | #ifdef CONFIG_SMP |
939fd731 KB |
630 | P(se.avg.runnable_avg_sum); |
631 | P(se.avg.runnable_avg_period); | |
632 | P(se.avg.load_avg_contrib); | |
633 | P(se.avg.decay_count); | |
634 | #endif | |
43ae34cb IM |
635 | P(policy); |
636 | P(prio); | |
ef83a571 | 637 | #undef PN |
cc367732 IM |
638 | #undef __PN |
639 | #undef P | |
640 | #undef __P | |
43ae34cb IM |
641 | |
642 | { | |
29d7b90c | 643 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
644 | u64 t0, t1; |
645 | ||
29d7b90c IM |
646 | t0 = cpu_clock(this_cpu); |
647 | t1 = cpu_clock(this_cpu); | |
add332a1 | 648 | SEQ_printf(m, "%-45s:%21Ld\n", |
43ae34cb IM |
649 | "clock-delta", (long long)(t1-t0)); |
650 | } | |
b32e86b4 IM |
651 | |
652 | sched_show_numa(p, m); | |
43ae34cb IM |
653 | } |
654 | ||
655 | void proc_sched_set_task(struct task_struct *p) | |
656 | { | |
6cfb0d5d | 657 | #ifdef CONFIG_SCHEDSTATS |
41acab88 | 658 | memset(&p->se.statistics, 0, sizeof(p->se.statistics)); |
6cfb0d5d | 659 | #endif |
43ae34cb | 660 | } |