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 | ||
cd126afe | 71 | if (!se) |
18bf2805 | 72 | return; |
18bf2805 | 73 | |
ff9b48c3 BR |
74 | PN(se->exec_start); |
75 | PN(se->vruntime); | |
76 | PN(se->sum_exec_runtime); | |
77 | #ifdef CONFIG_SCHEDSTATS | |
cb251765 MG |
78 | if (schedstat_enabled()) { |
79 | PN(se->statistics.wait_start); | |
80 | PN(se->statistics.sleep_start); | |
81 | PN(se->statistics.block_start); | |
82 | PN(se->statistics.sleep_max); | |
83 | PN(se->statistics.block_max); | |
84 | PN(se->statistics.exec_max); | |
85 | PN(se->statistics.slice_max); | |
86 | PN(se->statistics.wait_max); | |
87 | PN(se->statistics.wait_sum); | |
88 | P(se->statistics.wait_count); | |
89 | } | |
ff9b48c3 BR |
90 | #endif |
91 | P(se->load.weight); | |
9d85f21c | 92 | #ifdef CONFIG_SMP |
9d89c257 YD |
93 | P(se->avg.load_avg); |
94 | P(se->avg.util_avg); | |
9d85f21c | 95 | #endif |
ff9b48c3 BR |
96 | #undef PN |
97 | #undef P | |
98 | } | |
99 | #endif | |
100 | ||
efe25c2c BR |
101 | #ifdef CONFIG_CGROUP_SCHED |
102 | static char group_path[PATH_MAX]; | |
103 | ||
104 | static char *task_group_path(struct task_group *tg) | |
105 | { | |
8ecedd7a BR |
106 | if (autogroup_path(tg, group_path, PATH_MAX)) |
107 | return group_path; | |
108 | ||
e61734c5 | 109 | return cgroup_path(tg->css.cgroup, group_path, PATH_MAX); |
efe25c2c BR |
110 | } |
111 | #endif | |
112 | ||
43ae34cb | 113 | static void |
a48da48b | 114 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) |
43ae34cb IM |
115 | { |
116 | if (rq->curr == p) | |
117 | SEQ_printf(m, "R"); | |
118 | else | |
119 | SEQ_printf(m, " "); | |
120 | ||
ef83a571 | 121 | SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ", |
fc840914 | 122 | p->comm, task_pid_nr(p), |
ef83a571 | 123 | SPLIT_NS(p->se.vruntime), |
43ae34cb | 124 | (long long)(p->nvcsw + p->nivcsw), |
6f605d83 | 125 | p->prio); |
6cfb0d5d | 126 | #ifdef CONFIG_SCHEDSTATS |
cb251765 MG |
127 | if (schedstat_enabled()) { |
128 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", | |
129 | SPLIT_NS(p->se.statistics.wait_sum), | |
130 | SPLIT_NS(p->se.sum_exec_runtime), | |
131 | SPLIT_NS(p->se.statistics.sum_sleep_runtime)); | |
132 | } | |
6cfb0d5d | 133 | #else |
33d6176e SD |
134 | SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld", |
135 | 0LL, 0L, | |
136 | SPLIT_NS(p->se.sum_exec_runtime), | |
137 | 0LL, 0L); | |
6cfb0d5d | 138 | #endif |
b32e86b4 | 139 | #ifdef CONFIG_NUMA_BALANCING |
e3d24d0a | 140 | SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); |
b32e86b4 | 141 | #endif |
efe25c2c BR |
142 | #ifdef CONFIG_CGROUP_SCHED |
143 | SEQ_printf(m, " %s", task_group_path(task_group(p))); | |
144 | #endif | |
d19ca308 | 145 | |
d19ca308 | 146 | SEQ_printf(m, "\n"); |
43ae34cb IM |
147 | } |
148 | ||
a48da48b | 149 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) |
43ae34cb IM |
150 | { |
151 | struct task_struct *g, *p; | |
152 | ||
153 | SEQ_printf(m, | |
154 | "\nrunnable tasks:\n" | |
c86da3a3 | 155 | " task PID tree-key switches prio" |
c5f3ab1c | 156 | " wait-time sum-exec sum-sleep\n" |
1a75b94f | 157 | "------------------------------------------------------" |
c86da3a3 | 158 | "----------------------------------------------------\n"); |
43ae34cb | 159 | |
5bd96ab6 | 160 | rcu_read_lock(); |
d38e83c7 | 161 | for_each_process_thread(g, p) { |
b32e86b4 | 162 | if (task_cpu(p) != rq_cpu) |
43ae34cb IM |
163 | continue; |
164 | ||
a48da48b | 165 | print_task(m, rq, p); |
d38e83c7 | 166 | } |
5bd96ab6 | 167 | rcu_read_unlock(); |
43ae34cb IM |
168 | } |
169 | ||
5cef9eca | 170 | void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb | 171 | { |
86d9560c IM |
172 | s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, |
173 | spread, rq0_min_vruntime, spread0; | |
348ec61e | 174 | struct rq *rq = cpu_rq(cpu); |
67e12eac IM |
175 | struct sched_entity *last; |
176 | unsigned long flags; | |
177 | ||
efe25c2c BR |
178 | #ifdef CONFIG_FAIR_GROUP_SCHED |
179 | SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); | |
180 | #else | |
ada18de2 | 181 | SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); |
efe25c2c | 182 | #endif |
ef83a571 IM |
183 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", |
184 | SPLIT_NS(cfs_rq->exec_clock)); | |
67e12eac | 185 | |
05fa785c | 186 | raw_spin_lock_irqsave(&rq->lock, flags); |
67e12eac | 187 | if (cfs_rq->rb_leftmost) |
ac53db59 | 188 | MIN_vruntime = (__pick_first_entity(cfs_rq))->vruntime; |
67e12eac IM |
189 | last = __pick_last_entity(cfs_rq); |
190 | if (last) | |
191 | max_vruntime = last->vruntime; | |
5ac5c4d6 | 192 | min_vruntime = cfs_rq->min_vruntime; |
348ec61e | 193 | rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime; |
05fa785c | 194 | raw_spin_unlock_irqrestore(&rq->lock, flags); |
ef83a571 IM |
195 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime", |
196 | SPLIT_NS(MIN_vruntime)); | |
197 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", | |
198 | SPLIT_NS(min_vruntime)); | |
199 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime", | |
200 | SPLIT_NS(max_vruntime)); | |
67e12eac | 201 | spread = max_vruntime - MIN_vruntime; |
ef83a571 IM |
202 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread", |
203 | SPLIT_NS(spread)); | |
86d9560c | 204 | spread0 = min_vruntime - rq0_min_vruntime; |
ef83a571 IM |
205 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0", |
206 | SPLIT_NS(spread0)); | |
5ac5c4d6 | 207 | SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", |
ddc97297 | 208 | cfs_rq->nr_spread_over); |
c82513e5 | 209 | SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); |
2069dd75 | 210 | SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); |
c09595f6 | 211 | #ifdef CONFIG_SMP |
9d89c257 YD |
212 | SEQ_printf(m, " .%-30s: %lu\n", "load_avg", |
213 | cfs_rq->avg.load_avg); | |
13962234 YD |
214 | SEQ_printf(m, " .%-30s: %lu\n", "runnable_load_avg", |
215 | cfs_rq->runnable_load_avg); | |
9d89c257 YD |
216 | SEQ_printf(m, " .%-30s: %lu\n", "util_avg", |
217 | cfs_rq->avg.util_avg); | |
218 | SEQ_printf(m, " .%-30s: %ld\n", "removed_load_avg", | |
219 | atomic_long_read(&cfs_rq->removed_load_avg)); | |
220 | SEQ_printf(m, " .%-30s: %ld\n", "removed_util_avg", | |
221 | atomic_long_read(&cfs_rq->removed_util_avg)); | |
333bb864 | 222 | #ifdef CONFIG_FAIR_GROUP_SCHED |
9d89c257 YD |
223 | SEQ_printf(m, " .%-30s: %lu\n", "tg_load_avg_contrib", |
224 | cfs_rq->tg_load_avg_contrib); | |
333bb864 AS |
225 | SEQ_printf(m, " .%-30s: %ld\n", "tg_load_avg", |
226 | atomic_long_read(&cfs_rq->tg->load_avg)); | |
c09595f6 | 227 | #endif |
333bb864 | 228 | #endif |
f9f9ffc2 | 229 | #ifdef CONFIG_CFS_BANDWIDTH |
f9f9ffc2 BS |
230 | SEQ_printf(m, " .%-30s: %d\n", "throttled", |
231 | cfs_rq->throttled); | |
232 | SEQ_printf(m, " .%-30s: %d\n", "throttle_count", | |
233 | cfs_rq->throttle_count); | |
234 | #endif | |
2069dd75 | 235 | |
333bb864 | 236 | #ifdef CONFIG_FAIR_GROUP_SCHED |
ff9b48c3 | 237 | print_cfs_group_stats(m, cpu, cfs_rq->tg); |
c09595f6 | 238 | #endif |
43ae34cb IM |
239 | } |
240 | ||
ada18de2 PZ |
241 | void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) |
242 | { | |
efe25c2c BR |
243 | #ifdef CONFIG_RT_GROUP_SCHED |
244 | SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); | |
245 | #else | |
ada18de2 | 246 | SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); |
efe25c2c | 247 | #endif |
ada18de2 PZ |
248 | |
249 | #define P(x) \ | |
250 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) | |
251 | #define PN(x) \ | |
252 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x)) | |
253 | ||
254 | P(rt_nr_running); | |
255 | P(rt_throttled); | |
256 | PN(rt_time); | |
257 | PN(rt_runtime); | |
258 | ||
259 | #undef PN | |
260 | #undef P | |
261 | } | |
262 | ||
acb32132 WL |
263 | void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq) |
264 | { | |
265 | SEQ_printf(m, "\ndl_rq[%d]:\n", cpu); | |
266 | SEQ_printf(m, " .%-30s: %ld\n", "dl_nr_running", dl_rq->dl_nr_running); | |
267 | } | |
268 | ||
5bb6b1ea PZ |
269 | extern __read_mostly int sched_clock_running; |
270 | ||
a48da48b | 271 | static void print_cpu(struct seq_file *m, int cpu) |
43ae34cb | 272 | { |
348ec61e | 273 | struct rq *rq = cpu_rq(cpu); |
efe25c2c | 274 | unsigned long flags; |
43ae34cb IM |
275 | |
276 | #ifdef CONFIG_X86 | |
277 | { | |
278 | unsigned int freq = cpu_khz ? : 1; | |
279 | ||
bbbfeac9 | 280 | SEQ_printf(m, "cpu#%d, %u.%03u MHz\n", |
43ae34cb IM |
281 | cpu, freq / 1000, (freq % 1000)); |
282 | } | |
283 | #else | |
bbbfeac9 | 284 | SEQ_printf(m, "cpu#%d\n", cpu); |
43ae34cb IM |
285 | #endif |
286 | ||
13e099d2 PZ |
287 | #define P(x) \ |
288 | do { \ | |
289 | if (sizeof(rq->x) == 4) \ | |
290 | SEQ_printf(m, " .%-30s: %ld\n", #x, (long)(rq->x)); \ | |
291 | else \ | |
292 | SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x));\ | |
293 | } while (0) | |
294 | ||
ef83a571 IM |
295 | #define PN(x) \ |
296 | SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x)) | |
43ae34cb IM |
297 | |
298 | P(nr_running); | |
299 | SEQ_printf(m, " .%-30s: %lu\n", "load", | |
495eca49 | 300 | rq->load.weight); |
43ae34cb IM |
301 | P(nr_switches); |
302 | P(nr_load_updates); | |
303 | P(nr_uninterruptible); | |
ef83a571 | 304 | PN(next_balance); |
fc840914 | 305 | SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr))); |
ef83a571 | 306 | PN(clock); |
5a537597 | 307 | PN(clock_task); |
43ae34cb IM |
308 | P(cpu_load[0]); |
309 | P(cpu_load[1]); | |
310 | P(cpu_load[2]); | |
311 | P(cpu_load[3]); | |
312 | P(cpu_load[4]); | |
313 | #undef P | |
ef83a571 | 314 | #undef PN |
43ae34cb | 315 | |
5ac5c4d6 PZ |
316 | #ifdef CONFIG_SCHEDSTATS |
317 | #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n); | |
1b9508f6 | 318 | #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n); |
5ac5c4d6 | 319 | |
1b9508f6 MG |
320 | #ifdef CONFIG_SMP |
321 | P64(avg_idle); | |
37e6bae8 | 322 | P64(max_idle_balance_cost); |
1b9508f6 | 323 | #endif |
5ac5c4d6 | 324 | |
cb251765 MG |
325 | if (schedstat_enabled()) { |
326 | P(yld_count); | |
327 | P(sched_count); | |
328 | P(sched_goidle); | |
329 | P(ttwu_count); | |
330 | P(ttwu_local); | |
331 | } | |
5ac5c4d6 | 332 | |
5ac5c4d6 | 333 | #undef P |
fce20979 | 334 | #undef P64 |
5ac5c4d6 | 335 | #endif |
efe25c2c | 336 | spin_lock_irqsave(&sched_debug_lock, flags); |
5cef9eca | 337 | print_cfs_stats(m, cpu); |
ada18de2 | 338 | print_rt_stats(m, cpu); |
acb32132 | 339 | print_dl_stats(m, cpu); |
43ae34cb | 340 | |
a48da48b | 341 | print_rq(m, rq, cpu); |
efe25c2c | 342 | spin_unlock_irqrestore(&sched_debug_lock, flags); |
bbbfeac9 | 343 | SEQ_printf(m, "\n"); |
43ae34cb IM |
344 | } |
345 | ||
1983a922 CE |
346 | static const char *sched_tunable_scaling_names[] = { |
347 | "none", | |
348 | "logaritmic", | |
349 | "linear" | |
350 | }; | |
351 | ||
bbbfeac9 | 352 | static void sched_debug_header(struct seq_file *m) |
43ae34cb | 353 | { |
5bb6b1ea PZ |
354 | u64 ktime, sched_clk, cpu_clk; |
355 | unsigned long flags; | |
43ae34cb | 356 | |
5bb6b1ea PZ |
357 | local_irq_save(flags); |
358 | ktime = ktime_to_ns(ktime_get()); | |
359 | sched_clk = sched_clock(); | |
360 | cpu_clk = local_clock(); | |
361 | local_irq_restore(flags); | |
362 | ||
b32e86b4 | 363 | SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n", |
43ae34cb IM |
364 | init_utsname()->release, |
365 | (int)strcspn(init_utsname()->version, " "), | |
366 | init_utsname()->version); | |
367 | ||
5bb6b1ea PZ |
368 | #define P(x) \ |
369 | SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x)) | |
370 | #define PN(x) \ | |
371 | SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) | |
372 | PN(ktime); | |
373 | PN(sched_clk); | |
374 | PN(cpu_clk); | |
375 | P(jiffies); | |
376 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
35af99e6 | 377 | P(sched_clock_stable()); |
5bb6b1ea PZ |
378 | #endif |
379 | #undef PN | |
380 | #undef P | |
381 | ||
382 | SEQ_printf(m, "\n"); | |
383 | SEQ_printf(m, "sysctl_sched\n"); | |
43ae34cb | 384 | |
1aa4731e | 385 | #define P(x) \ |
d822cece | 386 | SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x)) |
1aa4731e | 387 | #define PN(x) \ |
d822cece | 388 | SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x)) |
1aa4731e | 389 | PN(sysctl_sched_latency); |
b2be5e96 | 390 | PN(sysctl_sched_min_granularity); |
1aa4731e | 391 | PN(sysctl_sched_wakeup_granularity); |
eebef746 | 392 | P(sysctl_sched_child_runs_first); |
1aa4731e IM |
393 | P(sysctl_sched_features); |
394 | #undef PN | |
395 | #undef P | |
396 | ||
bbbfeac9 NZ |
397 | SEQ_printf(m, " .%-40s: %d (%s)\n", |
398 | "sysctl_sched_tunable_scaling", | |
1983a922 CE |
399 | sysctl_sched_tunable_scaling, |
400 | sched_tunable_scaling_names[sysctl_sched_tunable_scaling]); | |
bbbfeac9 NZ |
401 | SEQ_printf(m, "\n"); |
402 | } | |
1983a922 | 403 | |
bbbfeac9 NZ |
404 | static int sched_debug_show(struct seq_file *m, void *v) |
405 | { | |
406 | int cpu = (unsigned long)(v - 2); | |
43ae34cb | 407 | |
bbbfeac9 NZ |
408 | if (cpu != -1) |
409 | print_cpu(m, cpu); | |
410 | else | |
411 | sched_debug_header(m); | |
43ae34cb IM |
412 | |
413 | return 0; | |
414 | } | |
415 | ||
029632fb | 416 | void sysrq_sched_debug_show(void) |
43ae34cb | 417 | { |
bbbfeac9 NZ |
418 | int cpu; |
419 | ||
420 | sched_debug_header(NULL); | |
421 | for_each_online_cpu(cpu) | |
422 | print_cpu(NULL, cpu); | |
423 | ||
424 | } | |
425 | ||
426 | /* | |
427 | * This itererator needs some explanation. | |
428 | * It returns 1 for the header position. | |
429 | * This means 2 is cpu 0. | |
430 | * In a hotplugged system some cpus, including cpu 0, may be missing so we have | |
431 | * to use cpumask_* to iterate over the cpus. | |
432 | */ | |
433 | static void *sched_debug_start(struct seq_file *file, loff_t *offset) | |
434 | { | |
435 | unsigned long n = *offset; | |
436 | ||
437 | if (n == 0) | |
438 | return (void *) 1; | |
439 | ||
440 | n--; | |
441 | ||
442 | if (n > 0) | |
443 | n = cpumask_next(n - 1, cpu_online_mask); | |
444 | else | |
445 | n = cpumask_first(cpu_online_mask); | |
446 | ||
447 | *offset = n + 1; | |
448 | ||
449 | if (n < nr_cpu_ids) | |
450 | return (void *)(unsigned long)(n + 2); | |
451 | return NULL; | |
452 | } | |
453 | ||
454 | static void *sched_debug_next(struct seq_file *file, void *data, loff_t *offset) | |
455 | { | |
456 | (*offset)++; | |
457 | return sched_debug_start(file, offset); | |
458 | } | |
459 | ||
460 | static void sched_debug_stop(struct seq_file *file, void *data) | |
461 | { | |
462 | } | |
463 | ||
464 | static const struct seq_operations sched_debug_sops = { | |
465 | .start = sched_debug_start, | |
466 | .next = sched_debug_next, | |
467 | .stop = sched_debug_stop, | |
468 | .show = sched_debug_show, | |
469 | }; | |
470 | ||
471 | static int sched_debug_release(struct inode *inode, struct file *file) | |
472 | { | |
473 | seq_release(inode, file); | |
474 | ||
475 | return 0; | |
43ae34cb IM |
476 | } |
477 | ||
478 | static int sched_debug_open(struct inode *inode, struct file *filp) | |
479 | { | |
bbbfeac9 NZ |
480 | int ret = 0; |
481 | ||
482 | ret = seq_open(filp, &sched_debug_sops); | |
483 | ||
484 | return ret; | |
43ae34cb IM |
485 | } |
486 | ||
0dbee3a6 | 487 | static const struct file_operations sched_debug_fops = { |
43ae34cb IM |
488 | .open = sched_debug_open, |
489 | .read = seq_read, | |
490 | .llseek = seq_lseek, | |
bbbfeac9 | 491 | .release = sched_debug_release, |
43ae34cb IM |
492 | }; |
493 | ||
494 | static int __init init_sched_debug_procfs(void) | |
495 | { | |
496 | struct proc_dir_entry *pe; | |
497 | ||
a9cf4ddb | 498 | pe = proc_create("sched_debug", 0444, NULL, &sched_debug_fops); |
43ae34cb IM |
499 | if (!pe) |
500 | return -ENOMEM; | |
43ae34cb IM |
501 | return 0; |
502 | } | |
503 | ||
504 | __initcall(init_sched_debug_procfs); | |
505 | ||
b32e86b4 IM |
506 | #define __P(F) \ |
507 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F) | |
508 | #define P(F) \ | |
509 | SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F) | |
510 | #define __PN(F) \ | |
511 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F)) | |
512 | #define PN(F) \ | |
513 | SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F)) | |
514 | ||
515 | ||
397f2378 SD |
516 | #ifdef CONFIG_NUMA_BALANCING |
517 | void print_numa_stats(struct seq_file *m, int node, unsigned long tsf, | |
518 | unsigned long tpf, unsigned long gsf, unsigned long gpf) | |
519 | { | |
520 | SEQ_printf(m, "numa_faults node=%d ", node); | |
521 | SEQ_printf(m, "task_private=%lu task_shared=%lu ", tsf, tpf); | |
522 | SEQ_printf(m, "group_private=%lu group_shared=%lu\n", gsf, gpf); | |
523 | } | |
524 | #endif | |
525 | ||
526 | ||
b32e86b4 IM |
527 | static void sched_show_numa(struct task_struct *p, struct seq_file *m) |
528 | { | |
529 | #ifdef CONFIG_NUMA_BALANCING | |
530 | struct mempolicy *pol; | |
b32e86b4 IM |
531 | |
532 | if (p->mm) | |
533 | P(mm->numa_scan_seq); | |
534 | ||
535 | task_lock(p); | |
536 | pol = p->mempolicy; | |
537 | if (pol && !(pol->flags & MPOL_F_MORON)) | |
538 | pol = NULL; | |
539 | mpol_get(pol); | |
540 | task_unlock(p); | |
541 | ||
397f2378 SD |
542 | P(numa_pages_migrated); |
543 | P(numa_preferred_nid); | |
544 | P(total_numa_faults); | |
545 | SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", | |
546 | task_node(p), task_numa_group_id(p)); | |
547 | show_numa_stats(p, m); | |
b32e86b4 IM |
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 |
cc367732 | 577 | P(se.nr_migrations); |
cc367732 | 578 | |
cb251765 | 579 | if (schedstat_enabled()) { |
cc367732 IM |
580 | u64 avg_atom, avg_per_cpu; |
581 | ||
cb251765 MG |
582 | PN(se.statistics.sum_sleep_runtime); |
583 | PN(se.statistics.wait_start); | |
584 | PN(se.statistics.sleep_start); | |
585 | PN(se.statistics.block_start); | |
586 | PN(se.statistics.sleep_max); | |
587 | PN(se.statistics.block_max); | |
588 | PN(se.statistics.exec_max); | |
589 | PN(se.statistics.slice_max); | |
590 | PN(se.statistics.wait_max); | |
591 | PN(se.statistics.wait_sum); | |
592 | P(se.statistics.wait_count); | |
593 | PN(se.statistics.iowait_sum); | |
594 | P(se.statistics.iowait_count); | |
595 | P(se.statistics.nr_migrations_cold); | |
596 | P(se.statistics.nr_failed_migrations_affine); | |
597 | P(se.statistics.nr_failed_migrations_running); | |
598 | P(se.statistics.nr_failed_migrations_hot); | |
599 | P(se.statistics.nr_forced_migrations); | |
600 | P(se.statistics.nr_wakeups); | |
601 | P(se.statistics.nr_wakeups_sync); | |
602 | P(se.statistics.nr_wakeups_migrate); | |
603 | P(se.statistics.nr_wakeups_local); | |
604 | P(se.statistics.nr_wakeups_remote); | |
605 | P(se.statistics.nr_wakeups_affine); | |
606 | P(se.statistics.nr_wakeups_affine_attempts); | |
607 | P(se.statistics.nr_wakeups_passive); | |
608 | P(se.statistics.nr_wakeups_idle); | |
609 | ||
cc367732 IM |
610 | avg_atom = p->se.sum_exec_runtime; |
611 | if (nr_switches) | |
b0ab99e7 | 612 | avg_atom = div64_ul(avg_atom, nr_switches); |
cc367732 IM |
613 | else |
614 | avg_atom = -1LL; | |
615 | ||
616 | avg_per_cpu = p->se.sum_exec_runtime; | |
c1a89740 | 617 | if (p->se.nr_migrations) { |
6f6d6a1a RZ |
618 | avg_per_cpu = div64_u64(avg_per_cpu, |
619 | p->se.nr_migrations); | |
c1a89740 | 620 | } else { |
cc367732 | 621 | avg_per_cpu = -1LL; |
c1a89740 | 622 | } |
cc367732 IM |
623 | |
624 | __PN(avg_atom); | |
625 | __PN(avg_per_cpu); | |
626 | } | |
6cfb0d5d | 627 | #endif |
cc367732 | 628 | __P(nr_switches); |
add332a1 | 629 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 | 630 | "nr_voluntary_switches", (long long)p->nvcsw); |
add332a1 | 631 | SEQ_printf(m, "%-45s:%21Ld\n", |
cc367732 IM |
632 | "nr_involuntary_switches", (long long)p->nivcsw); |
633 | ||
43ae34cb | 634 | P(se.load.weight); |
333bb864 | 635 | #ifdef CONFIG_SMP |
9d89c257 YD |
636 | P(se.avg.load_sum); |
637 | P(se.avg.util_sum); | |
638 | P(se.avg.load_avg); | |
639 | P(se.avg.util_avg); | |
640 | P(se.avg.last_update_time); | |
939fd731 | 641 | #endif |
43ae34cb IM |
642 | P(policy); |
643 | P(prio); | |
ef83a571 | 644 | #undef PN |
cc367732 IM |
645 | #undef __PN |
646 | #undef P | |
647 | #undef __P | |
43ae34cb IM |
648 | |
649 | { | |
29d7b90c | 650 | unsigned int this_cpu = raw_smp_processor_id(); |
43ae34cb IM |
651 | u64 t0, t1; |
652 | ||
29d7b90c IM |
653 | t0 = cpu_clock(this_cpu); |
654 | t1 = cpu_clock(this_cpu); | |
add332a1 | 655 | SEQ_printf(m, "%-45s:%21Ld\n", |
43ae34cb IM |
656 | "clock-delta", (long long)(t1-t0)); |
657 | } | |
b32e86b4 IM |
658 | |
659 | sched_show_numa(p, m); | |
43ae34cb IM |
660 | } |
661 | ||
662 | void proc_sched_set_task(struct task_struct *p) | |
663 | { | |
6cfb0d5d | 664 | #ifdef CONFIG_SCHEDSTATS |
41acab88 | 665 | memset(&p->se.statistics, 0, sizeof(p->se.statistics)); |
6cfb0d5d | 666 | #endif |
43ae34cb | 667 | } |