sched: remove wait_runtime fields and features
[linux-2.6.git] / kernel / sched_debug.c
1 /*
2  * kernel/time/sched_debug.c
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>
18
19 /*
20  * This allows printing both to /proc/sched_debug and
21  * to the console
22  */
23 #define SEQ_printf(m, x...)                     \
24  do {                                           \
25         if (m)                                  \
26                 seq_printf(m, x);               \
27         else                                    \
28                 printk(x);                      \
29  } while (0)
30
31 static void
32 print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
33 {
34         if (rq->curr == p)
35                 SEQ_printf(m, "R");
36         else
37                 SEQ_printf(m, " ");
38
39         SEQ_printf(m, "%15s %5d %15Ld %13Ld %5d ",
40                 p->comm, p->pid,
41                 (long long)p->se.fair_key,
42                 (long long)(p->nvcsw + p->nivcsw),
43                 p->prio);
44 #ifdef CONFIG_SCHEDSTATS
45         SEQ_printf(m, "%15Ld %15Ld %15Ld\n",
46                 (long long)p->se.vruntime,
47                 (long long)p->se.sum_exec_runtime,
48                 (long long)p->se.sum_sleep_runtime);
49 #else
50         SEQ_printf(m, "%15Ld %15Ld %15Ld %15Ld %15Ld\n",
51                 0LL, 0LL, 0LL, 0LL, 0LL);
52 #endif
53 }
54
55 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
56 {
57         struct task_struct *g, *p;
58
59         SEQ_printf(m,
60         "\nrunnable tasks:\n"
61         "            task   PID        tree-key  switches  prio"
62         "    exec-runtime        sum-exec       sum-sleep\n"
63         "------------------------------------------------------------------"
64         "--------------------------------"
65         "------------------------------------------------"
66         "--------------------------------\n");
67
68         read_lock_irq(&tasklist_lock);
69
70         do_each_thread(g, p) {
71                 if (!p->se.on_rq || task_cpu(p) != rq_cpu)
72                         continue;
73
74                 print_task(m, rq, p);
75         } while_each_thread(g, p);
76
77         read_unlock_irq(&tasklist_lock);
78 }
79
80 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
81 {
82         s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
83                 spread, rq0_min_vruntime, spread0;
84         struct rq *rq = &per_cpu(runqueues, cpu);
85         struct sched_entity *last;
86         unsigned long flags;
87
88         SEQ_printf(m, "\ncfs_rq\n");
89
90 #define P(x) \
91         SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(cfs_rq->x))
92
93         P(exec_clock);
94
95         spin_lock_irqsave(&rq->lock, flags);
96         if (cfs_rq->rb_leftmost)
97                 MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
98         last = __pick_last_entity(cfs_rq);
99         if (last)
100                 max_vruntime = last->vruntime;
101         min_vruntime = rq->cfs.min_vruntime;
102         rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
103         spin_unlock_irqrestore(&rq->lock, flags);
104         SEQ_printf(m, "  .%-30s: %Ld\n", "MIN_vruntime",
105                         (long long)MIN_vruntime);
106         SEQ_printf(m, "  .%-30s: %Ld\n", "min_vruntime",
107                         (long long)min_vruntime);
108         SEQ_printf(m, "  .%-30s: %Ld\n", "max_vruntime",
109                         (long long)max_vruntime);
110         spread = max_vruntime - MIN_vruntime;
111         SEQ_printf(m, "  .%-30s: %Ld\n", "spread",
112                         (long long)spread);
113         spread0 = min_vruntime - rq0_min_vruntime;
114         SEQ_printf(m, "  .%-30s: %Ld\n", "spread0",
115                         (long long)spread0);
116 #undef P
117 }
118
119 static void print_cpu(struct seq_file *m, int cpu)
120 {
121         struct rq *rq = &per_cpu(runqueues, cpu);
122
123 #ifdef CONFIG_X86
124         {
125                 unsigned int freq = cpu_khz ? : 1;
126
127                 SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",
128                            cpu, freq / 1000, (freq % 1000));
129         }
130 #else
131         SEQ_printf(m, "\ncpu#%d\n", cpu);
132 #endif
133
134 #define P(x) \
135         SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rq->x))
136
137         P(nr_running);
138         SEQ_printf(m, "  .%-30s: %lu\n", "load",
139                    rq->load.weight);
140         P(nr_switches);
141         P(nr_load_updates);
142         P(nr_uninterruptible);
143         SEQ_printf(m, "  .%-30s: %lu\n", "jiffies", jiffies);
144         P(next_balance);
145         P(curr->pid);
146         P(clock);
147         P(idle_clock);
148         P(prev_clock_raw);
149         P(clock_warps);
150         P(clock_overflows);
151         P(clock_deep_idle_events);
152         P(clock_max_delta);
153         P(cpu_load[0]);
154         P(cpu_load[1]);
155         P(cpu_load[2]);
156         P(cpu_load[3]);
157         P(cpu_load[4]);
158 #undef P
159
160         print_cfs_stats(m, cpu);
161
162         print_rq(m, rq, cpu);
163 }
164
165 static int sched_debug_show(struct seq_file *m, void *v)
166 {
167         u64 now = ktime_to_ns(ktime_get());
168         int cpu;
169
170         SEQ_printf(m, "Sched Debug Version: v0.05-v20, %s %.*s\n",
171                 init_utsname()->release,
172                 (int)strcspn(init_utsname()->version, " "),
173                 init_utsname()->version);
174
175         SEQ_printf(m, "now at %Lu nsecs\n", (unsigned long long)now);
176
177         for_each_online_cpu(cpu)
178                 print_cpu(m, cpu);
179
180         SEQ_printf(m, "\n");
181
182         return 0;
183 }
184
185 static void sysrq_sched_debug_show(void)
186 {
187         sched_debug_show(NULL, NULL);
188 }
189
190 static int sched_debug_open(struct inode *inode, struct file *filp)
191 {
192         return single_open(filp, sched_debug_show, NULL);
193 }
194
195 static struct file_operations sched_debug_fops = {
196         .open           = sched_debug_open,
197         .read           = seq_read,
198         .llseek         = seq_lseek,
199         .release        = single_release,
200 };
201
202 static int __init init_sched_debug_procfs(void)
203 {
204         struct proc_dir_entry *pe;
205
206         pe = create_proc_entry("sched_debug", 0644, NULL);
207         if (!pe)
208                 return -ENOMEM;
209
210         pe->proc_fops = &sched_debug_fops;
211
212         return 0;
213 }
214
215 __initcall(init_sched_debug_procfs);
216
217 void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
218 {
219         unsigned long flags;
220         int num_threads = 1;
221
222         rcu_read_lock();
223         if (lock_task_sighand(p, &flags)) {
224                 num_threads = atomic_read(&p->signal->count);
225                 unlock_task_sighand(p, &flags);
226         }
227         rcu_read_unlock();
228
229         SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
230         SEQ_printf(m, "----------------------------------------------\n");
231 #define P(F) \
232         SEQ_printf(m, "%-25s:%20Ld\n", #F, (long long)p->F)
233
234         P(se.exec_start);
235         P(se.vruntime);
236         P(se.sum_exec_runtime);
237
238 #ifdef CONFIG_SCHEDSTATS
239         P(se.wait_start);
240         P(se.sleep_start);
241         P(se.block_start);
242         P(se.sleep_max);
243         P(se.block_max);
244         P(se.exec_max);
245         P(se.slice_max);
246         P(se.wait_max);
247 #endif
248         SEQ_printf(m, "%-25s:%20Ld\n",
249                    "nr_switches", (long long)(p->nvcsw + p->nivcsw));
250         P(se.load.weight);
251         P(policy);
252         P(prio);
253 #undef P
254
255         {
256                 u64 t0, t1;
257
258                 t0 = sched_clock();
259                 t1 = sched_clock();
260                 SEQ_printf(m, "%-25s:%20Ld\n",
261                            "clock-delta", (long long)(t1-t0));
262         }
263 }
264
265 void proc_sched_set_task(struct task_struct *p)
266 {
267 #ifdef CONFIG_SCHEDSTATS
268         p->se.sleep_max                 = 0;
269         p->se.block_max                 = 0;
270         p->se.exec_max                  = 0;
271         p->se.slice_max                 = 0;
272         p->se.wait_max                  = 0;
273 #endif
274         p->se.sum_exec_runtime          = 0;
275         p->se.prev_sum_exec_runtime     = 0;
276 }