1
2
3#ifdef CONFIG_SCHEDSTATS
4
5
6
7
8static inline void
9rq_sched_info_arrive(struct rq *rq, unsigned long long delta)
10{
11 if (rq) {
12 rq->rq_sched_info.run_delay += delta;
13 rq->rq_sched_info.pcount++;
14 }
15}
16
17
18
19
20static inline void
21rq_sched_info_depart(struct rq *rq, unsigned long long delta)
22{
23 if (rq)
24 rq->rq_cpu_time += delta;
25}
26
27static inline void
28rq_sched_info_dequeued(struct rq *rq, unsigned long long delta)
29{
30 if (rq)
31 rq->rq_sched_info.run_delay += delta;
32}
33#define schedstat_enabled() static_branch_unlikely(&sched_schedstats)
34#define __schedstat_inc(var) do { var++; } while (0)
35#define schedstat_inc(var) do { if (schedstat_enabled()) { var++; } } while (0)
36#define __schedstat_add(var, amt) do { var += (amt); } while (0)
37#define schedstat_add(var, amt) do { if (schedstat_enabled()) { var += (amt); } } while (0)
38#define __schedstat_set(var, val) do { var = (val); } while (0)
39#define schedstat_set(var, val) do { if (schedstat_enabled()) { var = (val); } } while (0)
40#define schedstat_val(var) (var)
41#define schedstat_val_or_zero(var) ((schedstat_enabled()) ? (var) : 0)
42
43#else
44static inline void rq_sched_info_arrive (struct rq *rq, unsigned long long delta) { }
45static inline void rq_sched_info_dequeued(struct rq *rq, unsigned long long delta) { }
46static inline void rq_sched_info_depart (struct rq *rq, unsigned long long delta) { }
47# define schedstat_enabled() 0
48# define __schedstat_inc(var) do { } while (0)
49# define schedstat_inc(var) do { } while (0)
50# define __schedstat_add(var, amt) do { } while (0)
51# define schedstat_add(var, amt) do { } while (0)
52# define __schedstat_set(var, val) do { } while (0)
53# define schedstat_set(var, val) do { } while (0)
54# define schedstat_val(var) 0
55# define schedstat_val_or_zero(var) 0
56#endif
57
58#ifdef CONFIG_PSI
59
60
61
62
63
64
65static inline void psi_enqueue(struct task_struct *p, bool wakeup)
66{
67 int clear = 0, set = TSK_RUNNING;
68
69 if (static_branch_likely(&psi_disabled))
70 return;
71
72 if (!wakeup || p->sched_psi_wake_requeue) {
73 if (p->flags & PF_MEMSTALL)
74 set |= TSK_MEMSTALL;
75 if (p->sched_psi_wake_requeue)
76 p->sched_psi_wake_requeue = 0;
77 } else {
78 if (p->in_iowait)
79 clear |= TSK_IOWAIT;
80 }
81
82 psi_task_change(p, clear, set);
83}
84
85static inline void psi_dequeue(struct task_struct *p, bool sleep)
86{
87 int clear = TSK_RUNNING, set = 0;
88
89 if (static_branch_likely(&psi_disabled))
90 return;
91
92 if (!sleep) {
93 if (p->flags & PF_MEMSTALL)
94 clear |= TSK_MEMSTALL;
95 } else {
96 if (p->in_iowait)
97 set |= TSK_IOWAIT;
98 }
99
100 psi_task_change(p, clear, set);
101}
102
103static inline void psi_ttwu_dequeue(struct task_struct *p)
104{
105 if (static_branch_likely(&psi_disabled))
106 return;
107
108
109
110
111
112 if (unlikely(p->in_iowait || (p->flags & PF_MEMSTALL))) {
113 struct rq_flags rf;
114 struct rq *rq;
115 int clear = 0;
116
117 if (p->in_iowait)
118 clear |= TSK_IOWAIT;
119 if (p->flags & PF_MEMSTALL)
120 clear |= TSK_MEMSTALL;
121
122 rq = __task_rq_lock(p, &rf);
123 psi_task_change(p, clear, 0);
124 p->sched_psi_wake_requeue = 1;
125 __task_rq_unlock(rq, &rf);
126 }
127}
128
129static inline void psi_task_tick(struct rq *rq)
130{
131 if (static_branch_likely(&psi_disabled))
132 return;
133
134 if (unlikely(rq->curr->flags & PF_MEMSTALL))
135 psi_memstall_tick(rq->curr, cpu_of(rq));
136}
137#else
138static inline void psi_enqueue(struct task_struct *p, bool wakeup) {}
139static inline void psi_dequeue(struct task_struct *p, bool sleep) {}
140static inline void psi_ttwu_dequeue(struct task_struct *p) {}
141static inline void psi_task_tick(struct rq *rq) {}
142#endif
143
144#ifdef CONFIG_SCHED_INFO
145static inline void sched_info_reset_dequeued(struct task_struct *t)
146{
147 t->sched_info.last_queued = 0;
148}
149
150
151
152
153
154
155
156static inline void sched_info_dequeued(struct rq *rq, struct task_struct *t)
157{
158 unsigned long long now = rq_clock(rq), delta = 0;
159
160 if (sched_info_on()) {
161 if (t->sched_info.last_queued)
162 delta = now - t->sched_info.last_queued;
163 }
164 sched_info_reset_dequeued(t);
165 t->sched_info.run_delay += delta;
166
167 rq_sched_info_dequeued(rq, delta);
168}
169
170
171
172
173
174
175static void sched_info_arrive(struct rq *rq, struct task_struct *t)
176{
177 unsigned long long now = rq_clock(rq), delta = 0;
178
179 if (t->sched_info.last_queued)
180 delta = now - t->sched_info.last_queued;
181 sched_info_reset_dequeued(t);
182 t->sched_info.run_delay += delta;
183 t->sched_info.last_arrival = now;
184 t->sched_info.pcount++;
185
186 rq_sched_info_arrive(rq, delta);
187}
188
189
190
191
192
193
194static inline void sched_info_queued(struct rq *rq, struct task_struct *t)
195{
196 if (sched_info_on()) {
197 if (!t->sched_info.last_queued)
198 t->sched_info.last_queued = rq_clock(rq);
199 }
200}
201
202
203
204
205
206
207
208
209
210static inline void sched_info_depart(struct rq *rq, struct task_struct *t)
211{
212 unsigned long long delta = rq_clock(rq) - t->sched_info.last_arrival;
213
214 rq_sched_info_depart(rq, delta);
215
216 if (t->state == TASK_RUNNING)
217 sched_info_queued(rq, t);
218}
219
220
221
222
223
224
225static inline void
226__sched_info_switch(struct rq *rq, struct task_struct *prev, struct task_struct *next)
227{
228
229
230
231
232
233 if (prev != rq->idle)
234 sched_info_depart(rq, prev);
235
236 if (next != rq->idle)
237 sched_info_arrive(rq, next);
238}
239
240static inline void
241sched_info_switch(struct rq *rq, struct task_struct *prev, struct task_struct *next)
242{
243 if (sched_info_on())
244 __sched_info_switch(rq, prev, next);
245}
246
247#else
248# define sched_info_queued(rq, t) do { } while (0)
249# define sched_info_reset_dequeued(t) do { } while (0)
250# define sched_info_dequeued(rq, t) do { } while (0)
251# define sched_info_depart(rq, t) do { } while (0)
252# define sched_info_arrive(rq, next) do { } while (0)
253# define sched_info_switch(rq, t, next) do { } while (0)
254#endif
255