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c942fddf | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
ca74e92b SN |
2 | /* delayacct.h - per-task delay accounting |
3 | * | |
4 | * Copyright (C) Shailabh Nagar, IBM Corp. 2006 | |
ca74e92b SN |
5 | */ |
6 | ||
7 | #ifndef _LINUX_DELAYACCT_H | |
8 | #define _LINUX_DELAYACCT_H | |
9 | ||
4025819d | 10 | #include <uapi/linux/taskstats.h> |
ca74e92b SN |
11 | |
12 | #ifdef CONFIG_TASK_DELAY_ACCT | |
47913d4e | 13 | struct task_delay_info { |
02acc80d | 14 | raw_spinlock_t lock; |
ca74e92b | 15 | |
47913d4e IM |
16 | /* For each stat XXX, add following, aligned appropriately |
17 | * | |
18 | * struct timespec XXX_start, XXX_end; | |
19 | * u64 XXX_delay; | |
20 | * u32 XXX_count; | |
21 | * | |
22 | * Atomicity of updates to XXX_delay, XXX_count protected by | |
23 | * single lock above (split into XXX_lock if contention is an issue). | |
24 | */ | |
25 | ||
26 | /* | |
27 | * XXX_count is incremented on every XXX operation, the delay | |
28 | * associated with the operation is added to XXX_delay. | |
29 | * XXX_delay contains the accumulated delay time in nanoseconds. | |
30 | */ | |
a3d5dc90 | 31 | u64 blkio_start; |
47913d4e | 32 | u64 blkio_delay; /* wait for sync block io completion */ |
a3d5dc90 YY |
33 | u64 swapin_start; |
34 | u64 swapin_delay; /* wait for swapin */ | |
47913d4e IM |
35 | u32 blkio_count; /* total count of the number of sync block */ |
36 | /* io operations performed */ | |
a3d5dc90 | 37 | u32 swapin_count; /* total count of swapin */ |
47913d4e IM |
38 | |
39 | u64 freepages_start; | |
40 | u64 freepages_delay; /* wait for memory reclaim */ | |
b1d29ba8 JW |
41 | |
42 | u64 thrashing_start; | |
43 | u64 thrashing_delay; /* wait for thrashing page */ | |
44 | ||
5bf18281 | 45 | u64 compact_start; |
46 | u64 compact_delay; /* wait for memory compact */ | |
47 | ||
47913d4e | 48 | u32 freepages_count; /* total count of memory reclaim */ |
b1d29ba8 | 49 | u32 thrashing_count; /* total count of thrash waits */ |
5bf18281 | 50 | u32 compact_count; /* total count of memory compact */ |
47913d4e IM |
51 | }; |
52 | #endif | |
53 | ||
54 | #include <linux/sched.h> | |
55 | #include <linux/slab.h> | |
eee4d9fe | 56 | #include <linux/jump_label.h> |
47913d4e IM |
57 | |
58 | #ifdef CONFIG_TASK_DELAY_ACCT | |
e4042ad4 | 59 | DECLARE_STATIC_KEY_FALSE(delayacct_key); |
ca74e92b | 60 | extern int delayacct_on; /* Delay accounting turned on/off */ |
e18b890b | 61 | extern struct kmem_cache *delayacct_cache; |
ca74e92b | 62 | extern void delayacct_init(void); |
0cd7c741 PZ |
63 | |
64 | extern int sysctl_delayacct(struct ctl_table *table, int write, void *buffer, | |
65 | size_t *lenp, loff_t *ppos); | |
66 | ||
ca74e92b SN |
67 | extern void __delayacct_tsk_init(struct task_struct *); |
68 | extern void __delayacct_tsk_exit(struct task_struct *); | |
0ff92245 | 69 | extern void __delayacct_blkio_start(void); |
c96f5471 | 70 | extern void __delayacct_blkio_end(struct task_struct *); |
e4042ad4 | 71 | extern int delayacct_add_tsk(struct taskstats *, struct task_struct *); |
25890454 | 72 | extern __u64 __delayacct_blkio_ticks(struct task_struct *); |
873b4771 KK |
73 | extern void __delayacct_freepages_start(void); |
74 | extern void __delayacct_freepages_end(void); | |
b1d29ba8 JW |
75 | extern void __delayacct_thrashing_start(void); |
76 | extern void __delayacct_thrashing_end(void); | |
a3d5dc90 YY |
77 | extern void __delayacct_swapin_start(void); |
78 | extern void __delayacct_swapin_end(void); | |
5bf18281 | 79 | extern void __delayacct_compact_start(void); |
80 | extern void __delayacct_compact_end(void); | |
846c7bb0 | 81 | |
ca74e92b SN |
82 | static inline void delayacct_tsk_init(struct task_struct *tsk) |
83 | { | |
84 | /* reinitialize in case parent's non-null pointer was dup'ed*/ | |
85 | tsk->delays = NULL; | |
163ecdff | 86 | if (delayacct_on) |
ca74e92b SN |
87 | __delayacct_tsk_init(tsk); |
88 | } | |
89 | ||
35df17c5 SN |
90 | /* Free tsk->delays. Called from bad fork and __put_task_struct |
91 | * where there's no risk of tsk->delays being accessed elsewhere | |
92 | */ | |
93 | static inline void delayacct_tsk_free(struct task_struct *tsk) | |
ca74e92b SN |
94 | { |
95 | if (tsk->delays) | |
35df17c5 SN |
96 | kmem_cache_free(delayacct_cache, tsk->delays); |
97 | tsk->delays = NULL; | |
ca74e92b SN |
98 | } |
99 | ||
0ff92245 SN |
100 | static inline void delayacct_blkio_start(void) |
101 | { | |
e4042ad4 | 102 | if (!static_branch_unlikely(&delayacct_key)) |
eee4d9fe PZ |
103 | return; |
104 | ||
0ff92245 SN |
105 | if (current->delays) |
106 | __delayacct_blkio_start(); | |
107 | } | |
108 | ||
c96f5471 | 109 | static inline void delayacct_blkio_end(struct task_struct *p) |
0ff92245 | 110 | { |
e4042ad4 | 111 | if (!static_branch_unlikely(&delayacct_key)) |
eee4d9fe PZ |
112 | return; |
113 | ||
b512719f | 114 | if (p->delays) |
c96f5471 | 115 | __delayacct_blkio_end(p); |
0ff92245 SN |
116 | } |
117 | ||
25890454 SN |
118 | static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk) |
119 | { | |
120 | if (tsk->delays) | |
121 | return __delayacct_blkio_ticks(tsk); | |
122 | return 0; | |
123 | } | |
124 | ||
873b4771 KK |
125 | static inline void delayacct_freepages_start(void) |
126 | { | |
82065b72 YY |
127 | if (!static_branch_unlikely(&delayacct_key)) |
128 | return; | |
129 | ||
873b4771 KK |
130 | if (current->delays) |
131 | __delayacct_freepages_start(); | |
132 | } | |
133 | ||
134 | static inline void delayacct_freepages_end(void) | |
135 | { | |
82065b72 YY |
136 | if (!static_branch_unlikely(&delayacct_key)) |
137 | return; | |
138 | ||
873b4771 KK |
139 | if (current->delays) |
140 | __delayacct_freepages_end(); | |
141 | } | |
142 | ||
b1d29ba8 JW |
143 | static inline void delayacct_thrashing_start(void) |
144 | { | |
82065b72 YY |
145 | if (!static_branch_unlikely(&delayacct_key)) |
146 | return; | |
147 | ||
b1d29ba8 JW |
148 | if (current->delays) |
149 | __delayacct_thrashing_start(); | |
150 | } | |
151 | ||
152 | static inline void delayacct_thrashing_end(void) | |
153 | { | |
82065b72 YY |
154 | if (!static_branch_unlikely(&delayacct_key)) |
155 | return; | |
156 | ||
b1d29ba8 JW |
157 | if (current->delays) |
158 | __delayacct_thrashing_end(); | |
159 | } | |
160 | ||
a3d5dc90 YY |
161 | static inline void delayacct_swapin_start(void) |
162 | { | |
82065b72 YY |
163 | if (!static_branch_unlikely(&delayacct_key)) |
164 | return; | |
165 | ||
a3d5dc90 YY |
166 | if (current->delays) |
167 | __delayacct_swapin_start(); | |
168 | } | |
169 | ||
170 | static inline void delayacct_swapin_end(void) | |
171 | { | |
82065b72 YY |
172 | if (!static_branch_unlikely(&delayacct_key)) |
173 | return; | |
174 | ||
a3d5dc90 YY |
175 | if (current->delays) |
176 | __delayacct_swapin_end(); | |
177 | } | |
178 | ||
5bf18281 | 179 | static inline void delayacct_compact_start(void) |
180 | { | |
181 | if (!static_branch_unlikely(&delayacct_key)) | |
182 | return; | |
183 | ||
184 | if (current->delays) | |
185 | __delayacct_compact_start(); | |
186 | } | |
187 | ||
188 | static inline void delayacct_compact_end(void) | |
189 | { | |
190 | if (!static_branch_unlikely(&delayacct_key)) | |
191 | return; | |
192 | ||
193 | if (current->delays) | |
194 | __delayacct_compact_end(); | |
195 | } | |
196 | ||
ca74e92b | 197 | #else |
ca74e92b SN |
198 | static inline void delayacct_init(void) |
199 | {} | |
200 | static inline void delayacct_tsk_init(struct task_struct *tsk) | |
201 | {} | |
35df17c5 | 202 | static inline void delayacct_tsk_free(struct task_struct *tsk) |
ca74e92b | 203 | {} |
0ff92245 SN |
204 | static inline void delayacct_blkio_start(void) |
205 | {} | |
c96f5471 | 206 | static inline void delayacct_blkio_end(struct task_struct *p) |
0ff92245 | 207 | {} |
6f44993f SN |
208 | static inline int delayacct_add_tsk(struct taskstats *d, |
209 | struct task_struct *tsk) | |
210 | { return 0; } | |
25890454 SN |
211 | static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk) |
212 | { return 0; } | |
846c7bb0 BS |
213 | static inline int delayacct_is_task_waiting_on_io(struct task_struct *p) |
214 | { return 0; } | |
873b4771 KK |
215 | static inline void delayacct_freepages_start(void) |
216 | {} | |
217 | static inline void delayacct_freepages_end(void) | |
218 | {} | |
b1d29ba8 JW |
219 | static inline void delayacct_thrashing_start(void) |
220 | {} | |
221 | static inline void delayacct_thrashing_end(void) | |
222 | {} | |
a3d5dc90 YY |
223 | static inline void delayacct_swapin_start(void) |
224 | {} | |
225 | static inline void delayacct_swapin_end(void) | |
226 | {} | |
5bf18281 | 227 | static inline void delayacct_compact_start(void) |
228 | {} | |
229 | static inline void delayacct_compact_end(void) | |
230 | {} | |
873b4771 | 231 | |
ca74e92b SN |
232 | #endif /* CONFIG_TASK_DELAY_ACCT */ |
233 | ||
234 | #endif |