1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * latencytop.h: Infrastructure for displaying 3 * latencytop.h: Infrastructure for displaying latency
4 * 4 *
5 * (C) Copyright 2008 Intel Corporation 5 * (C) Copyright 2008 Intel Corporation
6 * Author: Arjan van de Ven <arjan@linux.intel 6 * Author: Arjan van de Ven <arjan@linux.intel.com>
7 * 7 *
8 */ 8 */
9 9
10 #ifndef _INCLUDE_GUARD_LATENCYTOP_H_ 10 #ifndef _INCLUDE_GUARD_LATENCYTOP_H_
11 #define _INCLUDE_GUARD_LATENCYTOP_H_ 11 #define _INCLUDE_GUARD_LATENCYTOP_H_
12 12
13 #include <linux/compiler.h> 13 #include <linux/compiler.h>
14 struct task_struct; 14 struct task_struct;
15 15
16 #ifdef CONFIG_LATENCYTOP 16 #ifdef CONFIG_LATENCYTOP
17 17
18 #define LT_SAVECOUNT 32 18 #define LT_SAVECOUNT 32
19 #define LT_BACKTRACEDEPTH 12 19 #define LT_BACKTRACEDEPTH 12
20 20
21 struct latency_record { 21 struct latency_record {
22 unsigned long backtrace[LT_BACKTRACE 22 unsigned long backtrace[LT_BACKTRACEDEPTH];
23 unsigned int count; 23 unsigned int count;
24 unsigned long time; 24 unsigned long time;
25 unsigned long max; 25 unsigned long max;
26 }; 26 };
27 27
28 28
29 29
30 extern int latencytop_enabled; 30 extern int latencytop_enabled;
31 void __account_scheduler_latency(struct task_s 31 void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
32 static inline void 32 static inline void
33 account_scheduler_latency(struct task_struct * 33 account_scheduler_latency(struct task_struct *task, int usecs, int inter)
34 { 34 {
35 if (unlikely(latencytop_enabled)) 35 if (unlikely(latencytop_enabled))
36 __account_scheduler_latency(ta 36 __account_scheduler_latency(task, usecs, inter);
37 } 37 }
38 38
39 void clear_tsk_latency_tracing(struct task_str 39 void clear_tsk_latency_tracing(struct task_struct *p);
40 40
>> 41 extern int sysctl_latencytop(struct ctl_table *table, int write,
>> 42 void __user *buffer, size_t *lenp, loff_t *ppos);
>> 43
41 #else 44 #else
42 45
43 static inline void 46 static inline void
44 account_scheduler_latency(struct task_struct * 47 account_scheduler_latency(struct task_struct *task, int usecs, int inter)
45 { 48 {
46 } 49 }
47 50
48 static inline void clear_tsk_latency_tracing(s 51 static inline void clear_tsk_latency_tracing(struct task_struct *p)
49 { 52 {
50 } 53 }
51 54
52 #endif 55 #endif
53 56
54 #endif 57 #endif
55 58
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