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