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