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

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