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/* 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
 
 
 
41#else
42
43static inline void
44account_scheduler_latency(struct task_struct *task, int usecs, int inter)
45{
46}
47
48static inline void clear_tsk_latency_tracing(struct task_struct *p)
49{
50}
51
52#endif
53
54#endif