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>
13struct task_struct;
14
15#ifdef CONFIG_LATENCYTOP
16
17#define LT_SAVECOUNT		32
18#define LT_BACKTRACEDEPTH	12
19
20struct latency_record {
21	unsigned long	backtrace[LT_BACKTRACEDEPTH];
22	unsigned int	count;
23	unsigned long	time;
24	unsigned long	max;
25};
26
27
28
29extern int latencytop_enabled;
30void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
31static inline void
32account_scheduler_latency(struct task_struct *task, int usecs, int inter)
33{
34	if (unlikely(latencytop_enabled))
35		__account_scheduler_latency(task, usecs, inter);
36}
37
38void clear_all_latency_tracing(struct task_struct *p);
 
 
 
39
40#else
41
42static inline void
43account_scheduler_latency(struct task_struct *task, int usecs, int inter)
44{
45}
46
47static inline void clear_all_latency_tracing(struct task_struct *p)
48{
49}
50
51#endif
52
53#endif