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