projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 9745512c AV |
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 | ||
| ad0b0fd5 | 13 | #include <linux/compiler.h> |
| 029632fb PZ |
14 | struct task_struct; |
| 15 | ||
| 9745512c AV |
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_BACKTRACEDEPTH]; | |
| 23 | unsigned int count; | |
| 24 | unsigned long time; | |
| 25 | unsigned long max; | |
| 26 | }; | |
| 27 | ||
| 28 | ||
| 9745512c | 29 | |
| ad0b0fd5 AV |
30 | extern int latencytop_enabled; |
| 31 | void __account_scheduler_latency(struct task_struct *task, int usecs, int inter); | |
| 32 | static inline void | |
| 33 | account_scheduler_latency(struct task_struct *task, int usecs, int inter) | |
| 34 | { | |
| 35 | if (unlikely(latencytop_enabled)) | |
| 36 | __account_scheduler_latency(task, usecs, inter); | |
| 37 | } | |
| 9745512c AV |
38 | |
| 39 | void clear_all_latency_tracing(struct task_struct *p); | |
| 40 | ||
| cb251765 MG |
41 | extern int sysctl_latencytop(struct ctl_table *table, int write, |
| 42 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
| 43 | ||
| 9745512c AV |
44 | #else |
| 45 | ||
| 46 | static inline void | |
| 47 | account_scheduler_latency(struct task_struct *task, int usecs, int inter) | |
| 48 | { | |
| 49 | } | |
| 50 | ||
| 51 | static inline void clear_all_latency_tracing(struct task_struct *p) | |
| 52 | { | |
| 53 | } | |
| 54 | ||
| 55 | #endif | |
| 56 | ||
| 57 | #endif |