57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
|
/*
|
||
|
|
* latencytop.h: Infrastructure for displaying latency
|
||
|
|
*
|
||
|
|
* (C) Copyright 2008 Intel Corporation
|
||
|
|
* Author: Arjan van de Ven <arjan@linux.intel.com>
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _INCLUDE_GUARD_LATENCYTOP_H_
|
||
|
|
#define _INCLUDE_GUARD_LATENCYTOP_H_
|
||
|
|
|
||
|
|
#include <linux/compiler.h>
|
||
|
|
struct task_struct;
|
||
|
|
|
||
|
|
#ifdef CONFIG_LATENCYTOP
|
||
|
|
|
||
|
|
#define LT_SAVECOUNT 32
|
||
|
|
#define LT_BACKTRACEDEPTH 12
|
||
|
|
|
||
|
|
struct latency_record {
|
||
|
|
unsigned long backtrace[LT_BACKTRACEDEPTH];
|
||
|
|
unsigned int count;
|
||
|
|
unsigned long time;
|
||
|
|
unsigned long max;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
extern int latencytop_enabled;
|
||
|
|
void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
|
||
|
|
static inline void
|
||
|
|
account_scheduler_latency(struct task_struct *task, int usecs, int inter)
|
||
|
|
{
|
||
|
|
if (unlikely(latencytop_enabled))
|
||
|
|
__account_scheduler_latency(task, usecs, inter);
|
||
|
|
}
|
||
|
|
|
||
|
|
void clear_all_latency_tracing(struct task_struct *p);
|
||
|
|
|
||
|
|
extern int sysctl_latencytop(struct ctl_table *table, int write,
|
||
|
|
void __user *buffer, size_t *lenp, loff_t *ppos);
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
account_scheduler_latency(struct task_struct *task, int usecs, int inter)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void clear_all_latency_tracing(struct task_struct *p)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|