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Filename/usr/src/linux-headers-3.13.0-24/include/linux/latencytop.h
Size1.02 kb
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 05:44
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/*
* latencytop.h: Infrastructure for displaying latency
*
* (C) Copyright 2008 Intel Corporation
* Author: Arjan van de Ven <[email protected]>
*
*/

#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);

#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