mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
e02c9b0d65
The name clear_all_latency_tracing is misleading, in fact which only clear per task's latency_record[], and we do have another function named clear_global_latency_tracing which clear the global latency_record[] buffer. Link: http://lkml.kernel.org/r/20190226114602.16902-1-linf@wangsu.com Signed-off-by: Lin Feng <linf@wangsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Fabian Frederick <fabf@skynet.be> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* 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_tsk_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_tsk_latency_tracing(struct task_struct *p)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|