mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 12:09:34 +00:00
9745512ce7
LatencyTOP kernel infrastructure; it measures latencies in the scheduler and tracks it system wide and per process. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
45 lines
804 B
C
45 lines
804 B
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_
|
|
|
|
#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;
|
|
};
|
|
|
|
|
|
struct task_struct;
|
|
|
|
void account_scheduler_latency(struct task_struct *task, int usecs, int 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
|