260 lines
6.4 KiB
C
260 lines
6.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/* delayacct.h - per-task delay accounting
|
||
|
|
*
|
||
|
|
* Copyright (C) Shailabh Nagar, IBM Corp. 2006
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_DELAYACCT_H
|
||
|
|
#define _LINUX_DELAYACCT_H
|
||
|
|
|
||
|
|
#include <uapi/linux/taskstats.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_TASK_DELAY_ACCT
|
||
|
|
struct task_delay_info {
|
||
|
|
raw_spinlock_t lock;
|
||
|
|
|
||
|
|
/* For each stat XXX, add following, aligned appropriately
|
||
|
|
*
|
||
|
|
* struct timespec XXX_start, XXX_end;
|
||
|
|
* u64 XXX_delay;
|
||
|
|
* u32 XXX_count;
|
||
|
|
*
|
||
|
|
* Atomicity of updates to XXX_delay, XXX_count protected by
|
||
|
|
* single lock above (split into XXX_lock if contention is an issue).
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* XXX_count is incremented on every XXX operation, the delay
|
||
|
|
* associated with the operation is added to XXX_delay.
|
||
|
|
* XXX_delay contains the accumulated delay time in nanoseconds.
|
||
|
|
*/
|
||
|
|
u64 blkio_start;
|
||
|
|
u64 blkio_delay; /* wait for sync block io completion */
|
||
|
|
u64 swapin_start;
|
||
|
|
u64 swapin_delay; /* wait for swapin */
|
||
|
|
u32 blkio_count; /* total count of the number of sync block */
|
||
|
|
/* io operations performed */
|
||
|
|
u32 swapin_count; /* total count of swapin */
|
||
|
|
|
||
|
|
u64 freepages_start;
|
||
|
|
u64 freepages_delay; /* wait for memory reclaim */
|
||
|
|
|
||
|
|
u64 thrashing_start;
|
||
|
|
u64 thrashing_delay; /* wait for thrashing page */
|
||
|
|
|
||
|
|
u64 compact_start;
|
||
|
|
u64 compact_delay; /* wait for memory compact */
|
||
|
|
|
||
|
|
u64 wpcopy_start;
|
||
|
|
u64 wpcopy_delay; /* wait for write-protect copy */
|
||
|
|
|
||
|
|
u32 freepages_count; /* total count of memory reclaim */
|
||
|
|
u32 thrashing_count; /* total count of thrash waits */
|
||
|
|
u32 compact_count; /* total count of memory compact */
|
||
|
|
u32 wpcopy_count; /* total count of write-protect copy */
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/jump_label.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_TASK_DELAY_ACCT
|
||
|
|
DECLARE_STATIC_KEY_FALSE(delayacct_key);
|
||
|
|
extern int delayacct_on; /* Delay accounting turned on/off */
|
||
|
|
extern struct kmem_cache *delayacct_cache;
|
||
|
|
extern void delayacct_init(void);
|
||
|
|
|
||
|
|
extern void __delayacct_tsk_init(struct task_struct *);
|
||
|
|
extern void __delayacct_tsk_exit(struct task_struct *);
|
||
|
|
extern void __delayacct_blkio_start(void);
|
||
|
|
extern void __delayacct_blkio_end(struct task_struct *);
|
||
|
|
extern int delayacct_add_tsk(struct taskstats *, struct task_struct *);
|
||
|
|
extern __u64 __delayacct_blkio_ticks(struct task_struct *);
|
||
|
|
extern void __delayacct_freepages_start(void);
|
||
|
|
extern void __delayacct_freepages_end(void);
|
||
|
|
extern void __delayacct_thrashing_start(bool *in_thrashing);
|
||
|
|
extern void __delayacct_thrashing_end(bool *in_thrashing);
|
||
|
|
extern void __delayacct_swapin_start(void);
|
||
|
|
extern void __delayacct_swapin_end(void);
|
||
|
|
extern void __delayacct_compact_start(void);
|
||
|
|
extern void __delayacct_compact_end(void);
|
||
|
|
extern void __delayacct_wpcopy_start(void);
|
||
|
|
extern void __delayacct_wpcopy_end(void);
|
||
|
|
|
||
|
|
static inline void delayacct_tsk_init(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
/* reinitialize in case parent's non-null pointer was dup'ed*/
|
||
|
|
tsk->delays = NULL;
|
||
|
|
if (delayacct_on)
|
||
|
|
__delayacct_tsk_init(tsk);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Free tsk->delays. Called from bad fork and __put_task_struct
|
||
|
|
* where there's no risk of tsk->delays being accessed elsewhere
|
||
|
|
*/
|
||
|
|
static inline void delayacct_tsk_free(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
if (tsk->delays)
|
||
|
|
kmem_cache_free(delayacct_cache, tsk->delays);
|
||
|
|
tsk->delays = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_blkio_start(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_blkio_start();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_blkio_end(struct task_struct *p)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (p->delays)
|
||
|
|
__delayacct_blkio_end(p);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
if (tsk->delays)
|
||
|
|
return __delayacct_blkio_ticks(tsk);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_freepages_start(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_freepages_start();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_freepages_end(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_freepages_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_thrashing_start(bool *in_thrashing)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_thrashing_start(in_thrashing);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_thrashing_end(bool *in_thrashing)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_thrashing_end(in_thrashing);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_swapin_start(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_swapin_start();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_swapin_end(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_swapin_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_compact_start(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_compact_start();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_compact_end(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_compact_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_wpcopy_start(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_wpcopy_start();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void delayacct_wpcopy_end(void)
|
||
|
|
{
|
||
|
|
if (!static_branch_unlikely(&delayacct_key))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (current->delays)
|
||
|
|
__delayacct_wpcopy_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
static inline void delayacct_init(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_tsk_init(struct task_struct *tsk)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_tsk_free(struct task_struct *tsk)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_blkio_start(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_blkio_end(struct task_struct *p)
|
||
|
|
{}
|
||
|
|
static inline int delayacct_add_tsk(struct taskstats *d,
|
||
|
|
struct task_struct *tsk)
|
||
|
|
{ return 0; }
|
||
|
|
static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk)
|
||
|
|
{ return 0; }
|
||
|
|
static inline int delayacct_is_task_waiting_on_io(struct task_struct *p)
|
||
|
|
{ return 0; }
|
||
|
|
static inline void delayacct_freepages_start(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_freepages_end(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_thrashing_start(bool *in_thrashing)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_thrashing_end(bool *in_thrashing)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_swapin_start(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_swapin_end(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_compact_start(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_compact_end(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_wpcopy_start(void)
|
||
|
|
{}
|
||
|
|
static inline void delayacct_wpcopy_end(void)
|
||
|
|
{}
|
||
|
|
|
||
|
|
#endif /* CONFIG_TASK_DELAY_ACCT */
|
||
|
|
|
||
|
|
#endif
|