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#ifndef _LINUX_DELAYACCT_H#define _LINUX_DELAYACCT_H
#include <uapi/linux/taskstats.h>
#ifdef CONFIG_TASK_DELAY_ACCTstruct 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_max; u64 blkio_delay_min; u64 blkio_delay; /* wait for sync block io completion */ u64 swapin_start; u64 swapin_delay_max; u64 swapin_delay_min; 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_max; u64 freepages_delay_min; u64 freepages_delay; /* wait for memory reclaim */
u64 thrashing_start; u64 thrashing_delay_max; u64 thrashing_delay_min; u64 thrashing_delay; /* wait for thrashing page */
u64 compact_start; u64 compact_delay_max; u64 compact_delay_min; u64 compact_delay; /* wait for memory compact */
u64 wpcopy_start; u64 wpcopy_delay_max; u64 wpcopy_delay_min; u64 wpcopy_delay; /* wait for write-protect copy */
u64 irq_delay_max; u64 irq_delay_min; u64 irq_delay; /* wait for IRQ/SOFTIRQ */
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 */ u32 irq_count; /* total count of IRQ/SOFTIRQ */
struct timespec64 blkio_delay_max_ts; struct timespec64 swapin_delay_max_ts; struct timespec64 freepages_delay_max_ts; struct timespec64 thrashing_delay_max_ts; struct timespec64 compact_delay_max_ts; struct timespec64 wpcopy_delay_max_ts; struct timespec64 irq_delay_max_ts;};#endif
#include <linux/sched.h>#include <linux/slab.h>#include <linux/jump_label.h>
#ifdef CONFIG_TASK_DELAY_ACCTDECLARE_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);extern void __delayacct_irq(struct task_struct *task, u32 delta);
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();}
static inline void delayacct_irq(struct task_struct *task, u32 delta){ if (!static_branch_unlikely(&delayacct_key)) return;
if (task->delays) __delayacct_irq(task, delta);}
#elsestatic 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){}static inline void delayacct_irq(struct task_struct *task, u32 delta){}
#endif /* CONFIG_TASK_DELAY_ACCT */
#endif