[linux.git] / include / linux / profile.h

#ifndef _LINUX_PROFILE_H
#define _LINUX_PROFILE_H

#ifdef __KERNEL__

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/cpumask.h>
#include <linux/cache.h>

#include <asm/errno.h>

extern int prof_on __read_mostly;

#define CPU_PROFILING	1
#define SCHED_PROFILING	2
#define SLEEP_PROFILING	3
#define KVM_PROFILING	4

struct proc_dir_entry;
struct pt_regs;
struct notifier_block;

/* init basic kernel profiler */
void __init profile_init(void);
void profile_tick(int);

/*
 * Add multiple profiler hits to a given address:
 */
void profile_hits(int, void *ip, unsigned int nr_hits);

/*
 * Single profiler hit:
 */
static inline void profile_hit(int type, void *ip)
{
	/*
	 * Speedup for the common (no profiling enabled) case:
	 */
	if (unlikely(prof_on == type))
		profile_hits(type, ip, 1);
}

#ifdef CONFIG_PROC_FS
void create_prof_cpu_mask(struct proc_dir_entry *);
#else
#define create_prof_cpu_mask(x)			do { (void)(x); } while (0)
#endif

enum profile_type {
	PROFILE_TASK_EXIT,
	PROFILE_MUNMAP
};

#ifdef CONFIG_PROFILING

struct task_struct;
struct mm_struct;

/* task is in do_exit() */
void profile_task_exit(struct task_struct * task);

/* task is dead, free task struct ? Returns 1 if
 * the task was taken, 0 if the task should be freed.
 */
int profile_handoff_task(struct task_struct * task);

/* sys_munmap */
void profile_munmap(unsigned long addr);

int task_handoff_register(struct notifier_block * n);
int task_handoff_unregister(struct notifier_block * n);

int profile_event_register(enum profile_type, struct notifier_block * n);
int profile_event_unregister(enum profile_type, struct notifier_block * n);

int register_timer_hook(int (*hook)(struct pt_regs *));
void unregister_timer_hook(int (*hook)(struct pt_regs *));

/* Timer based profiling hook */
extern int (*timer_hook)(struct pt_regs *);

struct pt_regs;

#else

static inline int task_handoff_register(struct notifier_block * n)
{
	return -ENOSYS;
}

static inline int task_handoff_unregister(struct notifier_block * n)
{
	return -ENOSYS;
}

static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
{
	return -ENOSYS;
}

static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
{
	return -ENOSYS;
}

#define profile_task_exit(a) do { } while (0)
#define profile_handoff_task(a) (0)
#define profile_munmap(a) do { } while (0)

static inline int register_timer_hook(int (*hook)(struct pt_regs *))
{
	return -ENOSYS;
}

static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
{
	return;
}

#endif /* CONFIG_PROFILING */

#endif /* __KERNEL__ */

#endif /* _LINUX_PROFILE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_PROFILE_H
	2	#define _LINUX_PROFILE_H
	3
	4	#ifdef __KERNEL__
	5
	6	#include <linux/kernel.h>
1da177e4 LT	7	#include <linux/init.h>
1da177e4 LT	8	#include <linux/cpumask.h>
ece8a684 IM	9	#include <linux/cache.h>
ece8a684 IM	10
1da177e4 LT	11	#include <asm/errno.h>
1da177e4 LT	12
ece8a684 IM	13	extern int prof_on __read_mostly;
ece8a684 IM	14
1da177e4 LT	15	#define CPU_PROFILING 1
1da177e4 LT	16	#define SCHED_PROFILING 2
ece8a684	17	#define SLEEP_PROFILING 3
07031e14	18	#define KVM_PROFILING 4
1da177e4 LT	19
	20	struct proc_dir_entry;
	21	struct pt_regs;
772a0dc5	22	struct notifier_block;
1da177e4 LT	23
	24	/* init basic kernel profiler */
	25	void __init profile_init(void);
7d12e780	26	void profile_tick(int);
ece8a684 IM	27
	28	/*
	29	* Add multiple profiler hits to a given address:
	30	*/
	31	void profile_hits(int, void *ip, unsigned int nr_hits);
	32
	33	/*
	34	* Single profiler hit:
	35	*/
	36	static inline void profile_hit(int type, void *ip)
	37	{
	38	/*
	39	* Speedup for the common (no profiling enabled) case:
	40	*/
	41	if (unlikely(prof_on == type))
	42	profile_hits(type, ip, 1);
	43	}
	44
1da177e4 LT	45	#ifdef CONFIG_PROC_FS
	46	void create_prof_cpu_mask(struct proc_dir_entry *);
	47	#else
	48	#define create_prof_cpu_mask(x) do { (void)(x); } while (0)
	49	#endif
	50
	51	enum profile_type {
	52	PROFILE_TASK_EXIT,
	53	PROFILE_MUNMAP
	54	};
	55
	56	#ifdef CONFIG_PROFILING
	57
1da177e4 LT	58	struct task_struct;
	59	struct mm_struct;
	60
	61	/* task is in do_exit() */
	62	void profile_task_exit(struct task_struct * task);
	63
	64	/* task is dead, free task struct ? Returns 1 if
	65	* the task was taken, 0 if the task should be freed.
	66	*/
	67	int profile_handoff_task(struct task_struct * task);
	68
	69	/* sys_munmap */
	70	void profile_munmap(unsigned long addr);
	71
	72	int task_handoff_register(struct notifier_block * n);
	73	int task_handoff_unregister(struct notifier_block * n);
	74
	75	int profile_event_register(enum profile_type, struct notifier_block * n);
	76	int profile_event_unregister(enum profile_type, struct notifier_block * n);
	77
	78	int register_timer_hook(int (hook)(struct pt_regs ));
	79	void unregister_timer_hook(int (hook)(struct pt_regs ));
	80
	81	/* Timer based profiling hook */
	82	extern int (timer_hook)(struct pt_regs );
	83
	84	struct pt_regs;
	85
	86	#else
	87
	88	static inline int task_handoff_register(struct notifier_block * n)
	89	{
	90	return -ENOSYS;
	91	}
	92
	93	static inline int task_handoff_unregister(struct notifier_block * n)
	94	{
	95	return -ENOSYS;
	96	}
	97
	98	static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
	99	{
	100	return -ENOSYS;
	101	}
	102
	103	static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
	104	{
	105	return -ENOSYS;
	106	}
	107
	108	#define profile_task_exit(a) do { } while (0)
	109	#define profile_handoff_task(a) (0)
	110	#define profile_munmap(a) do { } while (0)
	111
	112	static inline int register_timer_hook(int (hook)(struct pt_regs ))
	113	{
	114	return -ENOSYS;
	115	}
	116
	117	static inline void unregister_timer_hook(int (hook)(struct pt_regs ))
	118	{
	119	return;
	120	}
	121
122	#endif /* CONFIG_PROFILING */
123
124	#endif /* __KERNEL__ */
125
126	#endif /* _LINUX_PROFILE_H */