kernel-ark/include/linux/profile.h
Ingo Molnar 07031e14c1 [PATCH] KVM: add VM-exit profiling
This adds the profile=kvm boot option, which enables KVM to profile VM
exits.

Use: "readprofile -m ./System.map | sort -n" to see the resulting
output:

   [...]
   18246 serial_out                               148.3415
   18945 native_flush_tlb                         378.9000
   23618 serial_in                                212.7748
   29279 __spin_unlock_irq                        622.9574
   43447 native_apic_write                        2068.9048
   52702 enable_8259A_irq                         742.2817
   54250 vgacon_scroll                             89.3740
   67394 ide_inb                                  6126.7273
   79514 copy_page_range                           98.1654
   84868 do_wp_page                                86.6000
  140266 pit_read                                 783.6089
  151436 ide_outb                                 25239.3333
  152668 native_io_delay                          21809.7143
  174783 mask_and_ack_8259A                       783.7803
  362404 native_set_pte_at                        36240.4000
 1688747 total                                      0.5009

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-11 18:18:21 -08:00

127 lines
2.6 KiB
C

#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 */