include/linux/profile.h

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