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 #define CPU_PROFILING   1
  12 #define SCHED_PROFILING 2
  13 #define SLEEP_PROFILING 3
  14 #define KVM_PROFILING   4
  15
  16 struct proc_dir_entry;
  17 struct pt_regs;
  18 struct notifier_block;
  19
  20 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
  21 void create_prof_cpu_mask(void);
  22 int create_proc_profile(void);
  23 #else
  24 static inline void create_prof_cpu_mask(void)
  25 {
  26 }
  27
  28 static inline int create_proc_profile(void)
  29 {
  30         return 0;
  31 }
  32 #endif
  33
  34 enum profile_type {
  35         PROFILE_TASK_EXIT,
  36         PROFILE_MUNMAP
  37 };
  38
  39 #ifdef CONFIG_PROFILING
  40
  41 extern int prof_on __read_mostly;
  42
  43 /* init basic kernel profiler */
  44 int profile_init(void);
  45 int profile_setup(char *str);
  46 void profile_tick(int type);
  47
  48 /*
  49  * Add multiple profiler hits to a given address:
  50  */
  51 void profile_hits(int type, void *ip, unsigned int nr_hits);
  52
  53 /*
  54  * Single profiler hit:
  55  */
  56 static inline void profile_hit(int type, void *ip)
  57 {
  58         /*
  59          * Speedup for the common (no profiling enabled) case:
  60          */
  61         if (unlikely(prof_on == type))
  62                 profile_hits(type, ip, 1);
  63 }
  64
  65 struct task_struct;
  66 struct mm_struct;
  67
  68 /* task is in do_exit() */
  69 void profile_task_exit(struct task_struct * task);
  70
  71 /* task is dead, free task struct ? Returns 1 if
  72  * the task was taken, 0 if the task should be freed.
  73  */
  74 int profile_handoff_task(struct task_struct * task);
  75
  76 /* sys_munmap */
  77 void profile_munmap(unsigned long addr);
  78
  79 int task_handoff_register(struct notifier_block * n);
  80 int task_handoff_unregister(struct notifier_block * n);
  81
  82 int profile_event_register(enum profile_type, struct notifier_block * n);
  83 int profile_event_unregister(enum profile_type, struct notifier_block * n);
  84
  85 struct pt_regs;
  86
  87 #else
  88
  89 #define prof_on 0
  90
  91 static inline int profile_init(void)
  92 {
  93         return 0;
  94 }
  95
  96 static inline void profile_tick(int type)
  97 {
  98         return;
  99 }
 100
 101 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
 102 {
 103         return;
 104 }
 105
 106 static inline void profile_hit(int type, void *ip)
 107 {
 108         return;
 109 }
 110
 111 static inline int task_handoff_register(struct notifier_block * n)
 112 {
 113         return -ENOSYS;
 114 }
 115
 116 static inline int task_handoff_unregister(struct notifier_block * n)
 117 {
 118         return -ENOSYS;
 119 }
 120
 121 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
 122 {
 123         return -ENOSYS;
 124 }
 125
 126 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
 127 {
 128         return -ENOSYS;
 129 }
 130
 131 #define profile_task_exit(a) do { } while (0)
 132 #define profile_handoff_task(a) (0)
 133 #define profile_munmap(a) do { } while (0)
 134
 135 #endif /* CONFIG_PROFILING */
 136
 137 #endif /* _LINUX_PROFILE_H */