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 int setup_profiling_timer(unsigned int multiplier);
  48
  49 /*
  50  * Add multiple profiler hits to a given address:
  51  */
  52 void profile_hits(int type, void *ip, unsigned int nr_hits);
  53
  54 /*
  55  * Single profiler hit:
  56  */
  57 static inline void profile_hit(int type, void *ip)
  58 {
  59         /*
  60          * Speedup for the common (no profiling enabled) case:
  61          */
  62         if (unlikely(prof_on == type))
  63                 profile_hits(type, ip, 1);
  64 }
  65
  66 struct task_struct;
  67 struct mm_struct;
  68
  69 /* task is in do_exit() */
  70 void profile_task_exit(struct task_struct * task);
  71
  72 /* task is dead, free task struct ? Returns 1 if
  73  * the task was taken, 0 if the task should be freed.
  74  */
  75 int profile_handoff_task(struct task_struct * task);
  76
  77 /* sys_munmap */
  78 void profile_munmap(unsigned long addr);
  79
  80 int task_handoff_register(struct notifier_block * n);
  81 int task_handoff_unregister(struct notifier_block * n);
  82
  83 int profile_event_register(enum profile_type, struct notifier_block * n);
  84 int profile_event_unregister(enum profile_type, struct notifier_block * n);
  85
  86 struct pt_regs;
  87
  88 #else
  89
  90 #define prof_on 0
  91
  92 static inline int profile_init(void)
  93 {
  94         return 0;
  95 }
  96
  97 static inline void profile_tick(int type)
  98 {
  99         return;
 100 }
 101
 102 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
 103 {
 104         return;
 105 }
 106
 107 static inline void profile_hit(int type, void *ip)
 108 {
 109         return;
 110 }
 111
 112 static inline int task_handoff_register(struct notifier_block * n)
 113 {
 114         return -ENOSYS;
 115 }
 116
 117 static inline int task_handoff_unregister(struct notifier_block * n)
 118 {
 119         return -ENOSYS;
 120 }
 121
 122 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
 123 {
 124         return -ENOSYS;
 125 }
 126
 127 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
 128 {
 129         return -ENOSYS;
 130 }
 131
 132 #define profile_task_exit(a) do { } while (0)
 133 #define profile_handoff_task(a) (0)
 134 #define profile_munmap(a) do { } while (0)
 135
 136 #endif /* CONFIG_PROFILING */
 137
 138 #endif /* _LINUX_PROFILE_H */