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 */ 138