LXR linux/include/linux/profile.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_PROFILE_H
   3#define _LINUX_PROFILE_H
   4
   5#include <linux/kernel.h>
   6#include <linux/init.h>
   7#include <linux/cpumask.h>
   8#include <linux/cache.h>
   9
  10#include <asm/errno.h>
  11
  12#define CPU_PROFILING   1
  13#define SCHED_PROFILING 2
  14#define SLEEP_PROFILING 3
  15#define KVM_PROFILING   4
  16
  17struct proc_dir_entry;
  18struct notifier_block;
  19
  20#if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
  21void create_prof_cpu_mask(void);
  22int create_proc_profile(void);
  23#else
  24static inline void create_prof_cpu_mask(void)
  25{
  26}
  27
  28static inline int create_proc_profile(void)
  29{
  30        return 0;
  31}
  32#endif
  33
  34#ifdef CONFIG_PROFILING
  35
  36extern int prof_on __read_mostly;
  37
  38/* init basic kernel profiler */
  39int profile_init(void);
  40int profile_setup(char *str);
  41void profile_tick(int type);
  42int setup_profiling_timer(unsigned int multiplier);
  43
  44/*
  45 * Add multiple profiler hits to a given address:
  46 */
  47void profile_hits(int type, void *ip, unsigned int nr_hits);
  48
  49/*
  50 * Single profiler hit:
  51 */
  52static inline void profile_hit(int type, void *ip)
  53{
  54        /*
  55         * Speedup for the common (no profiling enabled) case:
  56         */
  57        if (unlikely(prof_on == type))
  58                profile_hits(type, ip, 1);
  59}
  60
  61struct task_struct;
  62struct mm_struct;
  63
  64#else
  65
  66#define prof_on 0
  67
  68static inline int profile_init(void)
  69{
  70        return 0;
  71}
  72
  73static inline void profile_tick(int type)
  74{
  75        return;
  76}
  77
  78static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
  79{
  80        return;
  81}
  82
  83static inline void profile_hit(int type, void *ip)
  84{
  85        return;
  86}
  87
  88
  89#endif /* CONFIG_PROFILING */
  90
  91#endif /* _LINUX_PROFILE_H */
  92