linux/include/linux/vtime.h
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   1#ifndef _LINUX_KERNEL_VTIME_H
   2#define _LINUX_KERNEL_VTIME_H
   3
   4struct task_struct;
   5
   6#ifdef CONFIG_VIRT_CPU_ACCOUNTING
   7extern void vtime_task_switch(struct task_struct *prev);
   8extern void vtime_account_system(struct task_struct *tsk);
   9extern void vtime_account_idle(struct task_struct *tsk);
  10extern void vtime_account_user(struct task_struct *tsk);
  11extern void vtime_account_irq_enter(struct task_struct *tsk);
  12
  13#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  14static inline bool vtime_accounting_enabled(void) { return true; }
  15#endif
  16
  17#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
  18
  19static inline void vtime_task_switch(struct task_struct *prev) { }
  20static inline void vtime_account_system(struct task_struct *tsk) { }
  21static inline void vtime_account_user(struct task_struct *tsk) { }
  22static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
  23static inline bool vtime_accounting_enabled(void) { return false; }
  24#endif
  25
  26#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
  27extern void arch_vtime_task_switch(struct task_struct *tsk);
  28extern void vtime_account_irq_exit(struct task_struct *tsk);
  29extern bool vtime_accounting_enabled(void);
  30extern void vtime_user_enter(struct task_struct *tsk);
  31static inline void vtime_user_exit(struct task_struct *tsk)
  32{
  33        vtime_account_user(tsk);
  34}
  35extern void vtime_guest_enter(struct task_struct *tsk);
  36extern void vtime_guest_exit(struct task_struct *tsk);
  37extern void vtime_init_idle(struct task_struct *tsk);
  38#else
  39static inline void vtime_account_irq_exit(struct task_struct *tsk)
  40{
  41        /* On hard|softirq exit we always account to hard|softirq cputime */
  42        vtime_account_system(tsk);
  43}
  44static inline void vtime_user_enter(struct task_struct *tsk) { }
  45static inline void vtime_user_exit(struct task_struct *tsk) { }
  46static inline void vtime_guest_enter(struct task_struct *tsk) { }
  47static inline void vtime_guest_exit(struct task_struct *tsk) { }
  48static inline void vtime_init_idle(struct task_struct *tsk) { }
  49#endif
  50
  51#ifdef CONFIG_IRQ_TIME_ACCOUNTING
  52extern void irqtime_account_irq(struct task_struct *tsk);
  53#else
  54static inline void irqtime_account_irq(struct task_struct *tsk) { }
  55#endif
  56
  57static inline void account_irq_enter_time(struct task_struct *tsk)
  58{
  59        vtime_account_irq_enter(tsk);
  60        irqtime_account_irq(tsk);
  61}
  62
  63static inline void account_irq_exit_time(struct task_struct *tsk)
  64{
  65        vtime_account_irq_exit(tsk);
  66        irqtime_account_irq(tsk);
  67}
  68
  69#endif /* _LINUX_KERNEL_VTIME_H */
  70
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