1 #ifndef _LINUX_KERNEL_VTIME_H
2 #define _LINUX_KERNEL_VTIME_H
6 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
7 extern void vtime_task_switch(struct task_struct *prev);
8 extern void vtime_account_system(struct task_struct *tsk);
9 extern void vtime_account_system_irqsafe(struct task_struct *tsk);
10 extern void vtime_account_idle(struct task_struct *tsk);
11 extern void vtime_account_user(struct task_struct *tsk);
12 extern void vtime_account(struct task_struct *tsk);
14 static inline void vtime_task_switch(struct task_struct *prev) { }
15 static inline void vtime_account_system(struct task_struct *tsk) { }
16 static inline void vtime_account_system_irqsafe(struct task_struct *tsk) { }
17 static inline void vtime_account(struct task_struct *tsk) { }
20 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
21 extern void irqtime_account_irq(struct task_struct *tsk);
23 static inline void irqtime_account_irq(struct task_struct *tsk) { }
26 static inline void vtime_account_irq_enter(struct task_struct *tsk)
29 * Hardirq can interrupt idle task anytime. So we need vtime_account()
30 * that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING.
31 * Softirq can also interrupt idle task directly if it calls
32 * local_bh_enable(). Such case probably don't exist but we never know.
33 * Ksoftirqd is not concerned because idle time is flushed on context
34 * switch. Softirqs in the end of hardirqs are also not a problem because
35 * the idle time is flushed on hardirq time already.
38 irqtime_account_irq(tsk);
41 static inline void vtime_account_irq_exit(struct task_struct *tsk)
43 /* On hard|softirq exit we always account to hard|softirq cputime */
44 vtime_account_system(tsk);
45 irqtime_account_irq(tsk);
48 #endif /* _LINUX_KERNEL_VTIME_H */