| #ifndef _LINUX_KERNEL_VTIME_H |
| #define _LINUX_KERNEL_VTIME_H |
| |
| struct task_struct; |
| |
| #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
| extern void vtime_task_switch(struct task_struct *prev); |
| extern void __vtime_account_system(struct task_struct *tsk); |
| extern void vtime_account_system(struct task_struct *tsk); |
| extern void __vtime_account_idle(struct task_struct *tsk); |
| extern void vtime_account(struct task_struct *tsk); |
| #else |
| static inline void vtime_task_switch(struct task_struct *prev) { } |
| static inline void __vtime_account_system(struct task_struct *tsk) { } |
| static inline void vtime_account_system(struct task_struct *tsk) { } |
| static inline void vtime_account(struct task_struct *tsk) { } |
| #endif |
| |
| #ifdef CONFIG_IRQ_TIME_ACCOUNTING |
| extern void irqtime_account_irq(struct task_struct *tsk); |
| #else |
| static inline void irqtime_account_irq(struct task_struct *tsk) { } |
| #endif |
| |
| static inline void vtime_account_irq_enter(struct task_struct *tsk) |
| { |
| /* |
| * Hardirq can interrupt idle task anytime. So we need vtime_account() |
| * that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING. |
| * Softirq can also interrupt idle task directly if it calls |
| * local_bh_enable(). Such case probably don't exist but we never know. |
| * Ksoftirqd is not concerned because idle time is flushed on context |
| * switch. Softirqs in the end of hardirqs are also not a problem because |
| * the idle time is flushed on hardirq time already. |
| */ |
| vtime_account(tsk); |
| irqtime_account_irq(tsk); |
| } |
| |
| static inline void vtime_account_irq_exit(struct task_struct *tsk) |
| { |
| /* On hard|softirq exit we always account to hard|softirq cputime */ |
| __vtime_account_system(tsk); |
| irqtime_account_irq(tsk); |
| } |
| |
| #endif /* _LINUX_KERNEL_VTIME_H */ |
