diff options
Diffstat (limited to 'include/linux/vtime.h')
| -rw-r--r-- | include/linux/vtime.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/linux/vtime.h b/include/linux/vtime.h new file mode 100644 index 000000000000..ae30ab58431a --- /dev/null +++ b/include/linux/vtime.h @@ -0,0 +1,48 @@ +#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_irqsafe(struct task_struct *tsk); +extern void vtime_account_idle(struct task_struct *tsk); +extern void vtime_account_user(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_irqsafe(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 */ |