| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_KERNEL_VTIME_H |
| 2 | #define _LINUX_KERNEL_VTIME_H |
| 3 | |
| 4 | struct task_struct; |
| 5 | |
| 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); |
| Frederic Weisbecker | fd25b4c | 2012-11-13 18:21:22 +0100 | [diff] [blame^] | 9 | extern void vtime_account_system_irqsafe(struct task_struct *tsk); |
| 10 | extern void vtime_account_idle(struct task_struct *tsk); |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 11 | extern void vtime_account(struct task_struct *tsk); |
| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 12 | #else |
| 13 | static inline void vtime_task_switch(struct task_struct *prev) { } |
| Frederic Weisbecker | 1111333 | 2012-10-24 18:05:51 +0200 | [diff] [blame] | 14 | static inline void vtime_account_system(struct task_struct *tsk) { } |
| Frederic Weisbecker | fd25b4c | 2012-11-13 18:21:22 +0100 | [diff] [blame^] | 15 | static inline void vtime_account_system_irqsafe(struct task_struct *tsk) { } |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 16 | static inline void vtime_account(struct task_struct *tsk) { } |
| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 17 | #endif |
| 18 | |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 19 | #ifdef CONFIG_IRQ_TIME_ACCOUNTING |
| 20 | extern void irqtime_account_irq(struct task_struct *tsk); |
| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 21 | #else |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 22 | static inline void irqtime_account_irq(struct task_struct *tsk) { } |
| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 23 | #endif |
| 24 | |
| Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 25 | static inline void vtime_account_irq_enter(struct task_struct *tsk) |
| 26 | { |
| 27 | /* |
| 28 | * Hardirq can interrupt idle task anytime. So we need vtime_account() |
| 29 | * that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING. |
| 30 | * Softirq can also interrupt idle task directly if it calls |
| 31 | * local_bh_enable(). Such case probably don't exist but we never know. |
| 32 | * Ksoftirqd is not concerned because idle time is flushed on context |
| 33 | * switch. Softirqs in the end of hardirqs are also not a problem because |
| 34 | * the idle time is flushed on hardirq time already. |
| 35 | */ |
| 36 | vtime_account(tsk); |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 37 | irqtime_account_irq(tsk); |
| Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | static inline void vtime_account_irq_exit(struct task_struct *tsk) |
| 41 | { |
| Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 42 | /* On hard|softirq exit we always account to hard|softirq cputime */ |
| Frederic Weisbecker | fd25b4c | 2012-11-13 18:21:22 +0100 | [diff] [blame^] | 43 | vtime_account_system(tsk); |
| Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 44 | irqtime_account_irq(tsk); |
| Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 45 | } |
| 46 | |
| Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 47 | #endif /* _LINUX_KERNEL_VTIME_H */ |