diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2012-10-06 05:23:22 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2012-10-29 21:31:32 +0100 |
| commit | 3e1df4f506836e6bea1ab61cf88c75c8b1840643 (patch) | |
| tree | 58be18cf3dce7a407c84ab2532e92bdb8b7ee067 | |
| parent | fa5058f3b63153e0147ef65bcdb3a4ee63581346 (diff) | |
cputime: Separate irqtime accounting from generic vtime
vtime_account() doesn't have the same role in
CONFIG_VIRT_CPU_ACCOUNTING and CONFIG_IRQ_TIME_ACCOUNTING.
In the first case it handles time accounting in any context. In
the second case it only handles irq time accounting.
So when vtime_account() is called from outside vtime_account_irq_*()
this call is pointless to CONFIG_IRQ_TIME_ACCOUNTING.
To fix the confusion, change vtime_account() to irqtime_account_irq()
in CONFIG_IRQ_TIME_ACCOUNTING. This way we ensure future account_vtime()
calls won't waste useless cycles in the irqtime APIs.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
| -rw-r--r-- | include/linux/vtime.h | 18 | ||||
| -rw-r--r-- | kernel/sched/cputime.c | 4 |
2 files changed, 10 insertions, 12 deletions
diff --git a/include/linux/vtime.h b/include/linux/vtime.h index c35c02223da..0c2a2d30302 100644 --- a/include/linux/vtime.h +++ b/include/linux/vtime.h @@ -8,17 +8,18 @@ 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 -#if !defined(CONFIG_VIRT_CPU_ACCOUNTING) && !defined(CONFIG_IRQ_TIME_ACCOUNTING) -static inline void vtime_account(struct task_struct *tsk) -{ -} +#ifdef CONFIG_IRQ_TIME_ACCOUNTING +extern void irqtime_account_irq(struct task_struct *tsk); #else -extern void vtime_account(struct task_struct *tsk); +static inline void irqtime_account_irq(struct task_struct *tsk) { } #endif static inline void vtime_account_irq_enter(struct task_struct *tsk) @@ -33,17 +34,14 @@ static inline void vtime_account_irq_enter(struct task_struct *tsk) * 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) { -#ifdef CONFIG_VIRT_CPU_ACCOUNTING /* On hard|softirq exit we always account to hard|softirq cputime */ __vtime_account_system(tsk); -#endif -#ifdef CONFIG_IRQ_TIME_ACCOUNTING - vtime_account(tsk); -#endif + irqtime_account_irq(tsk); } #endif /* _LINUX_KERNEL_VTIME_H */ diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 0359f47b0ae..8d859dae5be 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -43,7 +43,7 @@ DEFINE_PER_CPU(seqcount_t, irq_time_seq); * Called before incrementing preempt_count on {soft,}irq_enter * and before decrementing preempt_count on {soft,}irq_exit. */ -void vtime_account(struct task_struct *curr) +void irqtime_account_irq(struct task_struct *curr) { unsigned long flags; s64 delta; @@ -73,7 +73,7 @@ void vtime_account(struct task_struct *curr) irq_time_write_end(); local_irq_restore(flags); } -EXPORT_SYMBOL_GPL(vtime_account); +EXPORT_SYMBOL_GPL(irqtime_account_irq); static int irqtime_account_hi_update(void) { |