mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 14:53:11 +01:00
Frederic Weisbecker
bcebdf8465
All vtime implementations just flush the user time on process tick. Consolidate that in generic code by calling a user time accounting helper. This avoids an indirect call in ia64 and prepare to also consolidate vtime context switch code. Signed-off-by: Frederic Weisbecker <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
#ifndef _LINUX_KERNEL_VTIME_H
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#define _LINUX_KERNEL_VTIME_H
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struct task_struct;
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING
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extern void vtime_task_switch(struct task_struct *prev);
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extern void vtime_account_system(struct task_struct *tsk);
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extern void vtime_account_system_irqsafe(struct task_struct *tsk);
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extern void vtime_account_idle(struct task_struct *tsk);
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extern void vtime_account_user(struct task_struct *tsk);
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extern void vtime_account(struct task_struct *tsk);
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#else
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static inline void vtime_task_switch(struct task_struct *prev) { }
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static inline void vtime_account_system(struct task_struct *tsk) { }
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static inline void vtime_account_system_irqsafe(struct task_struct *tsk) { }
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static inline void vtime_account(struct task_struct *tsk) { }
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#endif
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#ifdef CONFIG_IRQ_TIME_ACCOUNTING
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extern void irqtime_account_irq(struct task_struct *tsk);
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#else
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static inline void irqtime_account_irq(struct task_struct *tsk) { }
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#endif
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static inline void vtime_account_irq_enter(struct task_struct *tsk)
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{
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/*
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* Hardirq can interrupt idle task anytime. So we need vtime_account()
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* that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING.
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* Softirq can also interrupt idle task directly if it calls
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* local_bh_enable(). Such case probably don't exist but we never know.
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* Ksoftirqd is not concerned because idle time is flushed on context
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* switch. Softirqs in the end of hardirqs are also not a problem because
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* the idle time is flushed on hardirq time already.
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*/
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vtime_account(tsk);
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irqtime_account_irq(tsk);
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}
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static inline void vtime_account_irq_exit(struct task_struct *tsk)
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{
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/* On hard|softirq exit we always account to hard|softirq cputime */
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vtime_account_system(tsk);
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irqtime_account_irq(tsk);
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}
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#endif /* _LINUX_KERNEL_VTIME_H */
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