Release 4.12 include/linux/kernel_stat.h

#ifndef _LINUX_KERNEL_STAT_H

#define _LINUX_KERNEL_STAT_H

#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/vtime.h>
#include <asm/irq.h>

/*
 * 'kernel_stat.h' contains the definitions needed for doing
 * some kernel statistics (CPU usage, context switches ...),
 * used by rstatd/perfmeter
 */


enum cpu_usage_stat {
	
CPUTIME_USER,
	
CPUTIME_NICE,
	
CPUTIME_SYSTEM,
	
CPUTIME_SOFTIRQ,
	
CPUTIME_IRQ,
	
CPUTIME_IDLE,
	
CPUTIME_IOWAIT,
	
CPUTIME_STEAL,
	
CPUTIME_GUEST,
	
CPUTIME_GUEST_NICE,
	
NR_STATS,
};


struct kernel_cpustat {
	
u64 cpustat[NR_STATS];
};


struct kernel_stat {
	
unsigned long irqs_sum;
	
unsigned int softirqs[NR_SOFTIRQS];
};

DECLARE_PER_CPU(struct kernel_stat, kstat);
DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);

/* Must have preemption disabled for this to be meaningful. */

#define kstat_this_cpu this_cpu_ptr(&kstat)

#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)

#define kstat_cpu(cpu) per_cpu(kstat, cpu)

#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)

extern unsigned long long nr_context_switches(void);

extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
extern void kstat_incr_irq_this_cpu(unsigned int irq);



static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
{
	__this_cpu_inc(kstat.softirqs[irq]);
}

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static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
{
       return kstat_cpu(cpu).softirqs[irq];
}

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/*
 * Number of interrupts per specific IRQ source, since bootup
 */
extern unsigned int kstat_irqs(unsigned int irq);
extern unsigned int kstat_irqs_usr(unsigned int irq);

/*
 * Number of interrupts per cpu, since bootup
 */


static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
{
	return kstat_cpu(cpu).irqs_sum;
}

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extern void account_user_time(struct task_struct *, u64);
extern void account_guest_time(struct task_struct *, u64);
extern void account_system_time(struct task_struct *, int, u64);
extern void account_system_index_time(struct task_struct *, u64,
				      enum cpu_usage_stat);
extern void account_steal_time(u64);
extern void account_idle_time(u64);

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE


static inline void account_process_tick(struct task_struct *tsk, int user)
{
	vtime_flush(tsk);
}
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#else
extern void account_process_tick(struct task_struct *, int user);
#endif

extern void account_idle_ticks(unsigned long ticks);

#endif /* _LINUX_KERNEL_STAT_H */
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Andrew Morton
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Yinghai Lu
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Michael Neuling
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Frank Mayhar
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Directory: include/linux

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