kernel_stat.h 1.93 KB
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#ifndef _LINUX_KERNEL_STAT_H
#define _LINUX_KERNEL_STAT_H

#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/percpu.h>
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#include <linux/cpumask.h>
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#include <asm/irq.h>
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#include <asm/cputime.h>

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

struct cpu_usage_stat {
	cputime64_t user;
	cputime64_t nice;
	cputime64_t system;
	cputime64_t softirq;
	cputime64_t irq;
	cputime64_t idle;
	cputime64_t iowait;
	cputime64_t steal;
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	cputime64_t guest;
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};

struct kernel_stat {
	struct cpu_usage_stat	cpustat;
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#ifndef CONFIG_SPARSE_IRQ
       unsigned int irqs[NR_IRQS];
#endif
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};

DECLARE_PER_CPU(struct kernel_stat, kstat);

#define kstat_cpu(cpu)	per_cpu(kstat, cpu)
/* Must have preemption disabled for this to be meaningful. */
#define kstat_this_cpu	__get_cpu_var(kstat)

extern unsigned long long nr_context_switches(void);

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#ifndef CONFIG_SPARSE_IRQ
#define kstat_irqs_this_cpu(irq) \
	(kstat_this_cpu.irqs[irq])

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struct irq_desc;
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static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
					    struct irq_desc *desc)
{
	kstat_this_cpu.irqs[irq]++;
}
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#endif

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#ifndef CONFIG_SPARSE_IRQ
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static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
       return kstat_cpu(cpu).irqs[irq];
}
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#else
extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
#endif
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/*
 * Number of interrupts per specific IRQ source, since bootup
 */
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static inline unsigned int kstat_irqs(unsigned int irq)
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{
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	unsigned int sum = 0;
	int cpu;
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	for_each_possible_cpu(cpu)
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		sum += kstat_irqs_cpu(irq, cpu);
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	return sum;
}

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extern unsigned long long task_delta_exec(struct task_struct *);
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extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
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extern void account_steal_time(struct task_struct *, cputime_t);

#endif /* _LINUX_KERNEL_STAT_H */