LXR linux/include/linux/kernel

   1#ifndef _LINUX_KERNEL_STAT_H
   2#define _LINUX_KERNEL_STAT_H
   3
   4#include <linux/smp.h>
   5#include <linux/threads.h>
   6#include <linux/percpu.h>
   7#include <linux/cpumask.h>
   8#include <asm/irq.h>
   9#include <asm/cputime.h>
  10
  11/*
  12 * 'kernel_stat.h' contains the definitions needed for doing
  13 * some kernel statistics (CPU usage, context switches ...),
  14 * used by rstatd/perfmeter
  15 */
  16
  17struct cpu_usage_stat {
  18        cputime64_t user;
  19        cputime64_t nice;
  20        cputime64_t system;
  21        cputime64_t softirq;
  22        cputime64_t irq;
  23        cputime64_t idle;
  24        cputime64_t iowait;
  25        cputime64_t steal;
  26        cputime64_t guest;
  27};
  28
  29struct kernel_stat {
  30        struct cpu_usage_stat   cpustat;
  31        unsigned int irqs[NR_IRQS];
  32};
  33
  34DECLARE_PER_CPU(struct kernel_stat, kstat);
  35
  36#define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  37/* Must have preemption disabled for this to be meaningful. */
  38#define kstat_this_cpu  __get_cpu_var(kstat)
  39
  40extern unsigned long long nr_context_switches(void);
  41
  42struct irq_desc;
  43
  44static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  45                                            struct irq_desc *desc)
  46{
  47        kstat_this_cpu.irqs[irq]++;
  48}
  49
  50static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  51{
  52       return kstat_cpu(cpu).irqs[irq];
  53}
  54
  55/*
  56 * Number of interrupts per specific IRQ source, since bootup
  57 */
  58static inline unsigned int kstat_irqs(unsigned int irq)
  59{
  60        unsigned int sum = 0;
  61        int cpu;
  62
  63        for_each_possible_cpu(cpu)
  64                sum += kstat_irqs_cpu(irq, cpu);
  65
  66        return sum;
  67}
  68
  69extern unsigned long long task_delta_exec(struct task_struct *);
  70extern void account_user_time(struct task_struct *, cputime_t);
  71extern void account_user_time_scaled(struct task_struct *, cputime_t);
  72extern void account_system_time(struct task_struct *, int, cputime_t);
  73extern void account_system_time_scaled(struct task_struct *, cputime_t);
  74extern void account_steal_time(struct task_struct *, cputime_t);
  75
  76#endif /* _LINUX_KERNEL_STAT_H */
  77