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 <linux/interrupt.h>
   9#include <linux/sched.h>
  10#include <linux/vtime.h>
  11#include <asm/irq.h>
  12
  13/*
  14 * 'kernel_stat.h' contains the definitions needed for doing
  15 * some kernel statistics (CPU usage, context switches ...),
  16 * used by rstatd/perfmeter
  17 */
  18
  19enum cpu_usage_stat {
  20        CPUTIME_USER,
  21        CPUTIME_NICE,
  22        CPUTIME_SYSTEM,
  23        CPUTIME_SOFTIRQ,
  24        CPUTIME_IRQ,
  25        CPUTIME_IDLE,
  26        CPUTIME_IOWAIT,
  27        CPUTIME_STEAL,
  28        CPUTIME_GUEST,
  29        CPUTIME_GUEST_NICE,
  30        NR_STATS,
  31};
  32
  33struct kernel_cpustat {
  34        u64 cpustat[NR_STATS];
  35};
  36
  37struct kernel_stat {
  38        unsigned long irqs_sum;
  39        unsigned int softirqs[NR_SOFTIRQS];
  40};
  41
  42DECLARE_PER_CPU(struct kernel_stat, kstat);
  43DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  44
  45/* Must have preemption disabled for this to be meaningful. */
  46#define kstat_this_cpu this_cpu_ptr(&kstat)
  47#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
  48#define kstat_cpu(cpu) per_cpu(kstat, cpu)
  49#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  50
  51extern unsigned long long nr_context_switches(void);
  52
  53extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  54extern void kstat_incr_irq_this_cpu(unsigned int irq);
  55
  56static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  57{
  58        __this_cpu_inc(kstat.softirqs[irq]);
  59}
  60
  61static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  62{
  63       return kstat_cpu(cpu).softirqs[irq];
  64}
  65
  66/*
  67 * Number of interrupts per specific IRQ source, since bootup
  68 */
  69extern unsigned int kstat_irqs(unsigned int irq);
  70extern unsigned int kstat_irqs_usr(unsigned int irq);
  71
  72/*
  73 * Number of interrupts per cpu, since bootup
  74 */
  75static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
  76{
  77        return kstat_cpu(cpu).irqs_sum;
  78}
  79
  80extern void account_user_time(struct task_struct *, u64);
  81extern void account_guest_time(struct task_struct *, u64);
  82extern void account_system_time(struct task_struct *, int, u64);
  83extern void account_system_index_time(struct task_struct *, u64,
  84                                      enum cpu_usage_stat);
  85extern void account_steal_time(u64);
  86extern void account_idle_time(u64);
  87
  88#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  89static inline void account_process_tick(struct task_struct *tsk, int user)
  90{
  91        vtime_flush(tsk);
  92}
  93#else
  94extern void account_process_tick(struct task_struct *, int user);
  95#endif
  96
  97extern void account_idle_ticks(unsigned long ticks);
  98
  99#endif /* _LINUX_KERNEL_STAT_H */
 100