linux/include/linux/kernel_stat.h
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   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 <asm/irq.h>
  11#include <asm/cputime.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#ifndef CONFIG_GENERIC_HARDIRQS
  39       unsigned int irqs[NR_IRQS];
  40#endif
  41        unsigned long irqs_sum;
  42        unsigned int softirqs[NR_SOFTIRQS];
  43};
  44
  45DECLARE_PER_CPU(struct kernel_stat, kstat);
  46DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  47
  48/* Must have preemption disabled for this to be meaningful. */
  49#define kstat_this_cpu (&__get_cpu_var(kstat))
  50#define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
  51#define kstat_cpu(cpu) per_cpu(kstat, cpu)
  52#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  53
  54extern unsigned long long nr_context_switches(void);
  55
  56#ifndef CONFIG_GENERIC_HARDIRQS
  57
  58struct irq_desc;
  59
  60static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  61                                            struct irq_desc *desc)
  62{
  63        __this_cpu_inc(kstat.irqs[irq]);
  64        __this_cpu_inc(kstat.irqs_sum);
  65}
  66
  67static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  68{
  69       return kstat_cpu(cpu).irqs[irq];
  70}
  71#else
  72#include <linux/irq.h>
  73extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  74
  75#define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  76do {                                                    \
  77        __this_cpu_inc(*(DESC)->kstat_irqs);            \
  78        __this_cpu_inc(kstat.irqs_sum);                 \
  79} while (0)
  80
  81#endif
  82
  83static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  84{
  85        __this_cpu_inc(kstat.softirqs[irq]);
  86}
  87
  88static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  89{
  90       return kstat_cpu(cpu).softirqs[irq];
  91}
  92
  93/*
  94 * Number of interrupts per specific IRQ source, since bootup
  95 */
  96#ifndef CONFIG_GENERIC_HARDIRQS
  97static inline unsigned int kstat_irqs(unsigned int irq)
  98{
  99        unsigned int sum = 0;
 100        int cpu;
 101
 102        for_each_possible_cpu(cpu)
 103                sum += kstat_irqs_cpu(irq, cpu);
 104
 105        return sum;
 106}
 107#else
 108extern unsigned int kstat_irqs(unsigned int irq);
 109#endif
 110
 111/*
 112 * Number of interrupts per cpu, since bootup
 113 */
 114static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 115{
 116        return kstat_cpu(cpu).irqs_sum;
 117}
 118
 119/*
 120 * Lock/unlock the current runqueue - to extract task statistics:
 121 */
 122extern unsigned long long task_delta_exec(struct task_struct *);
 123
 124extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 125extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 126extern void account_steal_time(cputime_t);
 127extern void account_idle_time(cputime_t);
 128
 129extern void account_process_tick(struct task_struct *, int user);
 130extern void account_steal_ticks(unsigned long ticks);
 131extern void account_idle_ticks(unsigned long ticks);
 132
 133#endif /* _LINUX_KERNEL_STAT_H */
 134
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