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#include <asm/cputime.h>
  13
  14/*
  15 * 'kernel_stat.h' contains the definitions needed for doing
  16 * some kernel statistics (CPU usage, context switches ...),
  17 * used by rstatd/perfmeter
  18 */
  19
  20enum cpu_usage_stat {
  21        CPUTIME_USER,
  22        CPUTIME_NICE,
  23        CPUTIME_SYSTEM,
  24        CPUTIME_SOFTIRQ,
  25        CPUTIME_IRQ,
  26        CPUTIME_IDLE,
  27        CPUTIME_IOWAIT,
  28        CPUTIME_STEAL,
  29        CPUTIME_GUEST,
  30        CPUTIME_GUEST_NICE,
  31        NR_STATS,
  32};
  33
  34struct kernel_cpustat {
  35        u64 cpustat[NR_STATS];
  36};
  37
  38struct kernel_stat {
  39        unsigned long irqs_sum;
  40        unsigned int softirqs[NR_SOFTIRQS];
  41};
  42
  43DECLARE_PER_CPU(struct kernel_stat, kstat);
  44DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  45
  46/* Must have preemption disabled for this to be meaningful. */
  47#define kstat_this_cpu (&__get_cpu_var(kstat))
  48#define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
  49#define kstat_cpu(cpu) per_cpu(kstat, cpu)
  50#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  51
  52extern unsigned long long nr_context_switches(void);
  53
  54#include <linux/irq.h>
  55extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  56
  57#define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  58do {                                                    \
  59        __this_cpu_inc(*(DESC)->kstat_irqs);            \
  60        __this_cpu_inc(kstat.irqs_sum);                 \
  61} while (0)
  62
  63static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  64{
  65        __this_cpu_inc(kstat.softirqs[irq]);
  66}
  67
  68static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  69{
  70       return kstat_cpu(cpu).softirqs[irq];
  71}
  72
  73/*
  74 * Number of interrupts per specific IRQ source, since bootup
  75 */
  76extern unsigned int kstat_irqs(unsigned int irq);
  77
  78/*
  79 * Number of interrupts per cpu, since bootup
  80 */
  81static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
  82{
  83        return kstat_cpu(cpu).irqs_sum;
  84}
  85
  86/*
  87 * Lock/unlock the current runqueue - to extract task statistics:
  88 */
  89extern unsigned long long task_delta_exec(struct task_struct *);
  90
  91extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
  92extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
  93extern void account_steal_time(cputime_t);
  94extern void account_idle_time(cputime_t);
  95
  96#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  97static inline void account_process_tick(struct task_struct *tsk, int user)
  98{
  99        vtime_account_user(tsk);
 100}
 101#else
 102extern void account_process_tick(struct task_struct *, int user);
 103#endif
 104
 105extern void account_steal_ticks(unsigned long ticks);
 106extern void account_idle_ticks(unsigned long ticks);
 107
 108#endif /* _LINUX_KERNEL_STAT_H */
 109