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 <asm/irq.h>
  10#include <asm/cputime.h>
  11
  12/*
  13 * 'kernel_stat.h' contains the definitions needed for doing
  14 * some kernel statistics (CPU usage, context switches ...),
  15 * used by rstatd/perfmeter
  16 */
  17
  18struct cpu_usage_stat {
  19        cputime64_t user;
  20        cputime64_t nice;
  21        cputime64_t system;
  22        cputime64_t softirq;
  23        cputime64_t irq;
  24        cputime64_t idle;
  25        cputime64_t iowait;
  26        cputime64_t steal;
  27        cputime64_t guest;
  28};
  29
  30struct kernel_stat {
  31        struct cpu_usage_stat   cpustat;
  32#ifndef CONFIG_GENERIC_HARDIRQS
  33       unsigned int irqs[NR_IRQS];
  34#endif
  35        unsigned int softirqs[NR_SOFTIRQS];
  36};
  37
  38DECLARE_PER_CPU(struct kernel_stat, kstat);
  39
  40#define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  41/* Must have preemption disabled for this to be meaningful. */
  42#define kstat_this_cpu  __get_cpu_var(kstat)
  43
  44extern unsigned long long nr_context_switches(void);
  45
  46#ifndef CONFIG_GENERIC_HARDIRQS
  47#define kstat_irqs_this_cpu(irq) \
  48        (kstat_this_cpu.irqs[irq])
  49
  50struct irq_desc;
  51
  52static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  53                                            struct irq_desc *desc)
  54{
  55        kstat_this_cpu.irqs[irq]++;
  56}
  57
  58static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  59{
  60       return kstat_cpu(cpu).irqs[irq];
  61}
  62#else
  63#include <linux/irq.h>
  64extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  65#define kstat_irqs_this_cpu(DESC) \
  66        ((DESC)->kstat_irqs[smp_processor_id()])
  67#define kstat_incr_irqs_this_cpu(irqno, DESC) \
  68        ((DESC)->kstat_irqs[smp_processor_id()]++)
  69
  70#endif
  71
  72static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  73{
  74        kstat_this_cpu.softirqs[irq]++;
  75}
  76
  77static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  78{
  79       return kstat_cpu(cpu).softirqs[irq];
  80}
  81
  82/*
  83 * Number of interrupts per specific IRQ source, since bootup
  84 */
  85static inline unsigned int kstat_irqs(unsigned int irq)
  86{
  87        unsigned int sum = 0;
  88        int cpu;
  89
  90        for_each_possible_cpu(cpu)
  91                sum += kstat_irqs_cpu(irq, cpu);
  92
  93        return sum;
  94}
  95
  96
  97/*
  98 * Lock/unlock the current runqueue - to extract task statistics:
  99 */
 100extern unsigned long long task_delta_exec(struct task_struct *);
 101
 102extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 103extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 104extern void account_steal_time(cputime_t);
 105extern void account_idle_time(cputime_t);
 106
 107extern void account_process_tick(struct task_struct *, int user);
 108extern void account_steal_ticks(unsigned long ticks);
 109extern void account_idle_ticks(unsigned long ticks);
 110
 111#endif /* _LINUX_KERNEL_STAT_H */
 112