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        cputime64_t guest_nice;
  29};
  30
  31struct kernel_stat {
  32        struct cpu_usage_stat   cpustat;
  33#ifndef CONFIG_GENERIC_HARDIRQS
  34       unsigned int irqs[NR_IRQS];
  35#endif
  36        unsigned int softirqs[NR_SOFTIRQS];
  37};
  38
  39DECLARE_PER_CPU(struct kernel_stat, kstat);
  40
  41#define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  42/* Must have preemption disabled for this to be meaningful. */
  43#define kstat_this_cpu  __get_cpu_var(kstat)
  44
  45extern unsigned long long nr_context_switches(void);
  46
  47#ifndef CONFIG_GENERIC_HARDIRQS
  48#define kstat_irqs_this_cpu(irq) \
  49        (kstat_this_cpu.irqs[irq])
  50
  51struct irq_desc;
  52
  53static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  54                                            struct irq_desc *desc)
  55{
  56        kstat_this_cpu.irqs[irq]++;
  57}
  58
  59static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  60{
  61       return kstat_cpu(cpu).irqs[irq];
  62}
  63#else
  64#include <linux/irq.h>
  65extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  66#define kstat_irqs_this_cpu(DESC) \
  67        ((DESC)->kstat_irqs[smp_processor_id()])
  68#define kstat_incr_irqs_this_cpu(irqno, DESC) \
  69        ((DESC)->kstat_irqs[smp_processor_id()]++)
  70
  71#endif
  72
  73static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  74{
  75        kstat_this_cpu.softirqs[irq]++;
  76}
  77
  78static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  79{
  80       return kstat_cpu(cpu).softirqs[irq];
  81}
  82
  83/*
  84 * Number of interrupts per specific IRQ source, since bootup
  85 */
  86static inline unsigned int kstat_irqs(unsigned int irq)
  87{
  88        unsigned int sum = 0;
  89        int cpu;
  90
  91        for_each_possible_cpu(cpu)
  92                sum += kstat_irqs_cpu(irq, cpu);
  93
  94        return sum;
  95}
  96
  97
  98/*
  99 * Lock/unlock the current runqueue - to extract task statistics:
 100 */
 101extern unsigned long long task_delta_exec(struct task_struct *);
 102
 103extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 104extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 105extern void account_steal_time(cputime_t);
 106extern void account_idle_time(cputime_t);
 107
 108extern void account_process_tick(struct task_struct *, int user);
 109extern void account_steal_ticks(unsigned long ticks);
 110extern void account_idle_ticks(unsigned long ticks);
 111
 112#endif /* _LINUX_KERNEL_STAT_H */
 113