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 long irqs_sum;
  37        unsigned int softirqs[NR_SOFTIRQS];
  38};
  39
  40DECLARE_PER_CPU(struct kernel_stat, kstat);
  41
  42#define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  43/* Must have preemption disabled for this to be meaningful. */
  44#define kstat_this_cpu  __get_cpu_var(kstat)
  45
  46extern unsigned long long nr_context_switches(void);
  47
  48#ifndef CONFIG_GENERIC_HARDIRQS
  49
  50struct irq_desc;
  51
  52static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  53                                            struct irq_desc *desc)
  54{
  55        __this_cpu_inc(kstat.irqs[irq]);
  56        __this_cpu_inc(kstat.irqs_sum);
  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
  67#define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  68do {                                                    \
  69        __this_cpu_inc(*(DESC)->kstat_irqs);            \
  70        __this_cpu_inc(kstat.irqs_sum);                 \
  71} while (0)
  72
  73#endif
  74
  75static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  76{
  77        __this_cpu_inc(kstat.softirqs[irq]);
  78}
  79
  80static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  81{
  82       return kstat_cpu(cpu).softirqs[irq];
  83}
  84
  85/*
  86 * Number of interrupts per specific IRQ source, since bootup
  87 */
  88#ifndef CONFIG_GENERIC_HARDIRQS
  89static inline unsigned int kstat_irqs(unsigned int irq)
  90{
  91        unsigned int sum = 0;
  92        int cpu;
  93
  94        for_each_possible_cpu(cpu)
  95                sum += kstat_irqs_cpu(irq, cpu);
  96
  97        return sum;
  98}
  99#else
 100extern unsigned int kstat_irqs(unsigned int irq);
 101#endif
 102
 103/*
 104 * Number of interrupts per cpu, since bootup
 105 */
 106static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 107{
 108        return kstat_cpu(cpu).irqs_sum;
 109}
 110
 111/*
 112 * Lock/unlock the current runqueue - to extract task statistics:
 113 */
 114extern unsigned long long task_delta_exec(struct task_struct *);
 115
 116extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 117extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 118extern void account_steal_time(cputime_t);
 119extern void account_idle_time(cputime_t);
 120
 121extern void account_process_tick(struct task_struct *, int user);
 122extern void account_steal_ticks(unsigned long ticks);
 123extern void account_idle_ticks(unsigned long ticks);
 124
 125#endif /* _LINUX_KERNEL_STAT_H */
 126