include/linux/kernel_stat.h

   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 <asm/irq.h>
   9 #include <asm/cputime.h>
  10
  11 /*
  12  * 'kernel_stat.h' contains the definitions needed for doing
  13  * some kernel statistics (CPU usage, context switches ...),
  14  * used by rstatd/perfmeter
  15  */
  16
  17 struct cpu_usage_stat {
  18         cputime64_t user;
  19         cputime64_t nice;
  20         cputime64_t system;
  21         cputime64_t softirq;
  22         cputime64_t irq;
  23         cputime64_t idle;
  24         cputime64_t iowait;
  25         cputime64_t steal;
  26         cputime64_t guest;
  27 };
  28
  29 struct kernel_stat {
  30         struct cpu_usage_stat   cpustat;
  31         unsigned int irqs[NR_IRQS];
  32 };
  33
  34 DECLARE_PER_CPU(struct kernel_stat, kstat);
  35
  36 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  37 /* Must have preemption disabled for this to be meaningful. */
  38 #define kstat_this_cpu  __get_cpu_var(kstat)
  39
  40 extern unsigned long long nr_context_switches(void);
  41
  42 struct irq_desc;
  43
  44 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  45                                             struct irq_desc *desc)
  46 {
  47         kstat_this_cpu.irqs[irq]++;
  48 }
  49
  50 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  51 {
  52        return kstat_cpu(cpu).irqs[irq];
  53 }
  54
  55 /*
  56  * Number of interrupts per specific IRQ source, since bootup
  57  */
  58 static inline unsigned int kstat_irqs(unsigned int irq)
  59 {
  60         unsigned int sum = 0;
  61         int cpu;
  62
  63         for_each_possible_cpu(cpu)
  64                 sum += kstat_irqs_cpu(irq, cpu);
  65
  66         return sum;
  67 }
  68
  69
  70 /*
  71  * Lock/unlock the current runqueue - to extract task statistics:
  72  */
  73 extern void curr_rq_lock_irq_save(unsigned long *flags);
  74 extern void curr_rq_unlock_irq_restore(unsigned long *flags);
  75 extern unsigned long long __task_delta_exec(struct task_struct *tsk, int update);
  76 extern unsigned long long task_delta_exec(struct task_struct *);
  77
  78 extern void account_user_time(struct task_struct *, cputime_t);
  79 extern void account_user_time_scaled(struct task_struct *, cputime_t);
  80 extern void account_system_time(struct task_struct *, int, cputime_t);
  81 extern void account_system_time_scaled(struct task_struct *, cputime_t);
  82 extern void account_steal_time(struct task_struct *, cputime_t);
  83
  84 #endif /* _LINUX_KERNEL_STAT_H */