include/linux/kernel_stat.h

   1 #ifndef _LINUX_KERNEL_STAT_H
   2 #define _LINUX_KERNEL_STAT_H
   3
   4 #include <linux/config.h>
   5 #include <asm/irq.h>
   6 #include <linux/smp.h>
   7 #include <linux/threads.h>
   8 #include <linux/percpu.h>
   9 #include <linux/cpumask.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
  18 struct 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 };
  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 /*
  43  * Number of interrupts per specific IRQ source, since bootup
  44  */
  45 static inline int kstat_irqs(int irq)
  46 {
  47         int cpu, sum = 0;
  48
  49         for_each_possible_cpu(cpu)
  50                 sum += kstat_cpu(cpu).irqs[irq];
  51
  52         return sum;
  53 }
  54
  55 extern void account_user_time(struct task_struct *, cputime_t);
  56 extern void account_system_time(struct task_struct *, int, cputime_t);
  57 extern void account_steal_time(struct task_struct *, cputime_t);
  58
  59 #endif /* _LINUX_KERNEL_STAT_H */