include/linux/kernel_stat.h

   1 #ifndef _LINUX_KERNEL_STAT_H
   2 #define _LINUX_KERNEL_STAT_H
   3
   4 #include <asm/irq.h>
   5 #include <linux/smp.h>
   6 #include <linux/threads.h>
   7 #include <linux/percpu.h>
   8 #include <linux/cpumask.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 };
  27
  28 struct kernel_stat {
  29         struct cpu_usage_stat   cpustat;
  30         unsigned int irqs[NR_IRQS];
  31 };
  32
  33 DECLARE_PER_CPU(struct kernel_stat, kstat);
  34
  35 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  36 /* Must have preemption disabled for this to be meaningful. */
  37 #define kstat_this_cpu  __get_cpu_var(kstat)
  38
  39 extern unsigned long long nr_context_switches(void);
  40
  41 /*
  42  * Number of interrupts per specific IRQ source, since bootup
  43  */
  44 static inline int kstat_irqs(int irq)
  45 {
  46         int cpu, sum = 0;
  47
  48         for_each_possible_cpu(cpu)
  49                 sum += kstat_cpu(cpu).irqs[irq];
  50
  51         return sum;
  52 }
  53
  54 extern void account_user_time(struct task_struct *, cputime_t);
  55 extern void account_system_time(struct task_struct *, int, cputime_t);
  56 extern void account_steal_time(struct task_struct *, cputime_t);
  57
  58 #endif /* _LINUX_KERNEL_STAT_H */