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 #ifndef CONFIG_HAVE_DYN_ARRAY
  32        unsigned int irqs[NR_IRQS];
  33 #endif
  34 };
  35
  36 DECLARE_PER_CPU(struct kernel_stat, kstat);
  37
  38 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  39 /* Must have preemption disabled for this to be meaningful. */
  40 #define kstat_this_cpu  __get_cpu_var(kstat)
  41
  42 extern unsigned long long nr_context_switches(void);
  43
  44 #ifndef CONFIG_HAVE_DYN_ARRAY
  45 #define kstat_irqs_this_cpu(irq) \
  46         (kstat_this_cpu.irqs[irq])
  47 #endif
  48
  49
  50 #ifndef CONFIG_HAVE_DYN_ARRAY
  51 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  52 {
  53        return kstat_cpu(cpu).irqs[irq];
  54 }
  55 #else
  56 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  57 #endif
  58
  59 /*
  60  * Number of interrupts per specific IRQ source, since bootup
  61  */
  62 static inline unsigned int kstat_irqs(unsigned int irq)
  63 {
  64         unsigned int sum = 0;
  65         int cpu;
  66
  67         for_each_possible_cpu(cpu)
  68                 sum += kstat_irqs_cpu(irq, cpu);
  69
  70         return sum;
  71 }
  72
  73 extern void account_user_time(struct task_struct *, cputime_t);
  74 extern void account_user_time_scaled(struct task_struct *, cputime_t);
  75 extern void account_system_time(struct task_struct *, int, cputime_t);
  76 extern void account_system_time_scaled(struct task_struct *, cputime_t);
  77 extern void account_steal_time(struct task_struct *, cputime_t);
  78
  79 #endif /* _LINUX_KERNEL_STAT_H */