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 <linux/interrupt.h>
   9 #include <linux/sched.h>
  10 #include <linux/vtime.h>
  11 #include <asm/irq.h>
  12
  13 /*
  14  * 'kernel_stat.h' contains the definitions needed for doing
  15  * some kernel statistics (CPU usage, context switches ...),
  16  * used by rstatd/perfmeter
  17  */
  18
  19 enum cpu_usage_stat {
  20         CPUTIME_USER,
  21         CPUTIME_NICE,
  22         CPUTIME_SYSTEM,
  23         CPUTIME_SOFTIRQ,
  24         CPUTIME_IRQ,
  25         CPUTIME_IDLE,
  26         CPUTIME_IOWAIT,
  27         CPUTIME_STEAL,
  28         CPUTIME_GUEST,
  29         CPUTIME_GUEST_NICE,
  30         NR_STATS,
  31 };
  32
  33 struct kernel_cpustat {
  34         u64 cpustat[NR_STATS];
  35 };
  36
  37 struct kernel_stat {
  38         unsigned long irqs_sum;
  39         unsigned int softirqs[NR_SOFTIRQS];
  40 };
  41
  42 DECLARE_PER_CPU(struct kernel_stat, kstat);
  43 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  44
  45 /* Must have preemption disabled for this to be meaningful. */
  46 #define kstat_this_cpu this_cpu_ptr(&kstat)
  47 #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
  48 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
  49 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  50
  51 extern unsigned long long nr_context_switches(void);
  52
  53 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  54 extern void kstat_incr_irq_this_cpu(unsigned int irq);
  55
  56 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  57 {
  58         __this_cpu_inc(kstat.softirqs[irq]);
  59 }
  60
  61 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  62 {
  63        return kstat_cpu(cpu).softirqs[irq];
  64 }
  65
  66 /*
  67  * Number of interrupts per specific IRQ source, since bootup
  68  */
  69 extern unsigned int kstat_irqs(unsigned int irq);
  70 extern unsigned int kstat_irqs_usr(unsigned int irq);
  71
  72 /*
  73  * Number of interrupts per cpu, since bootup
  74  */
  75 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
  76 {
  77         return kstat_cpu(cpu).irqs_sum;
  78 }
  79
  80 extern void account_user_time(struct task_struct *, u64);
  81 extern void account_guest_time(struct task_struct *, u64);
  82 extern void account_system_time(struct task_struct *, int, u64);
  83 extern void account_system_index_time(struct task_struct *, u64,
  84                                       enum cpu_usage_stat);
  85 extern void account_steal_time(u64);
  86 extern void account_idle_time(u64);
  87
  88 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  89 static inline void account_process_tick(struct task_struct *tsk, int user)
  90 {
  91         vtime_flush(tsk);
  92 }
  93 #else
  94 extern void account_process_tick(struct task_struct *, int user);
  95 #endif
  96
  97 extern void account_idle_ticks(unsigned long ticks);
  98
  99 #endif /* _LINUX_KERNEL_STAT_H */