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 #include <asm/cputime.h>
  13
  14 /*
  15  * 'kernel_stat.h' contains the definitions needed for doing
  16  * some kernel statistics (CPU usage, context switches ...),
  17  * used by rstatd/perfmeter
  18  */
  19
  20 enum cpu_usage_stat {
  21         CPUTIME_USER,
  22         CPUTIME_NICE,
  23         CPUTIME_SYSTEM,
  24         CPUTIME_SOFTIRQ,
  25         CPUTIME_IRQ,
  26         CPUTIME_IDLE,
  27         CPUTIME_IOWAIT,
  28         CPUTIME_STEAL,
  29         CPUTIME_GUEST,
  30         CPUTIME_GUEST_NICE,
  31         NR_STATS,
  32 };
  33
  34 struct kernel_cpustat {
  35         u64 cpustat[NR_STATS];
  36 };
  37
  38 struct kernel_stat {
  39         unsigned long irqs_sum;
  40         unsigned int softirqs[NR_SOFTIRQS];
  41 };
  42
  43 DECLARE_PER_CPU(struct kernel_stat, kstat);
  44 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  45
  46 /* Must have preemption disabled for this to be meaningful. */
  47 #define kstat_this_cpu (&__get_cpu_var(kstat))
  48 #define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
  49 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
  50 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  51
  52 extern unsigned long long nr_context_switches(void);
  53
  54 #include <linux/irq.h>
  55 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  56
  57 #define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  58 do {                                                    \
  59         __this_cpu_inc(*(DESC)->kstat_irqs);            \
  60         __this_cpu_inc(kstat.irqs_sum);                 \
  61 } while (0)
  62
  63 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  64 {
  65         __this_cpu_inc(kstat.softirqs[irq]);
  66 }
  67
  68 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  69 {
  70        return kstat_cpu(cpu).softirqs[irq];
  71 }
  72
  73 /*
  74  * Number of interrupts per specific IRQ source, since bootup
  75  */
  76 extern unsigned int kstat_irqs(unsigned int irq);
  77
  78 /*
  79  * Number of interrupts per cpu, since bootup
  80  */
  81 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
  82 {
  83         return kstat_cpu(cpu).irqs_sum;
  84 }
  85
  86 /*
  87  * Lock/unlock the current runqueue - to extract task statistics:
  88  */
  89 extern unsigned long long task_delta_exec(struct task_struct *);
  90
  91 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
  92 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
  93 extern void account_steal_time(cputime_t);
  94 extern void account_idle_time(cputime_t);
  95
  96 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  97 static inline void account_process_tick(struct task_struct *tsk, int user)
  98 {
  99         vtime_account_user(tsk);
 100 }
 101 #else
 102 extern void account_process_tick(struct task_struct *, int user);
 103 #endif
 104
 105 extern void account_steal_ticks(unsigned long ticks);
 106 extern void account_idle_ticks(unsigned long ticks);
 107
 108 #endif /* _LINUX_KERNEL_STAT_H */