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 user_rt;
  27         cputime64_t system_rt;
  28         cputime64_t guest;
  29 };
  30
  31 struct kernel_stat {
  32         struct cpu_usage_stat   cpustat;
  33 #ifndef CONFIG_GENERIC_HARDIRQS
  34        unsigned int irqs[NR_IRQS];
  35 #endif
  36 };
  37
  38 DECLARE_PER_CPU(struct kernel_stat, kstat);
  39
  40 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  41 /* Must have preemption disabled for this to be meaningful. */
  42 #define kstat_this_cpu  __get_cpu_var(kstat)
  43
  44 extern unsigned long long nr_context_switches(void);
  45
  46 #ifndef CONFIG_GENERIC_HARDIRQS
  47 #define kstat_irqs_this_cpu(irq) \
  48         (kstat_this_cpu.irqs[irq])
  49
  50 struct irq_desc;
  51
  52 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  53                                             struct irq_desc *desc)
  54 {
  55         kstat_this_cpu.irqs[irq]++;
  56 }
  57
  58 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  59 {
  60        return kstat_cpu(cpu).irqs[irq];
  61 }
  62 #else
  63 #include <linux/irq.h>
  64 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  65 #define kstat_irqs_this_cpu(DESC) \
  66         ((DESC)->kstat_irqs[smp_processor_id()])
  67 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
  68         ((DESC)->kstat_irqs[smp_processor_id()]++)
  69
  70 #endif
  71
  72 /*
  73  * Number of interrupts per specific IRQ source, since bootup
  74  */
  75 static inline unsigned int kstat_irqs(unsigned int irq)
  76 {
  77         unsigned int sum = 0;
  78         int cpu;
  79
  80         for_each_possible_cpu(cpu)
  81                 sum += kstat_irqs_cpu(irq, cpu);
  82
  83         return sum;
  84 }
  85
  86
  87 /*
  88  * Lock/unlock the current runqueue - to extract task statistics:
  89  */
  90 extern void curr_rq_lock_irq_save(unsigned long *flags);
  91 extern void curr_rq_unlock_irq_restore(unsigned long *flags);
  92 extern unsigned long long __task_delta_exec(struct task_struct *tsk, int update);
  93 extern unsigned long long task_delta_exec(struct task_struct *);
  94
  95 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
  96 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
  97 extern void account_steal_time(cputime_t);
  98 extern void account_idle_time(cputime_t);
  99
 100 extern void account_process_tick(struct task_struct *, int user);
 101 extern void account_steal_ticks(unsigned long ticks);
 102 extern void account_idle_ticks(unsigned long ticks);
 103
 104 #endif /* _LINUX_KERNEL_STAT_H */