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 <asm/irq.h>
  10 #include <asm/cputime.h>
  11
  12 /*
  13  * 'kernel_stat.h' contains the definitions needed for doing
  14  * some kernel statistics (CPU usage, context switches ...),
  15  * used by rstatd/perfmeter
  16  */
  17
  18 struct cpu_usage_stat {
  19         cputime64_t user;
  20         cputime64_t nice;
  21         cputime64_t system;
  22         cputime64_t softirq;
  23         cputime64_t irq;
  24         cputime64_t idle;
  25         cputime64_t iowait;
  26         cputime64_t steal;
  27         cputime64_t guest;
  28 };
  29
  30 struct kernel_stat {
  31         struct cpu_usage_stat   cpustat;
  32 #ifndef CONFIG_GENERIC_HARDIRQS
  33        unsigned int irqs[NR_IRQS];
  34 #endif
  35         unsigned int softirqs[NR_SOFTIRQS];
  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 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  73 {
  74         kstat_this_cpu.softirqs[irq]++;
  75 }
  76
  77 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  78 {
  79        return kstat_cpu(cpu).softirqs[irq];
  80 }
  81
  82 /*
  83  * Number of interrupts per specific IRQ source, since bootup
  84  */
  85 static inline unsigned int kstat_irqs(unsigned int irq)
  86 {
  87         unsigned int sum = 0;
  88         int cpu;
  89
  90         for_each_possible_cpu(cpu)
  91                 sum += kstat_irqs_cpu(irq, cpu);
  92
  93         return sum;
  94 }
  95
  96
  97 /*
  98  * Lock/unlock the current runqueue - to extract task statistics:
  99  */
 100 extern unsigned long long task_delta_exec(struct task_struct *);
 101
 102 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 103 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 104 extern void account_steal_time(cputime_t);
 105 extern void account_idle_time(cputime_t);
 106
 107 extern void account_process_tick(struct task_struct *, int user);
 108 extern void account_steal_ticks(unsigned long ticks);
 109 extern void account_idle_ticks(unsigned long ticks);
 110
 111 #endif /* _LINUX_KERNEL_STAT_H */