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         cputime64_t guest_nice;
  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         unsigned long irqs_sum;
  37         unsigned int softirqs[NR_SOFTIRQS];
  38 };
  39
  40 DECLARE_PER_CPU(struct kernel_stat, kstat);
  41
  42 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  43 /* Must have preemption disabled for this to be meaningful. */
  44 #define kstat_this_cpu  __get_cpu_var(kstat)
  45
  46 extern unsigned long long nr_context_switches(void);
  47
  48 #ifndef CONFIG_GENERIC_HARDIRQS
  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         __this_cpu_inc(kstat.irqs[irq]);
  56         __this_cpu_inc(kstat.irqs_sum);
  57 }
  58
  59 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  60 {
  61        return kstat_cpu(cpu).irqs[irq];
  62 }
  63 #else
  64 #include <linux/irq.h>
  65 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  66
  67 #define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  68 do {                                                    \
  69         __this_cpu_inc(*(DESC)->kstat_irqs);            \
  70         __this_cpu_inc(kstat.irqs_sum);                 \
  71 } while (0)
  72
  73 #endif
  74
  75 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  76 {
  77         __this_cpu_inc(kstat.softirqs[irq]);
  78 }
  79
  80 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  81 {
  82        return kstat_cpu(cpu).softirqs[irq];
  83 }
  84
  85 /*
  86  * Number of interrupts per specific IRQ source, since bootup
  87  */
  88 #ifndef CONFIG_GENERIC_HARDIRQS
  89 static inline unsigned int kstat_irqs(unsigned int irq)
  90 {
  91         unsigned int sum = 0;
  92         int cpu;
  93
  94         for_each_possible_cpu(cpu)
  95                 sum += kstat_irqs_cpu(irq, cpu);
  96
  97         return sum;
  98 }
  99 #else
 100 extern unsigned int kstat_irqs(unsigned int irq);
 101 #endif
 102
 103 /*
 104  * Number of interrupts per cpu, since bootup
 105  */
 106 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 107 {
 108         return kstat_cpu(cpu).irqs_sum;
 109 }
 110
 111 /*
 112  * Lock/unlock the current runqueue - to extract task statistics:
 113  */
 114 extern unsigned long long task_delta_exec(struct task_struct *);
 115
 116 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 117 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 118 extern void account_steal_time(cputime_t);
 119 extern void account_idle_time(cputime_t);
 120
 121 extern void account_process_tick(struct task_struct *, int user);
 122 extern void account_steal_ticks(unsigned long ticks);
 123 extern void account_idle_ticks(unsigned long ticks);
 124
 125 #endif /* _LINUX_KERNEL_STAT_H */