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 #ifndef CONFIG_GENERIC_HARDIRQS
  40        unsigned int irqs[NR_IRQS];
  41 #endif
  42         unsigned long irqs_sum;
  43         unsigned int softirqs[NR_SOFTIRQS];
  44 };
  45
  46 DECLARE_PER_CPU(struct kernel_stat, kstat);
  47 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  48
  49 /* Must have preemption disabled for this to be meaningful. */
  50 #define kstat_this_cpu (&__get_cpu_var(kstat))
  51 #define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
  52 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
  53 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  54
  55 extern unsigned long long nr_context_switches(void);
  56
  57 #ifndef CONFIG_GENERIC_HARDIRQS
  58
  59 struct irq_desc;
  60
  61 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  62                                             struct irq_desc *desc)
  63 {
  64         __this_cpu_inc(kstat.irqs[irq]);
  65         __this_cpu_inc(kstat.irqs_sum);
  66 }
  67
  68 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  69 {
  70        return kstat_cpu(cpu).irqs[irq];
  71 }
  72 #else
  73 #include <linux/irq.h>
  74 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  75
  76 #define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  77 do {                                                    \
  78         __this_cpu_inc(*(DESC)->kstat_irqs);            \
  79         __this_cpu_inc(kstat.irqs_sum);                 \
  80 } while (0)
  81
  82 #endif
  83
  84 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  85 {
  86         __this_cpu_inc(kstat.softirqs[irq]);
  87 }
  88
  89 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  90 {
  91        return kstat_cpu(cpu).softirqs[irq];
  92 }
  93
  94 /*
  95  * Number of interrupts per specific IRQ source, since bootup
  96  */
  97 #ifndef CONFIG_GENERIC_HARDIRQS
  98 static inline unsigned int kstat_irqs(unsigned int irq)
  99 {
 100         unsigned int sum = 0;
 101         int cpu;
 102
 103         for_each_possible_cpu(cpu)
 104                 sum += kstat_irqs_cpu(irq, cpu);
 105
 106         return sum;
 107 }
 108 #else
 109 extern unsigned int kstat_irqs(unsigned int irq);
 110 #endif
 111
 112 /*
 113  * Number of interrupts per cpu, since bootup
 114  */
 115 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 116 {
 117         return kstat_cpu(cpu).irqs_sum;
 118 }
 119
 120 /*
 121  * Lock/unlock the current runqueue - to extract task statistics:
 122  */
 123 extern unsigned long long task_delta_exec(struct task_struct *);
 124
 125 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 126 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 127 extern void account_steal_time(cputime_t);
 128 extern void account_idle_time(cputime_t);
 129
 130 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
 131 static inline void account_process_tick(struct task_struct *tsk, int user)
 132 {
 133         vtime_account_user(tsk);
 134 }
 135 #else
 136 extern void account_process_tick(struct task_struct *, int user);
 137 #endif
 138
 139 extern void account_steal_ticks(unsigned long ticks);
 140 extern void account_idle_ticks(unsigned long ticks);
 141
 142 #endif /* _LINUX_KERNEL_STAT_H */