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 <asm/irq.h>
  11 #include <asm/cputime.h>
  12
  13 /*
  14  * 'kernel_stat.h' contains the definitions needed for doing
  15  * some kernel statistics (CPU usage, context switches ...),
  16  * used by rstatd/perfmeter
  17  */
  18
  19 enum cpu_usage_stat {
  20         CPUTIME_USER,
  21         CPUTIME_NICE,
  22         CPUTIME_SYSTEM,
  23         CPUTIME_SOFTIRQ,
  24         CPUTIME_IRQ,
  25         CPUTIME_IDLE,
  26         CPUTIME_IOWAIT,
  27         CPUTIME_STEAL,
  28         CPUTIME_GUEST,
  29         CPUTIME_GUEST_NICE,
  30         NR_STATS,
  31 };
  32
  33 struct kernel_cpustat {
  34         u64 cpustat[NR_STATS];
  35 };
  36
  37 struct kernel_stat {
  38 #ifndef CONFIG_GENERIC_HARDIRQS
  39        unsigned int irqs[NR_IRQS];
  40 #endif
  41         unsigned long irqs_sum;
  42         unsigned int softirqs[NR_SOFTIRQS];
  43 };
  44
  45 DECLARE_PER_CPU(struct kernel_stat, kstat);
  46 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
  47
  48 /* Must have preemption disabled for this to be meaningful. */
  49 #define kstat_this_cpu (&__get_cpu_var(kstat))
  50 #define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
  51 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
  52 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
  53
  54 extern unsigned long long nr_context_switches(void);
  55
  56 #ifndef CONFIG_GENERIC_HARDIRQS
  57
  58 struct irq_desc;
  59
  60 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  61                                             struct irq_desc *desc)
  62 {
  63         __this_cpu_inc(kstat.irqs[irq]);
  64         __this_cpu_inc(kstat.irqs_sum);
  65 }
  66
  67 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  68 {
  69        return kstat_cpu(cpu).irqs[irq];
  70 }
  71 #else
  72 #include <linux/irq.h>
  73 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  74
  75 #define kstat_incr_irqs_this_cpu(irqno, DESC)           \
  76 do {                                                    \
  77         __this_cpu_inc(*(DESC)->kstat_irqs);            \
  78         __this_cpu_inc(kstat.irqs_sum);                 \
  79 } while (0)
  80
  81 #endif
  82
  83 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  84 {
  85         __this_cpu_inc(kstat.softirqs[irq]);
  86 }
  87
  88 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  89 {
  90        return kstat_cpu(cpu).softirqs[irq];
  91 }
  92
  93 /*
  94  * Number of interrupts per specific IRQ source, since bootup
  95  */
  96 #ifndef CONFIG_GENERIC_HARDIRQS
  97 static inline unsigned int kstat_irqs(unsigned int irq)
  98 {
  99         unsigned int sum = 0;
 100         int cpu;
 101
 102         for_each_possible_cpu(cpu)
 103                 sum += kstat_irqs_cpu(irq, cpu);
 104
 105         return sum;
 106 }
 107 #else
 108 extern unsigned int kstat_irqs(unsigned int irq);
 109 #endif
 110
 111 /*
 112  * Number of interrupts per cpu, since bootup
 113  */
 114 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 115 {
 116         return kstat_cpu(cpu).irqs_sum;
 117 }
 118
 119 /*
 120  * Lock/unlock the current runqueue - to extract task statistics:
 121  */
 122 extern unsigned long long task_delta_exec(struct task_struct *);
 123
 124 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 125 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 126 extern void account_steal_time(cputime_t);
 127 extern void account_idle_time(cputime_t);
 128
 129 extern void account_process_tick(struct task_struct *, int user);
 130 extern void account_steal_ticks(unsigned long ticks);
 131 extern void account_idle_ticks(unsigned long ticks);
 132
 133 #endif /* _LINUX_KERNEL_STAT_H */