release/src-rt-6.x.4708/linux/linux-2.6.36/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 int softirqs[NR_SOFTIRQS];
  37 };
  38
  39 DECLARE_PER_CPU(struct kernel_stat, kstat);
  40
  41 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  42 /* Must have preemption disabled for this to be meaningful. */
  43 #define kstat_this_cpu  __get_cpu_var(kstat)
  44
  45 extern unsigned long long nr_context_switches(void);
  46
  47 #ifndef CONFIG_GENERIC_HARDIRQS
  48 #define kstat_irqs_this_cpu(irq) \
  49         (kstat_this_cpu.irqs[irq])
  50
  51 struct irq_desc;
  52
  53 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  54                                             struct irq_desc *desc)
  55 {
  56         kstat_this_cpu.irqs[irq]++;
  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 #define kstat_irqs_this_cpu(DESC) \
  67         ((DESC)->kstat_irqs[smp_processor_id()])
  68 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
  69         ((DESC)->kstat_irqs[smp_processor_id()]++)
  70
  71 #endif
  72
  73 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  74 {
  75         kstat_this_cpu.softirqs[irq]++;
  76 }
  77
  78 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  79 {
  80        return kstat_cpu(cpu).softirqs[irq];
  81 }
  82
  83 /*
  84  * Number of interrupts per specific IRQ source, since bootup
  85  */
  86 static inline unsigned int kstat_irqs(unsigned int irq)
  87 {
  88         unsigned int sum = 0;
  89         int cpu;
  90
  91         for_each_possible_cpu(cpu)
  92                 sum += kstat_irqs_cpu(irq, cpu);
  93
  94         return sum;
  95 }
  96
  97
  98 /*
  99  * Lock/unlock the current runqueue - to extract task statistics:
 100  */
 101 extern unsigned long long task_delta_exec(struct task_struct *);
 102
 103 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 104 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 105 extern void account_steal_time(cputime_t);
 106 extern void account_idle_time(cputime_t);
 107
 108 extern void account_process_tick(struct task_struct *, int user);
 109 extern void account_steal_ticks(unsigned long ticks);
 110 extern void account_idle_ticks(unsigned long ticks);
 111
 112 #endif /* _LINUX_KERNEL_STAT_H */