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