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 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 unsigned long irqs_sum; 39 unsigned int softirqs[NR_SOFTIRQS]; 40 }; 41 42 DECLARE_PER_CPU(struct kernel_stat, kstat); 43 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat); 44 45 /* Must have preemption disabled for this to be meaningful. */ 46 #define kstat_this_cpu this_cpu_ptr(&kstat) 47 #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat) 48 #define kstat_cpu(cpu) per_cpu(kstat, cpu) 49 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu) 50 51 extern unsigned long long nr_context_switches(void); 52 53 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); 54 extern void kstat_incr_irq_this_cpu(unsigned int irq); 55 56 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq) 57 { 58 __this_cpu_inc(kstat.softirqs[irq]); 59 } 60 61 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu) 62 { 63 return kstat_cpu(cpu).softirqs[irq]; 64 } 65 66 /* 67 * Number of interrupts per specific IRQ source, since bootup 68 */ 69 extern unsigned int kstat_irqs(unsigned int irq); 70 extern unsigned int kstat_irqs_usr(unsigned int irq); 71 72 /* 73 * Number of interrupts per cpu, since bootup 74 */ 75 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu) 76 { 77 return kstat_cpu(cpu).irqs_sum; 78 } 79 80 extern void account_user_time(struct task_struct *, u64); 81 extern void account_guest_time(struct task_struct *, u64); 82 extern void account_system_time(struct task_struct *, int, u64); 83 extern void account_system_index_time(struct task_struct *, u64, 84 enum cpu_usage_stat); 85 extern void account_steal_time(u64); 86 extern void account_idle_time(u64); 87 88 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 89 static inline void account_process_tick(struct task_struct *tsk, int user) 90 { 91 vtime_flush(tsk); 92 } 93 #else 94 extern void account_process_tick(struct task_struct *, int user); 95 #endif 96 97 extern void account_idle_ticks(unsigned long ticks); 98 99 #endif /* _LINUX_KERNEL_STAT_H */ 100