1 #ifndef _LINUX_KERNEL_STAT_H 2 #define _LINUX_KERNEL_STAT_H 3 4 #include <asm/irq.h> 5 #include <linux/smp.h> 6 #include <linux/threads.h> 7 #include <linux/percpu.h> 8 #include <linux/cpumask.h> 9 #include <asm/cputime.h> 10 11 /* 12 * 'kernel_stat.h' contains the definitions needed for doing 13 * some kernel statistics (CPU usage, context switches ...), 14 * used by rstatd/perfmeter 15 */ 16 17 struct cpu_usage_stat { 18 cputime64_t user; 19 cputime64_t nice; 20 cputime64_t system; 21 cputime64_t softirq; 22 cputime64_t irq; 23 cputime64_t idle; 24 cputime64_t iowait; 25 cputime64_t steal; 26 cputime64_t guest; 27 }; 28 29 struct kernel_stat { 30 struct cpu_usage_stat cpustat; 31 unsigned int irqs[NR_IRQS]; 32 }; 33 34 DECLARE_PER_CPU(struct kernel_stat, kstat); 35 36 #define kstat_cpu(cpu) per_cpu(kstat, cpu) 37 /* Must have preemption disabled for this to be meaningful. */ 38 #define kstat_this_cpu __get_cpu_var(kstat) 39 40 extern unsigned long long nr_context_switches(void); 41 42 /* 43 * Number of interrupts per specific IRQ source, since bootup 44 */ 45 static inline int kstat_irqs(int irq) 46 { 47 int cpu, sum = 0; 48 49 for_each_possible_cpu(cpu) 50 sum += kstat_cpu(cpu).irqs[irq]; 51 52 return sum; 53 } 54 55 extern void account_user_time(struct task_struct *, cputime_t); 56 extern void account_system_time(struct task_struct *, int, cputime_t); 57 extern void account_steal_time(struct task_struct *, cputime_t); 58 59 #endif /* _LINUX_KERNEL_STAT_H */ 60