1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_KERNEL_STAT_H 3 #define _LINUX_KERNEL_STAT_H 4 5 #include <linux/smp.h> 6 #include <linux/threads.h> 7 #include <linux/percpu.h> 8 #include <linux/cpumask.h> 9 #include <linux/interrupt.h> 10 #include <linux/sched.h> 11 #include <linux/vtime.h> 12 #include <asm/irq.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 this_cpu_ptr(&kstat) 48 #define kcpustat_this_cpu this_cpu_ptr(&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 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); 55 extern void kstat_incr_irq_this_cpu(unsigned int irq); 56 57 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq) 58 { 59 __this_cpu_inc(kstat.softirqs[irq]); 60 } 61 62 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu) 63 { 64 return kstat_cpu(cpu).softirqs[irq]; 65 } 66 67 /* 68 * Number of interrupts per specific IRQ source, since bootup 69 */ 70 extern unsigned int kstat_irqs(unsigned int irq); 71 extern unsigned int kstat_irqs_usr(unsigned int irq); 72 73 /* 74 * Number of interrupts per cpu, since bootup 75 */ 76 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu) 77 { 78 return kstat_cpu(cpu).irqs_sum; 79 } 80 81 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 82 extern u64 kcpustat_field(struct kernel_cpustat *kcpustat, 83 enum cpu_usage_stat usage, int cpu); 84 extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu); 85 #else 86 static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat, 87 enum cpu_usage_stat usage, int cpu) 88 { 89 return kcpustat->cpustat[usage]; 90 } 91 92 static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu) 93 { 94 *dst = kcpustat_cpu(cpu); 95 } 96 97 #endif 98 99 extern void account_user_time(struct task_struct *, u64); 100 extern void account_guest_time(struct task_struct *, u64); 101 extern void account_system_time(struct task_struct *, int, u64); 102 extern void account_system_index_time(struct task_struct *, u64, 103 enum cpu_usage_stat); 104 extern void account_steal_time(u64); 105 extern void account_idle_time(u64); 106 107 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 108 static inline void account_process_tick(struct task_struct *tsk, int user) 109 { 110 vtime_flush(tsk); 111 } 112 #else 113 extern void account_process_tick(struct task_struct *, int user); 114 #endif 115 116 extern void account_idle_ticks(unsigned long ticks); 117 118 #endif /* _LINUX_KERNEL_STAT_H */ 119