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TOMOYO Linux Cross Reference
Linux/include/linux/kernel_stat.h

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  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_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 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
 81 extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
 82                           enum cpu_usage_stat usage, int cpu);
 83 extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
 84 #else
 85 static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
 86                                  enum cpu_usage_stat usage, int cpu)
 87 {
 88         return kcpustat->cpustat[usage];
 89 }
 90 
 91 static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
 92 {
 93         *dst = kcpustat_cpu(cpu);
 94 }
 95 
 96 #endif
 97 
 98 extern void account_user_time(struct task_struct *, u64);
 99 extern void account_guest_time(struct task_struct *, u64);
100 extern void account_system_time(struct task_struct *, int, u64);
101 extern void account_system_index_time(struct task_struct *, u64,
102                                       enum cpu_usage_stat);
103 extern void account_steal_time(u64);
104 extern void account_idle_time(u64);
105 
106 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
107 static inline void account_process_tick(struct task_struct *tsk, int user)
108 {
109         vtime_flush(tsk);
110 }
111 #else
112 extern void account_process_tick(struct task_struct *, int user);
113 #endif
114 
115 extern void account_idle_ticks(unsigned long ticks);
116 
117 #endif /* _LINUX_KERNEL_STAT_H */
118 

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