Line data    Source code

       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         185 :         __this_cpu_inc(kstat.softirqs[irq]);
      60             : }
      61             : 
      62             : static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
      63             : {
      64           0 :        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           0 :         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           0 :         *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             : extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
     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 */