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             : #ifdef CONFIG_SCHED_CORE
      32             :         CPUTIME_FORCEIDLE,
      33             : #endif
      34             :         NR_STATS,
      35             : };
      36             : 
      37             : struct kernel_cpustat {
      38             :         u64 cpustat[NR_STATS];
      39             : };
      40             : 
      41             : struct kernel_stat {
      42             :         unsigned long irqs_sum;
      43             :         unsigned int softirqs[NR_SOFTIRQS];
      44             : };
      45             : 
      46             : DECLARE_PER_CPU(struct kernel_stat, kstat);
      47             : DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
      48             : 
      49             : /* Must have preemption disabled for this to be meaningful. */
      50             : #define kstat_this_cpu this_cpu_ptr(&kstat)
      51             : #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
      52             : #define kstat_cpu(cpu) per_cpu(kstat, cpu)
      53             : #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
      54             : 
      55             : extern unsigned long long nr_context_switches_cpu(int cpu);
      56             : extern unsigned long long nr_context_switches(void);
      57             : 
      58             : extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
      59             : extern void kstat_incr_irq_this_cpu(unsigned int irq);
      60             : 
      61             : static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
      62             : {
      63         321 :         __this_cpu_inc(kstat.softirqs[irq]);
      64             : }
      65             : 
      66             : static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
      67             : {
      68           0 :        return kstat_cpu(cpu).softirqs[irq];
      69             : }
      70             : 
      71             : static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
      72             : {
      73             :         int i;
      74             :         unsigned int sum = 0;
      75             : 
      76             :         for (i = 0; i < NR_SOFTIRQS; i++)
      77             :                 sum += kstat_softirqs_cpu(i, cpu);
      78             : 
      79             :         return sum;
      80             : }
      81             : 
      82             : /*
      83             :  * Number of interrupts per specific IRQ source, since bootup
      84             :  */
      85             : extern unsigned int kstat_irqs_usr(unsigned int irq);
      86             : 
      87             : /*
      88             :  * Number of interrupts per cpu, since bootup
      89             :  */
      90             : static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
      91             : {
      92           0 :         return kstat_cpu(cpu).irqs_sum;
      93             : }
      94             : 
      95             : #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
      96             : extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
      97             :                           enum cpu_usage_stat usage, int cpu);
      98             : extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
      99             : #else
     100             : static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
     101             :                                  enum cpu_usage_stat usage, int cpu)
     102             : {
     103             :         return kcpustat->cpustat[usage];
     104             : }
     105             : 
     106             : static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
     107             : {
     108           0 :         *dst = kcpustat_cpu(cpu);
     109             : }
     110             : 
     111             : #endif
     112             : 
     113             : extern void account_user_time(struct task_struct *, u64);
     114             : extern void account_guest_time(struct task_struct *, u64);
     115             : extern void account_system_time(struct task_struct *, int, u64);
     116             : extern void account_system_index_time(struct task_struct *, u64,
     117             :                                       enum cpu_usage_stat);
     118             : extern void account_steal_time(u64);
     119             : extern void account_idle_time(u64);
     120             : extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
     121             : 
     122             : #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
     123             : static inline void account_process_tick(struct task_struct *tsk, int user)
     124             : {
     125             :         vtime_flush(tsk);
     126             : }
     127             : #else
     128             : extern void account_process_tick(struct task_struct *, int user);
     129             : #endif
     130             : 
     131             : extern void account_idle_ticks(unsigned long ticks);
     132             : 
     133             : #ifdef CONFIG_SCHED_CORE
     134             : extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
     135             : #endif
     136             : 
     137             : #endif /* _LINUX_KERNEL_STAT_H */