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/interrupt.h>
9 #include <linux/sched.h>
10 #include <linux/vtime.h>
11 #include <asm/irq.h>
12
13 /*
14 * 'kernel_stat.h' contains the definitions needed for doing
15 * some kernel statistics (CPU usage, context switches ...),
16 * used by rstatd/perfmeter
17 */
18
19 enum cpu_usage_stat {
20 CPUTIME_USER,
21 CPUTIME_NICE,
22 CPUTIME_SYSTEM,
23 CPUTIME_SOFTIRQ,
24 CPUTIME_IRQ,
25 CPUTIME_IDLE,
26 CPUTIME_IOWAIT,
27 CPUTIME_STEAL,
28 CPUTIME_GUEST,
29 CPUTIME_GUEST_NICE,
30 #ifdef CONFIG_SCHED_CORE
31 CPUTIME_FORCEIDLE,
32 #endif
33 NR_STATS,
34 };
35
36 struct kernel_cpustat {
37 u64 cpustat[NR_STATS];
38 };
39
40 struct kernel_stat {
41 unsigned long irqs_sum;
42 unsigned int softirqs[NR_SOFTIRQS];
43 };
44
45 DECLARE_PER_CPU(struct kernel_stat, kstat);
46 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
47
48 /* Must have preemption disabled for this to be meaningful. */
49 #define kstat_this_cpu this_cpu_ptr(&kstat)
50 #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
51 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
52 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
53
54 extern unsigned long long nr_context_switches_cpu(int cpu);
55 extern unsigned long long nr_context_switches(void);
56
57 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
58 extern void kstat_incr_irq_this_cpu(unsigned int irq);
59
60 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
61 {
62 __this_cpu_inc(kstat.softirqs[irq]);
63 }
64
65 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
66 {
67 return kstat_cpu(cpu).softirqs[irq];
68 }
69
70 static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
71 {
72 int i;
73 unsigned int sum = 0;
74
75 for (i = 0; i < NR_SOFTIRQS; i++)
76 sum += kstat_softirqs_cpu(i, cpu);
77
78 return sum;
79 }
80
81 #ifdef CONFIG_GENERIC_IRQ_STAT_SNAPSHOT
82 extern void kstat_snapshot_irqs(void);
83 extern unsigned int kstat_get_irq_since_snapshot(unsigned int irq);
84 #else
85 static inline void kstat_snapshot_irqs(void) { }
86 static inline unsigned int kstat_get_irq_since_snapshot(unsigned int irq) { return 0; }
87 #endif
88
89 /*
90 * Number of interrupts per specific IRQ source, since bootup
91 */
92 extern unsigned int kstat_irqs_usr(unsigned int irq);
93
94 /*
95 * Number of interrupts per cpu, since bootup
96 */
97 static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
98 {
99 return kstat_cpu(cpu).irqs_sum;
100 }
101
102 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
103 extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
104 enum cpu_usage_stat usage, int cpu);
105 extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
106 #else
107 static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
108 enum cpu_usage_stat usage, int cpu)
109 {
110 return kcpustat->cpustat[usage];
111 }
112
113 static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
114 {
115 *dst = kcpustat_cpu(cpu);
116 }
117
118 #endif
119
120 extern void account_user_time(struct task_struct *, u64);
121 extern void account_guest_time(struct task_struct *, u64);
122 extern void account_system_time(struct task_struct *, int, u64);
123 extern void account_system_index_time(struct task_struct *, u64,
124 enum cpu_usage_stat);
125 extern void account_steal_time(u64);
126 extern void account_idle_time(u64);
127 extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
128
129 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
130 static inline void account_process_tick(struct task_struct *tsk, int user)
131 {
132 vtime_flush(tsk);
133 }
134 #else
135 extern void account_process_tick(struct task_struct *, int user);
136 #endif
137
138 extern void account_idle_ticks(unsigned long ticks);
139
140 #ifdef CONFIG_SCHED_CORE
141 extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
142 #endif
143
144 #endif /* _LINUX_KERNEL_STAT_H */
145
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