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1fcf54deb7
4feee7d126 previously added per-task forced idle accounting. This patch
extends this to also include cgroups.
rstat is used for cgroup accounting, except for the root, which uses
kcpustat in order to bypass the need for doing an rstat flush when
reading root stats.
Only cgroup v2 is supported. Similar to the task accounting, the cgroup
accounting requires that schedstats is enabled.
Signed-off-by: Josh Don <joshdon@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lkml.kernel.org/r/20220629211426.3329954-1-joshdon@google.com
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_KERNEL_STAT_H
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#define _LINUX_KERNEL_STAT_H
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#include <linux/smp.h>
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#include <linux/threads.h>
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#include <linux/percpu.h>
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#include <linux/cpumask.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/vtime.h>
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#include <asm/irq.h>
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/*
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* 'kernel_stat.h' contains the definitions needed for doing
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* some kernel statistics (CPU usage, context switches ...),
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* used by rstatd/perfmeter
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*/
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enum cpu_usage_stat {
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CPUTIME_USER,
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CPUTIME_NICE,
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CPUTIME_SYSTEM,
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CPUTIME_SOFTIRQ,
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CPUTIME_IRQ,
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CPUTIME_IDLE,
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CPUTIME_IOWAIT,
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CPUTIME_STEAL,
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CPUTIME_GUEST,
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CPUTIME_GUEST_NICE,
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#ifdef CONFIG_SCHED_CORE
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CPUTIME_FORCEIDLE,
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#endif
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NR_STATS,
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};
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struct kernel_cpustat {
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u64 cpustat[NR_STATS];
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};
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struct kernel_stat {
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unsigned long irqs_sum;
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unsigned int softirqs[NR_SOFTIRQS];
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};
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DECLARE_PER_CPU(struct kernel_stat, kstat);
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DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
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/* Must have preemption disabled for this to be meaningful. */
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#define kstat_this_cpu this_cpu_ptr(&kstat)
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#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
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#define kstat_cpu(cpu) per_cpu(kstat, cpu)
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#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
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extern unsigned long long nr_context_switches(void);
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extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
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extern void kstat_incr_irq_this_cpu(unsigned int irq);
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static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
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{
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__this_cpu_inc(kstat.softirqs[irq]);
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}
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static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
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{
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return kstat_cpu(cpu).softirqs[irq];
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}
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/*
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* Number of interrupts per specific IRQ source, since bootup
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*/
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extern unsigned int kstat_irqs_usr(unsigned int irq);
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/*
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* Number of interrupts per cpu, since bootup
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*/
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static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
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{
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return kstat_cpu(cpu).irqs_sum;
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}
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
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extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
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enum cpu_usage_stat usage, int cpu);
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extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
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#else
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static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
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enum cpu_usage_stat usage, int cpu)
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{
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return kcpustat->cpustat[usage];
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}
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static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
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{
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*dst = kcpustat_cpu(cpu);
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}
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#endif
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extern void account_user_time(struct task_struct *, u64);
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extern void account_guest_time(struct task_struct *, u64);
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extern void account_system_time(struct task_struct *, int, u64);
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extern void account_system_index_time(struct task_struct *, u64,
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enum cpu_usage_stat);
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extern void account_steal_time(u64);
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extern void account_idle_time(u64);
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extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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static inline void account_process_tick(struct task_struct *tsk, int user)
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{
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vtime_flush(tsk);
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}
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#else
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extern void account_process_tick(struct task_struct *, int user);
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#endif
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extern void account_idle_ticks(unsigned long ticks);
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#ifdef CONFIG_SCHED_CORE
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extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
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#endif
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#endif /* _LINUX_KERNEL_STAT_H */
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