3292beb340
This patch changes fields in cpustat from a structure, to an u64 array. Math gets easier, and the code is more flexible. Signed-off-by: Glauber Costa <glommer@parallels.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul Tuner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1322498719-2255-2-git-send-email-glommer@parallels.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
#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 <asm/irq.h>
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#include <asm/cputime.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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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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#ifndef CONFIG_GENERIC_HARDIRQS
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unsigned int irqs[NR_IRQS];
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#endif
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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 (&__get_cpu_var(kstat))
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#define kcpustat_this_cpu (&__get_cpu_var(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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#ifndef CONFIG_GENERIC_HARDIRQS
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struct irq_desc;
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static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
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struct irq_desc *desc)
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{
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__this_cpu_inc(kstat.irqs[irq]);
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__this_cpu_inc(kstat.irqs_sum);
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}
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static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
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{
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return kstat_cpu(cpu).irqs[irq];
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}
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#else
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#include <linux/irq.h>
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extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
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#define kstat_incr_irqs_this_cpu(irqno, DESC) \
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do { \
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__this_cpu_inc(*(DESC)->kstat_irqs); \
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__this_cpu_inc(kstat.irqs_sum); \
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} while (0)
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#endif
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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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#ifndef CONFIG_GENERIC_HARDIRQS
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static inline unsigned int kstat_irqs(unsigned int irq)
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{
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unsigned int sum = 0;
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int cpu;
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for_each_possible_cpu(cpu)
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sum += kstat_irqs_cpu(irq, cpu);
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return sum;
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}
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#else
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extern unsigned int kstat_irqs(unsigned int irq);
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#endif
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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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/*
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* Lock/unlock the current runqueue - to extract task statistics:
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*/
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extern unsigned long long task_delta_exec(struct task_struct *);
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extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
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extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
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extern void account_steal_time(cputime_t);
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extern void account_idle_time(cputime_t);
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extern void account_process_tick(struct task_struct *, int user);
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extern void account_steal_ticks(unsigned long ticks);
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extern void account_idle_ticks(unsigned long ticks);
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#endif /* _LINUX_KERNEL_STAT_H */
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