forked from Minki/linux
c66f08be7e
This adds items to the taststats struct to account for user and system time based on scaling the CPU frequency and instruction issue rates. Adds account_(user|system)_time_scaled callbacks which architectures can use to account for time using this mechanism. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#ifndef _LINUX_KERNEL_STAT_H
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#define _LINUX_KERNEL_STAT_H
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#include <asm/irq.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 <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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struct cpu_usage_stat {
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cputime64_t user;
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cputime64_t nice;
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cputime64_t system;
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cputime64_t softirq;
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cputime64_t irq;
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cputime64_t idle;
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cputime64_t iowait;
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cputime64_t steal;
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cputime64_t guest;
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};
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struct kernel_stat {
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struct cpu_usage_stat cpustat;
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unsigned int irqs[NR_IRQS];
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};
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DECLARE_PER_CPU(struct kernel_stat, kstat);
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#define kstat_cpu(cpu) per_cpu(kstat, cpu)
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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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extern unsigned long long nr_context_switches(void);
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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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static inline int kstat_irqs(int irq)
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{
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int cpu, sum = 0;
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for_each_possible_cpu(cpu)
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sum += kstat_cpu(cpu).irqs[irq];
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return sum;
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}
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extern void account_user_time(struct task_struct *, cputime_t);
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extern void account_user_time_scaled(struct task_struct *, cputime_t);
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extern void account_system_time(struct task_struct *, int, cputime_t);
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extern void account_system_time_scaled(struct task_struct *, cputime_t);
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extern void account_steal_time(struct task_struct *, cputime_t);
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#endif /* _LINUX_KERNEL_STAT_H */
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