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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_KERNEL_STAT_H |
| 2 | #define _LINUX_KERNEL_STAT_H |
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| 3 | |||
| 4 | #include <linux/config.h> |
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| 5 | #include <asm/irq.h> |
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| 6 | #include <linux/smp.h> |
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| 7 | #include <linux/threads.h> |
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| 8 | #include <linux/percpu.h> |
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| 9 | |||
| 10 | /* |
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| 11 | * 'kernel_stat.h' contains the definitions needed for doing |
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| 12 | * some kernel statistics (CPU usage, context switches ...), |
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| 13 | * used by rstatd/perfmeter |
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| 14 | */ |
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| 15 | |||
| 16 | struct cpu_usage_stat { |
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| 17 | unsigned int user; |
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| 18 | unsigned int nice; |
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| 19 | unsigned int system; |
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| 20 | unsigned int softirq; |
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| 21 | unsigned int irq; |
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| 22 | unsigned int idle; |
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| 23 | unsigned int iowait; |
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| 24 | }; |
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| 25 | |||
| 26 | struct kernel_stat { |
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| 27 | struct cpu_usage_stat cpustat; |
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| 28 | unsigned int irqs[NR_IRQS]; |
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| 29 | }; |
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| 30 | |||
| 31 | DECLARE_PER_CPU(struct kernel_stat, kstat); |
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| 32 | |||
| 33 | #define kstat_cpu(cpu) per_cpu(kstat, cpu) |
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| 34 | /* Must have preemption disabled for this to be meaningful. */ |
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| 35 | #define kstat_this_cpu __get_cpu_var(kstat) |
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| 36 | |||
| 37 | extern unsigned long nr_context_switches(void); |
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| 38 | |||
| 39 | /* |
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| 40 | * Number of interrupts per specific IRQ source, since bootup |
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| 41 | */ |
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| 42 | static inline int kstat_irqs(int irq) |
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| 43 | { |
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| 44 | int i, sum=0; |
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| 45 | |||
| 46 | for (i = 0; i < NR_CPUS; i++) |
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| 47 | if (cpu_possible(i)) |
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| 48 | sum += kstat_cpu(i).irqs[irq]; |
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| 49 | |||
| 50 | return sum; |
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| 51 | } |
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| 52 | |||
| 53 | #endif /* _LINUX_KERNEL_STAT_H */ |