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powerpc: Add timer, performance monitor and machine check counts to /proc/interrupts

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With NO_HZ it is useful to know how often the decrementer is going off. The
patch below adds an entry for it and also adds it into the /proc/stat
summaries.

While here, I added performance monitoring and machine check exceptions.
I found it useful to keep an eye on the PMU exception rate
when using the perf tool. Since it's possible to take a completely
handled machine check on a System p box it also sounds like a good idea to
keep a machine check summary.

The event naming matches x86 to keep gratuitous differences to a minimum.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard
2010-01-31 20:34:06 +00:00
committed by Benjamin Herrenschmidt
parent fc380c0c8a
commit 89713ed108
4 changed files with 50 additions and 0 deletions
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9
arch/powerpc/include/asm/hardirq.h
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@ -6,6 +6,9 @@
typedef struct {
unsigned int __softirq_pending;
unsigned int timer_irqs;
unsigned int pmu_irqs;
unsigned int mce_exceptions;
} ____cacheline_aligned irq_cpustat_t;
DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
@ -19,4 +22,10 @@ static inline void ack_bad_irq(unsigned int irq)
printk(KERN_CRIT "unexpected IRQ trap at vector %02x\n", irq);
}
extern u64 arch_irq_stat_cpu(unsigned int cpu);
#define arch_irq_stat_cpu arch_irq_stat_cpu
extern u64 arch_irq_stat(void);
#define arch_irq_stat arch_irq_stat
#endif /* _ASM_POWERPC_HARDIRQ_H */