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| author | Anton Blanchard <anton@samba.org> | 2010-01-31 20:34:06 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-02-17 14:02:49 +1100 |
| commit | 89713ed10815401a1bfe12e3a076b64048381b56 (patch) | |
| tree | 2d9ce51782997e3ed265dbee7c72c3e7b0c776e3 /arch/powerpc/kernel/time.c | |
| parent | fc380c0c8a17bc2bd2d9d7fb41d4a88c3e618db2 (diff) | |
| download | lwn-89713ed10815401a1bfe12e3a076b64048381b56.tar.gz lwn-89713ed10815401a1bfe12e3a076b64048381b56.zip | |
powerpc: Add timer, performance monitor and machine check counts to /proc/interrupts
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>
Diffstat (limited to 'arch/powerpc/kernel/time.c')
| -rw-r--r-- | arch/powerpc/kernel/time.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index ed1c0f58344a..1b16b9a3e49a 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -575,6 +575,8 @@ void timer_interrupt(struct pt_regs * regs) trace_timer_interrupt_entry(regs); + __get_cpu_var(irq_stat).timer_irqs++; + /* Ensure a positive value is written to the decrementer, or else * some CPUs will continuue to take decrementer exceptions */ set_dec(DECREMENTER_MAX); |