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Commit a6ffebce authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

hrtimer: Make the statistics fields smaller 



No point in having usigned long for /proc/timer_list statistics. Make
them unsigned int.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203500.959773467@linutronix.de


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 056a3cac

include/linux/hrtimer.h

+4 −4
Original line number Diff line number Diff line
@@ -187,10 +187,10 @@ struct hrtimer_cpu_base { 
	int				in_hrtirq;

	int				hres_active;

	int				hang_detected;

	unsigned long			nr_events;

	unsigned long			nr_retries;

	unsigned long			nr_hangs;

	ktime_t				max_hang_time;

	unsigned int			nr_events;

	unsigned int			nr_retries;

	unsigned int			nr_hangs;

	unsigned int			max_hang_time;

#endif

	struct hrtimer_clock_base	clock_base[HRTIMER_MAX_CLOCK_BASES];

};

kernel/time/hrtimer.c

+2 −2
Original line number Diff line number Diff line
@@ -1327,8 +1327,8 @@ void hrtimer_interrupt(struct clock_event_device *dev) 
	cpu_base->hang_detected = 1;

	raw_spin_unlock(&cpu_base->lock);

	delta = ktime_sub(now, entry_time);

	if (delta.tv64 > cpu_base->max_hang_time.tv64)

		cpu_base->max_hang_time = delta;

	if ((unsigned int)delta.tv64 > cpu_base->max_hang_time)

		cpu_base->max_hang_time = (unsigned int) delta.tv64;

	/*

	 * Limit it to a sensible value as we enforce a longer

	 * delay. Give the CPU at least 100ms to catch up.

kernel/time/timer_list.c

+1 −1
Original line number Diff line number Diff line
@@ -165,7 +165,7 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now) 
	P(nr_events);

	P(nr_retries);

	P(nr_hangs);

	P_ns(max_hang_time);

	P(max_hang_time);

#endif

#undef P

#undef P_ns