Commit 245a057f authored by Will Deacon's avatar Will Deacon Committed by Thomas Gleixner
Browse files

timer_list: Print name of per-cpu wakeup device 



With the introduction of per-cpu wakeup devices that can be used in
preference to the broadcast timer, print the name of such devices when
they are available.

Signed-off-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210524221818.15850-6-will@kernel.org
parent ea5c7f1b

kernel/time/tick-broadcast.c

+7 −0
Original line number Diff line number Diff line
@@ -63,6 +63,13 @@ struct cpumask *tick_get_broadcast_mask(void) 
	return tick_broadcast_mask;

}



static struct clock_event_device *tick_get_oneshot_wakeup_device(int cpu);



const struct clock_event_device *tick_get_wakeup_device(int cpu)

{

	return tick_get_oneshot_wakeup_device(cpu);

}



/*

 * Start the device in periodic mode

 */

kernel/time/tick-internal.h

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadc 
extern int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);

extern struct tick_device *tick_get_broadcast_device(void);

extern struct cpumask *tick_get_broadcast_mask(void);

extern const struct clock_event_device *tick_get_wakeup_device(int cpu);

# else /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST: */

static inline void tick_install_broadcast_device(struct clock_event_device *dev, int cpu) { }

static inline int tick_is_broadcast_device(struct clock_event_device *dev) { return 0; }

kernel/time/timer_list.c

+9 −1
Original line number Diff line number Diff line
@@ -228,6 +228,14 @@ print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu) 
	SEQ_printf(m, " event_handler:  %ps\n", dev->event_handler);

	SEQ_printf(m, "\n");

	SEQ_printf(m, " retries:        %lu\n", dev->retries);



#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST

	if (cpu >= 0) {

		const struct clock_event_device *wd = tick_get_wakeup_device(cpu);



		SEQ_printf(m, "Wakeup Device: %s\n", wd ? wd->name : "<NULL>");

	}

#endif

	SEQ_printf(m, "\n");

}
@@ -248,7 +256,7 @@ static void timer_list_show_tickdevices_header(struct seq_file *m) 


static inline void timer_list_header(struct seq_file *m, u64 now)

{

	SEQ_printf(m, "Timer List Version: v0.8\n");

	SEQ_printf(m, "Timer List Version: v0.9\n");

	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);

	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);

	SEQ_printf(m, "\n");