PM / tick: Add tracepoints for suspend-to-idle diagnostics

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Add suspend/resume tracepoints to tick_freeze() and tick_unfreeze()
to catch when timekeeping is suspended and resumed during suspend-to-idle
so as to be able to check whether or not we enter the "frozen" state
and to measure the time spent in it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

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Rafael J. Wysocki 2015-05-10 01:23:35 +02:00

parent 819b1bb30d

commit 75e0678e70

1 changed files with 11 additions and 4 deletions

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kernel/time/tick-common.c

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