cpuidle: teo: Do not call tick_nohz_get_sleep_length() upfront

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Because the cost of calling tick_nohz_get_sleep_length() may increase
in the future, reorder the code in teo_select() so it first uses the
statistics to pick up a candidate idle state and applies the utilization
heuristic to it and only then calls tick_nohz_get_sleep_length() to
obtain the sleep length value and refine the selection if necessary.

This change by itself does not cause tick_nohz_get_sleep_length() to
be called less often, but it prepares the code for subsequent changes
that will do so.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Kajetan Puchalski <kajetan.puchalski@arm.com>
Tested-by: Anna-Maria Behnsen <anna-maria@linutronix.de>

...

This commit is contained in:

Rafael J. Wysocki 2023-08-03 23:07:41 +02:00

parent 9a41e16f11

commit 21d28cd2fa

1 changed files with 44 additions and 61 deletions

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105

drivers/cpuidle/governors/teo.c

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