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PM / Domains: Merge measurements for PM QoS device latencies

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Measure latency does by itself contribute to an increased latency, thus we
should avoid it when it isn't needed.

By merging the latency measurements for the ->save_state() and the
->stop() callbacks, we get one measurement instead of two and we get one
value to store instead of two. Let's also apply the likewise change for
the ->start() and ->restore_state() callbacks.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Lina Iyer <lina.iyer@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2015-10-15 17:02:19 +02:00 • committed by Rafael J. Wysocki
parent 51cda84489
commit 2b1d88cda3
3 changed files with 55 additions and 56 deletions
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6
include/linux/pm_domain.h
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@ -81,10 +81,8 @@ struct gpd_link {
};
struct gpd_timing_data {
s64 stop_latency_ns;
s64 start_latency_ns;
s64 save_state_latency_ns;
s64 restore_state_latency_ns;
s64 suspend_latency_ns;
s64 resume_latency_ns;
s64 effective_constraint_ns;
bool constraint_changed;
bool cached_stop_ok;