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PM / EM: Micro optimization in em_cpu_energy

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When the sum of the utilization of CPUs in a power domain is zero,
return the energy as 0 without doing any computations.

Acked-by: Quentin Perret <qperret@google.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Pavankumar Kondeti 2020-11-28 07:09:23 +05:30 committed by Rafael J. Wysocki
parent b56a352c0d
commit 1080399542
1 changed files with 3 additions and 0 deletions
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3
include/linux/energy_model.h
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@ -106,6 +106,9 @@ static inline unsigned long em_cpu_energy(struct em_perf_domain *pd,
struct em_perf_state *ps;
int i, cpu;
if (!sum_util)
return 0;
/*
* In order to predict the performance state, map the utilization of
* the most utilized CPU of the performance domain to a requested