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PM / EM: Micro optimization in em_pd_energy

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If the sum of the utilization of CPUs in a power domain is zero,
return the energy as 0 instead of doing any math.

Change-Id: I9b1a83d210c30a8a86da26f94ac0c2f855d2ed10
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti 2019-09-23 14:38:35 +05:30
parent 17186baa4c
commit 061b94ae4c
1 changed files with 3 additions and 0 deletions
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3
include/linux/energy_model.h
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@ -83,6 +83,9 @@ static inline unsigned long em_pd_energy(struct em_perf_domain *pd,
struct em_cap_state *cs;
int i, cpu;
if (!sum_util)
return 0;
/*
* In order to predict the capacity state, map the utilization of the
* most utilized CPU of the performance domain to a requested frequency,