Commit 10803995 authored Nov 28, 2020 by Pavankumar Kondeti Committed by Rafael J. Wysocki Dec 08, 2020

PM / EM: Micro optimization in em_cpu_energy



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>

parent b56a352c

include/linux/energy_model.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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

Admin message