Messages in this thread Patch in this message |  | | From | Pavankumar Kondeti <> | Subject | [RESEND PATCH V3] PM / EM: Micro optimization in em_cpu_energy | Date | Sat, 28 Nov 2020 07:09:23 +0530 |
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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> --- include/linux/energy_model.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index b67a51c..8810f1f 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -103,6 +103,9 @@ 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 -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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