Definition of a kernel energy model in DT

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One Line Summary

Overview of kernel energy model proposal and its related DT bindings to describe energy model parameters.


The scheduler groups CPUS at each topology level. Energy Aware Scheduler(EAS) needs to associate energy which describes the power usage of the CPU, at the relevant topology level, in each idle state and active state. Each active states also need the compute capacity information.

The goal of this topic is to discuss the energy model representation in DT.


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    Sudeep works on Linux kernel’s power management code, cpuidle, cpufreq, and the ACPI subsystem. He works at ARM Ltd, Cambridge as a Software Engineer mainly focusing on power management in Linux kernel, ACPI and other platform/power interfaces like PSCI, SCPI,..etc. He has been contributing to the Linux kernel since 2012 and co-maintaining support for ARM Versatile Express development platforms.

  • Juri Lelli

    ARM Ltd.


    Juri Lelli received a Bachelor’s degree in Computer Engineering at the
    University of Pisa (Italy) in 2006, and a Master’s degree in Computer
    Engineering at the University of Pisa (Italy) in 2010 with a thesis
    titled “Design and development of real-time scheduling mechanisms for
    multiprocessor systems”. He then earned a PhD degree at the Scuola
    Superiore Sant’Anna of Pisa, Italy (ReTiS Lab). His PhD thesis focused
    on reducing the gap between classical real-time theory and practical
    implementation of real-time scheduling algorithms on General Purpose
    Operating Systems, with a special focus on Linux. At the moment, he works
    at ARM Ltd., where he continues contributing to the Linux scheduler