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Setting governor properties on ARM architectures in image processing applications

The huge growth in the smartphones market has led to the improvement in ARM architectures, so that today there are many devices based on them, with sufficient capacity to deal with certain image processing applications. These are used in VSN (Visual Sensor Networks) and in other scenarios, where the energy used in the process is a parameter to be considered. In these scenarios, and with the HMP (Heterogeneous multi-processing) architectures on which the current platforms are based, it is necessary to determine both the core as well as the working frequency in order to achieve the application's image processing objectives with the least possible energy consumption. In this type of system, the workload is oriented towards interactive applications, so the priorities are different to those of VSN type systems. Conventional regulation algorithms do not make appropriate use of the processor's frequency range, in relation to the load. This paper analyses the influence of the maximum frequency value on system performance and power consumption.