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Scientists find GPS most power consuming feature in phones

Washington, US: Computer scientists at the University of Texas at Austin and the Australian National University conducted the first systematic power profiles of microprocessors, which could help cut the power consumption of both small cell phones and giant data centres. 
“In terms of energy, the GPS is one of the most expensive functions on your phone. A bad algorithm might ping your GPS far more than is necessary for the application to function well. If the application writer could analyse the power profile, they would be motivated to write an algorithm that pings it half as often to save energy without compromising functionality,” stated Kathryn McKinley, professor of computer science at The University of Texas at Austin, US.
According to the scientists, this study may point the way to how companies like Google, Apple, Intel and Microsoft can make software and hardware that will lower the energy costs of very small and very large devices.
“For companies like Google and Microsoft, which run these enormous data centres, there is a big incentive to find ways to be more power efficient. More and more of the money they’re spending isn’t going toward buying the hardware, but toward the power the data centers draw,” said McKinley.
McKinley explained that without detailed power profiles of how microprocessors function with different software and different chip architectures, companies are limited in terms of how well they can optimise for energy usage. The study, she conducted with Stephen M Blackburn of The Australian National University and their graduate students is the first to systematically measure and analyse application power, performance, and energy on a wide variety of hardware.
Source: Times of India