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Erschienen in:
2017 | OriginalPaper | Buchkapitel
4. Normally-Off Computing
verfasst von : Takashi Nakada, Hiroshi Nakamura
Erschienen in: Normally-Off Computing
Verlag: Springer Japan
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Abstract
Normally-off computing is based on synergetic effect of aggressive power gating and non-volatile memory. To maximize opportunity of power reduction, as frequent as possible power management is necessary but too frequent state transition increases overhead energy. To manage this tradeoff, Break Even Time is introduced. If BET is small, there is more opportunity of power reduction. Therefore, new device that has small BET is desired. In addition to this, architectural technologies are also important to reduce effective BET by combining multiple devices that has different characteristics. Finally, using such heterogeneous devices, dynamic behavior is managed by software and energy consumption is minimized. To realize normally-off computing, hardware/software co-design and co-optimization are required. This is a key for not only system designers, but also hardware engineers and software developers.