TAP - Token-Based Adaptive Power Gating

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Provided by: Association for Computing Machinery
Topic: Hardware
Format: PDF
The authors propose a low-overhead technique, Token-based Adaptive Power gating (TAP), to power gate an actively executing out-of-order core during memory accesses. TAP tracks every system memory request, providing a lower-bound estimate for the response time. TAP also tracks the state of every power-gateable core in the system, to provide minimal latency wake-up modes to cores such that voltage noise safety margins are not violated. A power-gating switch that utilizes TAP can deterministically power gate its core with energy savings up to 22.39% and no performance hit.
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