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Summary: A Case for Guarded Power Gating for Multi-Core Processors
Niti Madan, Alper Buyuktosunoglu, Pradip Bose
IBM T.J. Watson Research Center
nmadan,alperb,pbose@us.ibm.com
Murali Annavaram
University of Southern California
annavara@usc.edu
Abstract
Dynamic power management has become an essen-
tial part of multi-core processors and associated systems.
Dedicated controllers with embedded power management
firmware are now an integral part of design in such multi-
core server systems. Devising a robust power management
policy that meets system-intended functionality across a di-
verse range of workloads remains a key challenge. One of
the primary issues of concern in architecting a power man-
agement policy is that of performance degradation beyond a
specified limit. A secondary issue is that of negative power
savings. Guarding against such "holes" in the management
policy is crucial in order to ensure successful deployment
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