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This paper proposes novel abstractions that provide a uniform basis for management across different system levels and domains: (1) M-channels constitute the base mechanisms for communication between management embedded in hardware, in virtual machines, and in applications, and (2) M-brokers enable policy coordination across different management layers and solutions. The value of the approach is demonstrated with an implementation of coordinated power management policies that operate across the hardware-software boundary, for multiple virtual machines, and across different physical platforms. Coordination is shown useful for meeting application-level SLAs and/or to enforce power caps, with or without assistance from guest virtual machines.
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