AgilePkgC: An Agile System Idle State Architecture for Energy Proportional Datacenter Servers

This paper presents the design of AgilePkgC (APC): a new C-state architecture that improves the energy proportionality of servers that operate at low utilization while running microservices of user-facing applications. APC targets the reduction of power when all cores are idle in a shallow C-state,...

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Veröffentlicht in:arXiv.org 2022-04
Hauptverfasser: Antoniou, Georgia, Volos, Haris, Bartolini, Davide B, Rollet, Tom, Sazeides, Yiannakis, Jawad Haj Yahya
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Sazeides, Yiannakis
Jawad Haj Yahya
description This paper presents the design of AgilePkgC (APC): a new C-state architecture that improves the energy proportionality of servers that operate at low utilization while running microservices of user-facing applications. APC targets the reduction of power when all cores are idle in a shallow C-state, ready to transition back to service. In particular, APC targets the power of the resources shared by the cores (e.g., LLC, network-on-chip, IOs, DRAM) which remain active while no core is active to use them. APC realizes its objective by using low-overhead hardware to facilitate sub-microsecond entry/exit latency to a new package C-state and judiciously selecting intermediate power modes for the different shared resources that offer fast transition and, yet, substantial power savings. Our experimental evaluation supports that APC holds the potential to reduce server power by up to 41% with a worst-case performance degradation of less than 0.1% for several representative workloads. Our results clearly support the research and development and eventual adoption of new deep and fast package C-states, like APC, for future server CPUs targeting datacenters running microservices.
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subjects Computer architecture
Data centers
Idling
Network latency
Performance degradation
R&D
Research & development
Servers
System on chip
title AgilePkgC: An Agile System Idle State Architecture for Energy Proportional Datacenter Servers
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