sponsored byIEEEACMThe International Conference for High Performance 
Computing, Networking, Storage and Analysis
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SCHEDULE: NOV 16-21, 2014

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Microbank: Architecting Through-Silicon Interposer-Based Main Memory Systems

SESSION: Memory System Energy Efficiency


TIME: 4:30PM - 5:00PM


AUTHOR(S):Young Hoon Son, Seongil O, Hyunggyun Yang, Daejin Jung, Jung Ho Ahn, John Kim, Jangwoo Kim, Jae W. Lee



Through-Silicon Interposer (TSI) has been recently proposed to provide high memory bandwidth and improve energy efficiency of the main memory system. However, the impact of TSI on the main memory system architecture has not been well explored. While TSI improves the I/O energy efficiency, we show that it results in an unbalanced memory system design in terms of energy efficiency as the core DRAM dominates overall energy consumption. To balance and improve the energy efficiency of a TSI-based memory system, we propose microbank, a novel DRAM device organization in which each bank is partitioned into multiple smaller banks (called microbanks) that operate independently like conventional banks with minimal area overhead. The microbank organization significantly increases the amount of bank-level parallelism to improve performance while increasing energy efficiency of TSI-based memory system. The massive number of microbanks also simplifies the memory system design with the larger number of open DRAM rows.

Chair/Author Details:

Alex Ramirez (Chair) - Polytechnic University of Catalonia

Young Hoon Son - Seoul National University

Seongil O - Seoul National University

Hyunggyun Yang - Pohang University of Science and Technology

Daejin Jung - Seoul National University

Jung Ho Ahn - Seoul National University

John Kim - Korea Advanced Institute of Science and Technology

Jangwoo Kim - Pohang University of Science and Technology

Jae W. Lee - Sungkyunkwan University

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Paper provided by the ACM Digital Library

Paper also available from IEEE Computer Society