DocumentCode :
1649739
Title :
Dynamically reconfigurable hybrid cache: An energy-efficient last-level cache design
Author :
Chen, Yu-Ting ; Cong, Jason ; Huang, Hui ; Liu, Bin ; Liu, Chunyue ; Potkonjak, Miodrag ; Reinman, Glenn
Author_Institution :
Comput. Sci. Dept., Univ. of California, Los Angeles, CA, USA
fYear :
2012
Firstpage :
45
Lastpage :
50
Abstract :
The recent development of non-volatile memory (NVM), such as spin-torque transfer magnetoresistive RAM (STT-RAM) and phase-change RAM (PRAM), with the advantage of low leakage and high density, provides an energy-efficient alternative to traditional SRAM in cache systems. We propose a novel reconfigurable hybrid cache architecture (RHC), in which NVM is incorporated in the last-level cache together with SRAM. RHC can be reconfigured by powering on/off SRAM/NVM arrays in a way-based manner. In this work, we discuss both the architecture and circuit design issues for RHC. Furthermore, we provide hardware-based mechanisms to dynamically reconfigure RHC on-the-fly based on the cache demand. Experimental results on a wide range of benchmarks show that the proposed RHC achieves an average 63%, 48% and 25% energy saving over non-reconfigurable SRAM-based cache, non-reconfigurable hybrid cache, and reconfigurable SRAM-based cache, while maintaining the system performance (at most 4% performance overhead).
Keywords :
SRAM chips; cache storage; cache system; circuit design; dynamically reconfigurable hybrid cache; energy-efficient last-level cache design; hardware-based mechanism; hybrid cache architecture; nonreconfigurable SRAM-based cache; nonreconfigurable hybrid cache; nonvolatile memory; phase-change RAM; spin-torque transfer magnetoresistive RAM; Arrays; Nonvolatile memory; Phase change random access memory; Radiation detectors; Runtime;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Design, Automation & Test in Europe Conference & Exhibition (DATE), 2012
Conference_Location :
Dresden
ISSN :
1530-1591
Print_ISBN :
978-1-4577-2145-8
Type :
conf
DOI :
10.1109/DATE.2012.6176431
Filename :
6176431
Link To Document :
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