TY - JOUR
T1 - A nonvolatile associative memory-based context-driven search engine using 90 nm CMOS/MTJ-hybrid logic-in-memory architecture
AU - Jarollahi, Hooman
AU - Onizawa, Naoya
AU - Gripon, Vincent
AU - Sakimura, Noboru
AU - Sugibayashi, Tadahiko
AU - Endoh, Tetsuo
AU - Ohno, Hideo
AU - Hanyu, Takahiro
AU - Gross, Warren J.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - This paper presents algorithm, architecture, and fabrication results of a nonvolatile context-driven search engine that reduces energy consumption as well as computational delay compared to classical hardware and software-based approaches. The proposed architecture stores only associations between items from multiple search fields in the form of binary links, and merges repeated field items to reduce the memory requirements and accesses. The fabricated chip achieves 13.6× memory reduction and 89% energy saving compared to a classical field-based approach in hardware, based on content-addressable memory (CAM). Furthermore, it achieves 8.6× reduced number of clock cycles in performing search operations compared to the CAM, and five orders of magnitude reduced number of clock cycles compared to a fabricated and measured ultra low-power CPU-based counterpart running a classical search algorithm in software. The energy consumption of the proposed architecture is on average three orders of magnitude smaller than that of a software-based approach. A magnetic tunnel junction (MTJ)-based logic-in-memory architecture is presented that allows simple routing and eliminates leakage current in standby using 90 nm CMOS/MTJ-hybrid technologies.
AB - This paper presents algorithm, architecture, and fabrication results of a nonvolatile context-driven search engine that reduces energy consumption as well as computational delay compared to classical hardware and software-based approaches. The proposed architecture stores only associations between items from multiple search fields in the form of binary links, and merges repeated field items to reduce the memory requirements and accesses. The fabricated chip achieves 13.6× memory reduction and 89% energy saving compared to a classical field-based approach in hardware, based on content-addressable memory (CAM). Furthermore, it achieves 8.6× reduced number of clock cycles in performing search operations compared to the CAM, and five orders of magnitude reduced number of clock cycles compared to a fabricated and measured ultra low-power CPU-based counterpart running a classical search algorithm in software. The energy consumption of the proposed architecture is on average three orders of magnitude smaller than that of a software-based approach. A magnetic tunnel junction (MTJ)-based logic-in-memory architecture is presented that allows simple routing and eliminates leakage current in standby using 90 nm CMOS/MTJ-hybrid technologies.
KW - Associative memory
KW - context-driven search
KW - logic-in-memory
KW - magnetic tunnel junction (MTJ)
KW - sparse clustered networks
UR - http://www.scopus.com/inward/record.url?scp=84919473442&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919473442&partnerID=8YFLogxK
U2 - 10.1109/JETCAS.2014.2361061
DO - 10.1109/JETCAS.2014.2361061
M3 - Article
AN - SCOPUS:84919473442
VL - 4
SP - 460
EP - 474
JO - IEEE Journal on Emerging and Selected Topics in Circuits and Systems
JF - IEEE Journal on Emerging and Selected Topics in Circuits and Systems
SN - 2156-3357
IS - 4
M1 - 6932498
ER -