Title :
SWIFT: A SWing-reduced interconnect for a Token-based Network-on-Chip in 90nm CMOS
Author :
Krishna, Tushar ; Postman, Jacob ; Edmonds, Christopher ; Peh, Li-Shiuan ; Chiang, Patrick
Author_Institution :
Dept. of EECS, Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
With the advent of chip multi-processors (CMPs), on-chip networks are critical for providing low-power communications that scale to high core counts. With this motivation, we present a 64-bit, 8×8 mesh Network-on-Chip in 90nm CMOS that: (a) bypasses flit buffering in routers using Token Flow Control, thereby reducing buffer power along the control path, and (b) uses low-voltage-swing crossbars and links to reduce interconnect energy in the data path. These approaches enable 38% power savings and 39% latency reduction, when compared with an equivalent baseline network. An experimental 2×2 core prototype, operating at 400 MHz, validates our design.
Keywords :
CMOS integrated circuits; integrated circuit interconnections; low-power electronics; microprocessor chips; multiprocessing systems; network routing; network-on-chip; CMOS technology; SWIFT; chip multiprocessor; equivalent baseline network; frequency 400 MHz; interconnect energy reduction; latency reduction; low-power communication; low-voltage-swing crossbar; network-on-chip network; power saving; size 90 nm; swing-reduced interconnect; token flow control; Clocks; Microarchitecture; Pipelines; Receivers; Resource management; System-on-a-chip; Wires;
Conference_Titel :
Computer Design (ICCD), 2010 IEEE International Conference on
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4244-8936-7
DOI :
10.1109/ICCD.2010.5647666
