DocumentCode :
1650346
Title :
Dynamic Directories: A mechanism for reducing on-chip interconnect power in multicores
Author :
Das, Abhishek ; Schuchhardt, Matt ; Hardavellas, Nikos ; Memik, Gokhan ; Choudhary, Alok
Author_Institution :
Datacenter & Connected Syst. Group, Intel Corp., Hillsboro, OR, USA
fYear :
2012
Firstpage :
479
Lastpage :
484
Abstract :
On-chip interconnection networks consume a significant fraction of the chip´s power, and the rapidly increasing core counts in future technologies is going to further aggravate their impact on the chip´s overall power consumption. A large fraction of the traffic originates not from data messages exchanged between sharing cores, but from the communication between the cores and intermediate hardware structures (i.e., directories) for the purpose of maintaining coherence in the presence of conflicting updates. In this paper, we propose Dynamic Directories, a method allowing the directories to be placed arbitrarily in the chip by piggy-backing the virtual to physical address translation. This eliminates a large fraction of the on-chip interconnect traversals, hence reducing the power consumption. Through trace-driven and cycle-accurate simulation in a range of scientific and Map-Reduce applications, we show that our technique reduces the power and energy expended by the on-chip interconnect by up to 37% (16.4% on average) with negligible hardware overhead and a small improvement in performance (1.3% on average).
Keywords :
cache storage; cores; integrated circuit modelling; network-on-chip; power integrated circuits; chip overall power consumption; cycle-accurate simulation; data messages; dynamic directories; map-reduce applications; multicores; piggy-backing; reducing on-chip interconnect power; through trace-driven; Coherence; Integrated circuit interconnections; Multicore processing; Principal component analysis; System-on-a-chip; Tiles; Multicore architecture; Non-uniform caches; On-chip networks;
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.2012.6176456
Filename :
6176456
Link To Document :
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