TY - GEN
T1 - Energy/performance modeling for collective communication in 3-D torus cluster networks
AU - Conner, S.
AU - Link, G. M.
AU - Tobita, S.
AU - Irwin, M. J.
AU - Raghavan, P.
PY - 2006
Y1 - 2006
N2 - As supercomputers scale ever larger, energy consumption in interconnection networks is an emerging problem. In this work, we analyze the energy consumption and traffic patterns in a 3-D torus network in order to locate and exploit opportunities to save energy by disabling network links dynamically. Using a custom-built simulator, TorusSim, we show that, for common scientific computing codes that utilize collective communications, regularities in the network and algorithmic data flow result in many unused and under-utilized links that can be disabled to save energy at no performance cost. In the case of a reduce operation, we see that at least 56% of the links in a 4x4x4 torus network can be disabled during communication, with significant other opportunity to save energy on under-utilized links that could lead to over 80% overall link energy savings.
AB - As supercomputers scale ever larger, energy consumption in interconnection networks is an emerging problem. In this work, we analyze the energy consumption and traffic patterns in a 3-D torus network in order to locate and exploit opportunities to save energy by disabling network links dynamically. Using a custom-built simulator, TorusSim, we show that, for common scientific computing codes that utilize collective communications, regularities in the network and algorithmic data flow result in many unused and under-utilized links that can be disabled to save energy at no performance cost. In the case of a reduce operation, we see that at least 56% of the links in a 4x4x4 torus network can be disabled during communication, with significant other opportunity to save energy on under-utilized links that could lead to over 80% overall link energy savings.
UR - http://www.scopus.com/inward/record.url?scp=34548214717&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548214717&partnerID=8YFLogxK
U2 - 10.1145/1188455.1188599
DO - 10.1145/1188455.1188599
M3 - Conference contribution
AN - SCOPUS:34548214717
SN - 0769527000
SN - 9780769527000
T3 - Proceedings of the 2006 ACM/IEEE Conference on Supercomputing, SC'06
BT - Proceedings of the 2006 ACM/IEEE Conference on Supercomputing, SC'06
ER -