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Worst-case Traffic for Oblivious Routing Functions

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2 Author(s)

This paper presents an algorithm to find a worst-case trafficpattern for any oblivious routing algorithm on an arbitrary interconnectionnetwork topology. The linearity of channel loading offered by obliviousrouting algorithms enables the problem to be mapped to a bipartitemaximum-weight matching, which can be solved in polynomial time forrouting functions with a polynomial number of paths. Finding exact worstcaseperformance was previously intractable, and we demonstrate an examplecase where traditional characterization techniques overestimate thethroughput of a particular routing algorithm by 47%.

Published in:

Computer Architecture Letters  (Volume:1 ,  Issue: 1 )

Date of Publication:

January-December 2002

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