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Locality-oblivious cache organization leveraging single-cycle multi-hop NoCs by Woo-Cheol Kwon; Tushar Krishna; Li-Shiuan Peh is a scholarly article available to read on EtoBox.

What is Locality-oblivious cache organization leveraging single-cycle multi-hop NoCs about?

Locality has always been a critical factor in on-chip data placement on CMPs as accessing further-away caches has in the past been more costly than accessing nearby ones. Substantial research on locality-aware designs have thus focused on keeping a copy of the data private. However, this complicates the problem of data tracking and search/invalidation; tracking the state of a line at all on-chip caches at a directory or performing full-chip broadcasts are both non-scalable and extremely expensive solutions. In this paper, we make the case for Locality-Oblivious Cache Organization (LOCO), a CMP cache organization that leverages the on-chip network to create virtual single-cycle paths between distant caches, thus redefining the notion of locality. LOCO is a clustered cache organization, supporting both homogeneous and heterogeneous cluster sizes, and provides near single-cycle accesses to data anywhere within the cluster, just like a private cache. Globally, LOCO dynamically creates a virtual mesh connecting all the clusters, and performs an efficient global data search and migration over this virtual mesh, without having to resort to full-chip broadcasts or perform expensive directo

Author

Woo-Cheol Kwon; Tushar Krishna; Li-Shiuan Peh

Publisher

ACM

Published

2014

Language

EN