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Article Dans Une Revue Journal of Parallel and Distributed Computing Année : 2017

Bimodal packet aware scheduling for an OFDMA based on-chip RF interconnect

Résumé

As massive microprocessors with thousands of cores are on the horizon, using Radio Frequency (RF) orstate-of-the-art nanophotonic on-chip interconnects appears as a solution to cope with current latencyconstraints. Due to their reliance on numerous static circuitry to generate communication channels,proposed architectures cannot rearbitrate the available bandwidth to on-chip nodes according to instantaneoustraffic demands. In this paper, we present an Orthogonal Frequency Division Multiple Access(OFDMA) based wired on-chip RF interconnect as an effective reconfigurable and broadcast capablemodulation. A hierarchical 2048-core CMP architecture is explained along with its hybrid cache coherencymechanism. Based on this novel architecture, we introduce an innovative bandwidth arbitrationmechanism which allocates more bandwidth to cache-line carrying long packets without requiringextra signaling overhead. Exploiting broadcast capability and effective reconfigurability, we show thatthis bimodal packet aware communication infrastructure can provide up to 10× less average latencycompared to a static counterpart under certain circumstances.
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Dates et versions

hal-01558366 , version 1 (07-07-2017)

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Citer

Eren Unlu, Christophe Moy. Bimodal packet aware scheduling for an OFDMA based on-chip RF interconnect. Journal of Parallel and Distributed Computing, 2017, 109, pp.15 - 28. ⟨10.1016/j.jpdc.2017.05.002⟩. ⟨hal-01558366⟩
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