Optically Connected Memory for Disaggregated Data Centers

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Gonzalez, Jorge ; Gazman, Alexander ; Hattink, Maarten ; Palma, Mauricio G. ; Bahadori, Meisam ; Rubio-Noriega, Ruth ; Orosa, Lois ; Glick, Madeleine ; Mutlu, Onur ; Bergman, Keren ; Azevedo, Rodolfo ; IEEE

• Tipo de documento: Artigo Científico
• Fonte: 2020 IEEE 32ND INTERNATIONAL SYMPOSIUM ON COMPUTER ARCHITECTURE AND HIGH PERFORMANCE COMPUTING (SBAC-PAD 2020); v. N/A, p. 8-pg., 2020-01-01.

Resumo

Recent advances in integrated photonics enable the implementation of reconfigurable, high-bandwidth, and low energy-per-bit interconnects in next-generation data centers. We propose and evaluate an Optically Connected Memory (OCM) architecture that disaggregates the main memory from the computation nodes in data centers. OCM is based on micro-ring resonators (MRRs), and it does not require any modification to the DRAM memory modules. We calculate energy consumption from real photonic devices and integrate them into a system simulator to evaluate performance. Our results show that (1) OCM is capable of interconnecting four DDR4 memory channels to a computing node using two fibers with 1.07 pJ energyper-bit consumption and (2) OCM performs up to 5.5x faster than a disaggregated memory with 40G PCIe NIC connectors to computing nodes. (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 14/01642-9 - OMPSoC: Modelagem de Sistemas Heterogêneos Comunicados por Redes Intrachip Ópticas
• Beneficiário: Jorge Luis Gonzalez Reano
• Modalidade de apoio: Bolsas no Brasil - Doutorado