Optically Connected Memory for Disaggregated Data Centers
| Autor: | Gonzalez, Jorge, Gazman, Alexander, Hattink, Maarten, Palma, Mauricio G., Bahadori, Meisam, Rubio-Noriega, Ruth, Orosa, Lois, Glick, Madeleine, Mutlu, Onur, Bergman, Keren, Azevedo, Rodolfo |
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| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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 energy-per-bit consumption and (2) OCM performs up to 5.5x faster than a disaggregated memory with 40G PCIe NIC connectors to computing nodes. Comment: This work is to appear at SBAC-PAD 2020 |
| Databáze: | arXiv |
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