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Extending on-chip interconnects for rack-level remote resource access

Yisong Chang ; Ke Zhang ; Sally A McKee (Institutionen för data- och informationsteknik, Datorteknik (Chalmers)) ; Lixin Zhang ; Mingyu Chen ; Liqiang Ren ; Zhiwei Xu
Proceedings of the 34th IEEE International Conference on Computer Design, ICCD 2016 (1063-6404). p. 56-63. (2016)
[Konferensbidrag, refereegranskat]

The need to perform data analytics on exploding data volumes coupled with the rapidly changing workloads in cloud computing places great pressure on data-center servers. To improve hardware resource utilization across servers within a rack, we propose Direct Extension of On-chip Interconnects (DEOI), a high-performance and efficient architecture for remote resource access among server nodes. DEOI extends an SoC server node's on-chip interconnect to access resources in adjacent nodes with no protocol changes, allowing remote memory and network resources to be used as if they were local. Our results on a four-node FPGA prototype show that the latency of user-level, cross-node, random reads to DEOI-connected remote memory is as low as 1.16?s, which beats current commercial technologies. We exploit DEOI remote access to improve performance of the Redis in-memory key-value framework by 47%. When using DEOI to access remote network resources, we observe an 8.4% average performance degradation and only a 2.52?s ping-pong latency disparity compared to using local assets. These results suggest that DEOI can be a promising mechanism for increasing both performance and efficiency in next-generation data-center servers.

Nyckelord: custom interconnect, data center, remote access

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Denna post skapades 2017-01-30. Senast ändrad 2017-04-28.
CPL Pubid: 247884


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