A Reconfigurable Fabric for Accelerating Large-scale Datacenter Services

Andrew Putnam, Adrian M. Caulfield, Eric S. Chung, Derek Chiou, Kypros Constantinides, John Demme, Hadi Esmaeilzadeh, Jeremy Fowers, Gopi Prashanth Gopal, Jan Gray, Michael Haselman, Scott Hauck, Stephen Heil, Amir Hormati, Joo-Young Kim, Sitaram Lanka, James Larus, Eric Peterson, Simon Pope, Aaron SmithJason Thong, Phillip Yi Xiao, Doug Burger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Datacenter workloads demand high computational capabilities, flexibility, power efficiency, and low cost. It is challenging to improve all of these factors simultaneously. To advance datacenter capabilities beyond what commodity server designs can provide, we have designed and built a composable, reconfigurablefabric to accelerate portions of large-scale software services. Each instantiation of the fabric consists of a 6x8 2-D torus of high-end Stratix V FPGAs embedded into a half-rack of 48 machines. One FPGA is placed into each server, accessible through PCIe, and wired directly to other FPGAs with pairs of 10 Gb SAS cables

In this paper, we describe a medium-scale deployment of this fabric on a bed of 1,632 servers, and measure its efficacy in accelerating the Bing web search engine. We describe the requirements and architecture of the system, detail the critical engineering challenges and solutions needed to make the system robust in the presence of failures, and measure the performance, power, and resilience of the system when ranking candidate documents. Under high load, the largescale reconfigurable fabric improves the ranking throughput of each server by a factor of 95% for a fixed latency distribution--- or, while maintaining equivalent throughput, reduces the tail latency by 29%
Original languageEnglish
Title of host publicationProceeding of the 41st Annual International Symposium on Computer Architecuture
Place of PublicationPiscataway, NJ, USA
PublisherInstitute of Electrical and Electronics Engineers
Pages13-24
Number of pages12
ISBN (Print)978-1-4799-4394-4
DOIs
Publication statusPublished - Jun 2014

Publication series

NameISCA '14
PublisherIEEE Press

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