research-article

Altocumulus: Scalable Scheduling for Nanosecond-Scale Remote Procedure Calls

Authors:

Iris Uwizeyimana,

Karthik Ganesan,

Mark C. Jeffrey,

Natalie Enright JergerAuthors Info & Claims

MICRO '22: Proceedings of the 55th Annual IEEE/ACM International Symposium on Microarchitecture

Pages 423 - 440

https://doi.org/10.1109/MICRO56248.2022.00039

Published: 18 December 2023 Publication History

Abstract

Online services in modern datacenters use Remote Procedure Calls (RPCs) to communicate between different software layers. Despite RPCs using just a few small functions, inefficient RPC handling can cause delays to propagate across the system and degrade end-to-end performance. Prior work has reduced RPC processing time to less than 1 μs, which now shifts the bottleneck to the scheduling of RPCs. Existing RPC schedulers suffer from either high overheads, inability to effectively utilize high core-count CPUs or do not adaptively fit different traffic patterns. To address these shortcomings, we present Altocumulus,¹ a scalable, software-hardware co-design to schedule RPCs at nanosecond scales. Altocumulus provides a proactive scheduling scheme and low-overhead messaging mechanism on top of a decentralized user runtime. Altocumulus also offers direct access from the user space to a set of simple hardware primitives to quickly migrate long-latency RPCs. We evaluate Altocumulus with synthetic workloads and an end-to-end in-memory key-value store application under real-world traffic patterns. Altocumulus improves throughput by 1.3--24.6× under a 99^th percentile latency <300 μs and reduces tail latency by up to 15.8× on 16-core systems over current state-of-the-art software and hardware schedulers. For 256-core systems, integrating Altocumulus with either a hardware-optimized NIC or commodity PCIe NIC can improve throughput by 2.8× or 2.7×, respectively, under 99^th percentile latency <8.5 μs.

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Cited By

Zhao JShu RQu LYang ZJerger NChiou DCheng PXiong Y(2024)SmartNIC-Enabled Live Migration for Storage-Optimized VMsProceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems10.1145/3678015.3680487(45-52)Online publication date: 4-Sep-2024
https://dl.acm.org/doi/10.1145/3678015.3680487
Kim GSchulzrinne HKohler EMaltz DMisra V(2023)NetClone: Fast, Scalable, and Dynamic Request Cloning for Microsecond-Scale RPCsProceedings of the ACM SIGCOMM 2023 Conference10.1145/3603269.3604820(195-207)Online publication date: 10-Sep-2023
https://dl.acm.org/doi/10.1145/3603269.3604820

Index Terms

Altocumulus: Scalable Scheduling for Nanosecond-Scale Remote Procedure Calls

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cover image ACM Conferences

MICRO '22: Proceedings of the 55th Annual IEEE/ACM International Symposium on Microarchitecture

October 2022

1498 pages

ISBN:9781665462723

General Chairs:
Nikos Hardavellas
Northwestern University
,
Simone Campanoni
Northwestern University
,
Program Chairs:
Boris Grot
University of Edinburgh
,
Ulya Karpuzcu
University of Minnesota, Twin Cities

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SIGMICRO: ACM Special Interest Group on Microarchitectural Research and Processing

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Published: 18 December 2023

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MICRO '22: 55th Annual IEEE/ACM International Symposium on Microarchitecture

October 1 - 5, 2022

Illinois, Chicago, USA

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Zhao JShu RQu LYang ZJerger NChiou DCheng PXiong Y(2024)SmartNIC-Enabled Live Migration for Storage-Optimized VMsProceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems10.1145/3678015.3680487(45-52)Online publication date: 4-Sep-2024
https://dl.acm.org/doi/10.1145/3678015.3680487
Kim GSchulzrinne HKohler EMaltz DMisra V(2023)NetClone: Fast, Scalable, and Dynamic Request Cloning for Microsecond-Scale RPCsProceedings of the ACM SIGCOMM 2023 Conference10.1145/3603269.3604820(195-207)Online publication date: 10-Sep-2023
https://dl.acm.org/doi/10.1145/3603269.3604820

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