Dequeue Rate-Agnostic Switch Buffer Sharing through Packet Queueing Delay

Krishna Agarwal, Vamsi Addanki, and Habib Mostafaei.

Proceedings of the CoNEXT Student Workshop 2024 (CoNEXT-SW ’24)

Dec Los Angeles, CA, USA DOI 10.1145/3694812.3699924

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Abstract

Datacenter network switches share packet buffers among all ports to enhance throughput and reduce packet drops. However, declining buffer space per-port-per-bandwidth unit challenges buffer-sharing mechanisms, affecting performance. Recent studies, like ABM (SIGCOMM 2022), suggest hierarchical packet admission schemes to address this, but their complexity hinders efficiency. We propose CBM, a packet delay-based buffer sharing scheme that manages buffer space and controls queue drain rates using a single configurable parameter. Preliminary evaluation shows that CBM improves advanced transport protocol performance, such as PowerTCP, reducing Flow Completion Times (FCTs) by up to 45.07% compared with ABM.

Cite this work

BibTeX entry

@inproceedings{cbmconextsw24,
  author = {Agarwal, Krishna and Addanki, Vamsi and Mostafaei, Habib},
  title = {Dequeue Rate-Agnostic Switch Buffer Sharing through Packet Queueing Delay},
  year = {2024},
  isbn = {979-8-4007-1255-5/24/1},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  url = {https://doi.org/10.1145/3694812.3699924},
  doi = {10.1145/3694812.3699924},
  booktitle = {Proceedings of the CoNEXT Student Workshop 2024 (CoNEXT-SW ’24)},
  numpages = {2},
  keywords = {Switch buffer, packet queueing delay, datacenter networks},
  series = {CoNEXT-SW '24}
}