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Validating the Sharing Behavior and Latency Characteristics of the L4S Architecture
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- Oljira, Dejene Boru (author)
- Karlstads universitet,Institutionen för matematik och datavetenskap (from 2013),DISCO
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- Grinnemo, Karl-Johan, 1968- (author)
- Karlstads universitet,Institutionen för matematik och datavetenskap (from 2013)
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- Brunström, Anna, 1967- (author)
- Karlstads universitet,Institutionen för matematik och datavetenskap (from 2013)
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- (creator_code:org_t)
- 2020-05-23
- 2020
- English.
- In: Computer communication review. - : ACM Digital Library. - 0146-4833 .- 1943-5819. ; 50:2, s. 37-44
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The strict low-latency requirements of applications such as virtual reality, online gaming, etc., can not be satisfied by the current internet. This is due to the characteristics of classic TCP such as Reno and TCP Cubic which induce high queuing delays when used for capacity-seeking traffic, which in turn results in unpredictable latency. The Low Latency, Low Loss, Scalable throughput (L4S) architecture addresses this problem by combining scalable congestion controls such as DCTCP and TCP Prague with early congestion signaling from the network. It defines a Dual Queue Coupled (DQC) AQM that isolates low-latency traffic from the queuing delay of classic traffic while ensuring the safe co-existence of scalable and classic flows on the global Internet. In this paper, we benchmarktheDualPI2 scheduler, a reference implementation of DQC AQM, to validate some of the experimental result(s) reported in the previous works that demonstrate the co-existence of scalable and classic congestion controls and its low-latency service. Our results validate the co-existence of scalable and classic flows using DualPI2 Singlequeue (SingleQ) AQM, and queue latency isolation of scalable flows using DualPI2 Dual queue (DualQ) AQM. However, the rate or win-dow fairness between DCTCP without fair-queuing (FQ) pacing and TCP Cubic using DualPI2 DualQ AQM deviates from the original results. We attribute the difference in our results and the original results to the sensitivity of the L4S architecture to traffic bursts and the burst sending pattern of the Linux kernel.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
Keyword
- Congestion control
- L4S
- ECN
- Low-latency
- Reproducibility
- Computer Science
- Datavetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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