Proceedings of the 2021 ACM SIGCOMM 2021 Conference最新文献_第4页

revisiting the open vSwitch dataplane ten years later 十年后重新访问开放的vSwitch数据平面

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472914

William Tu, Yingying Wei, G. Antichi, Ben Pfaff

引用次数: 28

RoS: passive smart surface for roadside-to-vehicle communication RoS:用于道路与车辆通信的被动智能表面

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472896

John Nolan, Kun Qian, Xinyu Zhang

引用次数: 30

BlueFi

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472920

Hsun-Wei Cho, K. Shin

{"title":"BlueFi","authors":"Hsun-Wei Cho, K. Shin","doi":"10.1145/3452296.3472920","DOIUrl":"https://doi.org/10.1145/3452296.3472920","url":null,"abstract":"Bluetooth and WiFi are the two dominant technologies enabling the communication of mobile and IoT devices. Built with specific design goals and principles, they are vastly different, each using its own hardware and software. Thus, they are not interoperable and require different hardware. One may, therefore, ask a simple, yet seemingly impossible question: “Can we transmit Bluetooth packets on commercial off-the-shelf (COTS) WiFi hardware?” We answer this question positively by designing, implementing and demonstrating a novel system called BlueFi. It can readily run on existing, widely-deployed WiFi devices without modifying NIC firmware/hardware. BlueFi works by reversing the signal processing of WiFi hardware and finds special 802.11n packets that are decodable by unmodified Bluetooth devices. With BlueFi, every 802.11n device can be used simultaneously as a Bluetooth device, which instantly increases the coverage of Bluetooth, thanks to the omnipresence of WiFi devices. BlueFi is particularly useful for WiFi-only devices or environments. We implement and evaluate BlueFi on devices with widely-adopted WiFi chips. We also construct two prevalent end-to-end apps — Bluetooth beacon and audio — to showcase the practical use of BlueFi. The former allows ordinary APs to send location beacons; the latter enables WiFi chips to stream Bluetooth audio in real time.","PeriodicalId":20487,"journal":{"name":"Proceedings of the 2021 ACM SIGCOMM 2021 Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74332904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Anycast In context: a tale of two systems 上下文中:两个系统的故事

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472891

T. Koch, Ethan Katz-Bassett, J. Heidemann, Matt Calder, Calvin Ardi, Ke Li

{"title":"Anycast In context: a tale of two systems","authors":"T. Koch, Ethan Katz-Bassett, J. Heidemann, Matt Calder, Calvin Ardi, Ke Li","doi":"10.1145/3452296.3472891","DOIUrl":"https://doi.org/10.1145/3452296.3472891","url":null,"abstract":"Anycast is used to serve content including web pages and DNS, and anycast deployments are growing. However, prior work examining root DNS suggests anycast deployments incur significant inflation, with users often routed to suboptimal sites. We reassess anycast performance, first extending prior analysis on inflation in the root DNS. We show that inflation is very common in root DNS, affecting more than 95% of users. However, we then show root DNS latency emph{hardly matters} to users because caching is so effective. These findings lead us to question: is inflation inherent to anycast, or can inflation be limited when it matters? To answer this question, we consider Microsoft's anycast CDN serving latency-sensitive content. Here, latency matters orders of magnitude more than for root DNS. Perhaps because of this need, only 35% of CDN users experience any inflation, and the amount they experience is smaller than root DNS. We show that CDN anycast latency has little inflation due to extensive peering and engineering. These results suggest prior claims of anycast inefficiency reflect experiments on a single application rather than anycast's technical potential, and they demonstrate the importance of context when measuring system performance.","PeriodicalId":20487,"journal":{"name":"Proceedings of the 2021 ACM SIGCOMM 2021 Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91169806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Programmable packet scheduling with a single queue 单队列可编程数据包调度

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472887

Zhuolong Yu, Chuheng Hu, Jingfeng Wu, Xiao Sun, V. Braverman, Mosharaf Chowdhury, Zhenhua Liu, Xin Jin

{"title":"Programmable packet scheduling with a single queue","authors":"Zhuolong Yu, Chuheng Hu, Jingfeng Wu, Xiao Sun, V. Braverman, Mosharaf Chowdhury, Zhenhua Liu, Xin Jin","doi":"10.1145/3452296.3472887","DOIUrl":"https://doi.org/10.1145/3452296.3472887","url":null,"abstract":"Programmable packet scheduling enables scheduling algorithms to be programmed into the data plane without changing the hardware. Existing proposals either have no hardware implementations for switch ASICs or require multiple strict-priority queues. We present Admission-In First-Out (AIFO) queues, a new solution for programmable packet scheduling that uses only a emph{single} first-in first-out queue. AIFO is motivated by the confluence of two recent trends: emph{shallow} buffers in switches and emph{fast-converging} congestion control in end hosts, that together leads to a simple observation: the decisive factor in a flow's completion time (FCT) in modern datacenter networks is often emph{which} packets are enqueued or dropped, not the emph{ordering} they leave the switch. The core idea of AIFO is to maintain a sliding window to track the ranks of recent packets and compute the relative rank of an arriving packet in the window for admission control. Theoretically, we prove that AIFO provides bounded performance to Push-In First-Out (PIFO). Empirically, we fully implement AIFO and evaluate AIFO with a range of real workloads, demonstrating AIFO closely approximates PIFO. Importantly, unlike PIFO, AIFO can run at line rate on existing hardware and use minimal switch resources---as few as a single queue.","PeriodicalId":20487,"journal":{"name":"Proceedings of the 2021 ACM SIGCOMM 2021 Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83933265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 45

Prognosis: closed-box analysis of network protocol implementations 预测:网络协议实现的闭箱分析

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472938

Tiago Ferreira, Harrison Brewton, Loris D'antoni, Alexandra Silva

引用次数: 15

A throughput-centric view of the performance of datacenter topologies 以吞吐量为中心的数据中心拓扑性能视图

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472913

Pooria Namyar, Sucha Supittayapornpong, Mingyang Zhang, Minlan Yu, R. Govindan

{"title":"A throughput-centric view of the performance of datacenter topologies","authors":"Pooria Namyar, Sucha Supittayapornpong, Mingyang Zhang, Minlan Yu, R. Govindan","doi":"10.1145/3452296.3472913","DOIUrl":"https://doi.org/10.1145/3452296.3472913","url":null,"abstract":"While prior work has explored many proposed datacenter designs, only two designs, Clos-based and expander-based, are generally considered practical because they can scale using commodity switching chips. Prior work has used two different metrics, bisection bandwidth and throughput, for evaluating these topologies at scale. Little is known, theoretically or practically, how these metrics relate to each other. Exploiting characteristics of these topologies, we prove an upper bound on their throughput, then show that this upper bound better estimates worst-case throughput than all previously proposed throughput estimators and scales better than most of them. Using this upper bound, we show that for expander-based topologies, unlike Clos, beyond a certain size of the network, no topology can have full throughput, even if it has full bisection bandwidth; in fact, even relatively small expander-based topologies fail to achieve full throughput. We conclude by showing that using throughput to evaluate datacenter performance instead of bisection bandwidth can alter conclusions in prior work about datacenter cost, manageability, and reliability.","PeriodicalId":20487,"journal":{"name":"Proceedings of the 2021 ACM SIGCOMM 2021 Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80954468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

L2D2

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472932

Deepak Vasisht, Jayanth Shenoy, Ranveer Chandra

引用次数: 40

RedPlane: enabling fault-tolerant stateful in-switch applications RedPlane:启用容错的交换机内状态应用

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472905

Daehyeok Kim, J. Nelson, Dan R. K. Ports, V. Sekar, S. Seshan

引用次数: 22

Insights from operating an IP exchange provider 运营IP交换提供商的见解

Proceedings of the 2021 ACM SIGCOMM 2021 Conference Pub Date : 2021-08-09 DOI: 10.1145/3452296.3472930

Andra Lutu, Diego Perino, M. Bagnulo, F. Bustamante

{"title":"Insights from operating an IP exchange provider","authors":"Andra Lutu, Diego Perino, M. Bagnulo, F. Bustamante","doi":"10.1145/3452296.3472930","DOIUrl":"https://doi.org/10.1145/3452296.3472930","url":null,"abstract":"IP Exchange Providers (IPX-Ps) offer to their customers (e.g., mobile or IoT service providers) global data roaming and support for a variety of emerging services. They peer to other IPX-Ps and form the IPX network, which interconnects 800 MNOs worldwide offering their customers access to mobile services in any other country. Despite the importance of IPX-Ps, little is known about their operations and performance. In this paper, we shed light on these opaque providers by analyzing a large IPX-P with more than 100 PoPs in 40+ countries, with a particularly strong presence in America and Europe. Specifically, we characterize the traffic and performance of the main infrastructures of the IPX-P (i.e., 2-3-4G signaling and GTP tunneling), and provide implications for its operation, as well as for the IPX-P's customers. Our analysis is based on statistics we collected during two time periods (i.e., prior and during COVID-19 pandemic) and includes insights on the main service the platform supports (i.e., IoT and data roaming), traffic breakdown and geographical/temporal distribution, communication performance (e.g., tunnel setup time, RTTs). Our results constitute a step towards advancing the understanding of IPX-Ps at their core, and provide guidelines for their operations and customer satisfaction.","PeriodicalId":20487,"journal":{"name":"Proceedings of the 2021 ACM SIGCOMM 2021 Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73961434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0