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Optimize the TX Architecture of RDMA NIC for Performance Isolation in the Cloud Environment 23

Optimize the TX Architecture of RDMA NIC for Performance Iso...

引用

33rd Great Lakes symposium on VLSI (GLSVLSI)

作者： Liao, Yunkun Wu, Jingya Lu, Wenyan Li, Xiaowei Yan, Guihai Chinese Acad Sci State Key Lab Processors Inst Comp Technol Beijing Peoples R China Univ Chinese Acad Sci Beijing Peoples R China

ISBN: (纸本)9798400701252

Remote Direct Memory Access (RDMA) is a promising technology for achieving low latency and high bandwidth access to remote memory. However, performance interference exists when multiple tenants share an RDMA Network interface Card (RNIC) in the cloud environment. Although some initial studies have investigated the root cause and possible solutions to RDMA performance interference, there is no research to analyze and solve the performance interference from the RNIC architecture. Compared with the existing software approach, optimizing RNIC architecture can introduce less performance and CPU overhead. This paper addresses performance isolation by modeling, analyzing, and optimizing the transmit-side (TX) RNIC architecture. First, we introduce a baseline TX RNIC architecture to explain the existing performance interference. Then, we propose separate caching and slicing execution to avoid the bandwidth-sensitive tenants affecting latency-sensitive tenants. Later, we add isolated backpressure and adaptiveWeighted Round-robin scheduling to ensure the bandwidth-sensitive tenants share the bandwidth equally. Our experiments show that these optimizations achieve near-optimal performance isolation.

关键词： Architecture Design Network interface Card (NIC) Remote Direct Memory Access (RDMA) Performance Isolation

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Midair Balloon interface: A Soft and Lightweight Midair Object for Proximate Interactions 21

Midair Balloon Interface: A Soft and Lightweight Midair Obje...

引用

34th Annual acm symposium on user interface software and technology, UIST 2021

作者： Furumoto, Takuro Kasai, Takumi Fujiwara, Masahiro Makino, Yasutoshi Shinoda, Hiroyuki Graduate School of Frontier Sciences The University of Tokyo Japan

ISBN: (纸本)9781450386357

This paper introduces a midair balloon interface, a fast and soft interactive object in mid-air. Our approach tackles the trade-off between safety and speed by controlling a soft helium-filled balloon with external actuators and sensors. We developed a prototype system that uses airborne ultrasound phased arrays to propel a balloon and high-speed stereo cameras to track its motion. This configuration realizes both a high thrust/weight ratio and such a soft body that is safe-to-collide. We describe a sight-based interaction and a touch-based interaction that leverage the safety and speed of a midair balloon interface. A sight-based interaction allows the user to keep the object inside her/his view within reach by controlling a balloon to follow the direction of the user's face. A touch-based interaction allows the user to manipulate the object directly with his/her hand, issue a command by moving his/her finger on the surface, and receive vibrotactile feedback produced by vibrating the balloon with amplitude-modulated ultrasound. We describe the implementation and evaluation of the prototype and explore the application scenarios. © 2021 Owner/Author.

关键词： Ultrasonics

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Automatic Instructional Video Creation from a Markdown-Formatted Tutorial 21

Automatic Instructional Video Creation from a Markdown-Forma...

引用

34th Annual acm symposium on user interface software and technology, UIST 2021

作者： Chi, Peggy Frey, Nathan Panovich, Katrina Essa, Irfan Google Research United States Google United States Georgia Institute of Technology United States

ISBN: (纸本)9781450386357

We introduce HowToCut, an automatic approach that converts a Markdown-formatted tutorial into an interactive video that presents the visual instructions with a synthesized voiceover for narration. HowToCut extracts instructional content from a multimedia document that describes a step-by-step procedure. Our method selects and converts text instructions to a voiceover. It makes automatic editing decisions to align the narration with edited visual assets, including step images, videos, and text overlays. We derive our video editing strategies from an analysis of 125 web tutorials and apply Computer Vision techniques to the assets. To enable viewers to interactively navigate the tutorial, HowToCut's conversational UI presents instructions in multiple formats upon user commands. We evaluated our automatically-generated video tutorials through user studies (N=20) and validated the video quality via an online survey (N=93). The evaluation shows that our method was able to effectively create informative and useful instructional videos from a web tutorial document for both reviewing and following. © 2021 Owner/Author.

关键词： Quality control

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NVMeVirt: A Versatile software-defined Virtual NVMe Device 21

NVMeVirt: A Versatile Software-defined Virtual NVMe Device

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21st USENIX Conference on File and Storage Technologies (FAST)

作者： Kim, Sang-Hoon Shim, Jaehoon Lee, Euidong Jeong, Seongyeop Kang, Ilkueon Kim, Jin-Soo Ajou Univ Suwon South Korea Seoul Natl Univ Seoul South Korea

ISBN: (纸本)9781939133328

There have been drastic changes in the storage device landscape recently. At the center of the diverse storage landscape lies the NVMe interface, which allows high-performance and flexible communication models required by these next-generation device types. However, its hardware-oriented definition and specification are bottlenecking the development and evaluation cycle for new revolutionary storage devices. In this paper, we present NVMeVirt, a novel approach to facilitate software-defined NVMe devices. A user can define any NVMe device type with custom features, and NVMeVirt allows it to bridge the gap between the host I/O stack and the virtual NVMe device in software. We demonstrate the advantages and features of NVMeVirt by realizing various storage types and configurations, such as conventional SSDs, low-latency high-bandwidth NVM SSDs, zoned namespace SSDs, and key-value SSDs with the support of PCI peer-to-peer DMA and NVMe-oF target offloading. We also make cases for storage research with NVMeVirt, such as studying the performance characteristics of database engines and extending the NVMe specification for the improved key-value SSD performance.

关键词： Specifications

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SHELTER: Extending Arm CCA with Isolation in user Space 32

SHELTER: Extending Arm CCA with Isolation in User Space

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32nd USENIX Security symposium

作者： Zhang, Yiming Hu, Yuxin Ning, Zhenyu Zhang, Fengwei Luo, Xiapu Huang, Haoyang Yan, Shoumeng He, Zhengyu Southern Univ Sci & Technol Res Inst Trustworthy Autonomous Syst Shenzhen Peoples R China Southern Univ Sci & Technol Dept Comp Sci & Engn Shenzhen Peoples R China Hong Kong Polytech Univ Dept Comp Hong Kong Peoples R China Hunan Univ Coll Comp Sci & Elect Engn Changsha Peoples R China Ant Grp Hangzhou Peoples R China

ISBN: (纸本)9781939133373

The increasing adoption of confidential computing is providing individual users with a more seamless interaction with numerous mobile and server devices. TrustZone is a promising security technology for the use of partitioning sensitive private data into a trusted execution environment (TEE). Unfortunately, third-party developers have limited accessibility to TrustZone. This is because TEE vendors need to validate such security applications to preserve their security rigorously. Moreover, TrustZone-based systems suffer from vulnerabilities affecting Trusted App and trusted OS, possibly causing the entire system to be compromised. Advanced virtualization-based TEE introduced in the recently new concept of Confidential Compute Architecture (CCA) creates a new physical address space called Realm world for confidential computing to protect the data confidentiality and integrity. The current version of CCA primarily targets the VM level in the Realm world and does not provide user-level isolated environments. To fill up this gap, we present SHELTER, which is a complement to CCA's primary Realm VM-style architecture. SHELTER allows thirdparty developers to deploy their applications with isolation in userspace. SHELTER is designed by cooperating with Arm CCA hardware primitive available in Armv9.2 to provide hardware-based isolation while removing the need for software workloads to trust their data to a Host OS, hypervisor, or privileged software (e.g., trusted OS, Secure/Realm hypervisor). We have implemented and evaluated SHELTER, and the results demonstrated that SHELTER guarantees the security of applications with a modest performance overhead (<15%) on real-world workloads.

关键词： ARM processors

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Do We Need a Faster Mouse? Empirical Evaluation of Asynchronicity-Induced Jitter 21

Do We Need a Faster Mouse? Empirical Evaluation of Asynchron...

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34th Annual acm symposium on user interface software and technology, UIST 2021

作者： Ham, Auejin Lim, Junsu Kim, Sunjun Korea Advanced Institute of Science and Technology Korea Republic of Daegu Gyeongbuk Institute of Science and Technology Korea Republic of

ISBN: (纸本)9781450386357

In gaming, accurately rendering input signals on a display is crucial, both spatially and temporally. However, the asynchronicity between the input and output signal frequencies results in unstable responses called jitter. A recent research modeled this jitter mathematically [2];however, the effect of jitter on human performance is unknown. In this study, we investigated the empirical effect of asynchronicity-induced jitter using a state-of-the-art high-performance mouse and monitor device. In the first part, perceptual user experience under different jitter levels was examined using the ISO 4120:2004 triangle test protocol, and a jitter of over 0.3 ms could be perceived by sensitive subjects. In the second part, we measured the pointing task performance for different jitter levels using the ISO 9241-9 (i.e., Fitts' law) test, and found that the pointing performance was unaffected up to a jitter of 1 ms. Finally, we recommended display and mouse combinations based on our results, which indicated the need for a higher mouse polling rate than that of the current standard 1000-Hz USB mouse. © 2021 acm.

关键词： Jitter

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Technical Factors Affecting Augmented Reality user Experiences in Sports Spectating 21

Technical Factors Affecting Augmented Reality User Experienc...

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27th acm symposium on Virtual Reality software and technology (VRST)

作者： Lo, Wei Hong Regenbrecht, Holger Zollmann, Stefanie Univ Otago Dunedin New Zealand

ISBN: (纸本)9781450390927

The maturity of augmented reality (AR) technology and research now paves the way for dissemination of AR outside of the laboratory. However, it is still under-explored which factors are influencing the user experience of an AR application. In this poster, we describe some of the technical factors that could influence the user experience. We focus on a use-case in the field of on-site sports spectating with mobile AR. We present a study design which analyzes the influence of latency, registration accuracy, and jitter as factors on AR user experience.

关键词： augmented reality situated visualization user experience

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CUBENAV: AN OPERATIONAL FLIGHT DYNAMICS TOOL TO SUPPORT GUIDANCE AND NAVIGATION OF DEEP-SPACE CUBESATS

CUBENAV: AN OPERATIONAL FLIGHT DYNAMICS TOOL TO SUPPORT GUID...

引用

2024 IAF Space Operations symposium at the 75th International Astronautical Congress, IAC 2024

作者： Morselli, Alessandro Lombardo, Marco Muylle, Julia Casajus, Luis Gomez Locarini, Alfredo Maggi, Marco Zannoni, Marco Cottini, Valeria Ciabuschi, Simone Natalucci, Silvia Dept. of Aerospace Science and Technology Politecnico di Milano Via La Masa 34 Milano20156 Italy Dept. of Industrial Engineering Università di Bologna Via Fontanelle Forlì47121 Italy Agenzia Spaziale Italiana Via del Politecnico snc Roma00133 Italy

ISBN: (纸本)9798331312183

CubeNav, a project funded by ASI within the ALCOR program, aims to develop a tailored Flight Dynamics infrastructure to support CubeSats' GNC operations in deep-space missions. Led by the Radio Science and Planetary Exploration Lab at the University of Bologna (Unibo) in collaboration with the DART Lab at Politecnico di Milano, CubeNav leverages the expertise of both teams, with Unibo focusing on navigation analysis and DART Lab on guidance tools. Both teams were involved in many deep-space CubeSat missions: Unibo navigated LICIACube and ArgoMoon, while DART Lab led the phase B study of LUMIO and contributed to the GNC development of HERA's Milani CubeSat. CubeNav aims to streamline the planning, engineering, and validation of Flight Dynamics operations, reducing human intervention. Eliminating repetitive tasks performed by the operators could substantially contribute in reducing the learning curve, human error, and time required for scenario setting and data analysis. This is pivotal to achieve cost-effective ground-based navigation of deep-space CubeSats. The software architecture is outlined, focusing on its modular design, also detailing the external dependencies like ESA's GODOT. Three functional blocks constitute CubeNav: interface and data format conversion, flight dynamics, and the Graphical user interface (GUI) The first layer standardizes communication between Unibo and DART proprietary tools. The flight dynamics layer, coded in CH-h and Python, encompasses navigation and guidance tools, enabling orbit determination and trajectory analysis. The GUI serves as a user-friendly interface, facilitating parameter input, output selection, and data visualization, thereby aiding operator interaction and task automation. The GUI includes a tool dedicated to radiometric data processing and residual computations, pivotal for handling and analyzing mission-collected radiometric data, and for assessing navigation solution accuracy. Additionally, it offers visualization

关键词： Graphical user interfaces

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Screen2Words: Automatic Mobile UI Summarization with Multimodal Learning 21

Screen2Words: Automatic Mobile UI Summarization with Multimo...

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34th Annual acm symposium on user interface software and technology, UIST 2021

作者： Wang, Bryan Li, Gang Zhou, Xin Chen, Zhourong Grossman, Tovi Li, Yang Department of Computer Science University of Toronto Canada Google Research United States Google United States

ISBN: (纸本)9781450386357

Mobile user interface Summarization generates succinct language descriptions of mobile screens for conveying important contents and functionalities of the screen, which can be useful for many language-based application scenarios. We present Screen2Words, a novel screen summarization approach that automatically encapsulates essential information of a UI screen into a coherent language phrase. Summarizing mobile screens requires a holistic understanding of the multi-modal data of mobile UIs, including text, image, structures as well as UI semantics, motivating our multi-modal learning approach. We collected and analyzed a large-scale screen summarization dataset annotated by human workers. Our dataset contains more than 112k language summarization across ∼22k unique UI screens. We then experimented with a set of deep models with different configurations. Our evaluation of these models with both automatic accuracy metrics and human rating shows that our approach can generate high-quality summaries for mobile screens. We demonstrate potential use cases of Screen2Words and open-source our dataset and model to lay the foundations for further bridging language and user interfaces. © 2021 Owner/Author.

关键词： user interfaces

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LipNotif: Use of Lips as a Non-Contact Tactile Notification interface Based on Ultrasonic Tactile Presentation 21

LipNotif: Use of Lips as a Non-Contact Tactile Notification ...

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34th Annual acm symposium on user interface software and technology, UIST 2021

作者： Jingu, Arata Kamigaki, Takaaki Fujiwara, Masahiro Makino, Yasutoshi Shinoda, Hiroyuki The University of Tokyo Japan

ISBN: (纸本)9781450386357

We propose LipNotif, a non-contact tactile notification system that uses airborne ultrasound tactile presentation to lips. Lips are suitable for non-contact tactile notifications because they have high tactile sensitivity comparable to the palms, are less occupied in daily life, and are constantly exposed outward. LipNotif uses tactile patterns to intuitively convey information to users, allowing them to receive notifications using only their lips, without sight, hearing, or hands. We developed a prototype system that automatically recognizes the position of the lips and presents non-contact tactile sensations. Two experiments were conducted to evaluate the feasibility of LipNotif. In the first experiment, we found that directional information can be notified to the lips with an average accuracy of ± 11.1° in the 120° horizontal range. In the second experiment, we could elicit significantly different affective responses by changing the stimulus intensity. The experimental results indicated that LipNotif is practical for conveying directions, emotions, and combinations of them. LipNotif can be applied for various purposes, such as notifications during work, calling in the waiting room, and tactile feedback in automotive user interfaces. © 2021 Owner/Author.

关键词： Conveying

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