Although SSDs can be simplified under the current ZNS interface, its counterpart LFS must bear segment compaction overhead. Kyuhwa Han, Sungkyunkwan University and Samsung Electronics; Hyunho Gwak and Dongkun Shin, Sungkyunkwan University; Jooyoung Hwang, Samsung Electronics. As a result, the design of a file system with respect to space management and crash consistency is simplified, requiring only 10.8K LOC for full functionality. Professor Veloso earned a Bachelor and Master of Science degrees in Electrical and Computer Engineering from Instituto Superior Tecnico in Lisbon, Portugal, a Master of Arts in Computer Science from Boston University, and Master of Science and PhD in Computer Science from Carnegie Mellon University. By monitoring the status of each job during training, Pollux models how their goodput (a novel metric we introduce that combines system throughput with statistical efficiency) would change by adding or removing resources. Concretely, Dorylus is 1.22 faster and 4.83 cheaper than GPU servers for massive sparse graphs. To enable FL developers to interpret their results in model testing, Oort enforces their requirements on the distribution of participant data while improving the duration of federated testing by cherry-picking clients. Professor Veloso has been recognized with a multiple honors, including being a Fellow of the ACM, IEEE, AAAS, and AAAI. To this end, we propose GNNAdvisor, an adaptive and efficient runtime system to accelerate various GNN workloads on GPU platforms. Papers must be in PDF format and must be submitted via the submission form. Session Chairs: Nadav Amit, VMware Research Group, and Ada Gavrilovska, Georgia Institute of Technology, Stephen Ibanez, Alex Mallery, Serhat Arslan, and Theo Jepsen, Stanford University; Muhammad Shahbaz, Purdue University; Changhoon Kim and Nick McKeown, Stanford University. Lifting predicates and crash framing make the specification easy to use for developers, and logically atomic crash specifications allow for modular reasoning in GoJournal, making the proof tractable despite complex concurrency and crash interleavings. We present Storm, a web framework that allows developers to build MVC applications with compile-time enforcement of centrally specified data-dependent security policies. The paper review process is double-blind. Prepublication versions of the accepted papers from the summer submission deadline are available below. Uniquely, Dorylus can take advantage of serverless computing to increase scalability at a low cost. Message from the Program Co-Chairs. For example, talks may be shorter than in prior years, or some parts of the conference may be multi-tracked. We have implemented a prototype of our design based on Penglai, an open-sourced enclave system for RISC-V. In this paper, we propose Oort to improve the performance of federated training and testing with guided participant selection. This change is receiving considerable attention in the architecture and security communities, for example, but in contrast, so-called OS researchers are mostly in denial. Using selective profiling, we build DMon, a system that can automatically locate data locality problems in production, identify access patterns that hurt locality, and repair such patterns using targeted optimizations. Petuum Awarded OSDI 2021 Best Paper for Goodput-Optimized Deep Learning Research Petuum CASL research and engineering team's Pollux technical paper on adaptive scheduling for optimized. The 15th USENIX Symposium on Operating Systems Design and Implementation (OSDI '21) will take place as a virtual event on July 1416, 2021. She has a PhD in computer science from MIT. Currently, for large graphs, CPU servers offer the best performance-per-dollar over GPU servers. A hardware-accelerated thread scheduler makes sub-nanosecond decisions, leading to high CPU utilization and low tail response time for RPCs. While verifying GoJournal, we found one serious concurrency bug, even though GoJournal has many unit tests. Horcrux-compliant web servers perform offline analysis of all the JavaScript code on any frame they serve to conservatively identify, for every JavaScript function, the union of the page state that the function could access across all loads of that page. Last year, 70% of accepted OSDI papers participated in the . We demonstrate the above using design, implementation and evaluation of blk-switch, a new Linux kernel storage stack architecture. Our evaluation shows that DistAI successfully verifies 13 common distributed protocols automatically and outperforms alternative methods both in the number of protocols it verifies and the speed at which it does so, in some cases by more than two orders of magnitude. The file system performance of the proposed ZNS+ storage system was 1.33--2.91 times better than that of the normal ZNS-based storage system. Calibrated interrupts increase throughput by up to 35%, reduce CPU consumption by as much as 30%, and achieve up to 37% lower latency when interrupts are coalesced. In this paper, we present P3, a system that focuses on scaling GNN model training to large real-world graphs in a distributed setting. Second, it innovates on the underlying cryptographic machinery and constructs a new private information retrieval scheme, FastPIR, that reduces the time to process oblivious access requests for mailboxes. While several new GNN architectures have been proposed, the scale of real-world graphsin many cases billions of nodes and edgesposes challenges during model training. Using this property, MAGE calculates the memory access pattern ahead of time and uses it to produce a memory management plan. We conclude with a discussion of additional techniques for improving the allocator development process and potential optimization strategies for future memory allocators. We discuss the design and implementation of TEMERAIRE including strategies for hugepage-aware memory layouts to maximize hugepage coverage and to minimize fragmentation overheads. Perennial 2.0 makes this possible by introducing several techniques to formalize GoJournals specification and to manage the complexity in the proof of GoJournals implementation. For general conference information, see https://www.usenix.org/conference/osdi22. She developed the technology for making network routing self-stabilizing, largely self-managing, and scalable. Weak Links in Authentication Chains: A Large-scale Analysis of Email Sender Spoofing Attacks Distributed systems are notoriously hard to implement correctly due to non-determinism. Session Chairs: Ryan Huang, Johns Hopkins University, and Manos Kapritsos, University of Michigan, Jianan Yao, Runzhou Tao, Ronghui Gu, Jason Nieh, Suman Jana, and Gabriel Ryan, Columbia University. For general conference information, see https://www . The biennial ACM Symposium on Operating Systems Principles is the world's premier forum for researchers, developers, programmers, and teachers of computer systems technology. USENIX Security '21 has three submission deadlines. We particularly encourage contributions containing highly original ideas, new approaches, and/or groundbreaking results. Jaehyun Hwang and Midhul Vuppalapati, Cornell University; Simon Peter, UT Austin; Rachit Agarwal, Cornell University. In this paper, we show how to address this inefficiency without requiring pages to be rewritten or browsers to be modified. Submission of a response is optional. Sponsored by USENIX in cooperation with ACM SIGOPS. The NAL eliminates remote PM accesses to hot items without inducing extra local PM accesses. All papers will be available online to registered attendees before the conference. The co-chairs may then share that paper with the workshops organizers and discuss it with them. HotCRP.com signin Sign in using your HotCRP.com account. This fast path contains programmable hardware support for low latency transport and congestion control as well as hardware support for efficient load balancing of RPCs to cores. As a result, data characteristics and device capabilities vary widely across clients. Grand Rapids, Michigan, United States . Writing a correct operating system kernel is notoriously hard. Hence, CLP enables efficient search and analytics on archived logs, something that was impossible without it. 23 artifacts received the Artifacts Functional badge (88%). Existing algorithms are designed to work well for certain workloads. Main conference program: 5-8 April 2022. Welcome to the 2021 USENIX Annual Technical Conference (ATC '21) submissions site! She is the recipient of several best paper awards, the Einstein Chair of the Chinese Academy of Science, the ACM/SIGART Autonomous Agents Research Award, an NSF Career Award, and the Allen Newell Medal for Excellence in Research. The device then "calibrates" its interrupts to completions of latency-sensitive requests. At a high level, Addra follows a template in which callers and callees deposit and retrieve messages from private mailboxes hosted at an untrusted server. We present DistAI, a data-driven automated system for learning inductive invariants for distributed protocols. Even the little publishable OS work that is not based on Linux still assumes the same simplistic hardware model (essentially a multiprocessor VAX) that bears little resemblance to modern reality. Overall, the OSDI PC accepted 31 out of 165 submissions. Jason Mohoney and Roger Waleffe, University of WisconsinMadison; Henry Xu, University of Maryland, College Park; Theodoros Rekatsinas and Shivaram Venkataraman, University of WisconsinMadison. With an aim to improve time-to-accuracy performance in model training, Oort prioritizes the use of those clients who have both data that offers the greatest utility in improving model accuracy and the capability to run training quickly. In 2023 I started another two-year term on the . We built a functional NFSv3 server, called GoNFS, to use GoJournal. Finding the inductive invariant of the distributed protocol is a critical step in verifying the correctness of distributed systems, but takes a long time to do even for simple protocols. One important reason for the high cost is, as we observe in this paper, that many sanitizer checks are redundant the same safety property is repeatedly checked leading to unnecessarily wasted computing resources. ), Program Co-Chairs: Angela Demke Brown, University of Toronto, and Jay Lorch, Microsoft Research. Penglai also reduces the latency of secure memory initialization by three orders of magnitude and gains 3.6x speedup for real-world applications (e.g., MapReduce). We demonstrate that KEVIN reduces the amount of I/O traffic between the host and the device, and remains particularly robust as the system ages and the data become fragmented. Consensus bugs are extremely rare but can be exploited for network split and theft, which cause reliability and security-critical issues in the Ethereum ecosystem. Paper Submission Information All submissions must be received by 11:59 PM AoE (UTC-12) on the day of the corresponding deadline. They collectively make the backup fresh, columnar, and fault-tolerant, even facing millions of concurrent transactions per second. We compare Marius against two state-of-the-art industrial systems on a diverse array of benchmarks. The chairs will review paper conflicts to ensure the integrity of the reviewing process, adding or removing conflicts if necessary. Pollux is implemented and publicly available as part of an open-source project at https://github.com/petuum/adaptdl. For conference information, . SC is being increasingly adopted by industry for a variety of applications. Authors are also encouraged to contact the program co-chairs, osdi21chairs@usenix.org, if needed to relate their OSDI submissions to relevant submissions of their own that are simultaneously under review or awaiting publication at other venues. Our evaluation shows that PET outperforms existing systems by up to 2.5, by unlocking previously missed opportunities from partially equivalent transformations. Consensus bugs are bugs that make Ethereum clients transition to incorrect blockchain states and fail to reach consensus with other clients. Mothy's current research centers on Enzian, a powerful hybrid CPU/FPGA machine designed for research into systems software. Our evaluation on the SPEC benchmarks shows that SanRazor can reduce the overhead of sanitizers significantly, from 73.8% to 28.062.0% for AddressSanitizer, and from 160.1% to 36.6124.4% for UndefinedBehaviorSanitizer (depending on the applied reduction scheme).
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