Existing decentralized systems like Steemit, OpenBazaar, and the growing number of blockchain apps provide alternatives to existing services. Today, privacy controls are enforced by data curators with full access to data in the clear. 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. In contrast, CLP achieves significantly higher compression ratio than all commonly used compressors, yet delivers fast search performance that is comparable or even better than Elasticsearch and Splunk Enterprise. Instead, we propose addressing the root cause of the heuristics problem by allowing software to explicitly specify to the device if submitted requests are latency-sensitive. Our evaluation shows that NrOS scales to 96 cores with performance that nearly always dominates Linux at scale, in some cases by orders of magnitude, while retaining much of the simplicity of a sequential kernel. Lukas Burkhalter, Nicolas Kchler, Alexander Viand, Hossein Shafagh, and Anwar Hithnawi, ETH Zrich. 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. The conference papers and full proceedings are available to registered attendees now and will be available to everyone beginning Wednesday, July 14, 2021. In this paper, we propose Oort to improve the performance of federated training and testing with guided participant selection. CLP's gains come from using a tuned, domain-specific compression and search algorithm that exploits the significant amount of repetition in text logs. Widely used log-search tools like Elasticsearch and Splunk Enterprise index the logs to provide fast search performance, yet the size of the index is within the same order of magnitude as the raw log size. Sijie Shen, Rong Chen, Haibo Chen, and Binyu Zang, Institute of Parallel and Distributed Systems, Shanghai Jiao Tong University; Shanghai Artificial Intelligence Laboratory; Engineering Research Center for Domain-specific Operating Systems, Ministry of Education, China. Mothy joined the Computer Science Department ETH Zurich in January 2007 and was named Fellow of the ACM in 2013 for contributions to operating systems and networking research. Kernel code requires manual memory management and type-unsafe code and must efficiently handle complex, asynchronous events. As a member of ACCT, I have served two years on the bylaws and governance committee and two years on the finance and audit committee. DeSearch uses trusted hardware to build a network of workers that execute a pipeline of small search engine tasks (crawl, index, aggregate, rank, query). This is especially true for DPF over Rnyi DP, a highly composable form of DP. Consensus bugs are bugs that make Ethereum clients transition to incorrect blockchain states and fail to reach consensus with other clients. Timothy Roscoe is a Full Professor in the Systems Group of the Computer Science Department at ETH Zurich, where he works on operating systems, networks, and distributed systems, and is currently head of department. Evaluations show that Vegito can perform 1.9 million TPC-C NewOrder transactions and 24 TPC-H-equivalent queries per second simultaneously, which retain the excellent performance of specialized OLTP and OLAP counterparts (e.g., DrTM+H and MonetDB). The OSDI Symposium emphasizes innovative research as well as quantified or insightful experiences in systems design and implementation. Memory allocation represents significant compute cost at the warehouse scale and its optimization can yield considerable cost savings. Camera-ready submission (all accepted papers): 15 Mars 2022. The papers will be available online to everyone beginning on the first day of the conference, July 14, 2021. DistAI generates data by simulating the distributed protocol at different instance sizes and recording states as samples. 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. Welcome to the SOSP 2021 Website. We focus on NVMe storage devices and show that it is natural to express these semantics in the kernel and the application and only requires a modest two-bit change to the device interface. blk-switch uses this insight to adapt techniques from the computer networking literature (e.g., multiple egress queues, prioritized processing of individual requests, load balancing, and switch scheduling) to the Linux kernel storage stack. Machine learning (ML) models trained on personal data have been shown to leak information about users. VLDB 2021: Venue Tivoli Hotel & Congress Center Arni Magnussons Gade 2 1577 Copenhagen, Denmark +45 3268 4300 In-person attendees can purchase tickets for the park / gardens with a 15% discount, which is a special offer by Tivoli Hotel & Congress Center to VLDB 2021 attendees. In this paper, we present Vegito, a distributed in-memory HTAP system that embraces freshness and performance with the following three techniques: (1) a lightweight gossip-style scheme to apply logs on backups consistently; (2) a block-based design for multi-version columnar backups; (3) a two-phase concurrent updating mechanism for the tree-based index of backups. 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). However, with the increasingly speedy transactions and queries thanks to large memory and fast interconnect, commodity HTAP systems have to make a tradeoff between data freshness and performance degradation. Session Chairs: Dushyanth Narayanan, Microsoft Research, and Gala Yadgar, TechnionIsrael Institute of Technology, Jinhyung Koo, Junsu Im, Jooyoung Song, and Juhyung Park, DGIST; Eunji Lee, Soongsil University; Bryan S. Kim, Syracuse University; Sungjin Lee, DGIST. The chairs will review paper conflicts to ensure the integrity of the reviewing process, adding or removing conflicts if necessary. The biennial ACM Symposium on Operating Systems Principles is the world's premier forum for researchers, developers, programmers, and teachers of computer systems technology. Such centralized engines are in a perfect position to censor content and violate users privacy, undermining some of the key tenets behind decentralization. The overhead of GPT is 5% for memory-intensive workloads (e.g., Redis) and negligible for CPU-intensive workloads (e.g., RV8 and Coremarks). HotNets provides a venue for discussing innovative ideas and for debating future research agendas in networking. Author Response Period (Oct 2018) Awarded an Intel Faculty Grant for Research on automated performance optimization (Sep. 2018) Our paper on Foreshadow is accepted to appear at USENIX Security. For example, traditional compute resources are replenishable while privacy is not: a CPU can be regained after a model finishes execution while privacy budget cannot. The full program will be available in May 2021. They collectively make the backup fresh, columnar, and fault-tolerant, even facing millions of concurrent transactions per second. Prior or concurrent publication in non-peer-reviewed contexts, like arXiv.org, technical reports, talks, and social media posts, is permitted. 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 wire-to-wire RPC response time through the nanoPU is just 69ns, an order of magnitude quicker than the best-of-breed, low latency, commercial NICs. The key insight guiding our design is computation separation. We present case studies and end-to-end applications that show how Storm lets developers specify diverse policies while centralizing the trusted code to under 1% of the application, and statically enforces security with modest type annotation overhead, and no run-time cost. AI enables principled representation of knowledge, complex strategy optimization, learning from data, and support to human decision making. 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. Ankit Bhardwaj and Chinmay Kulkarni, University of Utah; Reto Achermann, University of British Columbia; Irina Calciu, VMware Research; Sanidhya Kashyap, EPFL; Ryan Stutsman, University of Utah; Amy Tai and Gerd Zellweger, VMware Research. Submissions violating the detailed formatting and anonymization rules will not be considered for review. This paper presents Zeph, a system that enables users to set privacy preferences on how their data can be shared and processed. Proceedings Front Matter The hybrid segment recycling chooses a proper block reclaiming policy between segment compaction and threaded logging based on their costs. All deadline times are 23:59 hrs UTC. Welcome to the 2021 USENIX Annual Technical Conference (ATC '21) submissions site! Submitted papers must be no longer than 12 single-spaced 8.5 x 11 pages, including figures and tables, plus as many pages as needed for references, using 10-point type on 12-point (single-spaced) leading, two-column format, Times Roman or a similar font, within a text block 7 wide x 9 deep. In some cases, the quality of these artifacts is as important as that of the document itself. This motivates the need for a new approach to data privacy that can provide strong assurance and control to users. Fan Lai, Xiangfeng Zhu, Harsha V. Madhyastha, and Mosharaf Chowdhury, University of Michigan. Questions? Papers accompanied by nondisclosure agreement forms will not be considered. For realistic workloads, KEVIN improves throughput by 68% on average. This yielded 6% fewer TLB miss stalls, and 26% reduction in memory wasted due to fragmentation. In this talk, I'll speculate on how we came to this unfortunate state of affairs, and what might be done to fix it. However, your OSDI submission must use an anonymized name for your project or system that differs from any used in such contexts. Grand Rapids, Michigan, United States . One classical approach is to increase the efficiency of an allocator to minimize the cycles spent in the allocator code. Distributed Trust: Is Blockchain the answer? 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. Of the 26 submitted artifacts: 26 artifacts received the Artifacts Available badge (100%). Additionally, there is no assurance that data processing and handling comply with the claimed privacy policies. Sat, Aug 7, 2021 3 min read researches review. Owing to the sequential write-only zone scheme of the ZNS, the log-structured file system (LFS) is required to access ZNS solid-state drives (SSDs). These are hard deadlines, and no extensions will be given. Just using Lambdas on top of CPU servers offers up to 2.75 more performance-per-dollar than training only with CPU servers. And yet, they continue to rely on centralized search engines and indexers to help users access the content they seek and navigate the apps. Devices employ adaptive interrupt coalescing heuristics that try to balance between these opposing goals. Alas, existing profiling techniques incur high overhead when used to identify data locality problems and cannot be deployed in production, where programs may exhibit previously-unseen performance problems. We observe that scalability challenges in training GNNs are fundamentally different from that in training classical deep neural networks and distributed graph processing; and that commonly used techniques, such as intelligent partitioning of the graph do not yield desired results. Fortunately, we observe that the backups for high availability in modern distributed OLTP systems can be retrofitted to bridge the analytical queries and transactions in HTAP workloads. This is the first OSDI in an odd year as OSDI moves to a yearly cadence. All papers will be available online to registered attendees before the conference. DeSearch then introduces a witness mechanism to make sure the completed tasks can be reused across different pipelines, and to make the final search results verifiable by end users. We also verified a simple NFS server using GoJournals specs, which confirms that they are helpful for application verification: a significant part of the proof doesnt have to consider concurrency and crashes. Last year, 70% of accepted OSDI papers participated in the . For any further information, please contact the PC chairs: pc-chairs-2022@eurosys.org. Moreover, as of October 2020, a review of the 50 most cited empirical papers that list personality as a keyword indicates that all 50 papers were authored by people with insti tutional affiliations in the United States, Canada, Germany, the UK, and New Zealand, and only three papers included samples outside of these regions (see Supplementary For more details on the submission process, and for templates to use with LaTeX, Word, etc., authors should consult the detailed submission requirements. Researchers from the Software Systems Laboratory bagged Best Paper Awards at the 15th USENIX Symposium on Operating Systems Design and Implementation (OSDI 2021) and the 2021 USENIX Annual Technical Conference (USENIX ATC 2021).. Jay Lepreau Best Paper Award, OSDI'21. Pollux improves scheduling performance in deep learning (DL) clusters by adaptively co-optimizing inter-dependent factors both at the per-job level and at the cluster-wide level. Poor data locality hurts an application's performance. We evaluate PrivateKube and DPF on microbenchmarks and an ML workload on Amazon Reviews data. Radia Perlman is a Fellow at Dell Technologies. Upon these two primitives, our system can scale to thousands of concurrent enclaves with high resource utilization and eliminate the high-cost initialization of secure memory using fork-style enclave creation without weakening the security guarantees. With her students, she had led research in AI, with a focus on robotics and machine learning, having concretely researched and developed a variety of autonomous robots, including teams of soccer robots, and mobile service robots. . Computation separation makes it possible to construct a deep, bounded-asynchronous pipeline where graph and tensor parallel tasks can fully overlap, effectively hiding the network latency incurred by Lambdas. In addition, increasing CPU core counts further complicate kernel development. For conference information, see: . Ethereum is the second-largest blockchain platform next to Bitcoin. 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. JEL codes: Q18, Q28, Q57 . We built a functional NFSv3 server, called GoNFS, to use GoJournal. Authors must make a good faith effort to anonymize their submissions, and they should not identify themselves or their institutions either explicitly or by implication (e.g., through the references or acknowledgments). After three years working on web-based collaboration systems at a startup in North Carolina, he joined Sprint's Advanced Technology Lab in Burlingame, California, in 1998, working on cloud computing and network monitoring. We observe that, due to their intended security guarantees, SC schemes are inherently oblivioustheir memory access patterns are independent of the input data. Notification of conditional accept/reject for revisions: 3 March 2022. Simultaneous submission of the same work to multiple venues, submission of previously published work, or plagiarism constitutes dishonesty or fraud. DMons targeted optimizations provide 16.83% speedup on average (up to 53.14%), compared to a baseline that uses the highest level of compiler optimization. P3 exposes a simple API that captures many different classes of GNN architectures for generality. Third, GNNAdvisor capitalizes on the GPU memory hierarchy for acceleration by gracefully coordinating the execution of GNNs according to the characteristics of the GPU memory structure and GNN workloads. Session Chairs: Gennady Pekhimenko, University of Toronto / Vector Institute, and Shivaram Venkataraman, University of WisconsinMadison, Aurick Qiao, Petuum, Inc. and Carnegie Mellon University; Sang Keun Choe and Suhas Jayaram Subramanya, Carnegie Mellon University; Willie Neiswanger, Petuum, Inc. and Carnegie Mellon University; Qirong Ho, Petuum, Inc.; Hao Zhang, Petuum, Inc. and UC Berkeley; Gregory R. Ganger, Carnegie Mellon University; Eric P. Xing, MBZUAI, Petuum, Inc., and Carnegie Mellon University. Camera-ready submission (all accepted papers): 2 April 2021; Main conference program: 27-28 April 2021; All deadline times are . She also has made contributions in network security, including scalable data expiration, distributed algorithms despite malicious participants, and DDOS prevention techniques. Zeph executes privacy-adhering data transformations in real-time and scales to thousands of data sources, allowing it to support large-scale low-latency data stream analytics. If in doubt about whether your submission to OSDI 2021 and your upcoming submission to SOSP are the same paper or not, please contact the PC chairs by email. When uploading your OSDI 2021 reviews for your submission to SOSP, you can optionally append a note about how you addressed the reviews and comments. Password All the times listed below are in Pacific Daylight Time (PDT). Proceedings Cover | The 15th USENIX Symposium on Operating Systems Design and Implementation (OSDI '21) will take place as a virtual event on July 1416, 2021. Our evaluation shows that, compared to existing participant selection mechanisms, Oort improves time-to-accuracy performance by 1.2X-14.1X and final model accuracy by 1.3%-9.8%, while efficiently enforcing developer-specified model testing criteria at the scale of millions of clients. Call for Papers. 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. Title Page, Copyright Page, and List of Organizers | Mothy received a PhD in 1995 from the Computer Laboratory of the University of Cambridge, where he was a principal designer and builder of the Nemesis OS. MAGE outperforms the OS virtual memory system by up to an order of magnitude, and in many cases, runs SC computations that do not fit in memory at nearly the same speed as if the underlying machines had unbounded physical memory to fit the entire computation. Professor Veloso is on leave from Carnegie Mellon University as the Herbert A. Simon University Professor in the School of Computer Science, and the past Head of the Machine Learning Department. We introduce a hybrid cryptographic protocol for privacy-adhering transformations of encrypted data. She is the author of the textbook Interconnections (about network layers 2 and 3) and coauthor of Network Security. Authors are required to register abstracts by 3:00 p.m. PST on December 3, 2020, and to submit full papers by 3:00 p.m. PST on December 10, 2020. These limitations require state-of-the-art systems to distribute training across multiple machines. The symposium emphasizes innovative research as well as quantified or insightful experiences in systems design and implementation. If the conference registration fee will pose a hardship for the presenter of the accepted paper, please contact conference@usenix.org. NrOS replicates kernel state on each NUMA node and uses operation logs to maintain strong consistency between replicas. In this paper, we present P3, a system that focuses on scaling GNN model training to large real-world graphs in a distributed setting. While compiler-based techniques have been proposed to improve data locality, they depend on heuristics, which can sometimes hurt performance. This approach misses possible optimization opportunities as transformations that only preserve equivalence on subsets of the output tensors are excluded. She also invented the spanning tree algorithm, which transformed Ethernet from a technology that supported a few hundred nodes, to something that can support large networks. We particularly encourage contributions containing highly original ideas, new approaches, and/or groundbreaking results. While verifying GoJournal, we found one serious concurrency bug, even though GoJournal has many unit tests. Here, we focus on hugepage coverage. 23 artifacts received the Artifacts Functional badge (88%). However, a plethora of recent data breaches show that even widely trusted service providers can be compromised. 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. These results outperform state-of-the-art HTAP systems by several orders of magnitude on transactional performance, while just incurring little performance slowdown (5% over pure OLTP workloads) and still enjoying data freshness for analytical queries (less than 20 ms of maximum delay) in the failure-free case. Sanitizers detect unsafe actions such as invalid memory accesses by inserting checks that are validated during a programs execution. To achieve low overhead, selective profiling gathers runtime execution information selectively and incrementally. Attaching supplementary material is optional; if your paper says that you have source code or formal proofs, you need not attach them to convince the PC of their existence. We present selective profiling, a technique that locates data locality problems with low-enough overhead that is suitable for production use. We conclude with a discussion of additional techniques for improving the allocator development process and potential optimization strategies for future memory allocators. For instance, the following are not sufficient grounds to specify a conflict with a PC member: they have reviewed the work before, they are employed by your competitor, they are your personal friend, they were your post-doc advisor or advisee, or they had the same advisor as you. In 2023 I started another two-year term on the . A scientific paper consists of a constellation of artifacts that extend beyond the document itself: software, hardware, evaluation data and documentation, raw survey results, mechanized proofs, models, test suites, benchmarks, and so on. Hence, kernel developers are constantly refining synchronization within OS kernels to improve scalability at the risk of introducing subtle bugs. Pages should be numbered, and figures and tables should be legible in black and white, without requiring magnification. Sam Kumar, David E. Culler, and Raluca Ada Popa, University of California, Berkeley. A glance at this year's OSDI program shows that Operating Systems are a small niche topic for this conference, not even meriting their own full session. In particular, I'll argue for re-engaging with what computer hardware really is today and give two suggestions (among many) about how the OS research community can usefully do this, and exploit what is actually a tremendous opportunity. For example, optimistic concurrency control (OCC) is better than two-phase-locking (2PL) under low contention, while the converse is true under high contention. Message from the Program Co-Chairs. Evaluation on a four-node machine with Optane DC Persistent Memory shows that Nap can improve the throughput by up to 2.3 and 1.56 under write-intensive and read-intensive workloads, respectively. Academic and industrial participants present research and experience papers that cover the full range of theory and practice of computer .
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