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检索条件"任意字段=Proceedings of the 43rd ACM Symposium on Principles of Distributed Computing"

共 92 条记录，以下是21-30 订阅

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The weakest failure detectors to solve certain fundamental problems in distributed computing 04

The weakest failure detectors to solve certain fundamental p...

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proceedings of the 23rd Annual acm symposium on principles of distributed computing

作者： Delporte-Gallet, Carole Hadzilacos, Vassos Fauconnier, Hugues Kouznetsov, Petr Guerraoui, Rachid Toueg, Sam LIAFA Université Paris 7 France Department of Computer Science University of Toronto Canada Distributed Programming Laboratory EPFL Switzerland

ISBN: (纸本)9781581138023

We determine the weakest failure detectors to solve several fundamental problems in distributed message-passing systems, for all environments - i.e., regardless of the number and timing of crashes. The problems that we consider are: implementing an atomic register, solving consensus, solving quittable consensus (a variant of consensus in which processes have the option to decide 'quit' if a failure occurs), and solving non-blocking atomic commit.

关键词： distributed computer systems

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How fast can a distributed atomic read be? 04

How fast can a distributed atomic read be?

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proceedings of the 23rd Annual acm symposium on principles of distributed computing

作者： Dutta, Partha Guerraoui, Rachid Levy, Ron R. Chakraborty, Arindam Distributed Programming Laboratory EPFL CH-1015 Lausanne Switzerland

ISBN: (纸本)9781581138023

This paper addresses the problem of designing an efficient implementation of a basic atomic read-write data structure over an asynchronous message-passing system. In particular, we consider time-efficient implementations of this abstraction in the case of a single writer, multiple readers (also called a SWMR atomic register) and S servers: the writer, the readers, and t out of the S servers may fail by crashing. Previous implementations tolerate the failure of any minority of servers (i.e., t

关键词： distributed computer systems

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STOC'11 - proceedings of the 43rd acm symposium on Theory of computing

STOC'11 - Proceedings of the 43rd ACM Symposium on Theory of...

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ISBN: (纸本)9781450306911

The proceedings contain 84 papers. The topics discussed include: social networks spread rumors in sublogarithmic time;quantum one-way communication can be exponentially stronger than classical communication;cover times, blanket times, and majorizing measures;the equivalence of the random oracle model and the ideal cipher model, revisited;limits of provable security from standard assumptions;an impossibility result for truthful combinatorial auctions with submodular valuations;towards coding for maximum errors in interactive communication;rank-1 bimatrix games: a homeomorphism and a polynomial time algorithm;pseudorandom generators for combinatorial shapes;electrical flows, Laplacian systems, and faster approximation of maximum flow in undirected graphs;subexponential lower bounds for randomized pivoting rules for the simplex algorithm;distributed verification and hardness of distributed approximation;and the topology of wireless communication.

关键词： Approximation algorithms

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Experimental Validation of a Performance Model for a distributed Recoverable Boeing 747 Flight Control System Subject to Digital Upsets

Experimental Validation of a Performance Model for a Distrib...

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SSST 2011 - 43rd IEEE Southeastern symposium on System Theory

作者： Wang, Rui Gray, W. Steven Gonzalez, Oscar R. Old Dominion Univ Dept Elect & Comp Engn Norfolk VA 23529 USA

ISBN: (纸本)9781424495931

This paper describes a High Intensity Radiated Fields experiment conducted at the NASA Langley Research Center to validate a tracking performance model for a Boeing 747 digital flight control system implemented on a distributed recoverable computing platform which is subject to upsets. While the upset data does not appear to be Markov, it is found that a burst model for the upset process can be introduced so that a Markov jump-linear performance model can reliably provide an upper bound on the tracking error of the system.

关键词： Flight control systems

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Universally Optimal Information Dissemination and Shortest Paths in the HYBRID distributed Model 24

Universally Optimal Information Dissemination and Shortest P...

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43rd acm SIGACT-SIGOPS symposium on principles of distributed computing, PODC 2024

作者： Chang, Yi-Jun Hecht, Oren Leitersdorf, Dean Schneider, Philipp National University of Singapore Singapore Technion Israel University of Bern Switzerland

ISBN: (纸本)9798400706684

In most modern networks, nodes have access to various modes of communication each with different characteristics. In this work we consider the Hybrid model of distributed computing, introduced recently by Augustine, Hinnenthal, Kuhn, Scheideler, and Schneider (SODA 2020), where nodes have access to two different communication modes: high-bandwidth local communication along the edges of the graph and low-bandwidth all-to-all communication, capturing the non-uniform nature of modern communication networks. It is noteworthy that the Hybrid model in its most general form covers most of the classical distributed models as marginal *** work in Hybrid has focused on showing existentially optimal algorithms, meaning there exists a pathological family of instances on which no algorithm can do better. This neglects the fact that such worst-case instances often do not appear or can be actively avoided in practice. In this work, we focus on the notion of universal optimality, first raised by Garay, Kutten, and Peleg (FOCS 1993). Roughly speaking, a universally optimal algorithm is one that, given any input graph, runs as fast as the best algorithm designed specifically for that *** show the first universally optimal algorithms in Hybrid, up to polylogarithmic factors. We present universally optimal solutions for fundamental tools that solve information dissemination problems, such as broadcasting and unicasting multiple messages in a Hybrid network. Furthermore, we demonstrate these tools for information dissemination can be used to obtain universally optimal solutions for various shortest paths problems in Hybrid. A major conceptual contribution of this work is the conception of a new graph parameter called neighborhood quality that captures the inherent complexity of many fundamental graph problems in the Hybrid model. We also develop new existentially optimal shortest paths algorithms in Hybrid, which are utilized as key subroutines in our universally optimal al

关键词： Overlay networks

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Brief Announcement: Optimally work-competitive scheduling for cooperative computing with merging groups

Brief Announcement: Optimally work-competitive scheduling fo...

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proceedings of the Twenty - First Annual acm symposium on principles of distributed computing PODC 2002

作者： Georgiou, Chryssis Russell, Alexander Shvartsman, Alex A. Department of Computer Science University of Connecticut 191 Auditorium Rd. Unit 3155 Storrs CT 06269 United States

The development of algorithms with guaranteed work efficiency for any pattern of fragmentations and merges of the underlying network is addressed. Current results are discussed for the abstract setting where asynchronous processors start performing tasks in isolation and where an adversary can force an arbitrary pattern of merges. Following a merge, processors are able to share their knowledge about the computational progress prior to the merge.

关键词： distributed computer systems

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What cannot be computed locally! 04

What cannot be computed locally!

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proceedings of the 23rd Annual acm symposium on principles of distributed computing

作者： Kuhn, Fabian Moscibroda, Thomas Wattenhofer, Roger Dept. of Computer Science ETH Zurich 8092 Zurich Switzerland

ISBN: (纸本)9781581138023

We give time lower bounds for the distributed approximation of minimum vertex cover (MVC) and related problems such as minimum dominating set (MDS). In k communication rounds, MVC and MDS can only be approximated by factors Ω(nc/k2,/k) and Ω(Δ1/k/k) for some constant c, where n and Δ denote the number of nodes and the largest degree in the graph. The number of rounds required in order to achieve a constant or even only a polylogarithmic approximation ratio is at least Ω(√log n/ log log n) and Ω(log Δ/ log log Δ). By a simple reduction, the latter lower bounds also hold for the construction of maximal matchings and maximal independent sets.

关键词： distributed computer systems

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Selfish caching in distributed systems: A game-theoretic analysis

Selfish caching in distributed systems: A game-theoretic ana...

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proceedings of the 23rd Annual acm symposium on principles of distributed computing

作者： Chun, Byung-Gon Barreno, Marco Chaudhuri, Kamalika Papadimitriou, Christos H. Wee, Hoeteck Kubiatowicz, John Computer Science Division University of California Berkeley

We analyze replication of resources by server nodes that act selfishly, using a game-theoretic approach. We refer to this as the selfish caching problem. In our model, nodes incur either cost for replicating resources or cost for access to a remote replica. We show the existence of pure strategy Nash equilibria and investigate the price of anarchy, which is the relative cost of the lack of coordination. The price of anarchy can be high due to undersupply problems, but with certain network topologies it has better bounds. With a payment scheme the game can always implement the social optimum in the best case by giving servers incentive to replicate.

关键词： distributed computer systems

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Conference Record of the Annual acm symposium on principles of Programming Languages

Conference Record of the Annual ACM Symposium on Principles ...

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43rd Annual acm SIGPLAN-SIGACT symposium on principles of Programming Languages, POPL 2016

ISBN: (纸本)9781450335492

The proceedings contain 61 papers. The topics discussed include: programming the world of uncertain things;type theory in type theory using quotient inductive types;system F-omega with equirecursive types for datatype-generic programming;a theory of effects and resources: adjunction models and polarized calculi;temporal verification of higher-order functional programs;scaling network verification using symmetry and surgery;model checking for symbolic-heap separation logic with inductive predicates;reducing crash recoverability to reachability;query-guided maximum satisfiability;string solving with word equations and transducers: towards a logic for analyzing mutation XSS;symbolic computation of differential equivalences;and unboundedness and downward closures of higher-order pushdown automata.

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System Optimizations for Enabling Training of Extreme Long Sequence Transformer Models 24

System Optimizations for Enabling Training of Extreme Long S...

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43rd acm SIGACT-SIGOPS symposium on principles of distributed computing, PODC 2024

作者： Jacobs, Sam Ade Tanaka, Masahiro Zhang, Chengming Zhang, Minjia Aminadabi, Reza Yazdani Song, Shuaiwen Leon Rajbhandari, Samyam He, Yuxiong Microsoft Inc Redmond United States

ISBN: (纸本)9798400706684

Computation in a typical Transformer-based large language model (LLM) can be characterized by batch size, hidden dimension, number of layers, and sequence length. Until now, system works for accelerating LLM training have focused on the first three dimensions: data parallelism for batch size, tensor parallelism for hidden size, and pipeline parallelism for model depth or layers. These widely studied forms of parallelism are not targeted or optimized for long sequence Transformer models. Given practical application needs for long sequence LLM, renewed attentions are being drawn to sequence parallelism. However, existing works in sequence parallelism are constrained by memory-communication inefficiency, limiting their scalability to long sequence large models. In this work, we introduce Ulysses, a novel, portable, and effective methodology for enabling highly efficient and scalable LLM training with extremely long sequence length. Ulysses at its core partitions input data along the sequence dimension and employs an efficient all-to-all collective communication for attention computation. Theoretical communication analysis shows that, whereas other methods incur communication overhead as sequence length increases, Ulysses maintains constant communication volume when sequence length and compute devices are increased proportionally. Furthermore, experimental evaluations show that Ulysses scales to more than 1 million context length and trains 2.5x faster with 4x longer sequence length than the existing method SOTA baseline. © 2024 Association for computing Machinery. All rights reserved.

关键词： AI/ML long context LLM HPC distributed training

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