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检索条件"任意字段=6th ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming"

共 379 条记录，以下是101-110 订阅

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Proceedings of the acm sigplan symposium on principles and practice of parallel programming, PPOPP

Proceedings of the ACM SIGPLAN Symposium on Principles and P...

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24th acm sigplan symposium on principles and practice of parallel programming, PPoPP 2019

ISBN: (纸本)9781450362252

the proceedings contain 58 papers. the topics discussed include: beyond human-level accuracy: computational challenges in deep learning;throughput-oriented GPU memory allocation;SEP-graph: finding shortest execution paths for graph processing under a hybrid framework on GPU;incremental flattening for nested data parallelism;modular transactions: bounding mixed races in space and time;processing transactions in a predefined order;data-flow/dependence profiling for structured transformations;lightweight hardware transactional memory profiling;provably and practically efficient granularity control;semantics-aware scheduling policies for synchronization determinism;and a round-efficient distributed betweenness centrality algorithm.

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PPoPP 2014 - Proceedings of the 2014 acm sigplan symposium on principles and practice of parallel programming

PPoPP 2014 - Proceedings of the 2014 ACM SIGPLAN Symposium o...

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2014 19th acm sigplan symposium on principles and practice of parallel programming, PPoPP 2014

ISBN: (纸本)9781450326568

the proceedings contain 43 papers. the topics discussed include: predator: predictive false sharing detection;concurrency testing using schedule bounding: an empirical study;trace driven dynamic deadlock detection and reproduction;efficient search for inputs causing high floating-point errors;portable, MPI-interoperable coarray Fortran;eliminating global interpreter locks in ruby through hardware transactional memory;leveraging hardware message passing for efficient thread synchronization;well-structured futures and cache locality;time-warp: lightweight abort minimization in transactional memory;beyond parallel programming with domain specific languages;a decomposition for in-place matrix transposition;in-place transposition of rectangular matrices on accelerators;and parallelizing dynamic programming through rank convergence.

关键词： FORTRAN (programming language)

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Is Transactional programming Actually Easier?

Is Transactional Programming Actually Easier?

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15th acm sigplan symposium on principles and practice of parallel programming

作者： Rossbach, Christopher J. Hofmann, Owen S. Witchel, Emmett Univ Texas Austin Austin TX 78712 USA

ISBN: (纸本)9781605587080

Chip multi-processors (CMPs) have become ubiquitous, while tools that ease concurrent programming have not. the promise of increased performance for all applications through ever more parallel hardware requires good tools for concurrent programming, especially for average programmers. Transactional memory (TM) has enjoyed recent interest as a tool that can help programmers program concurrently. the transactional memory (TM) research community is heavily invested in the claim that programming with transactional memory is easier than alternatives (like locks), but evidence for or against the veracity of this claim is scant. In this paper, we describe a user-study in which 237 undergraduate students in an operating systems course implement the same programs using coarse and fine-grain locks, monitors, and transactions. We surveyed the students after the assignment, and examined their code to determine the types and frequency of programming errors for each synchronization technique. Inexperienced programmers found baroque syntax a barrier to entry for transactional programming. On average, subjective evaluation showed that students found transactions harder to use than coarse-grain locks, but slightly easier to use than fine-grained locks. Detailed examination of synchronization errors in the students' code tells a rather different story. Overwhelmingly, the number and types of programming errors the students made was much lower for transactions than for locks. On a similar programming problem, over 70% of students made errors with fine-grained locking, while less than 10% made errors with transactions.

关键词： Design Performance Transactional Memory Optimistic Concurrency Synchronization

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Simplifying low-level GPU programming with GAS 21

Simplifying low-level GPU programming with GAS

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26th acm sigplan symposium on principles and practice of parallel programming, PPoPP 2021

作者： Yan, Da Wang, Wei Chu, Xiaowen Hkust Hong Kong Hong Kong Baptist University Hong Kong

ISBN: (纸本)9781450382946

Many low-level optimizations for NVIDIA GPU can only be implemented in native hardware assembly (SASS). However, programming in SASS is unproductive and not portable. To simplify low-level GPU programming, we present GAS (Gpu ASsembly), a PTX-like language that provides a stable instruction set across hardware architectures while giving programmers a low-level control of code execution. We demonstrate that GAS can be used with ease for low-level benchmarking and performance tuning in the context of Tensor Core HGEMM. © 2021 Owner/Author.

关键词： Graphics processing unit

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Petascale Computing with Accelerators

Petascale Computing with Accelerators

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14th acm sigplan symposium on principles and practice of parallel programming

作者： Kistler, Michael Gunnels, John Brokenshire, Daniel Benton, Brad IBM Corp Austin TX 78758 USA IBM Corp Yorktown Hts NY 10598 USA

ISBN: (纸本)9781605583976

A trend is developing in high performance computing in which commodity processors are coupled to various types of computational accelerators. Such systems are commonly called hybrid systems. In this paper, we describe our experience developing an implementation of the Linpack benchmark for a petascale hybrid system, the LANL Roadrunner cluster built by IBM for Los Alamos National Laboratory. this system combines traditional x86-64 host processors with IBM PowerXCell (TM) 8i accelerator processors. the implementation of Linpack we developed was the first to achieve a performance result in excess of 1.0 PFLOPS, and made Roadrunner the #1 system on the Top500 list in June 2008. We describe the design and implementation of hybrid Linpack, including the special optimizations we developed for this hybrid architecture. We then present actual results for single node and multi-node executions. From this work, we conclude that it is possible to achieve high performance for certain applications on hybrid architectures when careful attention is given to efficient use of memory bandwidth, scheduling of data movement between the host and accelerator memories, and proper distribution of work between the host and accelerator processors.

关键词： Algorithms Performance Design Accelerators hybrid programming models

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Implementing parallel and Concurrent Tree Structures 19

Implementing Parallel and Concurrent Tree Structures

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24th acm sigplan symposium on principles and practice of parallel programming (PPoPP)

作者： Sun, Yihan Blelloch, Guy Carnegie Mellon Univ Pittsburgh PA 15213 USA

ISBN: (纸本)9781450362252

As one of the most important data structures used in algorithm design and programming, balanced search trees are widely used in real-world applications for organizing data. Answering the challenges thrown up by modern largevolume and ever-changing data, it is important to consider parallelism, concurrency, and persistence. this tutorial will introduce techniques for supporting functionalities on trees, including various parallel algorithms, concurrency, multiversioning, etc. In particular, this tutorial will focus on an algorithmic framework for parallel balanced binary trees, which works for multiple balancing schemes, including AVL trees, red-black trees, weight-based trees, and treaps. this framework allows for theoretically-efficient algorithms. the corresponding implementation is available as a library, which demonstrates good performance both sequentially and in parallel in various use scenarios. this tutorial will focus on the following topics: 1) the algorithms and techniques used in the PAM library;2) the interface of the library and a hands-on introduction to the download/installation of the library;3) examples of applying the library to various applications and 4) introduction about other useful techniques for parallel tree structures and performance comparisons with PAM.

关键词： balanced tree augmented map parallel concurrent library PAM ordered set ordered map

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Evaluating Graph Coloring on GPUs 11

Evaluating Graph Coloring on GPUs

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16th acm symposium on principles and practice of parallel programming

作者： Grosset, A. V. Pascal Zhu, Peihong Liu, Shusen Venkatasubramanian, Suresh Hall, Mary Univ Utah Sch Comp Salt Lake City UT 84112 USA

ISBN: (纸本)9781450301190

this paper evaluates features of graph coloring algorithms implemented on graphics processing units (GPUs), comparing coloring heuristics and thread decompositions. As compared to prior work on graph coloring for other parallel architectures, we find that the large number of cores and relatively high global memory bandwidth of a GPU lead to different strategies for the parallel implementation. Specifically, we find that a simple uniform block partitioning is very effective on GPUs and our parallel coloring heuristics lead to the same or fewer colors than prior approaches for distributed-memory cluster architecture. Our algorithm resolves many coloring conflicts across partitioned blocks on the GPU by iterating through the coloring process, before returning to the CPU to resolve remaining conflicts. With this approach we get as few color (if not fewer) than the best sequential graph coloring algorithm and performance is close to the fastest sequential graph coloring algorithms which have poor color quality.

关键词： Algorithms Performance Graph coloring parallel algorithm GPU CUDA

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GENERATING parallel CODE FROM OBJECT-ORIENTED MAthEMATICAL-MODELS

GENERATING PARALLEL CODE FROM OBJECT-ORIENTED MATHEMATICAL-M...

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5th acm sigplan symposium on principles and practice of parallel programming

作者： ANDERSSON, N FRITZSON, P Linkoping Univ Linkoping Sweden

For a long time efficient use of parallel computers has been hindered by dependencies introduced in software through low-level implementation practice. In this paper we present a programming environment and language called Object-Math (Object oriented Mathematical language for scientific computing), which aims at eliminating this problem by allowing the user to represent mathematical equation-based models directly in the system. the system performs analysis of mathematical models to extract parallelism and automatically generates parallel code for numerical solution. In the context of industrial applications in mechanical analysis, we have so far primarily explored generation of parallel code for solving systems of ordinary differential equations (ODEs), in addition to preliminary work on generating code for solving partial differential equations. Two approaches to extracting parallelism have been implemented and evaluated: extracting parallelism at the equation system level and at the single equation level, respectively. We found that for several applications the corresponding systems of equations do not partition well into subsystems. this means that the equation system level approach is of restricted general applicability. thus, we focused on the equation-level approach which yielded significant parallelism for ODE systems solution. For the bearing simulation applications we present here, the achieved speedup is however critically dependent on low communication latency of the parallel computer.

关键词： parallel processing systems

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Extracting logical structure and identifying stragglers in parallel execution traces 14

Extracting logical structure and identifying stragglers in p...

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2014 19th acm sigplan symposium on principles and practice of parallel programming, PPoPP 2014

作者： Isaacs, Katherine E. Gamblin, Todd Bhatele, Abhinav Bremer, Peer-Timo Schulz, Martin Hamann, Bernd Department of Computer Science University of California Davis United States Center for Applied Scientific Computing Lawrence Livermore National Laboratory United States

ISBN: (纸本)9781450326568

We introduce a new approach to automatically extract an idealized logical structure from a parallel execution trace. We use this structure to define intuitive metrics such as the lateness of a process involved in a parallel execution. By analyzing and illustrating traces in terms of logical steps, we leverage a developer's understanding of the happened-before relations in a parallel program. this technique can uncover dependency chains, elucidate communication patterns, and highlight sources and propagation of delays, all of which may be obscured in a traditional trace visualization.

关键词： Visualization

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Proceedings of the acm sigplan symposium on principles and practice of parallel programming, PPOPP

Proceedings of the ACM SIGPLAN Symposium on Principles and P...

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20th acm sigplan symposium on principles and practice of parallel programming, PPoPP 2015

ISBN: (纸本)9781450332057

the proceedings contain 44 papers. the topics discussed include: predicate RCU: an RCU for scalable concurrent updates;automatic scalable atomicity via semantic locking;a framework for practical parallel fast matrix multiplication;PLUTO+: near-complete modeling of affine transformations for parallelism and locality;distributed memory code generation for mixed irregular/regular computations;performance implications of dynamic memory allocators on transactional memory systems;low-overhead software transactional memory with progress guarantees and strong semantics∗;barrier elision for production parallel programs;scalable and efficient implementation of 3D unstructured meshes computation: a case study on matrix assembly;and diagnosing the causes and severity of one-sided message contention.

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