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PG-YOLO: A Lightweight Vehicle Detection Method for Drones 22

PG-YOLO: A Lightweight Vehicle Detection Method for Drones

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22nd IEEE international symposium on parallel and distributed processing with applications, ISPA 2024

作者： Liu, Yang Fan, Tengyu Mei, Kun Zhou, Liming Henan University Henan Key Laboratory of Big Data Analysis and Processing Henan Kaifeng475004 China Henan University School of Computer and Information Engineering Henan Kaifeng475004 China Huaihe Hospital of Henan University Department of Clinical Laboratory Henan Kaifeng475004 China

ISBN: (纸本)9798331509712

With the rapid development of drone technology, object detection technology is widely applied in the field of drone intelligent transportation. In response to the problems of low accuracy and high computational complexity in vehicle detection tasks on resource limited drones, this paper proposes a lightweight and efficient improved model PG-YOLO for drone vehicle detection based on the YOLOv7-tiny model. Firstly, replace the LeakyReLU activation function with the SiLU activation function to compensate for the lack of nonlinear expression in the LeakyReLU activation function, and improve the convergence speed and generalization of the model during training;Secondly, the feature extraction and fusion modules were optimized to enhance the network's perception and capture capabilities of the target, improve detection accuracy, and reduce the number of parameters;Then, lightweight convolution PConv and GSConv are introduced, and a lightweight module PPC based on PConv is proposed to improve the network's Neck layer, reducing the number of parameters and computation while maintain detection performance;Finally, the CBAM attention mechanism is introduced to improve the detection performance for the problem of dense vehicle targets. The improved network achieved an average detection accuracy of 60.1%, an increase of 12.1 percentage points compared to the original network, a reduction of 73.6% in parameter count, a reduction of 15.9% in computational complexity, and a detection speed of 154 FPS. Compared to the original network, the network is more lightweight and achieves higher detection accuracy, which can more effectively perform unmanned aerial vehicle detection tasks. © 2024 IEEE.

关键词： Drones

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Multimodal Interaction Fusion Network for Cloth-Changing Person Re-Identification 22

Multimodal Interaction Fusion Network for Cloth-Changing Per...

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22nd IEEE international symposium on parallel and distributed processing with applications, ISPA 2024

作者： Yuan, Caihong Xu, Yuanchen Guan, Zhijie Chen, Xiaopan Zhu, Xiaoke Liang, Wenjuan Henan University School of Computer and Information Engineering Kaifeng China Henan Engineering Research Center of Intelligent Technology and Application Henan Province Spatial Information Processing Engineering Technology Research Center Kaifeng China

ISBN: (纸本)9798331509712

Cloth-Changing Person Re-Identification (CC-ReID) refers to the technology that can identify the same individual in surveillance scenarios, even after changing their clothes. The core of CC-ReID is to exact cloth-irrelevant identity features. Existing methods usually extract them from body contours, skeletons, human faces, etc. However, information extracted from a single modality is often insufficient. Therefore, we propose a novel Multimodal Interaction Fusion (MIF) framework that could facilitate the deep integration of multimodal information, thereby enhancing the generalization ability of CC-ReID. Specifically, we design a triple-interaction collaborative module that strategically integrates features captured from body posture, original RGB images, and clothes-erased images, maximizing the advantages of each modality and overcoming their limitations. Additionally, we develop an Adapt-Blend Pool (ABP) module that effectively improves pooling methods to enhance the model's ability to process images with complex backgrounds and varied features. Following training, our framework effectively harnesses a variety of modal inputs to capture identity representations independent of clothing accurately. Extensive experimental results on PRCC, LTCC, and VC-Clothes datasets demonstrate the effectiveness of the proposed method. © 2024 IEEE.

关键词： Image enhancement

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Fast distributed Polynomial Multiplication Algorithm for Lattice-based Cryptographic Decryption In Blockchain Systems 22

Fast Distributed Polynomial Multiplication Algorithm for Lat...

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22nd IEEE international symposium on parallel and distributed processing with applications, ISPA 2024

作者： Zhao, Hongjian Tao, Yunting Kong, Fanyu Zhang, Guoyan Zhang, Hanlin Yu, Jia Shandong University School of Software Jinan China Binzhou Polytechnic College of Information Engineering Binzhou China Shandong University Shandong Sansec Information Technology Co. Ltd School of Software Jinan China Shandong University School of Cyber Science and Technology Qingdao China Qingdao University College of Computer Science and Technology Qingdao China

ISBN: (纸本)9798331509712

Lattice-based Post-Quantum Cryptography (PQC) can effectively resist the quantum threat to blockchain's underlying cryptographic algorithms. Blockchain node decryption is one of the most commonly used cryptographic computations in blockchain systems, and polynomial multiplication, a time-consuming operation for decryption, is one of the factors limiting blockchain efficiency. This paper proposes a novel distributed computing algorithm for polynomial multiplication, applicable in blockchain decryption. By splitting polynomials into lower-degree terms and delegating tasks to distributed nodes, our approach reduces computation time. A novel verification strategy based on the Karatsuba algorithm ensures result accuracy. The experimental results demonstrate that our proposed scheme improves the execution efficiency of NTT and INTT operations by approximately 47.8% and 52.4%, and reduces Kyber decryption time by up to 23.5%. © 2024 IEEE.

关键词： Encryption algorithms

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The GraphBLAS 3.0 Project

The GraphBLAS 3.0 Project

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1st international Conference on Smart Energy Systems and Artificial Intelligence (SESAI)

作者： Kimmerer, Raye Mattson, Timothy G. McMillan, Scott Brock, Benjamin Welch, Erik Pelletier, Michel Moreira, Jose E. MIT JuliaLab 77 Massachusetts Ave Cambridge MA 02139 USA Human Learning Grp Ocean Park WA USA Carnegie Mellon Univ Software Engn Inst Pittsburgh PA 15213 USA Intel Parallel Comp Lab Santa Clara CA USA NVIDIA Corp Austin TX USA Graphegon Portland OR USA IBM Thomas J Watson Res Ctr Yorktown Hts NY USA

ISBN: (纸本)9798350364613;9798350364606

The GraphBLAS C API is mature with an updated specification (version 2.1) and a compliant implementation (SuiteSparse GraphBLAS). We are now focused on GraphBLAS 3.0;the next major GraphBLAS revision. Potential changes include: (1) a separate math spec to make new language bindings easier to write, (2) better support for user-defined types, rank promotion, and enhanced non-blocking execution, (3) expanded scope of GraphBLAS to address a wider range of applications, and (4) support for complex heterogeneous and distributed systems.

关键词： Graph Algorithms GraphBLAS Sparse Linear Algebra

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Funnel: An Efficient Sparse Attention Accelerator with Multi-Dataflow Fusion 22

Funnel: An Efficient Sparse Attention Accelerator with Multi...

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22nd IEEE international symposium on parallel and distributed processing with applications, ISPA 2024

作者： Ma, Shenghong Xu, Jinwei Jiang, Jingfei Wang, Yaohua Li, Dongsheng National University of Defense Technology National Key Laboratory of Parallel and Distributed Computing College of Computer Changsha China

ISBN: (纸本)9798331509712

The self-attention mechanism is the core component of Transformer, which provides a powerful ability to understand the sequence context. However, the self-attention mechanism also suffers from a large amount of redundant computation. Model sparsification can effectively reduce computational load, but the irregularity of non-zeros introduced by sparsification significantly decreases hardware efficiency. This paper proposes Funnel, an accelerator that dynamically predicts sparse attention patterns and efficiently processes unstructured sparse data. Firstly, we adopt a fast quantization method based on lookup table to minimize the cost of sparse patterns prediction. Secondly, we propose Funnel Computing Unit (FCU), a hardware architecture that efficiently handles sparse attention through multi-dataflow fusion. Sampled Dense-Dense Matrix Multiplication (SDDMM) and Sparse-Dense Matrix Multiplication (SpMM) are core components of sparse attention mechanism. FCU unifies the computation ways of matrix inner product and row-wise product to support SDDMM and SpMM at the same time, which greatly reduces the storage and movement overhead of intermediate results. Lastly, we devise a lightweight buffer and data tiling strategy tailored to the proposed accelerator, aimed at enhancing data reuse. Experiments demonstrate that our accelerator achieves 0.10-0.25 sparsity with small accuracy loss. When computing the self-attention layer, it attains hardware efficiency ranging from 60% to 85%. Compared to CPU and GPU, it achieves 5.60x and 8.20x speedup. Compared to the state-of-the-art attention accelerators A3, SpAtten, FTRANS, and Sanger, it achieves 7.37x, 4.52x, 9.58x, and 3.08x speedup. © 2024 IEEE.

关键词： FPGA Funnel computing unit Sparse attention Transformer

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Optimizing Batched Small Matrix Multiplication on Multi-core DSP Architecture 22

Optimizing Batched Small Matrix Multiplication on Multi-core...

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22nd IEEE international symposium on parallel and distributed processing with applications, ISPA 2024

作者： Zuo, Xiaohan Xiao, Chunhua Wang, Qinglin Shi, Chen Chongqing University College of Computer Science Chongqing China Ministry of Education Key Laboratory of Dependable Service Computing in Cyber Physical Society China National University of Defense Technology National Key Laboratory of Parallel and Distributed Computing Changsha410073 China National University of Defense Technology Laboratory of Digitizing Software for Frontier Equipment Changsha410073 China

ISBN: (纸本)9798331509712

General Matrix Multiplication (GEMM) is a critical computational operation in scientific computing and machine learning domains. While traditional GEMM performs well on large matrices, it is inefficient in terms of data transfer and computation for small matrices. Many High-Performance Computing (HPC) tasks can be decomposed into large batches of small matrix multiplication operations. Multi-core Digital Signal Processors (DSPs) are commonly used to accelerate high-performance computing. We present a design for batched fusion small matrix multiplication (BFMM) tailored for multi-core DSP architecture. To address the inefficiencies and redundancy in storage and computational operations associated with batch small matrix multiplications, we designed several strategies. We design a matrix fusion concatenation strategy, an access coordination mechanism, and a mechanism for fragment aggregation. BFMM supports an efficient K-dimension multi-core parallelization strategy. The parameter constraint model makes BFMM highly portable. BFMM also includes a performance evaluation model that facilitates assessment and verification. Experimental results demonstrate that, compared to traditional GEMM (TGEMM) on multi-core DSP and traditional GEMM with concatenated data access (TGEMM Op), BFMM exhibits superior performance. For large batches of small matrices, our design achieves 1.21x to 18x higher performance than TGEMM Op on single-core DSP, while on multi-core DSP, it outperforms TGEMM Op by 1.14x to 18.1x. © 2024 IEEE.

关键词： Network security

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Accelerating MPI Collectives with Process-in-Process-based Multi-object Techniques 23

Accelerating MPI Collectives with Process-in-Process-based M...

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32nd international symposium on High-Performance parallel and distributed Computing (HPDC) part of the ACM Federated Computing Research Conference (FCRC)

作者： Huang, Jiajun Ouyang, Kaiming Zhai, Yujia Liu, Jinyang Si, Min Raffenetti, Ken Zhou, Hui Hori, Atsushi Chen, Zizhong Guo, Yanfei Thakur, Rajeev Univ Calif Riverside Riverside CA 92521 USA NVIDIA Corp Santa Clara CA USA Meta Platforms Inc Menlo Pk CA USA Argonne Natl Lab Argonne IL USA Natl Inst Informat Tokyo Japan

ISBN: (纸本)9798400701559

In the exascale computing era, optimizing MPI collective performance in high-performance computing (HPC) applications is critical. Current algorithms face performance degradation due to system call overhead, page faults, or data-copy latency, affecting HPC applications' efficiency and scalability. To address these issues, we propose PiP-MColl, a Process-in-Process-based Multi-object Interprocess MPI Collective design that maximizes small message MPI collective performance at scale. PiP-MColl features efficient multiple sender and receiver collective algorithms and leverages Process-in-Process shared memory techniques to eliminate unnecessary system call, page fault overhead, and extra data copy, improving intra- and inter-node message rate and throughput. Our design also boosts performance for larger messages, resulting in comprehensive improvement for various message sizes. Experimental results show that PiP-MColl outperforms popular MPI libraries, including OpenMPI, MVAPICH2, and Intel MPI, by up to 4.6X for MPI collectives like MPI_Scatter and MPI_Allgather.

关键词： mpi collective process-in-process distributed systems message passing interface parallel algorithms

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FLEXLOG: A Shared Log for Stateful Serverless Computing 23

FLEXLOG: A Shared Log for Stateful Serverless Computing

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32nd international symposium on High-Performance parallel and distributed Computing (HPDC) part of the ACM Federated Computing Research Conference (FCRC)

作者： Giantsidi, Dimitra Giortamis, Emmanouil Tornow, Nathaniel Dinu, Florin Bhatotia, Pramod Univ Edinburgh Edinburgh Midlothian Scotland Tech Univ Munich Munich Germany Huawei Munich Res Ctr Munich Germany

ISBN: (纸本)9798400701559

Stateful serverless applications need to persist their state and data. The existing approach is to store the data in general purpose storage systems. However, these approaches are not designed to meet the demands of serverless applications in terms of consistency, fault tolerance and performance. We present FlexLog, a storage system, specifically a distributed sharedlog, distinctively designedtomeet the requirements of stateful serverless computing while mitigating the relevant system bottlenecks. FlexLog's data layer leverages the state-of-the-art persistent memory (PM) to offer low latency I/O and improve performance. To match the performance, FlexLog's ordering layer employs a scalable design, namely a tree-structure set of sequencer nodes. Importantly, this design provides serverless applications with the flexibility to implement different consistency guarantees and to seamlessly support multi-tenancy configurations. We implement FlexLog from the ground up on a real hardware testbed and we also prove the correctness of our protocols. In particular, we evaluate FlexLog on a cluster of 6 machines with 800 GB Intel Optane DC PM over a 10 Gbps interconnect. Our evaluation shows that FlexLog scales to millions of operations per second while maintaining minimal latency. Our comparison with the state-of-the-art shared log for serverless, Boki, shows that we achieve 10x better throughput in the storage layer and 2x-4x lower latency in the ordering layer, while also providing flexibility to support different consistency properties and multi-tenancy.

关键词： Serverless Computing Shared distributed Log Persistent Memory

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Communication-efficient Massively distributed Connected Components 36

Communication-efficient Massively Distributed Connected Comp...

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36th IEEE international parallel and distributed processing symposium (IEEE IPDPS)

作者： Lamm, Sebastian Sanders, Peter Karlsruhe Inst Technol Inst Theoret Informat Karlsruhe Germany

ISBN: (纸本)9781665481069

Finding the connected components of an undirected graph is one of the most fundamental graph problems. Connected components are used in a wide spectrum of applications including VLSI design, machine learning and image analysis. Sequentially, one can easily find all connected components in linear time using breadth-first traversal. However, in a massively distributed setting, finding connected components in a scalable way becomes much harder due to data irregularities and the overhead associated with the increased need for communication. In this work, we present a communication-efficient distributed graph algorithm for finding connected components that scales to massively parallel machines. Our algorithm is based on a recent linear-work shared-memory parallel algorithm by Blelloch et al. [1] and refines it for a distributed memory setting. This includes a communication-efficient graph contraction procedure, as well as a distributed variant of the low diameter decomposition by Miller et al. [2]. We tackle the data irregularities introduced by high degree vertices by using an efficient procedure for distributing their incident edges. Our experimental evaluation on up to 16 384 cores indicates a good weak scaling behavior that outperforms current state-of-the-art algorithms.

关键词： graph algorithms distributed algorithms communication efficiency graph connectivity

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DArray: A High Performance RDMA-Based distributed Array 23

DArray: A High Performance RDMA-Based Distributed Array

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52nd international Conference on parallel processing (ICPP)

作者： Ding, Baorong Han, Mingcong Chen, Rong Shanghai Jiao Tong Univ Shanghai Peoples R China Shanghai Jiao Tong Univ Shanghai AI Lab Shanghai Peoples R China

ISBN: (纸本)9798400708435

This paper presents DArray, a high performance RDMA-based distributed memory system. DArray achieves high performance through three key designs. First, DArray is designed with an object array abstraction, which captures the high-level application semantics and provides a rich set of optimized interfaces with object granularity. Second, DArray adopts distributed cache to absorb remote data accesses. In order to reduce the performance overhead incurred by the cache layer and increase the parallelism, DArray devises a lock-free data access path to the local cache which utilizes reference counters to prevent data races. Finally, based on the observation that most data update operators are associative and commutative, DArray proposes a new "Operate" interface, which enables concurrent data operations on multiple nodes, and extends existing distributed cache coherence protocol to support the new "Operate" semantics. A graph analytics engine and a distributed key-value store (KVS) are built on top of DArray to demonstrate its versatility. The experiment results on graph applications show that DArray achieves two to three orders of magnitude better performance than GAM (a state-of-the-art distributed memory), also with a maximum speedup of 2.1x compared to Gemini (a state-of-the-art distributed graph engine). Furthermore, the DArray-based KVS outperforms the GAM-based KVS by up to 41x (from 2x).

关键词： RDMA distributed Shared Memory distributed Data Structure distributed System

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