检索结果-内蒙古大学图书馆

application-Guided Power-Efficient Fault Tolerance for H.264 Context Adaptive Variable Length Coding

IEEE TRANSACTIONS ON COMPUTERS 2017年第4期66卷 560-574页

作者： Shafique, Muhammad Rehman, Semeen Kriebel, Florian Khan, Muhammad Usman Karim Zatt, Bruno Subramaniyan, Arun Vizzotto, Bruno Boessio Henkel, Joerg Vienna Univ Technol Embedded Comp Syst Grp A-1040 Vienna Austria Tech Univ Dresden A-1040 Vienna Austria IBM Res D-71032 Boblingen Germany Univ Fed Pelotas BR-96010610 Pelotas Brazil Univ Michigan Ann Arbor MI 48109 USA Univ Pampa BR-96412420 Bage RS Brazil Karlsruhe Inst Technol D-76131 Karlsruhe Germany

This paper presents a fault-tolerance technique for H.264's Context-Adaptive Variable Length Coding (CAVLC) on unreliable computing hardware. The application-specific knowledge is leveraged at both algorithm and architecture levels to protect the CAVLC process (especially context adaptation and coding tables) in a reliable yet power-efficient manner. specifically, the statistical analysis of coding syntax and video content properties are exploited for: (1) selective redundancy of coefficient/header data of video bitstreams;(2) partitioning the coding tables into various sub-tables to reduce the power overhead of fault tolerance;and (3) run-time power management of memory parts storing the sub-tables and their parity computations. Experimental results demonstrate that leveraging application-specific knowledge reduces area and performance overhead by 2x compared to a double-parity table protection technique. For functional verification and area comparison, the complete H.264 CAVLC architecture is prototyped on a Xilinx Virtex-5 FPGA (though not limited to it).

关键词： application-specific optimization h.264 entropy coding video coding reliability fault tolerance

来源：评论

学校读者我要写书评

暂无评论

Hybrid Scratchpad Video Memory Architecture for Energy-Efficient Parallel HEVC

引用

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2019年第10期29卷 3046-3060页

作者： Sampaio, Felipe M. Zatt, Bruno Shafique, Muhammad Henkel, Jorg Bampi, Sergio Univ Fed Rio Grande do Sul Informat Inst PPGC BR-90650001 Porto Alegre RS Brazil Univ Fed Pelotas Ctr Technol Dev BR-96010610 Pelotas Brazil Vienna Univ Technol Inst Comp Engn A-1040 Vienna Austria Karlsruhe Inst Technol Chair Embedded Syst D-76131 Karlsruhe Germany

A hybrid scratchpad video memory (Hy-SVM) for energy-efficient tiles-parallelized high-efficiency video coding (HEVC) is presented here. The key ideas behind the Hy-SVM include: application-specific design and management;combined multiple levels of private and shared memories that jointly exploit intra-tile and inter-tiles data reuse;scratchpad memories (SPMs) as on-chip data storage;SRAM;and STT-RAM hybrid design. We propose a design methodology for the Hy-SVM that leverages application-specific properties to properly define the SPMs parameters. The inter-tiles data reuse potential of parallel HEVC is exploited by our run-time overlap prediction scheme, which identifies the redundant memory access behavior by analyzing monitored past frames encoding. Based on the predicted overlap characteristics, the Hy-SVM integrates memory access management units to control the access dynamics to the private/shared SPM levels. Furthermore, adaptive access management units (APMUs) can strongly reduce on-chip energy consumption due to the predicted overlap formation. The experimental results demonstrate the Hy-SVM overall energy savings of 11%-64% (4-tile) and 8%-46% (8-tile) when compared with related works. From the external memory perspective, the Hy-SVM can improve data reuse, resulting in 14%-59% of off-chip energy consumption (compared with no inter-tiles data reuse scenarios). In addition, our APMU contributes by reducing on-chip energy consumption of the Hy-SVM by 58%, on average. Thus, compared with related works, the Hy-SVM presents the lowest on-chip energy consumption. Moreover, the overhead of implementing our management units insignificantly affects the performance- and energy-efficiency of the Hy-SVM.

关键词： Video memory scratchpad HEVC application-specific optimization energy efficiency adaptivity

来源：评论

学校读者我要写书评

暂无评论

Quality-driven design for video applications

引用

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2002年第12期E85A卷 2568-2576页

作者： Cao, Y Yasuura, H Kyushu Univ Dept Comp Sci & Commun Engn Kasuga Fukuoka 8168580 Japan Kyushu Univ Grad Sch Informat Sci & Elect Engn Kasuga Fukuoka 8168580 Japan

This paper presents a novel system-level design methodology, called quality-driven design, by which application-specific optimization can be achieved;furthermore the entire functionality can be shared to maximize design reuse. As a case of study, this paper focuses on quality-driven design for video applications and introduces an output quality adaptive approach based on variable bitwidth optimization to explore a new design space. MPEG2 video is used as the driver application to illustrate the potential of the presented methodology. Experimental results show the effectiveness of the methodology.

关键词： quality-driven design variable analysis design reuse application-specific optimization

来源：评论

学校读者我要写书评

暂无评论

Evaluation of Dynamic Profiling Methodologies for optimization of Sensor Networks

引用

IEEE EMBEDDED SYSTEMS LETTERS 2010年第1期2卷 10-13页

作者： Shenoy, Ashish Hiner, Jeff Lysecky, Susan Lysecky, Roman Gordon-Ross, Ann Univ Arizona Dept Elect & Comp Engn Tucson AZ 85721 USA Univ Florida Dept Elect & Comp Engn Gainesville FL 32611 USA

To reduce the complexity associated with application-specific tuning of sensor-based systems, dynamic profiling enables an accurate view of the application behavior, such that the network can be reoptimized at runtime in response to changing application behavior or environmental conditions. However, dynamic profiling must be able to accurately capture application behavior without incurring significant runtime overheads. We present several profiling methods for dynamically monitoring sensor-based platforms and analyze the associated network traffic, energy, and code impacts.

关键词： application-specific optimization design automation dynamic profiling sensor networks

来源：评论

学校读者我要写书评

暂无评论

Content-Driven Memory Pressure Balancing and Video Memory Power Management for Parallel High Efficiency Video Coding 14

Content-Driven Memory Pressure Balancing and Video Memory Po...

引用

IEEE/ACM International Symposium on Low Power Electronics and Design (ISLPED)

作者： Sampaio, Felipe Shafique, Muhammad Zatt, Bruno Bampi, Sergio Henkel, Joerg Fed Univ Rio Grande Sul UFRGS PPGC Informat Inst Porto Alegre RS Brazil KIT CES Karlsruhe Germany Fed Univ Pelotas UFPel CDTec PPGC GACI Pelotas RS Brazil

ISBN: (纸本)9781450329750

We present a novel content-driven memory pressure balancing and video memory power management scheme for parallel High Efficiency Video Coding (HEVC). The key is to leverage the application-specific knowledge to balance the (instant) access pressure on Scratchpad-based Video Memories (SVMs) for parallelized video processing. Our scheme accurately predicts the memory requirements of each processing core based on monitored memory usage and leverages this knowledge to perform a categorization of different video regions. Afterwards, it employs an adaptive policy for memory pressure balancing by rescheduling encoding of different video blocks based on their categories. This balancing also facilitates our scheme to perform efficient power-gating of unused parts of SVMs. Experimental results show that our scheme reduces the variations in the memory pressure by 37%-83% when compared to the traditional raster scan processing for 4- and 16-core parallelized HEVC encoder. Our content-driven power management saves 56% (on average) of SVM leakage energy.

关键词： On-chip memory memory pressure reduction application-specific optimization HEVC adaptivity power management low-power

来源：评论

学校读者我要写书评

暂无评论

GPU-Based Static Data-Flow Analysis for Fast and Scalable Android App Vetting 34

GPU-Based Static Data-Flow Analysis for Fast and Scalable An...

引用

34th IEEE International Parallel and Distributed Processing Symposium (IPDPS)

作者： Yu, Xiaodong Wei, Fengguo Ou, Xinming Becchi, Michela Bicer, Tekin Yao, Danfeng (Daphne) Virginia Tech Dept Comp Sci Blacksburg VA 24061 USA Univ S Florida Dept Comp Sci & Engn Tampa FL 33620 USA North Carolina State Univ Dept Elect & Comp Engn Raleigh NC USA Argonne Natl Lab Data Sci & Learning Div Lemont IL 60439 USA Virginia Tech Blacksburg VA USA Google Android Secur & Privacy Grp Menlo Pk CA USA

ISBN: (纸本)9781728168760

Many popular vetting tools for Android applications use static code analysis techniques. In particular, Interprocedural Data-Flow Graph (IDFG) construction is the computation at the core of Android static data-flow analysis and consumes most of the analysis time. Many analysis tools use a worklist algorithm, an iterative fixed-point approach, to construct the IDFG. In this paper, we observe that a straightforward GPU parallelization of the worklist algorithm leads to significant underutilization of the GPU resources. We identify four performance bottlenecks, namely, frequent dynamic memory allocations, high branch divergence, workload imbalance, and irregular memory access patterns. Accordingly, we propose GDroid, a GPU-based worklist algorithm implementation with multiple fine-grained optimizations tailored to common characteristics of Android applications. The optimizations considered are: matrix-based data structure, memory access-based node grouping, and worklist merging. Our experimental evaluation, performed on 1000 Android applications, shows that the proposed optimizations are beneficial to performance, and GDroid can achieve up to 128X speedups against a plain GPU implementation.

关键词： GPU static program analysis data-flow analysis Android security mobile application vetting worklist algorithm application-specific optimization

来源：评论

学校读者我要写书评

暂无评论

hevcDTM: application-Driven Dynamic Thermal Management for High Efficiency Video Coding

hevcDTM: Application-Driven Dynamic Thermal Management for H...

引用

Design, Automation and Test in Europe Conference and Exhibition (DATE)

作者： Palomino, Daniel Shafique, Muhammad Amrouch, Hussam Susin, Altamiro Henkel, Joerg Karlsruhe Inst Technol CES D-76021 Karlsruhe Germany Univ Fed Rio Grande do Sul PPGC Informat Inst BR-90046900 Porto Alegre RS Brazil

ISBN: (纸本)9783981537024

This paper presents an application-driven algorithm for Dynamic Thermal Management (DTM) for the High Efficiency Video Coding (HEVC). For efficient design of such a DTM policy, we perform an offline thermal analysis of an HEVC encoder and demonstrate the impact of different video sequences and different coding configurations on the processor temperature. Our thermal analysis is leveraged to develop an efficient application-driven DTM policy that performs temperature-aware coding along with an application-driven control of DTM knobs (e.g., frequency scaling) in order to meet the temperature constraints while still providing high video quality (i.e. PSNR loss < 0.01dB). For accurate thermal analysis and evaluation, we deploy an infrared camera-based thermal measurement setup that, on the contrary to state-of-the-art setups, does not require adding any extra layer on top of the measured chip, thus allowing the camera to accurately capture the infrared emissions from the die.

关键词： Dynamic Thermal Management DTM HEVC application-specific optimization Thermal Analysis IR Camera

来源：评论

学校读者我要写书评

暂无评论

Boosting Efficiency of Fault Detection and Recovery through application-specific Comparison and Checkpointing

Boosting Efficiency of Fault Detection and Recovery through ...

引用

14th ACM SIGPLAN/SIGBED Conference on Languages, Compilers and Tools for Embedded Systems

作者： Chen, Hao Yang, Chengmo Univ Delaware Dept Elect & Comp Engn Newark DE 19716 USA

ISBN: (纸本)9781450320856

While the unending technology scaling has brought reliability to the forefront of concerns of semiconductor industry, fault tolerance techniques are still rarely incorporated into existing designs due to their high overhead. One fault tolerance scheme that receives a lot of research attention is duplication and checkpointing. However, most of the techniques in the category employ a blind strategy to compare instruction results, therefore not only generating large overhead in buffering and verifying these values, but also inducing unnecessary rollbacks to recover faults that will never influence subsequent execution. To tackle these issues, we introduce in this paper an approach that identifies the minimum set of instruction results for fault detection and checkpointing. For a given application, the proposed technique first identifies the control and data flow information of each execution hotspot, and then selects only the instruction results that either influence the final program results or are needed during re-execution as the comparison set. Our experimental studies demonstrate that the proposed hotspot-targeting technique is able to reduce nearly 88% of the comparison overhead and mask over 38% of the total injected faults of all the injected faults while at the same time delivering full fault coverage.

关键词： Performance Reliability Reliability Fault detection & recovery Checkpointing application-specific optimization

来源：评论

学校读者我要写书评

暂无评论

hevcDTM: application-Driven Dynamic Thermal Management for High Efficiency Video Coding 14

hevcDTM: Application-Driven Dynamic Thermal Management for H...

引用

Design, Automation and Test in Europe Conference and Exhibition

作者： Daniel Palomino Muhammad Shafique Hussam Amrouch Altamiro Susin Jorg Henkel Karlsruhe Institute of Technology (KIT) Germany Federal University of Rio Grande do Sul (UFRGS) Brazil

ISBN: (纸本)9783981537024

关键词： Dynamic Thermal Management DTM HEVC application-specific optimization Thermal Analysis IR Camera

来源：评论

学校读者我要写书评

暂无评论

Boosting efficiency of fault detection and recovery throughapplication-specific comparison and checkpointing 13

Boosting efficiency of fault detection and recovery througha...

引用

Proceedings of the 14th ACM SIGPLAN/SIGBED conference on Languages, compilers and tools for embedded systems

作者： Hao Chen Chengmo Yang University of Delaware Newark DE USA

ISBN: (纸本)9781450320856

关键词： checkpointing application-specific optimization reliability fault detection & recovery

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：