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University of Virginia
(139 results)-
White Papers
Accelerating Enterprise Solid-State Disks With Non-Volatile Merge Caching
June 11, 2010, 12:00am PDT
Flash memory is now widely used in the design of Solid-State Disks (SSDs) as they are able to sustain significantly higher I/O rates than even high-performance hard disks, while using...
Provided by University of Virginia
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White Papers
Balancing Soft Error Coverage With Lifetime Reliability in Redundantly Multithreaded Processors
June 12, 2009, 12:00am PDT
Silicon reliability is a key challenge facing the micro-processor industry. Processors need to be designed such that they are resilient against both soft errors and lifetime reliability phenomena....
Provided by University of Virginia
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White Papers
Autonomous Defenses for Security Attacks in Pervasive CPS Infrastructure
July 13, 2009, 12:00am PDT
Cyber-Physical Systems (CPS) integrate computation with sensing, control, and physical systems and will enable development of next-generation services and smart infrastructure across many...
Provided by University of Virginia
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White Papers
Programming With Relaxed Streams
April 29, 2008, 12:00am PDT
Diminishing returns in single thread performance have forced a reevaluation of priorities in microprocessor design. Recent architectures have foregone deeper pipelining in favor of multiple cores...
Provided by University of Virginia
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White Papers
A Performance Study of General Purpose Applications on Graphics Processors
January 1, 2011, 12:00am PST
Graphic Processors Unit (GPUs), with many light-weight data-parallel cores, can provide substantial parallel computational power to accelerate general purpose applications. To best utilize the...
Provided by University of Virginia
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White Papers
Accelerating Leukocyte Tracking Using CUDA: A Case Study in Leveraging Manycore Coprocessors
May 1, 2009, 12:00am PDT
The availability of easily programmable manycore CPUs and GPUs has motivated investigations into how to best exploit their tremendous computational power for scientific computing. Here the authors...
Provided by University of Virginia
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White Papers
Accelerating Compute-Intensive Applications With GPUs and FPGAs
January 1, 2011, 12:00am PST
Accelerators are special purpose processors designed to speed up compute-intensive sections of applications. Two extreme endpoints in the spectrum of possible accelerators are FPGAs and GPUs,...
Provided by University of Virginia
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White Papers
Hierarchical Domain Partitioning for Hierarchical Architectures
August 5, 2008, 12:00am PDT
The history of parallel computing shows that good performance is heavily dependent on data locality. Prior knowledge of data access patterns allows for optimizations that reduce data movement,...
Provided by University of Virginia
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White Papers
Federation: Out-of-Order Execution Using Simple In-Order Cores
August 1, 2007, 12:00am PDT
Manycore architectures with dozens, hundreds, or thousands of threads are likely to use single-issue, in-order execution cores with simple pipelines but multiple thread contexts per core. This...
Provided by University of Virginia
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White Papers
Performance Modeling and Automatic Ghost Zone Optimization for Iterative Stencil Loops on GPUs
June 12, 2009, 12:00am PDT
Iterative Stencil Loops (ISLs) are used in many applications and tiling is a well-known technique to localize their computation. When ISLs are tiled across a parallel architecture, there are...
Provided by University of Virginia
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White Papers
A Performance Study for Iterative Stencil Loops on GPUs With Ghost Zone Optimizations
June 15, 2010, 12:00am PDT
Iterative Stencil Loops (ISLs) are used in many applications and tiling is a well-known technique to localize their computation. When ISLs are tiled across a parallel architecture, there are...
Provided by University of Virginia
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White Papers
Avoiding Cache Thrashing Due to Private Data Placement in Last-Level Cache for Manycore Scaling
October 12, 2009, 12:00am PDT
Without high-bandwidth broadcast, large numbers of cores require a scalable point-to-point interconnect and a directory protocol. In such cases, a shared, inclusive Last Level Cache (LLC) can...
Provided by University of Virginia
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White Papers
Differentiating the Roles of IR Measurement and Simulation for Power and Temperature-Aware Design
October 13, 2009, 12:00am PDT
In temperature-aware design, the presence or absence of a heatsink fundamentally changes the thermal behavior with important design implications. In recent years, chip-level InfraRed (IR) thermal...
Provided by University of Virginia
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White Papers
Accurate, Pre-RTL Temperature-Aware Design Using a Parameterized, Geometric Thermal Model
April 1, 2008, 12:00am PDT
Preventing silicon chips from negative, even disastrous thermal hazards has become increasingly challenging these days; considering thermal effects early in the design cycle is thus required. To...
Provided by University of Virginia
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White Papers
Enabling Task Parallelism in the CUDA Scheduler
July 31, 2009, 12:00am PDT
General purpose computing on Graphics Processing Units (GPUs) introduces the challenge of scheduling independent tasks on devices designed for data parallel or SPMD applications. This paper...
Provided by University of Virginia
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White Papers
Leveraging Memory Level Parallelism Using Dynamic Warp Subdivision
April 2, 2009, 12:00am PDT
SIMD organizations have shown to allow high throughput for data-parallel applications. They can operate on multiple datapaths under the same instruction sequencer, with its set of operations...
Provided by University of Virginia
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White Papers
Automated Dynamic Analysis of CUDA Programs
March 17, 2008, 12:00am PDT
Recent increases in the programmability and performance of GPUs have led to a surge of interest in utilizing them for general-purpose computations. Tools such as NVIDIA's Cuda allow programmers to...
Provided by University of Virginia
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White Papers
Thermal Modeling and Management of Microprocessors
May 1, 2009, 12:00am PDT
The most recent, and arguably one of the most difficult obstacles to the exponential growth in transistor density predicted by Moore's Law is that of removing the large amount of heat generated...
Provided by University of Virginia
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White Papers
Thunder: Towards Practical, Zero Cost Acoustic Localization for Outdoor Wireless Sensor Networks
January 1, 2011, 12:00am PST
Localization for outdoor wireless sensor networks has been a challenge for real applications. Although many solutions have been proposed, few of them can be used in real applications because of...
Provided by University of Virginia
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White Papers
ANDES: An ANalysis-Based DEsign Tool for Wireless Sensor Networks
September 23, 2007, 12:00am PDT
The authors have developed an analysis-based design tool, ANDES, for modeling a wireless sensor network system and analyzing its performance before deployment. ANDES enables designers to...
Provided by University of Virginia
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White Papers
Online Coding for Reliable Data Transfer in Lossy Wireless Sensor Networks
April 3, 2009, 12:00am PDT
Bulk transport underlies data exfiltration and code update facilities in WSNs, but existing approaches are not designed for highly lossy and variable-quality links. The authors observe that...
Provided by University of Virginia
-
White Papers
Towards Stable Network Performance in Wireless Sensor Networks
September 11, 2009, 12:00am PDT
Many applications in wireless sensor networks require communication performance that is both consistent and high quality. Unfortunately, performance of current network protocols can vary...
Provided by University of Virginia
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White Papers
Single-Threaded Mode AVF Prediction During Redundant Execution
March 2, 2009, 12:00am PST
Transient faults can lead to serious errors in execution. Providing protection for the processor core against these faults requires redundant execution, which leads to a performance loss. However,...
Provided by University of Virginia
-
White Papers
NBTI-Aware Dynamic Instruction Scheduling
March 2, 2009, 12:00am PST
NBTI is an important emerging silicon reliability problem. In this paper the authors explore a microarchitecture-level approach to mitigate NBTI related failures in the functional units of a...
Provided by University of Virginia
-
White Papers
Recovery Boosting: A Technique to Enhance NBTI Recovery in SRAM Arrays
April 22, 2010, 12:00am PDT
Negative Bias Temperature Instability (NBTI) is an important lifetime reliability problem in microprocessors. SRAM-based structures within the processor are especially susceptible to NBTI since...
Provided by University of Virginia
-
White Papers
Modeling and Analyzing NBTI in the Presence of Process Variation
December 19, 2010, 12:00am PST
With continuous scaling of transistors in each technology generation, NBTI and Process Variation (PV) have become very important silicon reliability problems for the microprocessor industry. In...
Provided by University of Virginia
-
White Papers
A Benchmark Suite for Unstructured Data Processing
November 8, 2007, 12:00am PST
A large fraction of the data that will stored and accessed in future systems is expected to be unstructured, in the form of images, audio files, etc. Therefore, it is very important to design...
Provided by University of Virginia
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White Papers
Enviro-Track: Towards an Environmental Computing Paradigm for Distributed Sensor Networks
January 1, 2011, 12:00am PST
Distributed sensor networks are quickly gaining recognition as viable embedded computing platforms. Current techniques for programming sensor networks are cumbersome, inflexible, and low-level....
Provided by University of Virginia
-
White Papers
Extended Applications of the Wireless Sensor Array (WISEAR)
June 9, 2007, 12:00am PDT
WISEAR (Wireless Sensor Array)8, provides a robust and scalable platform for virtually limitless types of data input to software synthesis engines. It is essentially a Linux based SBC (Single...
Provided by University of Virginia
-
White Papers
Wireless Dance Control: PAIR and WISEAR
December 4, 2007, 12:00am PST
WISEAR (Wireless Sensor Array) is a Linux based Embeddedx86 TS5600 SBC (Single Board Computer) specifically configured for use with music, dance and video performance technologies. The device...
Provided by University of Virginia
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White Papers
SLINC 1.0: A GUI for Controlling Synthesis and Linking Instruments in RTcmix
December 4, 2007, 12:00am PST
SLINC is graphical interface for controlling parameter fields of RTcmix instruments in real time, written using the powerful open source Gimp Tool Kit (GTK). It runs under Linux systems, and is...
Provided by University of Virginia
-
White Papers
PAWN & SPAWN: Portable and Semi-Portable Audio Workstation
December 4, 2007, 12:00am PST
PAWN consists of a laptop running Linux with full duplex audio input and output abilities. Its primary function is to facilitate performance by eliminating the need for rack mounted synthesis...
Provided by University of Virginia
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White Papers
Distributed Uplink Resource Allocation in Cognitive Radio Networks - Part II: Equilibria and Algorithms for Joint Access Point Selection and Power Allocation
February 11, 2011, 12:00am PST
The main objective of this two part paper is to formulate and address the problem of distributed uplink resource allocation in multi-carrier Cognitive Radio Networks (CRN) with multiple Access...
Provided by University of Virginia
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White Papers
Joint Distributed Access Point Selection and Power Allocation in Cognitive Radio Networks
February 10, 2011, 12:00am PST
Spectrum management has been identified as a crucial step towards enabling the technology of the Cognitive Radio Network (CRN). Most of the current works dealing with spectrum management in the...
Provided by University of Virginia
-
White Papers
A Performance Study of General-Purpose Applications on Graphics Processors Using CUDA
July 16, 2008, 12:00am PDT
Graphics Processors Unit (GPUs) provide a vast number of simple, data-parallel, deeply multithreaded cores and high memory bandwidths. GPU architectures are becoming increasingly programmable,...
Provided by University of Virginia
-
White Papers
Characterization of User-Perceived Quality of Service (QoS) in Mobile Devices Using Network Pairwise Comparisons
August 1, 2010, 12:00am PDT
This paper presents a user-centric and application-specific QoS assessment methodology for cellular communication networks. Specifically, it uses the Analytic Hierarchy Process (AHP) to evaluate...
Provided by University of Virginia
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White Papers
Efficient Privacy-Preserving Biometric Identification
February 9, 2011, 12:00am PST
The authors present an efficient matching protocol that can be used in many privacy-preserving biometric identification systems in the semi-honest setting. The most general technical contribution...
Provided by University of Virginia
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White Papers
Privacy Protection for Social Networking Platforms
May 22, 2008, 12:00am PDT
Social networking platforms integrate third-party content into social networking sites and give third-party developers access to user data. These open interfaces enable popular site enhancements...
Provided by University of Virginia
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White Papers
Private Editing Using Untrusted Cloud Services
May 9, 2011, 12:00am PDT
The authors present a general methodology for protecting the confidentiality and integrity of user data for a class of on-line editing applications. The key insight is that many of these...
Provided by University of Virginia
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White Papers
GuardRails: A Data-Centric Web Application Security Framework
June 16, 2011, 12:00am PDT
Modern web application frameworks have made it easy to create powerful web applications. Developing a secure web application, however, still requires a developer to posses a deep understanding of...
Provided by University of Virginia
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White Papers
Early Observations on the Performance of Windows Azure
April 27, 2010, 12:00am PDT
A significant open issue in cloud computing is performance. Few, if any, cloud providers or technologies offer quantitative performance guarantees. Regardless of the potential advantages of the...
Provided by University of Virginia
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White Papers
Cloud Auto-Scaling With Deadline and Budget Constraints
August 13, 2010, 12:00am PDT
Clouds have become an attractive computing platform which offers on-demand computing power and storage capacity. Its dynamic scalability enables users to quickly scale up and scale down underlying...
Provided by University of Virginia
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White Papers
Shouting To Be Heard In Advertising
December 1, 2010, 12:00am PST
Advertising competes for consumer attention, but attention is scarce. More profitable senders send more messages to break through the clutter. There may be multiple equilibria: more messages in...
Provided by University of Virginia
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White Papers
Gravity In International Finance
January 8, 2010, 12:00am PST
The past decade has witnessed an explosion of papers estimating gravity equations for cross-border financial holdings. While traditionally the territory of the international trade literature, this...
Provided by University of Virginia
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White Papers
Looking For Local Labor-Market Effects Of The NAFTA
December 16, 2010, 12:00am PST
Using US Census data for 1990 and 2000, the authors estimate effects of the NAFTA agreement on the US wages. They look for any indication of effects of the agreement on local labor markets...
Provided by University of Virginia
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White Papers
Kicking The Dog: Korea's Bureaucratic Resistance To Globalization In Reaction To Democratization
June 15, 2011, 12:00am PDT
Seven years have passed since the Korean economy was engulfed by the 1997 Asian Financial Crisis. Arguably, the country is still not fully recovered from the catastrophe almost a decade later. In...
Provided by University of Virginia
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White Papers
Data Services in Distributed Real-Time Embedded Systems
June 17, 2008, 12:00am PDT
The computing systems are becoming deeply embedded into ordinary life and interact with physical processes and events. They monitor the physical world with sensors and provide appropriate reaction...
Provided by University of Virginia
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White Papers
An Analysis of Using High-Frequency Sinusoidal Illumination to Measure the 3D Shape of Translucent Objects
March 25, 2011, 12:00am PDT
Using optical triangulation methods to measure the shape of translucent objects is difficult because subsurface scattering contaminates measurements of the "Direct" reflection at the surface. A...
Provided by University of Virginia
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White Papers
Feasibility of Dynamic Binary Parallelization
April 14, 2011, 12:00am PDT
This paper proposes DBP, an automatic technique that transparently parallelizes a sequential binary executable while it is running. A prototype implementation in simulation was able to increase...
Provided by University of Virginia
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White Papers
ParaWeaver: Performance Evaluation on Programming Models for Fine Grained Threads
May 30, 2007, 12:00am PDT
There is a trend towards multicore or manycore processors in computer architecture design. In addition, several parallel programming models have been introduced. Some extract concurrent threads...
Provided by University of Virginia
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White Papers
An Approach on Hardware Design for Computationally Intensive Image Processing Applications Based on Light Field Refocusing Algorithm
June 17, 2010, 12:00am PDT
This paper describes the performance analysis of the light field refocusing algorithm running on different hardware specifications, including the Intel Pentium 4, SSE2(Streaming SIMD Extensions),...
Provided by University of Virginia
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White Papers
Formal Verification by Reverse Synthesis
May 30, 2008, 12:00am PDT
In this paper the authors describe a novel yet practical approach to the formal verification of implementations. The approach splits verification into two major parts. The first part verifies an...
Provided by University of Virginia
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White Papers
Remote Rendering for Ultrascale Data
July 7, 2008, 12:00am PDT
The mission of the SciDAC Institute for Ultrascale Visualization is to address the upcoming petascale visualization challenges. As the authors move to petascale computation, they are seeing a...
Provided by University of Virginia
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White Papers
CMP Design Space Exploration Subject to Physical Constraints
January 1, 2011, 12:00am PST
This paper explores the multi-dimensional design space for chip multiprocessors, exploring the inter-related variables of core count, pipeline depth, superscalar width, L2 cache size, and...
Provided by University of Virginia
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White Papers
Hiding in Groups: On the Expressiveness of Privacy Distributions
May 3, 2008, 12:00am PDT
Many applications inherently disclose information because perfect privacy protection is prohibitively expensive. RFID tags, for example, cannot be equipped with the cryptographic primitives needed...
Provided by University of Virginia
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White Papers
A Sub-0.5V Lattice-Based Public-Key Encryption Scheme for RFID Platforms in 130nm CMOS
February 3, 2011, 12:00am PST
Implementing public-key cryptography on passive RFID tags is very challenging due to the limited die size and power available. Typical public-key algorithms require complex logical components such...
Provided by University of Virginia
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White Papers
Privacy Through Noise: A Design Space for Private Identification
September 13, 2009, 12:00am PDT
To protect privacy in large systems, users should be able to authenticate against a central server without disclosing their identity to others. Private identification protocols based on public key...
Provided by University of Virginia
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White Papers
Security Through Redundant Data Diversity
June 1, 2008, 12:00am PDT
Unlike other diversity-based approaches, N-variant systems thwart attacks without requiring secrets. Instead, they use redundancy (to require an attacker to simultaneously compromise multiple...
Provided by University of Virginia
-
White Papers
GuardRails: A Data-Centric Web Application Security Framework
June 16, 2011, 12:00am PDT
Modern web application frameworks have made it easy to create powerful web applications. Developing a secure web application, however, still requires a developer to posses a deep understanding of...
Provided by University of Virginia
-
White Papers
Private Editing Using Untrusted Cloud Services
May 9, 2011, 12:00am PDT
The authors present a general methodology for protecting the confidentiality and integrity of user data for a class of on-line editing applications. The key insight is that many of these...
Provided by University of Virginia
-
White Papers
Privacy Protection for Social Networking Platforms
May 22, 2008, 12:00am PDT
Social networking platforms integrate third-party content into social networking sites and give third-party developers access to user data. These open interfaces enable popular site enhancements...
Provided by University of Virginia
-
White Papers
Efficient Privacy-Preserving Biometric Identification
February 9, 2011, 12:00am PST
The authors present an efficient matching protocol that can be used in many privacy-preserving biometric identification systems in the semi-honest setting. The most general technical contribution...
Provided by University of Virginia
-
White Papers
Characterization of User-Perceived Quality of Service (QoS) in Mobile Devices Using Network Pairwise Comparisons
August 1, 2010, 12:00am PDT
This paper presents a user-centric and application-specific QoS assessment methodology for cellular communication networks. Specifically, it uses the Analytic Hierarchy Process (AHP) to evaluate...
Provided by University of Virginia
-
White Papers
A Performance Study of General-Purpose Applications on Graphics Processors Using CUDA
July 16, 2008, 12:00am PDT
Graphics Processors Unit (GPUs) provide a vast number of simple, data-parallel, deeply multithreaded cores and high memory bandwidths. GPU architectures are becoming increasingly programmable,...
Provided by University of Virginia
-
White Papers
Joint Distributed Access Point Selection and Power Allocation in Cognitive Radio Networks
February 10, 2011, 12:00am PST
Spectrum management has been identified as a crucial step towards enabling the technology of the Cognitive Radio Network (CRN). Most of the current works dealing with spectrum management in the...
Provided by University of Virginia
-
White Papers
Distributed Uplink Resource Allocation in Cognitive Radio Networks - Part II: Equilibria and Algorithms for Joint Access Point Selection and Power Allocation
February 11, 2011, 12:00am PST
The main objective of this two part paper is to formulate and address the problem of distributed uplink resource allocation in multi-carrier Cognitive Radio Networks (CRN) with multiple Access...
Provided by University of Virginia
-
White Papers
PAWN & SPAWN: Portable and Semi-Portable Audio Workstation
December 4, 2007, 12:00am PST
PAWN consists of a laptop running Linux with full duplex audio input and output abilities. Its primary function is to facilitate performance by eliminating the need for rack mounted synthesis...
Provided by University of Virginia
-
White Papers
SLINC 1.0: A GUI for Controlling Synthesis and Linking Instruments in RTcmix
December 4, 2007, 12:00am PST
SLINC is graphical interface for controlling parameter fields of RTcmix instruments in real time, written using the powerful open source Gimp Tool Kit (GTK). It runs under Linux systems, and is...
Provided by University of Virginia
-
White Papers
Wireless Dance Control: PAIR and WISEAR
December 4, 2007, 12:00am PST
WISEAR (Wireless Sensor Array) is a Linux based Embeddedx86 TS5600 SBC (Single Board Computer) specifically configured for use with music, dance and video performance technologies. The device...
Provided by University of Virginia
-
White Papers
Extended Applications of the Wireless Sensor Array (WISEAR)
June 9, 2007, 12:00am PDT
WISEAR (Wireless Sensor Array)8, provides a robust and scalable platform for virtually limitless types of data input to software synthesis engines. It is essentially a Linux based SBC (Single...
Provided by University of Virginia
-
White Papers
Enviro-Track: Towards an Environmental Computing Paradigm for Distributed Sensor Networks
January 1, 2011, 12:00am PST
Distributed sensor networks are quickly gaining recognition as viable embedded computing platforms. Current techniques for programming sensor networks are cumbersome, inflexible, and low-level....
Provided by University of Virginia
-
White Papers
A Benchmark Suite for Unstructured Data Processing
November 8, 2007, 12:00am PST
A large fraction of the data that will stored and accessed in future systems is expected to be unstructured, in the form of images, audio files, etc. Therefore, it is very important to design...
Provided by University of Virginia
-
White Papers
Modeling and Analyzing NBTI in the Presence of Process Variation
December 19, 2010, 12:00am PST
With continuous scaling of transistors in each technology generation, NBTI and Process Variation (PV) have become very important silicon reliability problems for the microprocessor industry. In...
Provided by University of Virginia
-
White Papers
Recovery Boosting: A Technique to Enhance NBTI Recovery in SRAM Arrays
April 22, 2010, 12:00am PDT
Negative Bias Temperature Instability (NBTI) is an important lifetime reliability problem in microprocessors. SRAM-based structures within the processor are especially susceptible to NBTI since...
Provided by University of Virginia
-
White Papers
NBTI-Aware Dynamic Instruction Scheduling
March 2, 2009, 12:00am PST
NBTI is an important emerging silicon reliability problem. In this paper the authors explore a microarchitecture-level approach to mitigate NBTI related failures in the functional units of a...
Provided by University of Virginia
-
White Papers
Single-Threaded Mode AVF Prediction During Redundant Execution
March 2, 2009, 12:00am PST
Transient faults can lead to serious errors in execution. Providing protection for the processor core against these faults requires redundant execution, which leads to a performance loss. However,...
Provided by University of Virginia
-
White Papers
Towards Stable Network Performance in Wireless Sensor Networks
September 11, 2009, 12:00am PDT
Many applications in wireless sensor networks require communication performance that is both consistent and high quality. Unfortunately, performance of current network protocols can vary...
Provided by University of Virginia
-
White Papers
Online Coding for Reliable Data Transfer in Lossy Wireless Sensor Networks
April 3, 2009, 12:00am PDT
Bulk transport underlies data exfiltration and code update facilities in WSNs, but existing approaches are not designed for highly lossy and variable-quality links. The authors observe that...
Provided by University of Virginia
-
White Papers
ANDES: An ANalysis-Based DEsign Tool for Wireless Sensor Networks
September 23, 2007, 12:00am PDT
The authors have developed an analysis-based design tool, ANDES, for modeling a wireless sensor network system and analyzing its performance before deployment. ANDES enables designers to...
Provided by University of Virginia
-
White Papers
Thunder: Towards Practical, Zero Cost Acoustic Localization for Outdoor Wireless Sensor Networks
January 1, 2011, 12:00am PST
Localization for outdoor wireless sensor networks has been a challenge for real applications. Although many solutions have been proposed, few of them can be used in real applications because of...
Provided by University of Virginia
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