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From Communications of the ACM

Technical Perspective: Sora Promises Lasting Impact

The objective of Sora is to build a software defined radio that combines the performance and fidelity of hardware...

Difference Engine: Harnessing Memory Redundancy in Virtual Machines
From Communications of the ACM

Difference Engine: Harnessing Memory Redundancy in Virtual Machines

Virtual machine monitors are a popular platform for Internet hosting centers and cloud-based compute services. But main memory is not amenable to multiplexed hardware...

From Communications of the ACM

Technical Perspective: A VM 'Engine' That Makes a Difference

The past decade has witnessed a renaissance in server virtualization. Diwaker Gupta et al. present a novel approach for significantly improving the efficiency of...

Phase Change Memory Architecture and the Quest For Scalability
From Communications of the ACM

Phase Change Memory Architecture and the Quest For Scalability

Memory scaling is in jeopardy as charge storage and sensing mechanisms become less reliable for prevalent memory technologies. In contrast, phase change memory...

From Communications of the ACM

Technical Perspective: Technology Scaling Redirects Main Memories

As predicted by Intel's Gordon Moore in 1965, the number of transistors that can be integrated on one die continues to double approximately...

Toward Robotic Cars
From Communications of the ACM

Toward Robotic Cars

Recent challenges organized by DARPA have induced a significant advance in technology for autopilots for cars; similar to those already used in aircraft and marine...

From Communications of the ACM

Technical Perspective: New Bar Set For Intelligent Vehicles

Sebastian Thrun gives us a glimpse into the design and implementation of two winning DARPA grand challenge entries...

Post-Silicon Bug Localization For Processors Using IFRA
From Communications of the ACM

Post-Silicon Bug Localization For Processors Using IFRA

IFRA overcomes major challenges associated with a very expensive step in post-silicon validation of processors — pinpointing a bug location and the instruction...

From Communications of the ACM

Technical Perspective: Want to Be a Bug Buster?

Microprocessor performance has increased exponentially. These chips with ever increasing complexity are not always fully functional on...

Structural Characterizations of Schema-Mapping Languages
From Communications of the ACM

Structural Characterizations of Schema-Mapping Languages

Information integration is a key challenge faced by all major organizations, business and governmental ones alike. Two research...

From Communications of the ACM

Technical Perspective: Schema Mappings: Rules For Mixing Data

When you search for products on Amazon.com, you are seeing results from thousands of vendor databases that were developed before Amazon existed. Did you ever wonder...

Statistical Analysis of Circuit Timing Using Majorization
From Communications of the ACM

Statistical Analysis of Circuit Timing Using Majorization

Future miniaturization of silicon transistors following Moore's Law may be in jeopardy as it becomes harder to precisely define the behavior and shape of nanoscale...

From Communications of the ACM

Technical Perspective: Where the Chips May Fall

The traditional approach to circuit design has been to build chips that work correctly at extreme-case process...

Apprenticeship Learning For Helicopter Control
From Communications of the ACM

Apprenticeship Learning For Helicopter Control

Autonomous helicopter flight is widely regarded to be a highly challenging control problem. As helicopters are highly unstable and exhibit complicated dynamical...

From Communications of the ACM

Technical Perspective: The Ultimate Pilot Program

In one scene from The Matrix, two leaders of the human resistance are trapped on the roof of a skyscraper. The only means of escape is by helicopter, which neither...

Two Hardware-Based Approaches For Deterministic Multiprocessor Replay
From Communications of the ACM

Two Hardware-Based Approaches For Deterministic Multiprocessor Replay

Modern computer systems are inherently nondeterministic due to a variety of events that occur during an execution. The lack of repeatability that arises from this...

From Communications of the ACM

Technical Perspective: Software and Hardware Support For Deterministic Replay of Parallel Programs


Integrating Nand Flash Devices Onto Servers
From Communications of the ACM

Integrating Nand Flash Devices Onto Servers

In this paper, we examine the use of Flash storage in the server domain. Wear-out has the potential to limit the use of Flash in this domain. To seriously consider...

From Communications of the ACM

Technical Perspective: Integrating Flash Devices

Flash memory nowadays seems to be in every discussion about system architecture. Sure enough, flash memory boasts...

From Communications of the ACM

Technical Perspective: Transactional Memory in the Operating System

The long tradition of building ever-faster processors is ending, with the computer industry instead putting more...
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