The Michigan Engineer News Center

Hongwei Liao, EE Systems Grad Student, awarded Rackham Predoctoral Fellowship

Liao's research contributes theoretical developments on the control of Petri nets, and has potential to be extended to a broader class of resource allocation systems.| Medium Read
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IMAGE:  Hongwei Liao, with a graphic of the Gadara Petri net model of the main() function in the OpenLDAP software showing on the screen behind him.

Hongwei Liao, a graduate student in the Electrical Engineering:Systems program, received a Rackham Predoctoral Fellowship to support his research while he completes his dissertation on Modeling, Analysis, and Control of a Class of Resource Allocation Systems Arising in Concurrent Software. The Rackham Predoctoral Fellowship is awarded to outstanding doctoral candidates in the final stages of their program.

Mr. Liao describes the background and specifics of his research, and expected contribution to the field:

Background

In the past decade, computer hardware has undergone a true revolution, moving from uniprocessor architectures to multiprocessor architectures, or multicore. In order to exploit the full potential of multicore hardware, there is an unprecedented interest in parallelizing the applications that were previously conducted in series. This trend forces parallel programming upon the average programmer. However, reasoning about concurrency is challenging for human programmers. The computer industry faces a crisis because multicore architectures are making parallel programming unavoidable but concurrency bugs are making it too costly and error-prone.

Research

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IMAGE:  Research poster

The broad context for my research is the Gadara project [see 2009 article in Computer Magazine], which applies Discrete Control Theory to computing problems. My dissertation attacks the concurrency crisis by developing new ways to eliminate concurrency bugs automatically. Building on the foundation of Discrete Control Theory, my dissertation develops a novel multi-disciplinary framework for modeling, analyzing, and dynamically controlling concurrent software execution to provably eliminate an important class of failures, circular-wait deadlocks, which arise when tasks prevent one another from making forward progress. The Gadara project is supported by NSF and HP Labs.

Contribution

The proposed formal modeling and control framework will provably eliminate the potential circular-wait deadlocks in software, and allow programmers to write correct and efficient software with increased safety, confidence, and productivity. Moreover, my research also contributes new theoretical developments on the control of Petri nets. It also has significant potential to be extended to a broader class of resource allocation systems.

His thesis advisor is Prof. Stéphane Lafortune, a member of the Systems Laboratory.

hongwei liao
research poster
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Contact

Catharine June
ECE Communications and Marketing Manager

Electrical Engineering and Computer Science

(734) 936-2965

3301 EECS

BepiColombo approaching Mercury. Credit: European Space Agency

U-M researchers to help unravel Mercury, solar system mysteries

In ESA's BepiColombo mission, an examination of the particles in Mercury's upper atmosphere will shed light on what the planet is made of. | Medium Read