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Research
Synopsis:
Due to the proliferation of battery-powered embedded
computing devices (e.g., PDAs, cell phones
and laptops), energy has become the first-class resource in computing
systems and power-aware computing has become an important research
area. Despite the recent progress in this area, a number of serious
challenges remain to be addressed as the technology size shriks and
transient faults become more prominent. For autonomous
critical real-time embedded applications, such as satellite and
surveillance systems, where system reliability is as important as
energy efficiency, managing energy consumption while preserving system
reliability is desired. The problem becomes more complicated when
considering the relationship between fault rate, temperature (i.e.,
thermal effects), cosmic ray radiations and energy management
techniques.
This project
undertakes a comprehensive study of the interplay between energy
management and transient fault recovery in real-time embedded systems.
First, a generalized transient fault model for DVFS-enabled systems is
being developed that considers the effects of radiation, temperature
and electromagnetic interference. Second, focusing on operating system
level algorithms and tools, the project is developing an integrated,
reliability-aware power management framework for different types of
embedded and real-time systems. The framework enables a trade-off
analysis for energy savings and aggregate reliability to be carried
out. Adaptive schemes that dynamically improve the system performance
by monitoring system's execution at run-time are also investigated.
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Publications:
- Journal Articles
- Xuan Qi, Dakai Zhu and Hakan Aydin, Global Scheduling
Based Reliability-Aware Power Management for Multiprocessor Real-Time
Systems, Real-Time Systems: The International Journal of Time-Critical
Computing Systems, Special Issue on Energy Aware Real-Time Systems,
vol. 47, no. 2, pp. 109-142 March, 2011 [DOI:
10.1007/s11241-011-9117-x]
- Baoxian Zhao, Hakan Aydin and Dakai Zhu, On Maximizing
Reliability of Real-Time Embedded Applications under Hard Energy
Constraint, IEEE Transactions on Industrial Informatics, vol. 6, no. 3,
pp. 316 - 328, Aug. 2010 [DOI:
10.1109/TII.2010.2051970]
- Dakai Zhu and Hakan Aydin, Reliability-Aware Energy
Management for Periodic Real-Time Tasks, IEEE Transactions on
Computers, vol. 58, no. 10, pp. 1382 - 1397, Oct. 2009 [DOI:
10.1109/TC.2009.56]
- Dakai Zhu, Rami Melhem and Daniel Mosse, Energy Efficient
Redundant Configurations for Real-Time Parallel Reliable Servers.
Real-Time Systems: The International Journal of Time-Critical Computing
Systems, vol. 41, no. 3, pp. 195 - 221, April, 2009 [DOI:10.1007/s11241-009-9067-8]
- Conference Papers
- Xuan Qi, Dakai Zhu and Hakan Aydin, A Study of Utilization Bound and
Run-Time Overhead for Cluster Scheduling in Multiprocessor Real-Time
Systems, in the Proc. of the IEEE International Conference on
Embedded and Real-Time Computing Systems and Applications (RTCSA),
Macau SAR, China, Aug. 23-25, 2010
- Xuan Qi, Dakai Zhu and Hakan Aydin, Global Reliability-Aware Power
Management for Multiprocessor Real-Time Systems, in the Proc. of
the IEEE International Conference on Embedded and Real-Time Computing
Systems and Applications (RTCSA), Macau SAR, China, Aug. 23-25, 2010
- Baoxian Zhao, Hakan Aydin and Dakai Zhu, Enhanced Reliability-Aware Power
Management through Shared Recovery Technique, in the Proc. of the
IEEE/ACM Int'l Conference on Computer Aided Design (ICCAD), San Jose,
CA, Nov. 2009
- Dakai Zhu, Hakan Aydin and Jian-Jia Chen, Optimistic Reliability Aware
Energy Management for Real-Time Tasks with Probabilistic Execution Times,
in the Proc. of the 29th IEEE Real-Time Systems Symposium (RTSS'08),
Barcelona, Spain, Nov. 29 - Dec. 3, 2008
- Baoxian Zhao, Hakan Aydin and Dakai Zhu, Reliability-Aware Dynamic Voltage
Scaling for Energy-Constrained Real-Time Embedded Systems, in the
Proc. of the IEEE International Conference on Computer Design
(ICCD'08), Lake Tahoe, CA, Oct. 12-15, 2008
- Dakai Zhu, Xuan Qi and Hakan Aydin, Energy Management for Periodic
Real-Time Tasks with Variable Assurance Requirements, in the Proc.
of the IEEE International Conference on Embedded and Real-Time
Computing Systems and Applications (RTCSA), Kaohsiung, Taiwan ROC, Aug.
25-27, 2008
- Technical Reports
- Xuan Qi, Dakai Zhu and Hakan Aydin, Global Scheduling
Based Reliability-Aware Power Management for Multiprocessor Real-Time
Systems, CS-TR-2010-014,
Department of Computer Science, University of Texas at San Antonio,
Sept. 2010
- Xuan Qi and Dakai Zhu, Energy Efficient Block-Partitioned
Multicore Processors for Parallel Applications, CS-TR-2010-009,
Department of Computer Science, University of Texas at San Antonio,
Jul. 2010
- Dakai Zhu and Hakan Aydin (GMU), Reliability-Aware Energy
Management for Periodic Real-Time Tasks , CS-TR-2008-005,
Department of Computer Science, University of Texas at San Antonio,
Mar. 2008
- Dissertation and Thesis
- Xuan Qi, PhD Dissertation: "Scheduling for Energy and
Reliability Management on Multiprocessor Real-Time Systems", The
University of Texas at San Antonio, May 2011
- Nirali Patel, Master Thesis: "Fixed-Priority Based
Reliability Aware Energy Management for Periodic Real-Time Tasks", The
University of Texas at San Antonio, December 2007
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