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- research-articleFebruary 2012
Supporting Overcommitted Virtual Machines through Hardware Spin Detection
IEEE Transactions on Parallel and Distributed Systems (TPDS), Volume 23, Issue 2Pages 353–366https://doi.org/10.1109/TPDS.2011.143Multiprocessor operating systems (OSs) pose several unique and conflicting challenges to System Virtual Machines (System VMs). For example, most existing system VMs resort to gang scheduling a guest OS's virtual processors (VCPUs) to avoid OS ...
- research-articleJanuary 2012
Reducing Unauthorized Modification of Digital Objects
IEEE Transactions on Software Engineering (ISOF), Volume 38, Issue 1Pages 191–204https://doi.org/10.1109/TSE.2011.7We consider the problem of malicious modification of digital objects. We present a protection mechanism designed to protect against unauthorized replacement or modification of digital objects while still allowing authorized updates transparently. We use ...
- research-articleDecember 2011
SenSpire OS: A Predictable, Flexible, and Efficient Operating System for Wireless Sensor Networks
IEEE Transactions on Computers (ITCO), Volume 60, Issue 12Pages 1788–1801https://doi.org/10.1109/TC.2011.58The development of a modern sensor network is difficult because of the long-term unattended operation mode, diverse application requirements, and stringent resource constraints. To address these issues, we present SenSpire OS, a predictable, flexible, ...
- research-articleAugust 2009
Striping-Aware Sequential Prefetching for Independency and Parallelism in Disk Arrays with Concurrent Accesses
IEEE Transactions on Computers (ITCO), Volume 58, Issue 8Pages 1146–1152https://doi.org/10.1109/TC.2009.14Traditional studies on disk arrays have focused on parallelism or load balance of disks. However, this paper reveals that the independency of disks is more important than parallelism for concurrent reads of large numbers of processes in striped disk ...
- research-articleJuly 2009
A Homogeneous Architecture for Power Policy Integration in Operating Systems
IEEE Transactions on Computers (ITCO), Volume 58, Issue 7Pages 945–955https://doi.org/10.1109/TC.2008.180A significant volume of research has concentrated on operating system (OS)-directed power management. The primary focus of previous research has been the development of better policies. In this paper, we provide evidence that one policy may outperform ...
- research-articleFebruary 2007
The Design of New Journaling File Systems: The DualFS Case
IEEE Transactions on Computers (ITCO), Volume 56, Issue 2Pages 267–281https://doi.org/10.1109/TC.2007.36This paper describes the foundation, design, implementation, and evaluation of DualFS, a new high-performance journaling file system which has the same consistency guarantees as traditional journaling file systems but a greater performance. DualFS ...
- research-articleJuly 2006
Predictable Performance in SMT Processors: Synergy between the OS and SMTs
- Francisco J. Cazorla,
- Peter M. W. Knijnenburg,
- Rizos Sakellariou,
- Enrique Fernandez,
- Alex Ramirez,
- Mateo Valero
IEEE Transactions on Computers (ITCO), Volume 55, Issue 7Pages 785–799https://doi.org/10.1109/TC.2006.108Current Operating Systems (OS) perceive the different contexts of Simultaneous Multithreaded (SMT) processors as multiple independent processing units, although, in reality, threads executed in these units compete for the same hardware resources. ...
- research-articleNovember 2005
Network Interface Data Caching
IEEE Transactions on Computers (ITCO), Volume 54, Issue 11Pages 1394–1408https://doi.org/10.1109/TC.2005.185Network interface data caching reduces local interconnect traffic on network servers by caching frequently-requested content on a programmable network interface. The operating system on the host CPU determines which data to store in the cache and for ...
- research-articleMarch 2003
An Improved Rate-Monotonic Admission Control and Its Applications
IEEE Transactions on Computers (ITCO), Volume 52, Issue 3Pages 337–350https://doi.org/10.1109/TC.2003.1183948Rate-monotonic scheduling (RMS) is a widely used real-time scheduling technique. This paper proposes RBound, a new admission control for RMS. RBound has two interesting properties. First, it achieves high processor utilization under certain conditions. ...