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Real-time scheduling algorithms for multiprocessor systems have been the subject of considerable recent interest. For such an algorithm to be truly useful in practice, support for semaphore-based locking must be provided. However, for many global scheduling algorithms, no such mechanisms have been proposed. Furthermore, in the partitioned case, most prior(More)
We present a real-time, Linux-based testbed called LITMUS RT , which we have developed for empirically evaluating multiprocessor real-time scheduling algorithms. We also present the results from such an evaluation, in which partitioned earliest-deadline-first (EDF) scheduling, pre-emptive and nonpreemptive global EDF scheduling, and two variants of the(More)
Hemisphere asymmetry in the control of parasympathetic outflow to the sino-atrial node of the heart was studied in healthy human subjects using lateralized film presentation for selective sensory stimulation of the hemispheres and power spectral analysis of heart rate variability as a measure of vagal tone. There was a clear and consistent left hemisphere(More)
Hemisphere asymmetry in sympathetic control of myocardial performance was studied in healthy human subjects using lateralized film presentation for selective sensory stimulation of the hemispheres and impedance cardiography for the evaluation of cardiac output, systolic time intervals and myocardial contractility. Results revealed a clear and consistent(More)
In the present study we have evaluated the complexity and scaling properties of the morphology of retinal neurons using fractal dimension as a quantitative parameter. We examined a large number of cells from Pseudemys scripta and Mauremys caspica turtles that had been labeled using Golgi-impregnation techniques, intracellular injection of Lucifer Yellow(More)
In the domain of multiprocessor real-time systems, there has been a wealth of recent work on scheduling, but relatively little work on the equally-important topic of synchronization. When synchronizing accesses to shared resources, four basic options exist: lock-free execution, wait-free execution, spin-based locking, and suspension-based locking. To our(More)
  • Anand Srinivasan, James H Anderson, Sanjoy K Baruah, Kevin Jeffay, Giorgio Buttazzo, Prasun Dewan +12 others
  • 2003
ii c 2003 Anand Srinivasan ALL RIGHTS RESERVED iii ABSTRACT Anand Srinivasan Efficient and Flexible Fair Scheduling of Real-time Tasks on Multiprocessors (Under the direction of James H. Anderson) Proportionate fair (Pfair) scheduling is the only known way to optimally schedule periodic real-time task systems on multiprocessors in an on-line manner. Under(More)
  • Shelby Hyatt Funk, Sanjoy K Baruah, James Anderson, Kevin Jeffay, Jane W S Liu, Montek Singh +9 others
  • 2004
ii iii c 2004 Shelby Hyatt Funk ALL RIGHTS RESERVED iv v ABSTRACT SHELBY H. FUNK: EDF Scheduling on Heterogeneous Multiprocessors. (Under the direction of Sanjoy K. Baurah) The goal of this dissertation is to expand the types of systems available for real-time applications. Specifically, this dissertation introduces tests that ensure jobs will meet their(More)
We present a real-time, Linux-based testbed called LITMUS RT , which we have developed for empirically evaluating multiprocessor real-time scheduling algorithms. We also present the results from such an evaluation, in which partitioned earliest-deadline-first (EDF) scheduling, pre-emptive and nonpreemptive global EDF scheduling, and two variants of the(More)