While it is widely believed that preemptability is a necessary requirement for developing real-time software, there are additional costs involved with preemptive scheduling, as compared to non-preemptive scheduling. Furthermore, in the context of fixed-priority scheduling, feasibility of a task set with nonpreemptive scheduling does not imply feasibility with preemptive scheduling (and vice-ver...

A multiprocessor virtual machine benefits its guest operating system in supporting scalable job throughput and request latency—useful properties in server consolidation where servers require several of the system processors for steady state or to handle load bursts. Typical operating systems, optimized for multiprocessor systems in their use of spin-locks for critical sections, can defeat flexi...

INTRODUCTION Preemption is a legislative or judicial arrangement in which a higher level of government precludes lower levels of government from exercising authority over a topic. In the area of smoke-free policy, preemption typically takes the form of a state law that prevents communities from adopting local smoking restrictions. BACKGROUND A broad consensus exists among tobacco control prac...

Global limited preemptive real-time scheduling in multiprocessor systems using Fixed Preemption Points (FPP) brings in an additional challenge with respect to the choice of the task to be preempted in order to maximize schedulability. Two principal choices with respect to the preemption approach exist 1) the scheduler waits for the lowest priority job to become preemptible, 2) the scheduler pre...

Connection preemption can be a means to provide available and reliable services to high-priority connections when a network is heavily loaded and connection request arrival patterns are unknown, or when the network experiences link or node failures. We present a simulation study of preemption in a general connection-oriented network setting. Based on the observations made in this study, we have...

Research summary Our article examines the deliberate creation of learning opportunities in global rollout innovations. Some firms launch only a subset markets at first, with later launches being conditional on debut-market performance. Such sequencing decreases downside potential innovation failure but increases competitive preemption. Consistent this trade-off, handset makers during feature-ph...

Recent advances in DNA analysis, global climate modeling and computational fluid dynamics have increased the demand for supercomputing resources. Through increasing the efficiency and throughput of existing supercomputing centers, additional computational power can be provided for these applications. Backfill has been shown to increase the efficiency of supercomputer schedulers for large, homog...

CCA is an attractive account of harm. It has many virtues and many advantages over its competitors. But I won’t explore those features here. Ben Bradley gives a nice summary of them, though he ultimately rejects CCA (2012: 396–7, 401). In this paper, I’ll reply to two objections to CCA that haven’t been adequately addressed in the literature. Some critics think that certain omission and preempt...

We propose a taxonomy of preemptive (suspensive and abortive) operators capturing the intuition of such operators that exist in the various synchronous languages. Some of the main contributions of the paper are: a precise notion of preemption is established at a structural level ; we show that the class of suspensive operators is strictly more expressive than abortive operators, and we show tha...

This paper examines the problem of guaranteeing response times, on a uniprocessor, to sporadic tasks with preemption constraints. The preemption constraints arise from the fact that tasks require exclusive access to shared software resources during portions of their computations, The primary objective is to determine conditions under which we can guarantee a response time to each task which is ...