In this paper a new method dynamic ticking is proposed to control tasks more e ciently on real time operating systems It makes higher priority tasks run more e ciently by preventing useless occurrences of the timer interrupt request Operation of dynamic ticking is presented and several issues are discussed to be adopted at previous systems To estimate the performance the schedulability is analy...

A preliminary MPI library has been implemented for the Fujitsu AP1000+ multicomputer running the AP/Linux operating system. Under this environment, parallel programs may be dedicated to a fixed partition, or a number of parallel programs may share a partition. Therefore, the MPI library has been constructed so that messaging operations can be driven by polling and/or interrupt techniques. It ha...

Much of the human-machine dialogue research in the literature tacitly assumes a “synchronous” dialogue model; user talks, system acts, system replies. In particular, the user is not supposed to interrupt the system, neither when it talks nor acts. In this paper, we argue that the synchronous model is not appropriate for most interesting real-life applications, but there is a need for asynchrono...

Both predictable interprocessor synchronization and fast interrupt response are required for real-time systems constructed using asymmetric shared-memory multiprocessors. This paper points out the problem that conventional spin lock algorithms cannot satisfy both requirements at the same time. To solve this problem, we have proposed an algorithm which is an extension of queueing spin locks modi...

QUESTION I have a patient with persistent breast and nipple thrush. Other therapies have failed, so I have decided to treat her with a loading dose of 400 mg of oral fluconazole followed by 100 mg twice daily for at least 2 weeks. Is there any need for her to interrupt breastfeeding during this treatment? ANSWER Available data regarding fluconazole use during breastfeeding are reassuring. Flu...

Use of a logic state analyser as a hardware monitoring tool is described. The interrupt handling routines of the UNIX* operating system, running on a Perkin-Elmer 7/32, were measured before and after major code modification. CLock handLing is used as an example. Performance improvements included a reduction in the execution time of the common interrupt handler from 654 to 55 microseconds and a ...

We present a model for the speciication of time restrictions in communicating systems that is based on predicates. The model ts for continuous and discrete time domains, but we x our attention to the non-negative reals. It is possible to express delays, timed interrupts and the requirement that a process should nish within a given time by means of operators on speciications. Some propositions a...

Recent research suggests that many norms may be upheld by closet deviants who engage in enforcement so as to hide their deviance. But various empirical accounts indicate that audiences are often quite sensitive to this ulterior motive. Our theory and experimental evidence identify when inferences of ulterior motive are drawn and clarify the implications of such inferences. Our main test pivots ...

This study proposes an alternative enhancement for the Enhanced Associativity Based Routing (EABR) method which is a derivation of ABR (Associativity Based Routing) by relative speed and relative distance estimation using the received power strength (RPS) of the nodes. In this study, it is shown that EABR outperforms some other well known protocols. The performance of EABR is improved in terms ...