Since version 2 of the Message Passing Interface (MPI) the MPI job has the ability to start new processes dynamically at runtime. The MPI implementation has to care for the creation of new communication channels in those situations. This work desribes the implications of dynamic process creation on an communication module for the Scalable Coherent Interface (SCI). The module is developed for th...

The paper deals with radio network distributed algorithms where nodes are not aware of their one hop neighborhood. Given an n-node graph modeling a multihop network of radio devices, we give a O(log n) time distributed algorithm that computes w.h.p., a constant approximation value of the degree of each node. We also provide a O(∆ log n+ log n) time distributed algorithm that computes w.h.p., a ...

This paper presents the "Planned Direct Transfer" programming model, developed by Mercury Computer Systems to meet the requirements of embedded high-performance computing applications. In this model, data transfers are "Planned" before they occur, resulting in low software overhead execution; they are also "Direct"&emdash;they do not require intermediate data copying. This paper locates the Pla...

This article describes the ongoing work of real-time message passing interface (MPI) standardization. Real-time MPI (MPI/RT) provides a consistent set of extensions and, in some cases, restrictions to the high-performance computing Message Passing Interface Standard, emphasizing changes that enable and support real-time communication and are supportable on embedded and other real-time systems. ...

Prediction of speedup obtained from parallelization plays an important role in converting serial applications into parallel ones. Several parameters affect the execution time of an application. In this paper we experimentally and theoretically study the effect of some of these parameters on the execution time of Message Passing Interface based applications

In our previous work, we developed a security system which detects malicious behaviors at systemcall level. It first creates users’ personal profiles for all users of a close environment and an attacker profile for all hackers to keep track of their usage behaviors as the computer forensic features, and then determines whether or not a legally login user u is the account holder or a hacker by c...

MPI (Message Passing Interface) is getting more popular and important even in the Grid, but its performance still remains a problem, which is caused by the communication bottleneck on wide area links. To overcome such performance wall problem, we propose a dynamic topology selection which is a kind of resource selection method. It provides an effective resource selection service based on four p...

Bayesian inference is now widely established as one of the principal foundations for machine learning. In practice, exact inference is rarely possible, and so a variety of approximation techniques have been developed, one of the most widely used being a deterministic framework called variational inference. In this paper we introduce Variational Message Passing (VMP), a general purpose algorithm...