Integrating Coordination Features in PVM

. In this paper we focus on coordination for parallel systems controlled by the PVM software package. We describe several extensions to PVM which allow the use of extended coordination features like generative communication or client/server programming. 1 Introduction The coordination of distributed applications has recently become a scientific discipline in its own right and is described for example as "managing dependencies among independent entities" [10]. This can be achieved using a coordination language, as "the linguistic embodiment of a coordination model" [6], to express and describe the relationships between the active entities running in parallel. This research has led to the development of several coordination models and corresponding coordination languages like [5, 2, 3]. Although these models deserve a lot of attention from a theoretical point of view, their implementations have shown performance problems. On the other hand, PVM [11] is an efficient system which allows t..