The following text will give some insight into activities of the PVM users in Germany. The overview presented is far from being complete and all information was collected by directly contacting persons known to use PVM. However, more than a dozen of sites at universities and research institutes sent us material about their programs, hardware conngurations etc. They also gave details on their ex...

There are significant programming and methodological problems when developing PVM programs, the process communication structure of which does not form trees but arbitrary graphs. We present a design methodology, called Ensemble, and the appropriate PVM techniques and tools for the efficient composition of arbitrarily structured PVM programs. In Ensemble PVM programs are described by annotated P...

PSPVM in an implementation of the PVM package on top of ParaStations high-speed interconnent for workstation clusters. The ParaStation system uses user level communication for message exchange and removes the operating system from the critical path of message transmission. ParaStations user interface consists of a user-level socket emulation. Thus, we need only minor changes to the standard PVM...

| We present PVM-SCI, an implementation of the PVM 3.4 message passing standard for workstation clusters with scalable coherent interface (SCI). PVM-SCI provides two complementary communication schemes: the usual UDP/IP protocol for messages sent via PVM daemons, and a fast communication protocol that has been implemented directly on top of SCI for messages sent with the PvmRouteDirect directiv...

This paper presents new features of PVM, a popular standard for writing parallel programs which execute over networks of heterogeneous machines. Although PVM has become an important infrastructure for parallel programmers, we continue to develop the system based both on user feedback and our own research interests. In this paper we present new communications routines and brieey characterize the...

The origin of the vacuole membrane surrounding the intracellular protozoan parasite Toxoplasma gondii is not known. Although unique secretory organelles, the rhoptries, discharge during invasion of the host cell and may contribute to the formation of this parasitophorous vacuole membrane (PVM), no direct evidence for this hypothesis exists. Using a novel approach we have determined that parasit...

Xab (X-window Analysis and deBugging) is a tool for run time monitoring of PVM (Parallel Virtual Machine) programs. PVM supports the programming of a network of heterogeneous computers as a single parallel computer. Using Xab, PVM programs can easily be instrumented and monitored. Xab uses PVM to monitor PVM programs. This makes Xab very portable but it leads to interesting issues of how to mak...