WoTUG - The place for concurrent processes

Annual Conference: Communicating Process Architectures

Communicating Process Architectures 2018, the 40th. WoTUG conference on concurrent and parallel systems, takes place from Sunday August 19th. to Wednesday August 22nd. 2018 and is hosted by Professor Dr. Rainer Spallek, Chair of VLSI Design, Diagnostics and Architecture at the Faculty of Computer Science, Technische Universität Dresden, Germany. The conference is organised by Dr. Spallek in collboration with Oliver Knodel and Uwe Mielke and in partnership with WoTUG.

About WoTUG

WoTUG provides a forum for the discussion and promotion of concurrency ideas, tools and products in computer science. It organises specialist workshops and annual conferences that address key concurrency issues at all levels of software and hardware granularity. WoTUG aims to progress the leading state of the art in:

  • theory (programming models, process algebra, semantics, ...);
  • practice (multicore processors and run-times, clusters, clouds, libraries, languages, verification, model checking, ...);
  • education (at school, undergraduate and postgraduate levels, ...);
  • applications (complex systems, modelling, supercomputing, embedded systems, robotics, games, e-commerce, ...);
and to stimulate discussion and ideas on the roles concurrency will play in the future:
  • for the next generation of scalable computer infrastructure (hard and soft) and application, where scaling means the ability to ramp up functionality (stay in control as complexity increases) as well as physical metrics (such as absolute performance and response times);
  • for system integrity (dependability, security, safety, liveness, ...);
  • for making things simple.
Of course, neither of the above sets of bullets are exclusive.

WoTUG publications

A database of papers and presentations from WoTUG conferences is here. The Abstract below has been randomly selected from this database.

Java Threads in Light of occam/CSP (Tutorial)

By Peter H. Welch

Java provides support for parallel computing through a model that is built into the language itself. However, the designers of Java chose to be fairly conservative and settled for the contepts of threads and monitors. Monitors were developed by Tony Hoare in the early 1970s as a structued way of using semaphores to control access to shared resources. Hoare moved away from this, in the late 1970s, to develop the theory of Communicating Processes (CSP). One reason for this was that the semantics of monitors and threads are not WYSIWIG, so that designing robust parallel algorithms at this level is seriously hard. Fortunately, it is possible to introduce the CSP model into Java through sets of classes implemented on top of its monitor support. By restricting interaction between active Java objects to CSP synchronisation primitives, Jav thread semantics become compositional and systems with arbitrary levels of complexity become possible. Multi-threaded Web applets and distributed applications become simpler to design and implement, race hazards never occured, difficulties such as starvation, deadlock and livelock are easier to confront and overcome, and performance is no worse than that obtained from directly using the raw monitor primitives. The advantages of teaching parallelism in Java purely through the CSP class libraries will be discussed. (These libraries were developed jointly at Kent and Oxford Universities in the UK and the University of Twente in the Netherlands.)

Complete record...


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