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The JavaPorts Visual Task Composer (JPVTC)

The JPVTC is a graphical tool that is used in conjunction with the existing JPVAC tool to construct a hierarchical two-level structural and behavioral application model that is used to facilitate performance engineering and rapid prototyping of network computing JP applications. JPVAC is used to represent the structure of a JavaPorts application, which consists of a set of concurrent and possibly interacting tasks, as an Application Task Graph (ATG) abstraction. The ATG is considered as the first (top) level in the two-level hierarchical application representation. JPVTC is used to graphically construct behavioral models for each of the tasks that form the application. The behavioral graphs of tasks are considered as the second (lower) level in the two-level hierarchical application representation.

The JPVTC has the following features:

• The ability to construct an acyclic graph that models the behavior of a JP application task. The behavioral graph consists of nodes representing basic code constructs and of edges representing dependencies between them.
• Allows modeling conditionals, loops, asynchronous read loops, loops that contain message passing operations with ports and keys dependent on the loop index (i.e. dynamic ports and keys), code blocks, threads, and dynamic message passing operations.
• Prevents cycles in the constructed graphs using an on-the-fly cycle detection algorithm.
• Checks the graph's syntax and connectivity.
• Links the behavioral graphs to their corresponding application tasks. 
• Annotates some of the graph elements with attributes and benchmark performance data as needed to estimate the performance of the application.
• Allows performing what-if performance analysis of parallel programs. 
• Saves the graphs in XML format to facilitate interchanging them easily over the internet. 
• Generates Java and/or Matlab code skeletons for the task graphs. 
• Portable since it is implemented using the Java programming language.
• Allows working with multiple graphs in separate windows.

Related Documents

[1] Feras Al-Hawari. Help: JavaPorts Visual Task Composer (JPVTC). ECE Dept., Northeastern Univerty, 2010. (PDF)

[2] Feras Al-Hawari. Tutorial: Constructing network application models using JavaPorts tools. ECE Dept., Northeastern Univerty, 2010. (PDF)