Xmpi 2.2.3b6 - A graphical user interface for MPI program development.

XMPI is an X/Motif based graphical user interface for running, debugging and visualizing MPI programs. Extensive MPI information is extracted from a running application on demand, or from a cummulative log of communication. Both sources are tightly integrated with an application overview window and any number of single process focus windows. XMPI can acquire and display extensive detail on an application's MPI communication, including the following: o process synchronization status: running, system or blocked o message queue contents o source, destination, root ranks o MPI function name o communicator o datatype o message count o tag The above information is acquired from on-demand snapshots of application status using debugging hooks in the MPI implementation or from a trace log of communication activity. XMPI is a great tool for teaching MPI in a hands-on setting. Students run example code and can see and verify each MPI operation. XMPI has an application "wizard" to help assemble programs and assign processors to MIMD and SPMD applications. Furthermore, it is not tedious to generate, acquire and display information. A typical development cycle begins by assembling an application and continues in the following manner. o press the snapshot button to see what's going on now o popup focus windows for a few interesting processes o press the snapshot button a few (or a few dozen!) more times o see the application completed, hung, deadlocked, etc... o press the trace button once and the timeline window is displayed o review the previous execution with trace log snapshots o make application changes and press the rerun button No recompiles or special libraries are required to snapshot the application or obtain a trace log.

Authors: -------- LAM Team.