Dynamic Parallel Execution Profiles

This is a Java demo -- if your browser doesn't support Java you won't see anything!

This demo doesn't work on a mono screen! Click to stop/start the demo. Clicking on Restart starts it from the beginning again.

This demo is under construction!

About the Demo

Basically this demo shows a simple program (a parallel version of Date's bill of materials problem) running on a closely-coupled parallel machine with 32 processors.

The display shows 32 processors each of which has zero or more coloured lines, representing tasks of a certain type

green for tasks that are running;
yellow for tasks that could be run, but aren't because the processor is already busy;
red for tasks that are waiting for data from other tasks;
cyan for tasks that are fetching data [some simulation models only];
blue for tasks that are migrating to other processors [also only on some simulations]).

The height of each line shows the number of tasks of each type that are present on a processor.

Processors are also coloured according to the most prominent activity that processor is engaged. Black means the processor has no tasks of any kind.

The number on the top left of the demo is the current simulated time; the remainder of this line gives details about the program and when it was originally profiled.