ExecStreamGraphVisualization

From Eigenpedia

The ExecStreamGraph class provides method renderGraphviz which dumps a .dot representation of the graph to an ostream. You can get this to happen automatically for every graph scheduled by setting trace net.sf.fennel.xo.scheduler.level=FINE (see FennelTracing or FarragoTracing depending on how you're executing the graph). The .dot file will be written to $FENNEL_HOME/trace/ExecStreamGraph.dot.

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Once you have a .dot file, you need to install Graphviz to view it. On Debian-based systems, apt-get install graphviz. You can use the dotty utility to view and edit a graph, e.g.

dotty ExecStreamGraph.dot

You should see something like this:

The graph is rendered in the traditional iterator orientation, with source "leaves" at the bottom and sink at the top. The edge arrow orientations indicate the direction of dataflow.

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dotty is a fairly clunky old X Windows program. To get a nicer read-only rendering of the graph, use the dot utility, e.g.

dot -Tpng ExecStreamGraph.dot > ExecStreamGraph.png

Or, install ImageMagick first (e.g. apt-get install imagemagick) and pipe dot's output into the display utility to get it onto your screen directly:

dot -Tpng ExecStreamGraph.dot | display

to get something like