IdealGraphVisualizer file compatibility

Christian Thalinger christian.thalinger at
Wed Aug 3 07:51:06 PDT 2011

You want:  -XX:PrintIdealGraphLevel=1 -XX:PrintIdealGraphFile=output.xml

The README of the visualizer also helps:

-- Christian

On Aug 3, 2011, at 4:17 PM, Joe Kearney wrote:

> Hi,
> I've been trying to play with igv from
> but I don't know how to generate
> the required log files. What sort of files should I expect the igv to
> be able to read? The example files are graphDocument XMLs. I was
> hoping to be able to generate a file with something like the
> following:
> -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:LogFile=output.xml
> Needless to say, these hotspot_log files are totally different and the
> igv barfs with the below.
> java.lang.NullPointerException
> 	at
> 	at com.sun.hotspot.igv.coordinator.actions.ImportAction$
> 	at org.openide.util.RequestProcessor$
> [catch] at org.openide.util.RequestProcessor$
> How do I get the jvm to generate the right output file?
> Many thanks,
> Joe

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