Unexpected low CPU usage

Hi,

I have written an application server that exposes its services using
multiple RPC protocols: RMI, XML-RPC and SOAP. I have implemented a simple
ping service so I can determine the overhead of my framework and a
specific RPC protocol compared with bare RMI. I have a test client program
that invokes this service many times.

The weird thing is that when I run the test using the SOAP protocol
(implemented using XFire 1.2.6), the CPU is not fully used. I have no clue
where to look and/or what tools to use to diagnose the problem, because
most methods/tools measure/detect overuse instead of underuse. Has anybody
seen something similar?

Kind regards,

Johan Stuyts

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