jboss-4.0.5.GA just support one cpu only?

Version 1

    There is an 8 cpu server runs a jboss-4.0.5.GA instance, just deployed a web application. whenever how busy does the jboss servers, there is only one cpu usage up and down. even if it till to 100%, the others cpu still keeps low usage.

     

    How and why?

    Is it jboss-4.0.5.GA does not support multiple cpu? or I do not configure it correctly?

    tks alot