Starting tornado with preforking (multiple threads, one port)

gistfile1.py

def main(): # pragma: no cover
    tornado.options.parse_command_line()
    if options.showurls:
        for path, class_ in route.get_routes():
            print path
        return

    http_server = tornado.httpserver.HTTPServer(Application())
    print "Starting tornado on port", options.port
    if options.prefork:
        print "\tpre-forking"
        http_server.bind(options.port)
        http_server.start()
    else:
        http_server.listen(options.port)

    try:
        tornado.ioloop.IOLoop.instance().start()
    except KeyboardInterrupt:
        pass