The demo shown at the Freescale booth at Embedded World boots Mentor Embedded Linux on the A9 core. The Linux system runs a Qt based patient monitoring application. When the start button is pressed on the Qt application, remoteproc interfaces are used to power up the M4 core and launch the Nucleus RTOS firmware responsible for capturing patient data, then rpmsg interfaces are used to establish a VirtIO based communication mechanism between the applications across the mixed core and operating system architecture. Pressing the stop button on the Qt application the reverse happens, ending in a powered off M4 core.
The entire runtime software architecture is instrumented and the trace data is visualized in Sourcery Analyzer for simultaneous timeline performance analysis and debug of both operating systems and applications.
You can read more about the Freescale iMX6 SoloX here: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX6SX