XM/eRTL is an embedded real-time system which comprises of XtratuM and PaRTiKle.XtratuM is a hypervisor and PaRTiKle is a new open source real-time kernel for embedded systems, especially the PaRTiKle is POSIX complied and support RTLinux/GPL applications, so the PaRTiKle is named eRTL in the XM/eRTL. XM/eRTL has the characteristics from XtratuM and PaRTiKle.