Emiliano Giovannetti SSSA giovannetti@gandalf.sssup.it Giuseppe Lipari SSSA lipari@sssup.it 2003 OCERA Consortium Linux High Resolution Timers Real-Time, RTLinux API, Linux This component is a library of functions for threads in user space that tries to replicate, as much as it is possible the RTLinux API. The objective of this component is to let an user to test a real-time application in user space. The motivation is that Linux user space is a much more controlled environment, where each application has its own memory space and faulty application cannot harm the functionality of the entire system. Also, in user space it is possible to specify access permissions for each user, so that a common user cannot access critical services and compromise the functionality of the system.