patbalbe@disca.upv.es

P. Balbastre 2002-11-06 make_linux_task_cbs_server 3rtl make_linux_task_cbs_server Change linux task parameters to execute it with CBS scheduling policy. #include <rtl_sched.h> extern void make_linux_task_cbs_server hrtime_t start hrtime_t initbudget hrtime_t deadline hrtime_t period int priority make_linux_task_cbs_server Change linux task parameters to execute it with SCHED_CBS_NP scheduling policy. SCHED_CBS_NP scheduling policy efficiently handle soft real-time requests with a variable or unknown execution behaviour under SCHED_EDF_NP scheduling policy. To avoid unpredictable delays on hard real-time tasks, soft tasks are isolated through a bandwidth reservation mechanism, according to wich each soft task is assigned a deadline, computed as a function of the reserved bandwidth and its actual requests. If a thread requires to execute more than its expected computation time, its deadline is postponed so that its reserved bandwidth is not exceeded. This function allows linux task to serve aperiodic events. This way, when an aperiodic event arrives, the linux task "inherits" the properties of the CBS thread by means of the make_linux_task_cbs_server function. SCHED_EDF_NP is a scheduling policy that combines both static and dynamic priority scheduling. Threads are ordered by priority, and among the same static priority threads with closer deadline first. Each thread has two scheduling attributes: priority and deadline. It is a Rate Monotonic policy and an EDF policy at each priority level. No value returned. Parameter checking is not performed. Incorrect parameters may result in random errors. Patricia Balbastre <patricia@disca.upv.es> Pau Mendoza <pabmench@disca.upv.es> pthread_setinitbudget_np(3rtl). pthread_attr_setinitbudget_np(3rtl). pthread_initcbs_np(3rtl).