Hello Sebastian, First of all, sorry for the delay in the reply and for not being clear in my question. Currently, I am finalizing the implementation of two scheduling algorithms: CBS (Constant Bandwidth Server) and CSS (Capacity Sharing and Stealing). In fact, CBS is a refactoring proposal that IMO improves the current CBS RTEMS implementation. BTW: Soon I will submit the tickets and the respective patches.
In the course of the CSS implementation I was looking for a way to postpone job releases. For instance, assuming that a job with an inter-arrival time is released at time t, I wanted to delay its release for y instants, i.e., from t to t+y, without interfering with the minimum inter-arrival time of the task specified initially. In the meantime, to solve the issue, I decided to wait until the job unblocks and then perform the following steps in order to delay its release: _Thread_Set_state( the_thread, STATES_WAITING_FOR_PERIOD ); _Thread_Wait_flags_set( the_thread, THREAD_WAIT_STATE_BLOCKED ); _Thread_Add_timeout_ticks( the_thread, cpu_self, ticks ); This solves the problem since it blocks the job for a given time (using the functions _Thread_Set_state() and _Thread_Add_timeout_ticks()), thus performing the desired delay on the job arrival without modifying the inter-arrival time previously defined with the Rate Monotonic Manager. Is there an alternative way of achieving this goal? Regards, ________________________________ From: Sebastian Huber <sebastian.hu...@embedded-brains.de> Sent: Tuesday, April 9, 2019 6:45:25 AM To: Joel Oliveira Pinto; RTEMS Subject: Re: Task delay Hello Joel, On 08/04/2019 23:24, Joel Oliveira Pinto wrote: > > Hey, > > > I've been implementing a reservation-based scheduler in RTEMS and i've > been searching how to postpone a job release or even to delay a task > that is not the executing thread, and unfortunately, i'm having some > troubles finding the solution. Did someone already find out how to do > it or anyone as any clue ? > could you please describe a bit more what you want to achieve? -- Sebastian Huber, embedded brains GmbH Address : Dornierstr. 4, D-82178 Puchheim, Germany Phone : +49 89 189 47 41-16 Fax : +49 89 189 47 41-09 E-Mail : sebastian.hu...@embedded-brains.de PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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