Opened on 12/13/10 at 00:07:17

Closed on 09/10/11 at 14:22:36

#1726 closed enhancement (wontfix)

EDF Scheduling Implementation

Reported by: Gedare Bloom Owned by: Joel Sherrill
Priority: normal Milestone: 4.11
Component: score Version: 4.11
Severity: minor Keywords:
Cc: Blocked By:
Blocking:

Description

This PR / feature request adds the EDF scheduling algorithm in RTEMS.

A couple of notes:

  • Requires the red-black tree (PR 1641)
  • Has not been extensively tested, I do provide some test cases though: + sptests/spsched03 -- ticker with EDF + sptests/spsched04 -- sp20 with EDF + sptests/spsched05 -- custom test
  • There are some lingering issues of which I'm aware: + spsched05 hangs/crashes after completing on psim + spsched05 crashes when the first non-periodic task kills itself on sis + spsched04 has an off-by-1 bug for the first set of released tasks
  • The current design encroaches on the rate monotonic manager. This is unavoidable until we resolve a more generic framework for handling periodic tasks in RTEMS.
  • There are some pointed FIXME and TODO areas remaining. The FIXMEs are related primarily to needing access to the global _Scheduler structure within the EDF ready queue functions -- this should be an easy fix, probably localized to scheduleredf.inl.

Attachments (2)

rtems-edf-1.diff​ (20.5 KB) - added by Gedare Bloom on 12/13/10 at 00:09:53.
EDF and RBTree patch
rtems-edf-1.tgz​ (43.6 KB) - added by Gedare Bloom on 12/13/10 at 00:10:33.
New files.

Download all attachments as: .zip

Change History (4)

Changed on 12/13/10 at 00:09:53 by Gedare Bloom

Attachment: rtems-edf-1.diff​ added

EDF and RBTree patch

Changed on 12/13/10 at 00:10:33 by Gedare Bloom

Attachment: rtems-edf-1.tgz​ added

New files.

comment:1 Changed on 09/10/11 at 14:22:36 by Gedare Bloom

dependson: → 1896
Resolution: → wontfix
Status: new → closed

Superseded by Petr's EDF implementation.

comment:2 Changed on 11/24/14 at 18:58:28 by Gedare Bloom

Version: HEAD → 4.11

Replace Version=HEAD with Version=4.11 for the tickets with Milestone >= 4.11

Note: See TracTickets for help on using tickets.