Blame |
Last modification |
View Log
| RSS feed
/*
* Project: S.Ha.R.K.
*
* Coordinators:
* Giorgio Buttazzo <giorgio@sssup.it>
* Paolo Gai <pj@gandalf.sssup.it>
*
* Authors :
* Paolo Gai <pj@gandalf.sssup.it>
* Massimiliano Giorgi <massy@gandalf.sssup.it>
* Luca Abeni <luca@gandalf.sssup.it>
* (see the web pages for full authors list)
*
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
*
* http://www.sssup.it
* http://retis.sssup.it
* http://shark.sssup.it
*/
/**
------------
CVS : $Id: edfstar.h,v 1.1 2004-06-01 11:42:43 giacomo Exp $
File: $File$
Revision: $Revision: 1.1 $
Last update: $Date: 2004-06-01 11:42:43 $
------------
Title:
EDFSTAR
Task Models Accepted:
HARD_TASK_MODEL - Hard Tasks (only Periodic)
wcet field and mit field must be != 0. They are used to set the wcet
and period of the tasks.
periodicity field can be only PERIODIC
drel field is ignored
Guest Models Accepted:
JOB_TASK_MODEL - a single guest task activation
Identified by an absolute deadline and a period.
period field is ignored
Description:
This module schedule his tasks following the classic EDF
scheme. This module is derived from the EDFACT Scheduling Module.
This module can not stay alone: when it have to schedule a task, it
simply inserts it into another master module using a
BUDGET_TASK_MODEL.
No Task guarantee is performed at all.
The tasks scheduled are only periodic.
All the task are put in a queue and the scheduling is based on the
deadline value.
If a task miss a deadline a counter is incremented.
If a task exausts the wcet a counter is incremented
No ZOMBIE support!!!!!!
Exceptions raised:
XUNVALID_GUEST XUNVALID_TASK
some primitives are not implemented:
task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay
XACTIVATION
If a task is actiated through task_activate or guest_activate more than
one time
Restrictions & special features:
- This level doesn't manage the main task.
- Functions to return and reset the nact, wcet and dline miss
counters are provided
**/
/*
* Copyright (C) 2001 Paolo Gai
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __EDFSTAR_H__
#define __EDFSTAR_H__
#include <ll/ll.h>
#include <kernel/config.h>
#include <sys/types.h>
#include <kernel/types.h>
/* flags... */
#define EDFSTAR_ENABLE_GUARANTEE 1 /* Task Guarantee enabled */
#define EDFSTAR_ENABLE_ALL 1
#define EDFSTAR_FAILED_GUARANTEE 8 /* used in the module, unsettabl
in EDF_register_level... */
#define EDFSTAR_LEVELNAME "EDFSTAR base"
#define EDFSTAR_LEVEL_CODE 166
#define EDFSTAR_LEVEL_VERSION 1
/* Registration function:
int budget The budget used by this module (see CBSSTAR.h)
int master The master module used by EDFSTAR
*/
LEVEL EDFSTAR_register_level(int budget, int master);
/* returns respectively the number of dline, wcet or nact; -1 if error */
int EDFSTAR_get_dline_miss(PID p);
int EDFSTAR_get_wcet_miss(PID p);
int EDFSTAR_get_nact(PID p);
/* resets respectively the number of dline, wcet miss; -1 if error */
int EDFSTAR_reset_dline_miss(PID p);
int EDFSTAR_reset_wcet_miss(PID p);
#endif