Rev 1086 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1085 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
||
| 3 | * |
||
| 4 | * Coordinators: |
||
| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
||
| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
||
| 7 | * |
||
| 8 | * Authors : |
||
| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
||
| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
||
| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
||
| 12 | * (see the web pages for full authors list) |
||
| 13 | * |
||
| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
||
| 15 | * |
||
| 16 | * http://www.sssup.it |
||
| 17 | * http://retis.sssup.it |
||
| 18 | * http://shark.sssup.it |
||
| 19 | */ |
||
| 20 | |||
| 21 | /** |
||
| 22 | ------------ |
||
| 1123 | pj | 23 | CVS : $Id: edfact.h,v 1.2 2003-01-07 17:10:15 pj Exp $ |
| 1085 | pj | 24 | |
| 25 | File: $File$ |
||
| 1123 | pj | 26 | Revision: $Revision: 1.2 $ |
| 27 | Last update: $Date: 2003-01-07 17:10:15 $ |
||
| 1085 | pj | 28 | ------------ |
| 29 | |||
| 30 | This file contains the server EDFACT (EDF with pending activations) |
||
| 31 | |||
| 32 | Title: |
||
| 33 | EDFACT |
||
| 34 | |||
| 35 | Task Models Accepted: |
||
| 36 | HARD_TASK_MODEL - Hard Tasks (only Periodic) |
||
| 37 | wcet field and mit field must be != 0. They are used to set the wcet |
||
| 38 | and period of the tasks. |
||
| 39 | periodicity field can be only PERIODIC |
||
| 40 | drel field is ignored |
||
| 41 | |||
| 42 | Guest Models Accepted: |
||
| 43 | JOB_TASK_MODEL - a single guest task activation |
||
| 44 | Identified by an absolute deadline and a period. |
||
| 45 | period field is ignored |
||
| 46 | |||
| 47 | Description: |
||
| 48 | This module schedule his tasks following the classic EDF scheme. |
||
| 49 | The task guarantee is based on the factor utilization approach. |
||
| 50 | The tasks scheduled are only periodic. |
||
| 51 | All the task are put in a queue and the scheduling is based on the |
||
| 52 | deadline value. |
||
| 53 | NO GUARANTEE is performed on guest tasks. The guarantee must be performed |
||
| 54 | by the level that inserts guest tasks in the EDF level. |
||
| 55 | If a task miss a deadline a counter is incremented. |
||
| 56 | If a task exausts the wcet a counter is incremented |
||
| 57 | No ZOMBIE support!!!!!! |
||
| 58 | |||
| 59 | Exceptions raised: |
||
| 60 | XUNVALID_GUEST XUNVALID_TASK |
||
| 61 | some primitives are not implemented: |
||
| 62 | task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay |
||
| 63 | |||
| 64 | XACTIVATION |
||
| 65 | If a task is actiated through task_activate or guest_activate more than |
||
| 66 | one time |
||
| 67 | |||
| 68 | Restrictions & special features: |
||
| 69 | - This level doesn't manage the main task. |
||
| 70 | - At init time we have to specify: |
||
| 71 | . guarantee check |
||
| 72 | (when all task are created the system will check that the task_set |
||
| 73 | will not use more than the available bandwidth) |
||
| 74 | - A function to return the used bandwidth of the level is provided. |
||
| 75 | - Functions to return and reset the nact, wcet and dline miss counters |
||
| 76 | |||
| 77 | **/ |
||
| 78 | |||
| 79 | /* |
||
| 80 | * Copyright (C) 2001 Paolo Gai |
||
| 81 | * |
||
| 82 | * This program is free software; you can redistribute it and/or modify |
||
| 83 | * it under the terms of the GNU General Public License as published by |
||
| 84 | * the Free Software Foundation; either version 2 of the License, or |
||
| 85 | * (at your option) any later version. |
||
| 86 | * |
||
| 87 | * This program is distributed in the hope that it will be useful, |
||
| 88 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 89 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 90 | * GNU General Public License for more details. |
||
| 91 | * |
||
| 92 | * You should have received a copy of the GNU General Public License |
||
| 93 | * along with this program; if not, write to the Free Software |
||
| 94 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 95 | * |
||
| 96 | */ |
||
| 97 | |||
| 98 | |||
| 99 | #ifndef __EDFACT_H__ |
||
| 100 | #define __EDFACT_H__ |
||
| 101 | |||
| 102 | #include <ll/ll.h> |
||
| 103 | #include <kernel/config.h> |
||
| 104 | #include <sys/types.h> |
||
| 105 | #include <kernel/types.h> |
||
| 106 | |||
| 107 | |||
| 108 | |||
| 109 | |||
| 110 | |||
| 111 | |||
| 112 | |||
| 113 | |||
| 114 | /*+ flags... +*/ |
||
| 115 | #define EDFACT_ENABLE_GUARANTEE 1 /*+ Task Guarantee enabled +*/ |
||
| 116 | #define EDFACT_ENABLE_ALL 1 |
||
| 117 | |||
| 118 | #define EDFACT_FAILED_GUARANTEE 8 /*+ used in the module, unsettabl |
||
| 119 | in EDF_register_level... +*/ |
||
| 120 | |||
| 121 | |||
| 122 | |||
| 123 | |||
| 124 | |||
| 125 | #define ELASTIC_HARD_PCLASS 0x0600 |
||
| 126 | |||
| 127 | #define EDFACT_LEVELNAME "EDFACT base" |
||
| 128 | #define EDFACT_LEVEL_CODE 166 |
||
| 129 | #define EDFACT_LEVEL_VERSION 1 |
||
| 130 | |||
| 131 | |||
| 132 | /*+ Registration function: |
||
| 133 | int flags Options to be used in this level instance... |
||
| 1123 | pj | 134 | |
| 135 | returns the level number at which the module has been registered. |
||
| 1085 | pj | 136 | +*/ |
| 1123 | pj | 137 | LEVEL EDFACT_register_level(int flags); |
| 1085 | pj | 138 | |
| 139 | /*+ Returns the used bandwidth of a level +*/ |
||
| 140 | bandwidth_t EDFACT_usedbandwidth(LEVEL l); |
||
| 141 | |||
| 142 | /*+ returns respectively the number of dline, wcet or nact; -1 if error +*/ |
||
| 143 | int EDFACT_get_dline_miss(PID p); |
||
| 144 | int EDFACT_get_wcet_miss(PID p); |
||
| 145 | int EDFACT_get_nact(PID p); |
||
| 146 | |||
| 147 | /*+ resets respectively the number of dline, wcet miss; -1 if error +*/ |
||
| 148 | int EDFACT_reset_dline_miss(PID p); |
||
| 149 | int EDFACT_reset_wcet_miss(PID p); |
||
| 150 | |||
| 151 | #endif |
||
| 152 |