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| 1659 | giacomo | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | ------------ |
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| 23 | CVS : $Id: EDFACT.H,v 1.1 2004-06-04 10:48:28 giacomo Exp $ |
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| 24 | |||
| 25 | File: $File$ |
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| 26 | Revision: $Revision: 1.1 $ |
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| 27 | Last update: $Date: 2004-06-04 10:48:28 $ |
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| 28 | ------------ |
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| 29 | |||
| 30 | This file contains the server EDFACT (EDF with pending activations) |
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| 31 | |||
| 32 | Title: |
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| 33 | EDFACT |
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| 34 | |||
| 35 | Task Models Accepted: |
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| 36 | HARD_TASK_MODEL - Hard Tasks (only Periodic) |
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| 37 | wcet field and mit field must be != 0. They are used to set the wcet |
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| 38 | and period of the tasks. |
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| 39 | periodicity field can be only PERIODIC |
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| 40 | drel field is ignored |
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| 41 | |||
| 42 | Guest Models Accepted: |
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| 43 | JOB_TASK_MODEL - a single guest task activation |
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| 44 | Identified by an absolute deadline and a period. |
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| 45 | period field is ignored |
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| 46 | |||
| 47 | Description: |
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| 48 | This module schedule his tasks following the classic EDF scheme. |
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| 49 | The task guarantee is based on the factor utilization approach. |
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| 50 | The tasks scheduled are only periodic. |
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| 51 | All the task are put in a queue and the scheduling is based on the |
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| 52 | deadline value. |
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| 53 | NO GUARANTEE is performed on guest tasks. The guarantee must be performed |
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| 54 | by the level that inserts guest tasks in the EDF level. |
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| 55 | If a task miss a deadline a counter is incremented. |
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| 56 | If a task exausts the wcet a counter is incremented |
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| 57 | No ZOMBIE support!!!!!! |
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| 58 | |||
| 59 | Exceptions raised: |
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| 60 | XUNVALID_GUEST XUNVALID_TASK |
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| 61 | some primitives are not implemented: |
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| 62 | task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay |
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| 63 | |||
| 64 | XACTIVATION |
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| 65 | If a task is actiated through task_activate or guest_activate more than |
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| 66 | one time |
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| 67 | |||
| 68 | Restrictions & special features: |
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| 69 | - This level doesn't manage the main task. |
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| 70 | - At init time we have to specify: |
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| 71 | . guarantee check |
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| 72 | (when all task are created the system will check that the task_set |
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| 73 | will not use more than the available bandwidth) |
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| 74 | - A function to return the used bandwidth of the level is provided. |
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| 75 | - Functions to return and reset the nact, wcet and dline miss counters |
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| 76 | |||
| 77 | **/ |
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| 78 | |||
| 79 | /* |
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| 80 | * Copyright (C) 2001 Paolo Gai |
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| 81 | * |
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| 82 | * This program is free software; you can redistribute it and/or modify |
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| 83 | * it under the terms of the GNU General Public License as published by |
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| 84 | * the Free Software Foundation; either version 2 of the License, or |
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| 85 | * (at your option) any later version. |
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| 86 | * |
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| 87 | * This program is distributed in the hope that it will be useful, |
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| 88 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 89 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 90 | * GNU General Public License for more details. |
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| 91 | * |
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| 92 | * You should have received a copy of the GNU General Public License |
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| 93 | * along with this program; if not, write to the Free Software |
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| 94 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 95 | * |
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| 96 | */ |
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| 97 | |||
| 98 | |||
| 99 | #ifndef __EDFACT_H__ |
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| 100 | #define __EDFACT_H__ |
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| 101 | |||
| 102 | #include <ll/ll.h> |
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| 103 | #include <kernel/config.h> |
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| 104 | #include <sys/types.h> |
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| 105 | #include <kernel/types.h> |
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| 106 | #include <modules/codes.h> |
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| 107 | |||
| 108 | |||
| 109 | |||
| 110 | |||
| 111 | |||
| 112 | |||
| 113 | |||
| 114 | |||
| 115 | /*+ flags... +*/ |
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| 116 | #define EDFACT_ENABLE_GUARANTEE 1 /*+ Task Guarantee enabled +*/ |
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| 117 | #define EDFACT_ENABLE_ALL 1 |
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| 118 | |||
| 119 | #define EDFACT_FAILED_GUARANTEE 8 /*+ used in the module, unsettabl |
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| 120 | in EDF_register_level... +*/ |
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| 121 | |||
| 122 | |||
| 123 | |||
| 124 | |||
| 125 | |||
| 126 | #define ELASTIC_HARD_PCLASS 0x0600 |
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| 127 | |||
| 128 | #define EDFACT_LEVELNAME "EDFACT base" |
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| 129 | #define EDFACT_LEVEL_CODE 166 |
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| 130 | #define EDFACT_LEVEL_VERSION 1 |
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| 131 | |||
| 132 | |||
| 133 | /*+ Registration function: |
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| 134 | int flags Options to be used in this level instance... |
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| 135 | +*/ |
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| 136 | void EDFACT_register_level(int flags); |
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| 137 | |||
| 138 | /*+ Returns the used bandwidth of a level +*/ |
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| 139 | bandwidth_t EDFACT_usedbandwidth(LEVEL l); |
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| 140 | |||
| 141 | /*+ returns respectively the number of dline, wcet or nact; -1 if error +*/ |
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| 142 | int EDFACT_get_dline_miss(PID p); |
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| 143 | int EDFACT_get_wcet_miss(PID p); |
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| 144 | int EDFACT_get_nact(PID p); |
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| 145 | |||
| 146 | /*+ resets respectively the number of dline, wcet miss; -1 if error +*/ |
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| 147 | int EDFACT_reset_dline_miss(PID p); |
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| 148 | int EDFACT_reset_wcet_miss(PID p); |
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| 149 | |||
| 150 | /*+ modify the dedadlines on runtime +*/ |
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| 151 | void EDFACT_modify_dline(PID p, TIME period, int wcet); |
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| 152 | #endif |
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| 153 |