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1085 | pj | 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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1123 | pj | 23 | CVS : $Id: edfact.h,v 1.2 2003-01-07 17:10:16 pj Exp $ |
1085 | pj | 24 | |
25 | File: $File$ |
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1123 | pj | 26 | Revision: $Revision: 1.2 $ |
27 | Last update: $Date: 2003-01-07 17:10:16 $ |
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1085 | pj | 28 | ------------ |
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 | |||
107 | |||
108 | |||
109 | |||
110 | |||
111 | |||
112 | |||
113 | |||
114 | /*+ flags... +*/ |
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115 | #define EDFACT_ENABLE_GUARANTEE 1 /*+ Task Guarantee enabled +*/ |
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116 | #define EDFACT_ENABLE_ALL 1 |
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117 | |||
118 | #define EDFACT_FAILED_GUARANTEE 8 /*+ used in the module, unsettabl |
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119 | in EDF_register_level... +*/ |
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120 | |||
121 | |||
122 | |||
123 | |||
124 | |||
125 | #define ELASTIC_HARD_PCLASS 0x0600 |
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126 | |||
127 | #define EDFACT_LEVELNAME "EDFACT base" |
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128 | #define EDFACT_LEVEL_CODE 166 |
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129 | #define EDFACT_LEVEL_VERSION 1 |
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130 | |||
131 | |||
132 | /*+ Registration function: |
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133 | int flags Options to be used in this level instance... |
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1123 | pj | 134 | |
135 | returns the level number at which the module has been registered. |
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1085 | pj | 136 | +*/ |
1123 | pj | 137 | LEVEL EDFACT_register_level(int flags); |
1085 | pj | 138 | |
139 | /*+ Returns the used bandwidth of a level +*/ |
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140 | bandwidth_t EDFACT_usedbandwidth(LEVEL l); |
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141 | |||
142 | /*+ returns respectively the number of dline, wcet or nact; -1 if error +*/ |
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143 | int EDFACT_get_dline_miss(PID p); |
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144 | int EDFACT_get_wcet_miss(PID p); |
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145 | int EDFACT_get_nact(PID p); |
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146 | |||
147 | /*+ resets respectively the number of dline, wcet miss; -1 if error +*/ |
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148 | int EDFACT_reset_dline_miss(PID p); |
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149 | int EDFACT_reset_wcet_miss(PID p); |
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150 | |||
151 | #endif |
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152 |