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221 | 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 | * (see the web pages for full authors list) |
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11 | * |
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12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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13 | * |
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14 | * http://www.sssup.it |
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15 | * http://retis.sssup.it |
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16 | * http://shark.sssup.it |
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17 | */ |
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18 | |||
19 | /* |
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20 | * Copyright (C) 2001 Paolo Gai |
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21 | * |
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22 | * This program is free software; you can redistribute it and/or modify |
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23 | * it under the terms of the GNU General Public License as published by |
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24 | * the Free Software Foundation; either version 2 of the License, or |
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25 | * (at your option) any later version. |
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26 | * |
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27 | * This program is distributed in the hope that it will be useful, |
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28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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30 | * GNU General Public License for more details. |
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31 | * |
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32 | * You should have received a copy of the GNU General Public License |
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33 | * along with this program; if not, write to the Free Software |
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34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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35 | * |
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36 | */ |
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37 | |||
38 | #include "edfstar.h" |
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39 | #include <ll/stdio.h> |
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40 | #include <ll/string.h> |
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41 | #include <kernel/model.h> |
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42 | #include <kernel/descr.h> |
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43 | #include <kernel/var.h> |
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44 | #include <kernel/func.h> |
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45 | |||
783 | giacomo | 46 | #include <tracer.h> |
221 | giacomo | 47 | |
48 | #define EDFSTAR_CHANGE_LEVEL 1 |
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49 | |||
50 | /* for iqueues */ |
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51 | /* #include "iqueue.h" Now iqueues are the only queue type available |
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52 | into the kernel */ |
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53 | #include <kernel/iqueue.h> |
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54 | |||
55 | /* for BUDGET_TASK_MODEL */ |
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867 | trimarchi | 56 | #include "fsf_configuration_parameters.h" |
57 | #include "fsf_core.h" |
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241 | giacomo | 58 | #include "fsf_server.h" |
876 | trimarchi | 59 | #include <modules/comm_message.h> |
221 | giacomo | 60 | |
876 | trimarchi | 61 | |
221 | giacomo | 62 | /* |
63 | * DEBUG stuffs begin |
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64 | */ |
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65 | |||
224 | giacomo | 66 | //#define EDFSTAR_DEBUG |
221 | giacomo | 67 | |
68 | #ifdef EDFSTAR_DEBUG |
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69 | |||
70 | static __inline__ fake_printf(char *fmt, ...) {} |
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71 | |||
72 | //#define edfstar_printf fake_printf |
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73 | //#define edfstar_printf2 fake_printf |
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74 | //#define edfstar_printf3 fake_printf |
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75 | |||
76 | #define edfstar_printf kern_printf |
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77 | #define edfstar_printf2 kern_printf |
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78 | #define edfstar_printf3 kern_printf |
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79 | #endif |
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80 | |||
81 | /* |
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82 | * DEBUG stuffs end |
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83 | */ |
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84 | |||
85 | /* Status used in the level */ |
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86 | #define EDFSTAR_READY MODULE_STATUS_BASE /* - Ready status */ |
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87 | #define EDFSTAR_IDLE MODULE_STATUS_BASE+4 /* to wait the deadline */ |
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88 | |||
89 | /* flags */ |
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792 | trimarchi | 90 | #define EDFSTAR_FLAG_NOPREEMPT 4 |
221 | giacomo | 91 | #define EDFSTAR_FLAG_NORAISEEXC 2 |
348 | trimarchi | 92 | #define EDFSTAR_FLAG_SPORADIC 1 |
221 | giacomo | 93 | |
348 | trimarchi | 94 | |
221 | giacomo | 95 | /* the level redefinition for the Earliest Deadline First level */ |
96 | typedef struct { |
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97 | level_des l; /* the standard level descriptor */ |
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98 | |||
99 | TIME period[MAX_PROC]; /* The task periods; the deadlines are |
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100 | stored in the priority field */ |
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101 | int deadline_timer[MAX_PROC]; |
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102 | /* The task deadline timers */ |
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103 | |||
104 | struct timespec deadline_timespec[MAX_PROC]; |
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105 | |||
106 | int dline_miss[MAX_PROC]; /* Deadline miss counter */ |
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107 | int wcet_miss[MAX_PROC]; /* Wcet miss counter */ |
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108 | |||
109 | int nact[MAX_PROC]; /* Wcet miss counter */ |
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110 | |||
111 | int flag[MAX_PROC]; |
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112 | /* used to manage the JOB_TASK_MODEL and the |
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113 | periodicity */ |
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114 | |||
115 | IQUEUE ready; /* the ready queue */ |
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116 | |||
117 | PID activated; /* the task that has been inserted into the |
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118 | master module */ |
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119 | |||
120 | int budget[MAX_PROC]; |
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121 | |||
122 | int scheduling_level; |
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123 | |||
296 | trimarchi | 124 | int cap_lev; |
125 | struct timespec cap_lasttime; |
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126 | |||
876 | trimarchi | 127 | int new_level[MAX_PROC]; |
128 | int wcet[MAX_PROC]; /* save the wcet fields */ |
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129 | |||
296 | trimarchi | 130 | |
221 | giacomo | 131 | } EDFSTAR_level_des; |
132 | |||
296 | trimarchi | 133 | static void capacity_handler(void *l) |
134 | { |
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135 | EDFSTAR_level_des *lev = l; |
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136 | lev->cap_lev = NIL; |
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137 | event_need_reschedule(); |
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138 | } |
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139 | |||
221 | giacomo | 140 | static void EDFSTAR_check_preemption(EDFSTAR_level_des *lev) |
141 | { |
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142 | PID first; |
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143 | |||
351 | giacomo | 144 | #ifdef EDFSTAR_DEBUG |
145 | edfstar_printf("(E:chk)"); |
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146 | #endif |
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792 | trimarchi | 147 | /* check if the task is preempteble or not */ |
821 | trimarchi | 148 | if (lev->activated != NIL && lev->flag[lev->activated] & EDFSTAR_FLAG_NOPREEMPT) return; |
221 | giacomo | 149 | |
150 | if ((first = iq_query_first(&lev->ready)) != lev->activated) { |
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151 | if (lev->activated != NIL) |
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152 | level_table[ lev->scheduling_level ]-> |
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153 | private_extract(lev->scheduling_level, lev->activated); |
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154 | |||
155 | lev->activated = first; |
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156 | |||
157 | if (first != NIL) { |
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158 | BUDGET_TASK_MODEL b; |
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159 | budget_task_default_model(b, lev->budget[first]); |
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160 | |||
161 | level_table[ lev->scheduling_level ]-> |
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162 | private_insert(lev->scheduling_level, first, (TASK_MODEL *)&b); |
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163 | } |
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164 | } |
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165 | } |
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166 | |||
167 | static void EDFSTAR_timer_deadline(void *par); |
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168 | |||
169 | static void EDFSTAR_internal_activate(EDFSTAR_level_des *lev, PID p, |
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170 | struct timespec *t) |
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171 | { |
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172 | |||
351 | giacomo | 173 | #ifdef EDFSTAR_DEBUG |
174 | edfstar_printf("(E:iact)"); |
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175 | #endif |
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176 | |||
221 | giacomo | 177 | ADDUSEC2TIMESPEC(lev->period[p], t); |
178 | |||
179 | *iq_query_timespec(p, &lev->ready) = *t; |
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180 | lev->deadline_timespec[p] = *t; |
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181 | |||
182 | /* Insert task in the correct position */ |
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183 | proc_table[p].status = EDFSTAR_READY; |
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184 | iq_timespec_insert(p,&lev->ready); |
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296 | trimarchi | 185 | proc_table[p].control &= ~CONTROL_CAP; |
221 | giacomo | 186 | |
187 | /* check for preemption */ |
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188 | EDFSTAR_check_preemption(lev); |
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189 | } |
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190 | |||
191 | static void EDFSTAR_timer_deadline(void *par) |
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192 | { |
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193 | PID p = (PID) par; |
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194 | EDFSTAR_level_des *lev; |
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195 | |||
196 | lev = (EDFSTAR_level_des *)level_table[proc_table[p].task_level]; |
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799 | giacomo | 197 | lev->deadline_timer[p] = NIL; |
221 | giacomo | 198 | |
199 | switch (proc_table[p].status) { |
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200 | case EDFSTAR_IDLE: |
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201 | /* set the request time */ |
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350 | giacomo | 202 | if (!(lev->flag[p] & EDFSTAR_FLAG_SPORADIC)) |
203 | EDFSTAR_internal_activate(lev,p,iq_query_timespec(p, &lev->ready)); |
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221 | giacomo | 204 | |
205 | event_need_reschedule(); |
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206 | break; |
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207 | |||
208 | default: |
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351 | giacomo | 209 | #ifdef EDFSTAR_DEBUG |
210 | kern_printf("(E:Dl:%d)",p); |
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211 | #endif |
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221 | giacomo | 212 | /* else, a deadline miss occurred!!! */ |
213 | lev->dline_miss[p]++; |
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783 | giacomo | 214 | TRACER_LOGEVENT(FTrace_EVT_task_deadline_miss,proc_table[p].context,proc_table[p].task_level); |
221 | giacomo | 215 | |
216 | /* the task is into another state */ |
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351 | giacomo | 217 | if (!(lev->flag[p] & EDFSTAR_FLAG_SPORADIC)) { |
218 | lev->nact[p]++; |
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219 | ADDUSEC2TIMESPEC(lev->period[p], &lev->deadline_timespec[p]); |
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220 | } |
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221 | giacomo | 221 | } |
222 | |||
223 | /* Set the deadline timer */ |
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350 | giacomo | 224 | if (!(lev->flag[p] & EDFSTAR_FLAG_SPORADIC)) |
225 | lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p], |
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226 | EDFSTAR_timer_deadline, |
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227 | (void *)p); |
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221 | giacomo | 228 | |
229 | } |
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230 | |||
876 | trimarchi | 231 | static int EDFSTAR_private_change_level(LEVEL l, PID p) |
232 | { |
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233 | |||
234 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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235 | |||
236 | /* Change task level */ |
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237 | if (lev->flag[p] & EDFSTAR_CHANGE_LEVEL) { |
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238 | |||
239 | STD_command_message msg; |
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240 | |||
241 | proc_table[p].status = SLEEP; |
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242 | |||
243 | level_table[lev->scheduling_level]->private_extract(lev->scheduling_level,p); |
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244 | iq_extract(p,&lev->ready); |
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245 | |||
246 | if (lev->deadline_timer[p] != -1) |
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247 | kern_event_delete(lev->deadline_timer[p]); |
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248 | |||
249 | EDFSTAR_check_preemption(lev); |
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250 | |||
251 | lev->nact[p] = 0; |
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252 | lev->budget[p] = -1; |
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253 | proc_table[p].task_level = lev->new_level[p]; |
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254 | |||
255 | /* Send change level command to local scheduler */ |
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256 | |||
257 | msg.command = STD_ACTIVATE_TASK; |
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258 | msg.param = NULL; |
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259 | |||
260 | level_table[ lev->new_level[p] ]->public_message(lev->new_level[p],p,&msg); |
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261 | |||
262 | return 1; |
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263 | |||
264 | } |
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265 | |||
266 | return 0; |
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267 | |||
268 | } |
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269 | |||
270 | |||
221 | giacomo | 271 | static void EDFSTAR_timer_guest_deadline(void *par) |
272 | { |
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273 | PID p = (PID) par; |
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274 | |||
351 | giacomo | 275 | #ifdef EDFSTAR_DEBUG |
276 | edfstar_printf("(E:gdl)"); |
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277 | #endif |
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221 | giacomo | 278 | |
279 | kern_raise(XDEADLINE_MISS,p); |
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280 | } |
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281 | |||
282 | static int EDFSTAR_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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283 | { |
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284 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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285 | |||
286 | /* if the EDFSTAR_task_create is called, then the pclass must be a |
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287 | valid pclass. */ |
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288 | HARD_TASK_MODEL *h; |
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289 | |||
290 | if (m->pclass != HARD_PCLASS) return -1; |
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291 | if (m->level != 0 && m->level != l) return -1; |
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292 | h = (HARD_TASK_MODEL *)m; |
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351 | giacomo | 293 | if (!h->wcet || !h->mit) return -1; |
221 | giacomo | 294 | /* now we know that m is a valid model */ |
295 | |||
351 | giacomo | 296 | #ifdef EDFSTAR_DEBUG |
297 | edfstar_printf("(E:Crt)"); |
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298 | #endif |
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221 | giacomo | 299 | |
300 | lev->period[p] = h->mit; |
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301 | |||
302 | lev->flag[p] = 0; |
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348 | trimarchi | 303 | |
304 | if (h->periodicity == APERIODIC) |
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305 | lev->flag[p] |= EDFSTAR_FLAG_SPORADIC; |
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306 | |||
221 | giacomo | 307 | lev->deadline_timer[p] = -1; |
308 | lev->dline_miss[p] = 0; |
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309 | lev->wcet_miss[p] = 0; |
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310 | lev->nact[p] = 0; |
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311 | |||
312 | /* Enable wcet check */ |
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313 | proc_table[p].avail_time = h->wcet; |
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314 | proc_table[p].wcet = h->wcet; |
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315 | |||
316 | return 0; /* OK, also if the task cannot be guaranteed... */ |
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317 | } |
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318 | |||
296 | trimarchi | 319 | |
320 | static void EDFSTAR_account_capacity(EDFSTAR_level_des *lev, PID p) |
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321 | { |
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322 | struct timespec ty; |
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323 | TIME tx; |
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324 | |||
325 | SUBTIMESPEC(&schedule_time, &lev->cap_lasttime, &ty); |
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326 | tx = TIMESPEC2USEC(&ty); |
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327 | |||
328 | proc_table[p].avail_time -= tx; |
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351 | giacomo | 329 | } |
296 | trimarchi | 330 | |
221 | giacomo | 331 | static int EDFSTAR_public_eligible(LEVEL l, PID p) |
332 | { |
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333 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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334 | |||
351 | giacomo | 335 | #ifdef EDFSTAR_DEBUG |
336 | edfstar_printf2("(E:eli)"); |
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337 | #endif |
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221 | giacomo | 338 | |
339 | return level_table[ lev->scheduling_level ]-> |
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340 | private_eligible(lev->scheduling_level,p); |
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351 | giacomo | 341 | |
221 | giacomo | 342 | } |
343 | |||
344 | static void EDFSTAR_public_dispatch(LEVEL l, PID p, int nostop) |
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345 | { |
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346 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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296 | trimarchi | 347 | struct timespec ty; |
221 | giacomo | 348 | |
351 | giacomo | 349 | #ifdef EDFSTAR_DEBUG |
350 | edfstar_printf("(E:dis)"); |
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351 | #endif |
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352 | |||
296 | trimarchi | 353 | if (!nostop || proc_table[exec].task_level==l) { |
354 | TIMESPEC_ASSIGN(&ty, &schedule_time); |
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355 | TIMESPEC_ASSIGN(&lev->cap_lasttime, &schedule_time); |
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221 | giacomo | 356 | |
296 | trimarchi | 357 | /* ...and finally, we have to post a capacity event on exec task because the shadow_task consume |
358 | * * capacity on exe task always */ |
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784 | giacomo | 359 | if (proc_table[exec].avail_time > 0) { |
360 | ADDUSEC2TIMESPEC(proc_table[exec].avail_time ,&ty); |
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361 | lev->cap_lev = kern_event_post(&ty,capacity_handler, lev); |
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362 | } |
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296 | trimarchi | 363 | level_table[lev->scheduling_level]->private_dispatch(lev->scheduling_level, p, nostop); |
364 | } |
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365 | else |
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366 | level_table[proc_table[exec].task_level]->public_dispatch(proc_table[exec].task_level, p, nostop); |
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367 | |||
221 | giacomo | 368 | } |
369 | |||
370 | static void EDFSTAR_public_epilogue(LEVEL l, PID p) |
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371 | { |
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372 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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373 | |||
351 | giacomo | 374 | #ifdef EDFSTAR_DEBUG |
375 | edfstar_printf("(E:epi "); |
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376 | #endif |
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221 | giacomo | 377 | |
296 | trimarchi | 378 | if (lev->cap_lev!=NIL) { |
379 | kern_event_delete(lev->cap_lev); |
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380 | lev->cap_lev=NIL; |
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381 | } |
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382 | |||
876 | trimarchi | 383 | |
296 | trimarchi | 384 | if ( proc_table[exec].task_level==l ) { |
385 | |||
785 | giacomo | 386 | if (proc_table[exec].avail_time > 0) EDFSTAR_account_capacity(lev,exec); |
296 | trimarchi | 387 | |
876 | trimarchi | 388 | if (EDFSTAR_private_change_level(l, p)) return; |
389 | |||
296 | trimarchi | 390 | /* check if the wcet is finished... */ |
784 | giacomo | 391 | if (proc_table[exec].avail_time < 0) { |
296 | trimarchi | 392 | /* wcet finished: disable wcet event and count wcet miss */ |
351 | giacomo | 393 | |
394 | #ifdef EDFSTAR_DEBUG |
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395 | edfstar_printf2("W%d",p); |
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396 | #endif |
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296 | trimarchi | 397 | //proc_table[p].control &= ~CONTROL_CAP; |
398 | lev->wcet_miss[exec]++; |
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784 | giacomo | 399 | proc_table[exec].avail_time = 0; |
400 | TRACER_LOGEVENT(FTrace_EVT_task_wcet_violation,proc_table[exec].context,proc_table[exec].task_level); |
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296 | trimarchi | 401 | } |
221 | giacomo | 402 | |
351 | giacomo | 403 | #ifdef EDFSTAR_DEBUG |
404 | edfstar_printf(")"); |
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405 | #endif |
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221 | giacomo | 406 | |
351 | giacomo | 407 | level_table[ lev->scheduling_level ]-> |
408 | private_epilogue(lev->scheduling_level,p); |
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409 | |||
410 | proc_table[exec].status = EDFSTAR_READY; |
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296 | trimarchi | 411 | } else |
412 | level_table[proc_table[exec].task_level]->public_epilogue(proc_table[exec].task_level,p); |
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413 | |||
221 | giacomo | 414 | } |
415 | |||
783 | giacomo | 416 | static void EDFSTAR_public_activate(LEVEL l, PID p, struct timespec *o) |
221 | giacomo | 417 | { |
418 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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419 | struct timespec t; |
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420 | |||
421 | #ifdef EDFSTAR_DEBUG |
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422 | edfstar_printf("(E:act:%d)",p); |
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423 | #endif |
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424 | |||
425 | /* Test if we are trying to activate a non sleeping task */ |
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426 | /* save activation (only if needed... */ |
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427 | if (proc_table[p].status != SLEEP) { |
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428 | /* a periodic task cannot be activated when it is already active */ |
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348 | trimarchi | 429 | /* but aperiodic task can be reactivate before */ |
802 | giacomo | 430 | if (lev->flag[p] & EDFSTAR_FLAG_SPORADIC) { |
431 | if (proc_table[p].status != EDFSTAR_IDLE) { |
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432 | lev->nact[p]++; |
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433 | return; |
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434 | } |
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435 | } else { |
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436 | kern_raise(XACTIVATION,p); |
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351 | giacomo | 437 | } |
221 | giacomo | 438 | } |
439 | |||
440 | kern_gettime(&t); |
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441 | |||
442 | EDFSTAR_internal_activate(lev,p, &t); |
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443 | |||
444 | /* Set the deadline timer */ |
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445 | lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p], |
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446 | EDFSTAR_timer_deadline, |
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447 | (void *)p); |
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448 | |||
449 | } |
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450 | |||
451 | static void EDFSTAR_public_unblock(LEVEL l, PID p) |
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452 | { |
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453 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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454 | |||
351 | giacomo | 455 | #ifdef EDFSTAR_DEBUG |
456 | edfstar_printf("(E:ins)"); |
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457 | #endif |
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221 | giacomo | 458 | |
351 | giacomo | 459 | /* Insert task in the correct position */ |
460 | proc_table[p].status = EDFSTAR_READY; |
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461 | iq_timespec_insert(p,&lev->ready); |
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221 | giacomo | 462 | |
351 | giacomo | 463 | /* and check for preemption! */ |
464 | EDFSTAR_check_preemption(lev); |
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465 | |||
221 | giacomo | 466 | } |
467 | |||
468 | static void EDFSTAR_public_block(LEVEL l, PID p) |
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469 | { |
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470 | |||
351 | giacomo | 471 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
221 | giacomo | 472 | |
351 | giacomo | 473 | #ifdef EDFSTAR_DEBUG |
474 | edfstar_printf("(E:ext)"); |
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475 | #endif |
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221 | giacomo | 476 | |
351 | giacomo | 477 | /* the task is blocked on a synchronization primitive. we have to |
478 | remove it from the master module -and- from the local queue! */ |
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479 | iq_extract(p,&lev->ready); |
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480 | |||
481 | /* and finally, a preemption check! (it will also call guest_end) */ |
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482 | EDFSTAR_check_preemption(lev); |
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221 | giacomo | 483 | } |
484 | |||
485 | static int EDFSTAR_public_message(LEVEL l, PID p, void *m) |
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486 | { |
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487 | |||
351 | giacomo | 488 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
489 | struct timespec temp; |
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876 | trimarchi | 490 | STD_command_message *msg; |
491 | HARD_TASK_MODEL *h; |
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221 | giacomo | 492 | |
351 | giacomo | 493 | #ifdef EDFSTAR_DEBUG |
494 | edfstar_printf("(E:ecy "); |
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495 | #endif |
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221 | giacomo | 496 | |
351 | giacomo | 497 | switch ((long)(m)) { |
221 | giacomo | 498 | |
351 | giacomo | 499 | /* Task EndCycle */ |
500 | case (long)(NULL): |
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348 | trimarchi | 501 | |
876 | trimarchi | 502 | if (EDFSTAR_private_change_level(l,p)) return 0; |
503 | |||
351 | giacomo | 504 | /* we call guest_end directly here because the same task may |
505 | be reinserted in the queue before calling the preemption check! */ |
||
506 | level_table[ lev->scheduling_level ]-> |
||
507 | private_extract(lev->scheduling_level,p); |
||
508 | lev->activated = NIL; |
||
348 | trimarchi | 509 | |
351 | giacomo | 510 | iq_extract(p,&lev->ready); |
348 | trimarchi | 511 | |
351 | giacomo | 512 | /* we reset the capacity counters... */ |
513 | proc_table[p].avail_time = proc_table[p].wcet; |
||
514 | |||
515 | if (lev->nact[p] > 0) { |
||
221 | giacomo | 516 | |
351 | giacomo | 517 | #ifdef EDFSTAR_DEBUG |
518 | edfstar_printf2("E%d",p); |
||
519 | #endif |
||
221 | giacomo | 520 | |
351 | giacomo | 521 | /* Pending activation: reactivate the thread!!! */ |
522 | lev->nact[p]--; |
||
221 | giacomo | 523 | |
351 | giacomo | 524 | /* see also EDFSTAR_timer_deadline */ |
525 | kern_gettime(&temp); |
||
221 | giacomo | 526 | |
351 | giacomo | 527 | EDFSTAR_internal_activate(lev,p, &temp); |
221 | giacomo | 528 | |
351 | giacomo | 529 | /* check if the deadline has already expired */ |
530 | temp = *iq_query_timespec(p, &lev->ready); |
||
531 | if (TIMESPEC_A_LT_B(&temp, &schedule_time)) { |
||
532 | /* count the deadline miss */ |
||
533 | lev->dline_miss[p]++; |
||
534 | kern_event_delete(lev->deadline_timer[p]); |
||
799 | giacomo | 535 | lev->deadline_timer[p] = NIL; |
351 | giacomo | 536 | } |
783 | giacomo | 537 | |
351 | giacomo | 538 | } else { |
221 | giacomo | 539 | |
351 | giacomo | 540 | #ifdef EDFSTAR_DEBUG |
541 | edfstar_printf("e%d",p); |
||
542 | #endif |
||
221 | giacomo | 543 | |
351 | giacomo | 544 | /* the task has terminated his job before it consume the wcet. All OK! */ |
799 | giacomo | 545 | if (lev->flag[p] & EDFSTAR_FLAG_SPORADIC) |
546 | proc_table[p].status = SLEEP; |
||
547 | else |
||
548 | proc_table[p].status = EDFSTAR_IDLE; |
||
351 | giacomo | 549 | |
799 | giacomo | 550 | if (lev->flag[p] & EDFSTAR_FLAG_SPORADIC && lev->deadline_timer[p] != NIL) { |
351 | giacomo | 551 | kern_event_delete(lev->deadline_timer[p]); |
799 | giacomo | 552 | lev->deadline_timer[p] = NIL; |
553 | } |
||
221 | giacomo | 554 | |
351 | giacomo | 555 | /* and finally, a preemption check! */ |
556 | EDFSTAR_check_preemption(lev); |
||
221 | giacomo | 557 | |
351 | giacomo | 558 | /* when the deadline timer fire, it recognize the situation and set |
559 | correctly all the stuffs (like reactivation, etc... ) */ |
||
560 | } |
||
561 | |||
562 | #ifdef EDFSTAR_DEBUG |
||
563 | edfstar_printf(")"); |
||
564 | #endif |
||
783 | giacomo | 565 | |
566 | TRACER_LOGEVENT(FTrace_EVT_task_end_cycle,proc_table[p].context,proc_table[p].task_level); |
||
221 | giacomo | 567 | jet_update_endcycle(); /* Update the Jet data... */ |
568 | break; |
||
569 | |||
570 | default: |
||
876 | trimarchi | 571 | msg = (STD_command_message *)m; |
572 | |||
573 | #ifdef EDFSTAR_DEBUG |
||
574 | edfstar_printf("(E:MSG %d)",msg->command); |
||
575 | #endif |
||
576 | |||
577 | switch(msg->command) { |
||
578 | case STD_SET_NEW_MODEL: |
||
579 | /* if the EDFSTAR_task_create is called, then the pclass must be a |
||
580 | valid pclass. */ |
||
581 | h=(HARD_TASK_MODEL *)(msg->param); |
||
582 | |||
583 | /* now we know that m is a valid model */ |
||
584 | lev->wcet[p] = h->wcet; |
||
585 | lev->period[p] = h->mit; |
||
586 | |||
587 | lev->flag[p] = 0; |
||
588 | lev->deadline_timer[p] = -1; |
||
589 | lev->dline_miss[p] = 0; |
||
590 | lev->wcet_miss[p] = 0; |
||
591 | lev->nact[p] = 0; |
||
221 | giacomo | 592 | |
876 | trimarchi | 593 | break; |
594 | |||
595 | case STD_SET_NEW_LEVEL: |
||
596 | |||
597 | lev->flag[p] |= EDFSTAR_CHANGE_LEVEL; |
||
598 | lev->new_level[p] = (int)(msg->param); |
||
599 | |||
600 | break; |
||
601 | |||
602 | case STD_ACTIVATE_TASK: |
||
603 | |||
604 | /* Enable wcet check */ |
||
605 | proc_table[p].avail_time = lev->wcet[p]; |
||
606 | proc_table[p].wcet = lev->wcet[p]; |
||
607 | proc_table[p].control &= ~CONTROL_CAP; |
||
608 | |||
609 | EDFSTAR_public_activate(l, p,NULL); |
||
610 | |||
611 | break; |
||
612 | |||
613 | |||
614 | } |
||
615 | |||
241 | giacomo | 616 | break; |
221 | giacomo | 617 | |
618 | } |
||
619 | return 0; |
||
620 | } |
||
621 | |||
622 | static void EDFSTAR_public_end(LEVEL l, PID p) |
||
623 | { |
||
624 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
625 | |||
351 | giacomo | 626 | #ifdef EDFSTAR_DEBUG |
627 | edfstar_printf("(E:end)"); |
||
628 | #endif |
||
221 | giacomo | 629 | |
630 | iq_extract(p,&lev->ready); |
||
631 | |||
632 | /* we finally put the task in the ready queue */ |
||
633 | proc_table[p].status = FREE; |
||
634 | |||
635 | iq_insertfirst(p,&freedesc); |
||
348 | trimarchi | 636 | lev->activated=NIL; |
221 | giacomo | 637 | |
638 | if (lev->deadline_timer[p] != -1) { |
||
639 | kern_event_delete(lev->deadline_timer[p]); |
||
799 | giacomo | 640 | lev->deadline_timer[p] = NIL; |
221 | giacomo | 641 | } |
642 | |||
643 | /* and finally, a preemption check! (it will also call guest_end) */ |
||
644 | EDFSTAR_check_preemption(lev); |
||
645 | } |
||
646 | |||
647 | /* Guest Functions |
||
648 | These functions manages a JOB_TASK_MODEL, that is used to put |
||
649 | a guest task in the EDFSTAR ready queue. */ |
||
650 | |||
651 | static void EDFSTAR_private_insert(LEVEL l, PID p, TASK_MODEL *m) |
||
652 | { |
||
653 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
654 | JOB_TASK_MODEL *job; |
||
655 | |||
656 | if (m->pclass != JOB_PCLASS || (m->level != 0 && m->level != l) ) { |
||
657 | kern_raise(XINVALID_TASK, p); |
||
658 | return; |
||
659 | } |
||
660 | |||
661 | job = (JOB_TASK_MODEL *)m; |
||
662 | |||
663 | /* if the EDFSTAR_guest_create is called, then the pclass must be a |
||
664 | valid pclass. */ |
||
665 | |||
666 | *iq_query_timespec(p, &lev->ready) = job->deadline; |
||
667 | |||
668 | lev->deadline_timer[p] = -1; |
||
669 | lev->dline_miss[p] = 0; |
||
670 | lev->wcet_miss[p] = 0; |
||
671 | lev->nact[p] = 0; |
||
672 | |||
673 | if (job->noraiseexc) |
||
674 | lev->flag[p] |= EDFSTAR_FLAG_NORAISEEXC; |
||
675 | else { |
||
676 | lev->flag[p] &= ~EDFSTAR_FLAG_NORAISEEXC; |
||
677 | lev->deadline_timer[p] = kern_event_post(iq_query_timespec(p, &lev->ready), |
||
678 | EDFSTAR_timer_guest_deadline, |
||
679 | (void *)p); |
||
680 | } |
||
681 | |||
682 | lev->period[p] = job->period; |
||
683 | |||
684 | /* Insert task in the correct position */ |
||
685 | iq_timespec_insert(p,&lev->ready); |
||
686 | proc_table[p].status = EDFSTAR_READY; |
||
687 | |||
688 | /* check for preemption */ |
||
689 | EDFSTAR_check_preemption(lev); |
||
690 | |||
691 | /* there is no bandwidth guarantee at this level, it is performed |
||
692 | by the level that inserts guest tasks... */ |
||
693 | } |
||
694 | |||
695 | static void EDFSTAR_private_dispatch(LEVEL l, PID p, int nostop) |
||
696 | { |
||
697 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
698 | |||
699 | level_table[ lev->scheduling_level ]-> |
||
700 | private_dispatch(lev->scheduling_level,p,nostop); |
||
701 | } |
||
702 | |||
703 | static void EDFSTAR_private_epilogue(LEVEL l, PID p) |
||
704 | { |
||
705 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
706 | |||
707 | /* the task has been preempted. it returns into the ready queue... */ |
||
708 | level_table[ lev->scheduling_level ]-> |
||
709 | private_epilogue(lev->scheduling_level,p); |
||
710 | |||
711 | proc_table[p].status = EDFSTAR_READY; |
||
712 | } |
||
713 | |||
714 | static void EDFSTAR_private_extract(LEVEL l, PID p) |
||
715 | { |
||
716 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
717 | |||
718 | #ifdef EDFSTAR_DEBUG |
||
719 | //kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]); |
||
720 | #endif |
||
721 | |||
722 | iq_extract(p, &lev->ready); |
||
723 | |||
724 | /* we remove the deadline timer, because the slice is finished */ |
||
725 | if (lev->deadline_timer[p] != NIL) { |
||
726 | #ifdef EDFSTAR_DEBUG |
||
727 | // kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]); |
||
728 | #endif |
||
729 | kern_event_delete(lev->deadline_timer[p]); |
||
730 | lev->deadline_timer[p] = NIL; |
||
731 | } |
||
732 | |||
733 | /* and finally, a preemption check! (it will also call guest_end() */ |
||
734 | EDFSTAR_check_preemption(lev); |
||
735 | } |
||
736 | |||
737 | /* Registration functions */ |
||
738 | |||
739 | /* Registration function: |
||
740 | int flags the init flags ... see EDFSTAR.h */ |
||
741 | |||
742 | LEVEL EDFSTAR_register_level(int master) |
||
743 | { |
||
744 | LEVEL l; /* the level that we register */ |
||
745 | EDFSTAR_level_des *lev; /* for readableness only */ |
||
746 | PID i; /* a counter */ |
||
747 | |||
748 | #ifdef EDFSTAR_DEBUG |
||
749 | printk("EDFSTAR_register_level\n"); |
||
750 | #endif |
||
751 | |||
752 | /* request an entry in the level_table */ |
||
753 | l = level_alloc_descriptor(sizeof(EDFSTAR_level_des)); |
||
754 | |||
755 | lev = (EDFSTAR_level_des *)level_table[l]; |
||
756 | |||
757 | /* fill the standard descriptor */ |
||
758 | lev->l.private_insert = EDFSTAR_private_insert; |
||
759 | lev->l.private_extract = EDFSTAR_private_extract; |
||
760 | lev->l.private_dispatch = EDFSTAR_private_dispatch; |
||
761 | lev->l.private_epilogue = EDFSTAR_private_epilogue; |
||
762 | |||
763 | lev->l.public_guarantee = NULL; |
||
764 | lev->l.public_eligible = EDFSTAR_public_eligible; |
||
765 | lev->l.public_create = EDFSTAR_public_create; |
||
766 | lev->l.public_end = EDFSTAR_public_end; |
||
767 | lev->l.public_dispatch = EDFSTAR_public_dispatch; |
||
768 | lev->l.public_epilogue = EDFSTAR_public_epilogue; |
||
769 | lev->l.public_activate = EDFSTAR_public_activate; |
||
770 | lev->l.public_unblock = EDFSTAR_public_unblock; |
||
771 | lev->l.public_block = EDFSTAR_public_block; |
||
772 | lev->l.public_message = EDFSTAR_public_message; |
||
773 | |||
774 | /* fill the EDFSTAR descriptor part */ |
||
775 | for(i=0; i<MAX_PROC; i++) { |
||
776 | lev->period[i] = 0; |
||
777 | lev->deadline_timer[i] = -1; |
||
778 | lev->flag[i] = 0; |
||
779 | lev->dline_miss[i] = 0; |
||
780 | lev->wcet_miss[i] = 0; |
||
781 | lev->nact[i] = 0; |
||
782 | lev->budget[i] = NIL; |
||
783 | } |
||
784 | |||
785 | iq_init(&lev->ready, NULL, IQUEUE_NO_PRIORITY); |
||
786 | lev->activated = NIL; |
||
787 | |||
788 | lev->scheduling_level = master; |
||
298 | giacomo | 789 | lev->cap_lev = NIL; |
296 | trimarchi | 790 | NULL_TIMESPEC(&lev->cap_lasttime); |
221 | giacomo | 791 | |
792 | return l; |
||
793 | } |
||
794 | |||
795 | int EDFSTAR_get_dline_miss(PID p) |
||
796 | { |
||
797 | LEVEL l = proc_table[p].task_level; |
||
798 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
799 | |||
800 | return lev->dline_miss[p]; |
||
801 | } |
||
802 | |||
803 | int EDFSTAR_get_wcet_miss(PID p) |
||
804 | { |
||
805 | LEVEL l = proc_table[p].task_level; |
||
806 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
807 | |||
808 | return lev->wcet_miss[p]; |
||
809 | } |
||
810 | |||
811 | int EDFSTAR_get_nact(PID p) |
||
812 | { |
||
813 | LEVEL l = proc_table[p].task_level; |
||
814 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
815 | |||
816 | return lev->nact[p]; |
||
817 | } |
||
818 | |||
819 | int EDFSTAR_reset_dline_miss(PID p) |
||
820 | { |
||
821 | LEVEL l = proc_table[p].task_level; |
||
822 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
823 | |||
824 | lev->dline_miss[p] = 0; |
||
825 | return 0; |
||
826 | } |
||
827 | |||
828 | int EDFSTAR_reset_wcet_miss(PID p) |
||
829 | { |
||
830 | LEVEL l = proc_table[p].task_level; |
||
831 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
832 | |||
833 | lev->wcet_miss[p] = 0; |
||
834 | return 0; |
||
835 | } |
||
836 | |||
837 | int EDFSTAR_setbudget(LEVEL l, PID p, int budget) |
||
838 | { |
||
839 | |||
840 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
841 | |||
842 | lev->budget[p] = budget; |
||
843 | |||
844 | return 0; |
||
845 | |||
846 | } |
||
847 | |||
848 | int EDFSTAR_getbudget(LEVEL l, PID p) |
||
849 | { |
||
850 | |||
851 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
852 | |||
853 | return lev->budget[p]; |
||
854 | |||
855 | } |
||
236 | giacomo | 856 | |
792 | trimarchi | 857 | void EDFSTAR_set_nopreemtive_current(LEVEL l) { |
858 | |||
859 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
860 | |||
861 | lev->flag[lev->activated]|=EDFSTAR_FLAG_NOPREEMPT; |
||
862 | } |
||
863 | |||
864 | void EDFSTAR_unset_nopreemtive_current(LEVEL l) { |
||
865 | |||
866 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
867 | |||
868 | lev->flag[lev->activated]&=~EDFSTAR_FLAG_NOPREEMPT; |
||
869 | } |
||
870 | |||
236 | giacomo | 871 | int EDFSTAR_budget_has_thread(LEVEL l, int budget) |
872 | { |
||
873 | |||
874 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
875 | int i; |
||
876 | |||
877 | for(i = 0; i< MAX_PROC; i++) |
||
878 | if (lev->budget[i] == budget) return 1; |
||
879 | |||
880 | return 0; |
||
881 | |||
882 | } |