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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 | ------------ |
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226 | giacomo | 21 | CVS : $Id: edfstar.c,v 1.3 2003-09-11 15:42:01 giacomo Exp $ |
221 | giacomo | 22 | |
23 | File: $File$ |
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226 | giacomo | 24 | Revision: $Revision: 1.3 $ |
25 | Last update: $Date: 2003-09-11 15:42:01 $ |
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221 | giacomo | 26 | ------------ |
27 | **/ |
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28 | |||
29 | /* |
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30 | * Copyright (C) 2001 Paolo Gai |
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31 | * |
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32 | * This program is free software; you can redistribute it and/or modify |
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33 | * it under the terms of the GNU General Public License as published by |
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34 | * the Free Software Foundation; either version 2 of the License, or |
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35 | * (at your option) any later version. |
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36 | * |
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37 | * This program is distributed in the hope that it will be useful, |
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38 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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39 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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40 | * GNU General Public License for more details. |
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41 | * |
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42 | * You should have received a copy of the GNU General Public License |
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43 | * along with this program; if not, write to the Free Software |
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44 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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45 | * |
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46 | */ |
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47 | |||
48 | #include "edfstar.h" |
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49 | #include <ll/stdio.h> |
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50 | #include <ll/string.h> |
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51 | #include <kernel/model.h> |
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52 | #include <kernel/descr.h> |
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53 | #include <kernel/var.h> |
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54 | #include <kernel/func.h> |
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55 | #include <kernel/trace.h> |
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56 | |||
57 | |||
58 | #define EDFSTAR_CHANGE_LEVEL 1 |
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59 | |||
60 | /* for iqueues */ |
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61 | /* #include "iqueue.h" Now iqueues are the only queue type available |
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62 | into the kernel */ |
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63 | #include <kernel/iqueue.h> |
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64 | |||
65 | /* for BUDGET_TASK_MODEL */ |
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66 | #include "cbsstar.h" |
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67 | #include <comm_message.h> |
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68 | |||
69 | /* |
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70 | * DEBUG stuffs begin |
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71 | */ |
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72 | |||
224 | giacomo | 73 | //#define EDFSTAR_DEBUG |
221 | giacomo | 74 | |
75 | #ifdef EDFSTAR_DEBUG |
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76 | |||
77 | static __inline__ fake_printf(char *fmt, ...) {} |
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78 | |||
79 | //#define edfstar_printf fake_printf |
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80 | //#define edfstar_printf2 fake_printf |
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81 | //#define edfstar_printf3 fake_printf |
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82 | |||
83 | #define edfstar_printf kern_printf |
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84 | #define edfstar_printf2 kern_printf |
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85 | #define edfstar_printf3 kern_printf |
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86 | #endif |
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87 | |||
88 | /* |
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89 | * DEBUG stuffs end |
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90 | */ |
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91 | |||
92 | /* Status used in the level */ |
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93 | #define EDFSTAR_READY MODULE_STATUS_BASE /* - Ready status */ |
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94 | #define EDFSTAR_IDLE MODULE_STATUS_BASE+4 /* to wait the deadline */ |
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95 | |||
96 | /* flags */ |
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97 | #define EDFSTAR_FLAG_NORAISEEXC 2 |
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98 | |||
99 | /* the level redefinition for the Earliest Deadline First level */ |
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100 | typedef struct { |
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101 | level_des l; /* the standard level descriptor */ |
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102 | |||
103 | TIME period[MAX_PROC]; /* The task periods; the deadlines are |
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104 | stored in the priority field */ |
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105 | int deadline_timer[MAX_PROC]; |
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106 | /* The task deadline timers */ |
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107 | |||
108 | struct timespec deadline_timespec[MAX_PROC]; |
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109 | |||
110 | int dline_miss[MAX_PROC]; /* Deadline miss counter */ |
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111 | int wcet_miss[MAX_PROC]; /* Wcet miss counter */ |
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112 | |||
113 | int nact[MAX_PROC]; /* Wcet miss counter */ |
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114 | |||
115 | int flag[MAX_PROC]; |
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116 | /* used to manage the JOB_TASK_MODEL and the |
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117 | periodicity */ |
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118 | |||
119 | IQUEUE ready; /* the ready queue */ |
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120 | |||
121 | PID activated; /* the task that has been inserted into the |
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122 | master module */ |
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123 | |||
124 | int budget[MAX_PROC]; |
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125 | |||
126 | int scheduling_level; |
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127 | |||
128 | int new_level[MAX_PROC]; |
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129 | int wcet[MAX_PROC]; /* save the wcet fields */ |
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130 | |||
131 | } EDFSTAR_level_des; |
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132 | |||
133 | static void EDFSTAR_check_preemption(EDFSTAR_level_des *lev) |
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134 | { |
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135 | PID first; |
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136 | |||
137 | #ifdef EDFSTAR_DEBUG |
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138 | edfstar_printf("(E:chk)"); |
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139 | #endif |
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140 | |||
141 | if ((first = iq_query_first(&lev->ready)) != lev->activated) { |
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142 | if (lev->activated != NIL) |
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143 | level_table[ lev->scheduling_level ]-> |
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144 | private_extract(lev->scheduling_level, lev->activated); |
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145 | |||
146 | lev->activated = first; |
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147 | |||
148 | if (first != NIL) { |
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149 | BUDGET_TASK_MODEL b; |
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150 | budget_task_default_model(b, lev->budget[first]); |
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151 | |||
152 | level_table[ lev->scheduling_level ]-> |
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153 | private_insert(lev->scheduling_level, first, (TASK_MODEL *)&b); |
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154 | } |
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155 | } |
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156 | } |
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157 | |||
158 | static void EDFSTAR_timer_deadline(void *par); |
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159 | |||
160 | static void EDFSTAR_internal_activate(EDFSTAR_level_des *lev, PID p, |
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161 | struct timespec *t) |
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162 | { |
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163 | #ifdef EDFSTAR_DEBUG |
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164 | edfstar_printf("(E:iact)"); |
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165 | #endif |
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166 | |||
167 | ADDUSEC2TIMESPEC(lev->period[p], t); |
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168 | |||
169 | *iq_query_timespec(p, &lev->ready) = *t; |
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170 | lev->deadline_timespec[p] = *t; |
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171 | |||
172 | /* Insert task in the correct position */ |
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173 | proc_table[p].status = EDFSTAR_READY; |
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174 | iq_timespec_insert(p,&lev->ready); |
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175 | |||
176 | /* needed because when there is a wcet miss I disable CONTROL_CAP */ |
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177 | proc_table[p].control |= CONTROL_CAP; |
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178 | |||
179 | /* check for preemption */ |
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180 | EDFSTAR_check_preemption(lev); |
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181 | } |
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182 | |||
183 | static void EDFSTAR_timer_deadline(void *par) |
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184 | { |
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185 | PID p = (PID) par; |
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186 | EDFSTAR_level_des *lev; |
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187 | |||
188 | #ifdef EDFSTAR_DEBUG |
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189 | // edfstar_printf("(E:tdl "); |
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190 | #endif |
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191 | |||
192 | lev = (EDFSTAR_level_des *)level_table[proc_table[p].task_level]; |
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193 | |||
194 | switch (proc_table[p].status) { |
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195 | case EDFSTAR_IDLE: |
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196 | #ifdef EDFSTAR_DEBUG |
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197 | // edfstar_printf2("I%d",p); |
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198 | #endif |
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199 | /* set the request time */ |
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200 | EDFSTAR_internal_activate(lev,p,iq_query_timespec(p, &lev->ready)); |
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201 | |||
202 | event_need_reschedule(); |
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203 | break; |
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204 | |||
205 | default: |
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224 | giacomo | 206 | #ifdef EDFSTAR_DEBUG |
221 | giacomo | 207 | kern_printf("(E:Dl:%d)",p); |
224 | giacomo | 208 | #endif |
221 | giacomo | 209 | /* else, a deadline miss occurred!!! */ |
210 | lev->dline_miss[p]++; |
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211 | |||
212 | /* the task is into another state */ |
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213 | lev->nact[p]++; |
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214 | |||
215 | /* Set the deadline timer */ |
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216 | ADDUSEC2TIMESPEC(lev->period[p], &lev->deadline_timespec[p]); |
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217 | } |
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218 | |||
219 | /* Set the deadline timer */ |
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220 | lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p], |
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221 | EDFSTAR_timer_deadline, |
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222 | (void *)p); |
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223 | |||
224 | #ifdef EDFSTAR_DEBUG |
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225 | // edfstar_printf(")"); |
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226 | #endif |
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227 | } |
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228 | |||
229 | static void EDFSTAR_timer_guest_deadline(void *par) |
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230 | { |
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231 | PID p = (PID) par; |
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232 | |||
233 | #ifdef EDFSTAR_DEBUG |
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234 | edfstar_printf("(E:gdl)"); |
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235 | #endif |
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236 | |||
237 | kern_raise(XDEADLINE_MISS,p); |
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238 | } |
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239 | |||
240 | static int EDFSTAR_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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241 | { |
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242 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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243 | |||
244 | /* if the EDFSTAR_task_create is called, then the pclass must be a |
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245 | valid pclass. */ |
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246 | HARD_TASK_MODEL *h; |
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247 | |||
248 | if (m->pclass != HARD_PCLASS) return -1; |
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249 | if (m->level != 0 && m->level != l) return -1; |
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250 | h = (HARD_TASK_MODEL *)m; |
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251 | if (!h->wcet || !h->mit || h->periodicity != PERIODIC) return -1; |
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252 | /* now we know that m is a valid model */ |
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253 | |||
254 | |||
255 | #ifdef EDFSTAR_DEBUG |
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256 | edfstar_printf("(E:tcr)"); |
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257 | #endif |
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258 | |||
259 | lev->period[p] = h->mit; |
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260 | |||
261 | lev->flag[p] = 0; |
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262 | lev->deadline_timer[p] = -1; |
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263 | lev->dline_miss[p] = 0; |
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264 | lev->wcet_miss[p] = 0; |
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265 | lev->nact[p] = 0; |
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266 | |||
267 | /* Enable wcet check */ |
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268 | proc_table[p].avail_time = h->wcet; |
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269 | proc_table[p].wcet = h->wcet; |
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270 | proc_table[p].control |= CONTROL_CAP; |
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271 | |||
272 | return 0; /* OK, also if the task cannot be guaranteed... */ |
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273 | } |
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274 | |||
275 | static int EDFSTAR_public_eligible(LEVEL l, PID p) |
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276 | { |
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277 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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278 | |||
279 | #ifdef EDFSTAR_DEBUG |
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280 | edfstar_printf2("(E:eli)"); |
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281 | #endif |
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282 | |||
283 | return level_table[ lev->scheduling_level ]-> |
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284 | private_eligible(lev->scheduling_level,p); |
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285 | } |
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286 | |||
287 | static void EDFSTAR_public_dispatch(LEVEL l, PID p, int nostop) |
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288 | { |
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289 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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290 | |||
291 | #ifdef EDFSTAR_DEBUG |
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292 | edfstar_printf("(E:dis)"); |
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293 | |||
294 | edfstar_printf3("(%d %d)", |
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295 | iq_query_timespec(p, &lev->ready)->tv_nsec/1000000, |
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296 | schedule_time.tv_nsec/1000000); |
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297 | #endif |
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298 | |||
299 | level_table[ lev->scheduling_level ]-> |
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300 | private_dispatch(lev->scheduling_level,p,nostop); |
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301 | } |
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302 | |||
226 | giacomo | 303 | static int EDFSTAR_private_change_level(LEVEL l, PID p) |
221 | giacomo | 304 | { |
305 | |||
306 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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307 | |||
308 | /* Change task level */ |
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309 | if (lev->flag[p] & EDFSTAR_CHANGE_LEVEL) { |
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226 | giacomo | 310 | |
221 | giacomo | 311 | STD_command_message msg; |
226 | giacomo | 312 | |
221 | giacomo | 313 | proc_table[p].status = SLEEP; |
226 | giacomo | 314 | |
315 | level_table[lev->scheduling_level]->private_extract(lev->scheduling_level,p); |
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221 | giacomo | 316 | iq_extract(p,&lev->ready); |
226 | giacomo | 317 | |
221 | giacomo | 318 | if (lev->deadline_timer[p] != -1) |
319 | kern_event_delete(lev->deadline_timer[p]); |
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226 | giacomo | 320 | |
221 | giacomo | 321 | EDFSTAR_check_preemption(lev); |
226 | giacomo | 322 | |
221 | giacomo | 323 | lev->nact[p] = 0; |
324 | lev->budget[p] = -1; |
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325 | proc_table[p].task_level = lev->new_level[p]; |
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326 | |||
327 | /* Send change level command to local scheduler */ |
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328 | |||
329 | msg.command = STD_ACTIVATE_TASK; |
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330 | msg.param = NULL; |
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331 | |||
332 | level_table[ lev->new_level[p] ]->public_message(lev->new_level[p],p,&msg); |
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333 | |||
334 | return 1; |
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335 | |||
336 | } |
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337 | |||
338 | return 0; |
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339 | |||
340 | } |
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341 | |||
342 | static void EDFSTAR_public_epilogue(LEVEL l, PID p) |
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343 | { |
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344 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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345 | |||
346 | #ifdef EDFSTAR_DEBUG |
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347 | edfstar_printf("(E:epi "); |
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348 | #endif |
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349 | |||
226 | giacomo | 350 | if (EDFSTAR_private_change_level(l, p)) return; |
221 | giacomo | 351 | |
352 | /* check if the wcet is finished... */ |
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353 | if (proc_table[p].avail_time <= 0 && proc_table[p].control&CONTROL_CAP) { |
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354 | /* wcet finished: disable wcet event and count wcet miss */ |
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355 | #ifdef EDFSTAR_DEBUG |
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356 | edfstar_printf2("W%d",p); |
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357 | #endif |
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358 | proc_table[p].control &= ~CONTROL_CAP; |
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359 | lev->wcet_miss[p]++; |
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360 | } |
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361 | #ifdef EDFSTAR_DEBUG |
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362 | edfstar_printf(")"); |
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363 | #endif |
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364 | |||
365 | level_table[ lev->scheduling_level ]-> |
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366 | private_epilogue(lev->scheduling_level,p); |
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367 | |||
368 | proc_table[p].status = EDFSTAR_READY; |
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369 | } |
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370 | |||
371 | static void EDFSTAR_public_activate(LEVEL l, PID p) |
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372 | { |
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373 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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374 | struct timespec t; |
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375 | |||
376 | #ifdef EDFSTAR_DEBUG |
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377 | edfstar_printf("(E:act:%d)",p); |
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378 | #endif |
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379 | |||
380 | /* Test if we are trying to activate a non sleeping task */ |
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381 | /* save activation (only if needed... */ |
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382 | if (proc_table[p].status != SLEEP) { |
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383 | /* a periodic task cannot be activated when it is already active */ |
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384 | kern_raise(XACTIVATION,p); |
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385 | return; |
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386 | } |
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387 | |||
388 | kern_gettime(&t); |
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389 | |||
390 | EDFSTAR_internal_activate(lev,p, &t); |
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391 | |||
392 | /* Set the deadline timer */ |
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393 | lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p], |
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394 | EDFSTAR_timer_deadline, |
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395 | (void *)p); |
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396 | |||
397 | } |
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398 | |||
399 | static void EDFSTAR_public_unblock(LEVEL l, PID p) |
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400 | { |
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401 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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402 | |||
403 | #ifdef EDFSTAR_DEBUG |
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404 | edfstar_printf("(E:ins)"); |
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405 | #endif |
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406 | |||
407 | /* Insert task in the correct position */ |
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408 | proc_table[p].status = EDFSTAR_READY; |
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409 | iq_timespec_insert(p,&lev->ready); |
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410 | |||
411 | /* and check for preemption! */ |
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412 | EDFSTAR_check_preemption(lev); |
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413 | } |
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414 | |||
415 | static void EDFSTAR_public_block(LEVEL l, PID p) |
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416 | { |
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417 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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418 | |||
419 | #ifdef EDFSTAR_DEBUG |
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420 | edfstar_printf("(E:ext)"); |
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421 | #endif |
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422 | |||
423 | /* the task is blocked on a synchronization primitive. we have to |
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424 | remove it from the master module -and- from the local queue! */ |
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425 | iq_extract(p,&lev->ready); |
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426 | |||
427 | /* and finally, a preemption check! (it will also call guest_end) */ |
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428 | EDFSTAR_check_preemption(lev); |
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429 | } |
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430 | |||
431 | static int EDFSTAR_public_message(LEVEL l, PID p, void *m) |
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432 | { |
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433 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
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434 | struct timespec temp; |
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435 | STD_command_message *msg; |
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436 | HARD_TASK_MODEL *h; |
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437 | |||
438 | #ifdef EDFSTAR_DEBUG |
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439 | edfstar_printf("(E:ecy "); |
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440 | #endif |
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441 | |||
442 | switch ((long)(m)) { |
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443 | |||
444 | /* Task EndCycle */ |
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445 | case (long)(NULL): |
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446 | |||
226 | giacomo | 447 | if (EDFSTAR_private_change_level(l,p)) return 0; |
448 | |||
221 | giacomo | 449 | /* we call guest_end directly here because the same task may |
450 | be reinserted in the queue before calling the preemption check! */ |
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451 | level_table[ lev->scheduling_level ]-> |
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452 | private_extract(lev->scheduling_level,p); |
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453 | lev->activated = NIL; |
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454 | |||
455 | iq_extract(p,&lev->ready); |
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456 | |||
457 | /* we reset the capacity counters... */ |
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458 | proc_table[p].avail_time = proc_table[p].wcet; |
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459 | |||
460 | if (lev->nact[p] > 0) { |
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461 | |||
462 | #ifdef EDFSTAR_DEBUG |
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463 | edfstar_printf2("E%d",p); |
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464 | #endif |
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465 | |||
466 | /* Pending activation: reactivate the thread!!! */ |
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467 | lev->nact[p]--; |
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468 | |||
469 | /* see also EDFSTAR_timer_deadline */ |
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470 | kern_gettime(&temp); |
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471 | |||
472 | EDFSTAR_internal_activate(lev,p, &temp); |
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473 | |||
474 | /* check if the deadline has already expired */ |
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475 | temp = *iq_query_timespec(p, &lev->ready); |
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476 | if (TIMESPEC_A_LT_B(&temp, &schedule_time)) { |
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477 | /* count the deadline miss */ |
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478 | lev->dline_miss[p]++; |
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479 | kern_event_delete(lev->deadline_timer[p]); |
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480 | } |
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481 | |||
482 | } else { |
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483 | |||
484 | #ifdef EDFSTAR_DEBUG |
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485 | edfstar_printf("e%d",p); |
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486 | #endif |
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487 | |||
488 | /* the task has terminated his job before it consume the wcet. All OK! */ |
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489 | proc_table[p].status = EDFSTAR_IDLE; |
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490 | |||
491 | /* and finally, a preemption check! */ |
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492 | EDFSTAR_check_preemption(lev); |
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493 | |||
494 | /* when the deadline timer fire, it recognize the situation and set |
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495 | correctly all the stuffs (like reactivation, etc... ) */ |
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496 | } |
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497 | #ifdef EDFSTAR_DEBUG |
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498 | edfstar_printf(")"); |
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499 | #endif |
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500 | |||
501 | jet_update_endcycle(); /* Update the Jet data... */ |
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502 | trc_logevent(TRC_ENDCYCLE,&exec_shadow); /* tracer stuff */ |
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503 | break; |
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504 | |||
505 | default: |
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506 | |||
507 | msg = (STD_command_message *)m; |
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226 | giacomo | 508 | |
509 | #ifdef EDFSTAR_DEBUG |
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510 | edfstar_printf("(E:MSG %d)",msg->command); |
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511 | #endif |
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512 | |||
221 | giacomo | 513 | switch(msg->command) { |
514 | case STD_SET_NEW_MODEL: |
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515 | /* if the EDFSTAR_task_create is called, then the pclass must be a |
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516 | valid pclass. */ |
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517 | h=(HARD_TASK_MODEL *)(msg->param); |
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518 | |||
519 | /* now we know that m is a valid model */ |
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226 | giacomo | 520 | lev->wcet[p] = h->wcet; |
221 | giacomo | 521 | lev->period[p] = h->mit; |
522 | |||
523 | lev->flag[p] = 0; |
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524 | lev->deadline_timer[p] = -1; |
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525 | lev->dline_miss[p] = 0; |
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526 | lev->wcet_miss[p] = 0; |
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527 | lev->nact[p] = 0; |
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528 | |||
529 | break; |
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530 | |||
531 | case STD_SET_NEW_LEVEL: |
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532 | |||
533 | lev->flag[p] |= EDFSTAR_CHANGE_LEVEL; |
||
534 | lev->new_level[p] = (int)(msg->param); |
||
535 | |||
536 | break; |
||
537 | |||
538 | case STD_ACTIVATE_TASK: |
||
539 | |||
540 | /* Enable wcet check */ |
||
541 | proc_table[p].avail_time = lev->wcet[p]; |
||
542 | proc_table[p].wcet = lev->wcet[p]; |
||
543 | proc_table[p].control |= CONTROL_CAP; |
||
226 | giacomo | 544 | |
221 | giacomo | 545 | EDFSTAR_public_activate(l, p); |
546 | |||
547 | break; |
||
548 | |||
549 | |||
550 | } |
||
551 | } |
||
552 | return 0; |
||
553 | } |
||
554 | |||
555 | static void EDFSTAR_public_end(LEVEL l, PID p) |
||
556 | { |
||
557 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
558 | |||
559 | #ifdef EDFSTAR_DEBUG |
||
560 | edfstar_printf("(E:end)"); |
||
561 | #endif |
||
562 | |||
563 | iq_extract(p,&lev->ready); |
||
564 | |||
565 | /* we finally put the task in the ready queue */ |
||
566 | proc_table[p].status = FREE; |
||
567 | |||
568 | iq_insertfirst(p,&freedesc); |
||
569 | |||
570 | if (lev->deadline_timer[p] != -1) { |
||
571 | kern_event_delete(lev->deadline_timer[p]); |
||
572 | } |
||
573 | |||
574 | /* and finally, a preemption check! (it will also call guest_end) */ |
||
575 | EDFSTAR_check_preemption(lev); |
||
576 | } |
||
577 | |||
578 | /* Guest Functions |
||
579 | These functions manages a JOB_TASK_MODEL, that is used to put |
||
580 | a guest task in the EDFSTAR ready queue. */ |
||
581 | |||
582 | static void EDFSTAR_private_insert(LEVEL l, PID p, TASK_MODEL *m) |
||
583 | { |
||
584 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
585 | JOB_TASK_MODEL *job; |
||
586 | |||
587 | if (m->pclass != JOB_PCLASS || (m->level != 0 && m->level != l) ) { |
||
588 | kern_raise(XINVALID_TASK, p); |
||
589 | return; |
||
590 | } |
||
591 | |||
592 | job = (JOB_TASK_MODEL *)m; |
||
593 | |||
594 | /* if the EDFSTAR_guest_create is called, then the pclass must be a |
||
595 | valid pclass. */ |
||
596 | |||
597 | *iq_query_timespec(p, &lev->ready) = job->deadline; |
||
598 | |||
599 | lev->deadline_timer[p] = -1; |
||
600 | lev->dline_miss[p] = 0; |
||
601 | lev->wcet_miss[p] = 0; |
||
602 | lev->nact[p] = 0; |
||
603 | |||
604 | if (job->noraiseexc) |
||
605 | lev->flag[p] |= EDFSTAR_FLAG_NORAISEEXC; |
||
606 | else { |
||
607 | lev->flag[p] &= ~EDFSTAR_FLAG_NORAISEEXC; |
||
608 | lev->deadline_timer[p] = kern_event_post(iq_query_timespec(p, &lev->ready), |
||
609 | EDFSTAR_timer_guest_deadline, |
||
610 | (void *)p); |
||
611 | } |
||
612 | |||
613 | lev->period[p] = job->period; |
||
614 | |||
615 | /* Insert task in the correct position */ |
||
616 | iq_timespec_insert(p,&lev->ready); |
||
617 | proc_table[p].status = EDFSTAR_READY; |
||
618 | |||
619 | /* check for preemption */ |
||
620 | EDFSTAR_check_preemption(lev); |
||
621 | |||
622 | /* there is no bandwidth guarantee at this level, it is performed |
||
623 | by the level that inserts guest tasks... */ |
||
624 | } |
||
625 | |||
626 | static void EDFSTAR_private_dispatch(LEVEL l, PID p, int nostop) |
||
627 | { |
||
628 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
629 | |||
630 | level_table[ lev->scheduling_level ]-> |
||
631 | private_dispatch(lev->scheduling_level,p,nostop); |
||
632 | } |
||
633 | |||
634 | static void EDFSTAR_private_epilogue(LEVEL l, PID p) |
||
635 | { |
||
636 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
637 | |||
638 | /* the task has been preempted. it returns into the ready queue... */ |
||
639 | level_table[ lev->scheduling_level ]-> |
||
640 | private_epilogue(lev->scheduling_level,p); |
||
641 | |||
642 | proc_table[p].status = EDFSTAR_READY; |
||
643 | } |
||
644 | |||
645 | static void EDFSTAR_private_extract(LEVEL l, PID p) |
||
646 | { |
||
647 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
648 | |||
649 | #ifdef EDFSTAR_DEBUG |
||
650 | //kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]); |
||
651 | #endif |
||
652 | |||
653 | iq_extract(p, &lev->ready); |
||
654 | |||
655 | /* we remove the deadline timer, because the slice is finished */ |
||
656 | if (lev->deadline_timer[p] != NIL) { |
||
657 | #ifdef EDFSTAR_DEBUG |
||
658 | // kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]); |
||
659 | #endif |
||
660 | kern_event_delete(lev->deadline_timer[p]); |
||
661 | lev->deadline_timer[p] = NIL; |
||
662 | } |
||
663 | |||
664 | /* and finally, a preemption check! (it will also call guest_end() */ |
||
665 | EDFSTAR_check_preemption(lev); |
||
666 | } |
||
667 | |||
668 | /* Registration functions */ |
||
669 | |||
670 | /* Registration function: |
||
671 | int flags the init flags ... see EDFSTAR.h */ |
||
672 | |||
673 | LEVEL EDFSTAR_register_level(int master) |
||
674 | { |
||
675 | LEVEL l; /* the level that we register */ |
||
676 | EDFSTAR_level_des *lev; /* for readableness only */ |
||
677 | PID i; /* a counter */ |
||
678 | |||
679 | #ifdef EDFSTAR_DEBUG |
||
680 | printk("EDFSTAR_register_level\n"); |
||
681 | #endif |
||
682 | |||
683 | /* request an entry in the level_table */ |
||
684 | l = level_alloc_descriptor(sizeof(EDFSTAR_level_des)); |
||
685 | |||
686 | lev = (EDFSTAR_level_des *)level_table[l]; |
||
687 | |||
688 | printk(" lev=%d\n",(int)lev); |
||
689 | |||
690 | /* fill the standard descriptor */ |
||
691 | lev->l.private_insert = EDFSTAR_private_insert; |
||
692 | lev->l.private_extract = EDFSTAR_private_extract; |
||
693 | lev->l.private_dispatch = EDFSTAR_private_dispatch; |
||
694 | lev->l.private_epilogue = EDFSTAR_private_epilogue; |
||
695 | |||
696 | lev->l.public_guarantee = NULL; |
||
697 | lev->l.public_eligible = EDFSTAR_public_eligible; |
||
698 | lev->l.public_create = EDFSTAR_public_create; |
||
699 | lev->l.public_end = EDFSTAR_public_end; |
||
700 | lev->l.public_dispatch = EDFSTAR_public_dispatch; |
||
701 | lev->l.public_epilogue = EDFSTAR_public_epilogue; |
||
702 | lev->l.public_activate = EDFSTAR_public_activate; |
||
703 | lev->l.public_unblock = EDFSTAR_public_unblock; |
||
704 | lev->l.public_block = EDFSTAR_public_block; |
||
705 | lev->l.public_message = EDFSTAR_public_message; |
||
706 | |||
707 | /* fill the EDFSTAR descriptor part */ |
||
708 | for(i=0; i<MAX_PROC; i++) { |
||
709 | lev->period[i] = 0; |
||
710 | lev->deadline_timer[i] = -1; |
||
711 | lev->flag[i] = 0; |
||
712 | lev->dline_miss[i] = 0; |
||
713 | lev->wcet_miss[i] = 0; |
||
714 | lev->nact[i] = 0; |
||
715 | lev->budget[i] = NIL; |
||
716 | lev->wcet[i] = 0; |
||
717 | } |
||
718 | |||
719 | iq_init(&lev->ready, NULL, IQUEUE_NO_PRIORITY); |
||
720 | lev->activated = NIL; |
||
721 | |||
722 | lev->scheduling_level = master; |
||
723 | |||
724 | return l; |
||
725 | } |
||
726 | |||
727 | int EDFSTAR_get_dline_miss(PID p) |
||
728 | { |
||
729 | LEVEL l = proc_table[p].task_level; |
||
730 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
731 | |||
732 | return lev->dline_miss[p]; |
||
733 | } |
||
734 | |||
735 | int EDFSTAR_get_wcet_miss(PID p) |
||
736 | { |
||
737 | LEVEL l = proc_table[p].task_level; |
||
738 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
739 | |||
740 | return lev->wcet_miss[p]; |
||
741 | } |
||
742 | |||
743 | int EDFSTAR_get_nact(PID p) |
||
744 | { |
||
745 | LEVEL l = proc_table[p].task_level; |
||
746 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
747 | |||
748 | return lev->nact[p]; |
||
749 | } |
||
750 | |||
751 | int EDFSTAR_reset_dline_miss(PID p) |
||
752 | { |
||
753 | LEVEL l = proc_table[p].task_level; |
||
754 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
755 | |||
756 | lev->dline_miss[p] = 0; |
||
757 | return 0; |
||
758 | } |
||
759 | |||
760 | int EDFSTAR_reset_wcet_miss(PID p) |
||
761 | { |
||
762 | LEVEL l = proc_table[p].task_level; |
||
763 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
764 | |||
765 | lev->wcet_miss[p] = 0; |
||
766 | return 0; |
||
767 | } |
||
768 | |||
769 | int EDFSTAR_setbudget(LEVEL l, PID p, int budget) |
||
770 | { |
||
771 | |||
772 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
773 | |||
774 | lev->budget[p] = budget; |
||
775 | |||
776 | return 0; |
||
777 | |||
778 | } |
||
779 | |||
780 | int EDFSTAR_getbudget(LEVEL l, PID p) |
||
781 | { |
||
782 | |||
783 | EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]); |
||
784 | |||
785 | return lev->budget[p]; |
||
786 | |||
787 | } |