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annotate TaskManager/kernel/ppe/TaskManagerImpl.cc @ 696:b5c3ef336878

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sun, 13 Dec 2009 10:49:07 +0900
parents 7405d92733a8
children 61b59376aec5
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1 #include <stdio.h>
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2 #include "TaskManagerImpl.h"
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3 #include "types.h"
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4 #include "error.h"
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5 #include "SchedTask.h"
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6 #include "Scheduler.h"
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7 #include "SysTask.h"
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8 #include "SysFunc.h"
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9
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10 static HTaskPtr systask_start;
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11 static HTaskPtr systask_finish;
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12
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13 static void
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14 noaction(SchedTask *s, void *read, void *write)
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15 {
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16 }
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17
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18 TaskManagerImpl::TaskManagerImpl(int num)
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19 : machineNum(num) {
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20 activeTaskQueue = new HTaskInfo();
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21 waitTaskQueue = new HTaskInfo();
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22 htaskImpl = waitTaskQueue ; // any HTaskInfo
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23 taskQueueImpl = new TaskQueueInfo();
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24 }
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25
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26 /**
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27 * 一番最初に PPE で実行される systask_start
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28 */
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29 void
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30 TaskManagerImpl::systask_init()
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31 {
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32 systask_register();
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33 #ifdef SIMPLE_TASK
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34 systask_start = create_task(StartTask,0,0,0,0);
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35 systask_finish = create_task(FinishTask,0,0,0,0);
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36 #else
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37 systask_start = create_task(StartTask);
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38 systask_finish = create_task(FinishTask);
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39 #endif
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41 systask_start->spawn();
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42
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43 // すべての Task が FinishTask を wait_for すると、
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44 // あらゆる Task が FinishTask の waiting task queue を操作する
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45 // ことになる。それは、重すぎる。PPE/SPE Task が終了した時点で、
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46 // TaskManager が実行する方が安い。
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47 // append_waitTask(systask_finish);
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48 }
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50 HTaskPtr
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51 TaskManagerImpl::create_task(int cmd,memaddr rbuf, long r_size, memaddr wbuf, long w_size)
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52 {
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53 HTaskPtr new_task;
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54
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55 new_task = htaskImpl->create(cmd, rbuf, r_size, wbuf, w_size);
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56 new_task->post_func = noaction;
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57 new_task->mimpl = this;
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58
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59 return new_task;
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60 }
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62 HTaskPtr
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63 TaskManagerImpl::create_task(int cmd)
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64 {
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65 HTaskPtr new_task;
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66
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67 new_task = htaskImpl->create(cmd);
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68 new_task->post_func = noaction;
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69 new_task->mimpl = this;
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70
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71 return new_task;
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72 }
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73
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74 /**
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75 * task の依存関係を設定
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76 * master task が終わってから、slave task を実行するように
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77 * master->wait_for(slave);
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78 */
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79 void
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80 TaskManagerImpl::set_task_depend(HTaskPtr master, HTaskPtr slave)
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81 {
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82 TaskQueuePtr m, s;
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83
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84 m = taskQueueImpl->create(master);
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85 s = taskQueueImpl->create(slave);
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86
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87 master->wait_me->addLast(s);
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88 slave->wait_i->addLast(m);
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89 s->waiter = m;
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90 }
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91
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92 /**
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93 * タスクを実行可能キューまたは待機キューへ追加する。
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94 * 依存関係が満たされていれば active, まだだったら wait へ。
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95 * task->spawn();
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96 */
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97 void
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98 TaskManagerImpl::spawn_task(HTaskPtr task)
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99 {
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100 // waiter // master
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101 // waitee // slave
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102 if (task->wait_i->empty()) {
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103 append_activeTask(task);
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104 } else {
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105 append_waitTask(task);
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106 }
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107
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108 // systask_finish->wait_for(task);
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109 }
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110
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111 /**
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112 * Task を実行可能キューに追加する
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113 */
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114 void
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115 TaskManagerImpl::append_activeTask(HTaskPtr q)
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116 {
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117 activeTaskQueue->addLast(q);
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118 }
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119
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120 /**
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121 * タスクが実行する CPU を選択する
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122 *
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123 * 現在は CPU_PPE, CPU_SPE, SPE_ANY, SPE_0, SPE_1, ..., SPE_5
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124 * types.h に書いてます。
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125 */
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126 void
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127 TaskManagerImpl::set_task_cpu(HTaskPtr task, CPU_TYPE type)
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128 {
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129 if (machineNum==0)
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130 task->cpu_type = CPU_PPE ;
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131 else
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132 task->cpu_type = type;
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133 }
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134
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135 /**
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136 * 終了したタスクから依存の処理とか
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137 * post_func() はこのタスクが終了したら実行する関数。
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138 *
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139 * @param [task] 終了したタスク
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140 */
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141 void
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142 TaskManagerImpl::check_task_finish(HTaskPtr me, HTaskInfo *wait_queue)
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143 {
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144
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145 while(TaskQueue *p = me->wait_me->poll()) {
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146 HTaskPtr you = p->task;
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147 TaskQueueInfo *wait_i = you->wait_i;
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148 // 相手の wait queue から自分(を指しているTaskQueue)を削除
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149 wait_i->remove(p->waiter);
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150 // queue を free する
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151 wait_i->free_(p->waiter);
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152
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153 if (wait_i->empty()) {
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154 wait_queue->remove(you);
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155 append_activeTask(you);
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156 }
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157
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158 wait_i->free_(p);
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159 }
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160
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161 htaskImpl->free_(me);
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162 }
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163
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164
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165 void
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166 TaskManagerImpl::append_waitTask(HTaskPtr q)
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167 {
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168 waitTaskQueue ->addLast(q);
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169 }
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170
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171 /**
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172 * waitQueue の中で依存関係を満たしたタスクは
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173 * activeQueue へ移す
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174 */
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175 void
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176 TaskManagerImpl::wakeup_waitTask()
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177 {
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178 // done in check_task_finish
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179 }
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180
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181
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182 /* end */