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1 /*
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2 * Copyright 2010 OpenSourceStewardshipFoundation
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3 *
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4 * Licensed under BSD
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <malloc.h>
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10
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11 #include "VMS.h"
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12 #include "Queue_impl/BlockingQueue.h"
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13 #include "Histogram/Histogram.h"
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14
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15
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16 #define thdAttrs NULL
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17
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18 //===========================================================================
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19 void
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20 shutdownFn( void *dummy, VirtProcr *dummy2 );
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21
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22 SchedSlot **
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23 create_sched_slots();
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24
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25 void
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26 create_masterEnv();
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27
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28 void
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29 create_the_coreLoop_OS_threads();
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30
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31 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
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32 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
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33
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34 //===========================================================================
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35
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36 /*Setup has two phases:
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37 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
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38 * the master virt procr into the work-queue, ready for first "call"
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39 * 2) Semantic layer then does its own init, which creates the seed virt
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40 * procr inside the semantic layer, ready to schedule it when
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41 * asked by the first run of the masterLoop.
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42 *
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43 *This part is bit weird because VMS really wants to be "always there", and
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44 * have applications attach and detach.. for now, this VMS is part of
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45 * the app, so the VMS system starts up as part of running the app.
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46 *
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47 *The semantic layer is isolated from the VMS internals by making the
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48 * semantic layer do setup to a state that it's ready with its
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49 * initial virt procrs, ready to schedule them to slots when the masterLoop
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50 * asks. Without this pattern, the semantic layer's setup would
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51 * have to modify slots directly to assign the initial virt-procrs, and put
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52 * them into the readyToAnimateQ itself, breaking the isolation completely.
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53 *
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54 *
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55 *The semantic layer creates the initial virt procr(s), and adds its
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56 * own environment to masterEnv, and fills in the pointers to
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57 * the requestHandler and slaveScheduler plug-in functions
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58 */
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59
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60 /*This allocates VMS data structures, populates the master VMSProc,
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61 * and master environment, and returns the master environment to the semantic
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62 * layer.
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63 */
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64 void
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65 VMS__init()
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66 {
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67 create_masterEnv();
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68 create_the_coreLoop_OS_threads();
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69 }
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70
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71 /*To initialize the sequential version, just don't create the threads
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72 */
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73 void
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74 VMS__init_Seq()
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75 {
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76 create_masterEnv();
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77 }
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78
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79 void
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80 create_masterEnv()
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81 { MasterEnv *masterEnv;
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82 SRSWQueueStruc **readyToAnimateQs;
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83 int coreIdx;
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84 VirtProcr **masterVPs;
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85 SchedSlot ***allSchedSlots; //ptr to array of ptrs
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86
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87 //Make the master env, which holds everything else
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88 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
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89 masterEnv = _VMSMasterEnv;
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90 //Need to set start pt here 'cause used by seed procr, which is created
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91 // before the first core loop starts up. -- not sure how yet..
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92 // masterEnv->coreLoopStartPt = ;
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93 // masterEnv->coreLoopEndPt = ;
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94
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95 //Make a readyToAnimateQ for each core loop
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96 readyToAnimateQs = malloc( NUM_CORES * sizeof(SRSWQueueStruc *) );
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97 masterVPs = malloc( NUM_CORES * sizeof(VirtProcr *) );
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98
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99 //One array for each core, 3 in array, core's masterVP scheds all
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100 allSchedSlots = malloc( NUM_CORES * sizeof(SchedSlot *) );
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101
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102 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
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103 {
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104 readyToAnimateQs[ coreIdx ] = makeSRSWQ();
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105
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106 //Q: should give masterVP core-specific into as its init data?
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107 masterVPs[ coreIdx ] = VMS__create_procr( &masterLoop, masterEnv );
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108 masterVPs[ coreIdx ]->coreAnimatedBy = coreIdx;
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109 allSchedSlots[ coreIdx ] = create_sched_slots(); //makes for one core
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110 }
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111 _VMSMasterEnv->readyToAnimateQs = readyToAnimateQs;
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112 _VMSMasterEnv->masterVPs = masterVPs;
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113 _VMSMasterEnv->allSchedSlots = allSchedSlots;
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114
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115
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116
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117 //Aug 19, 2010: no longer need to place initial masterVP into queue
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118 // because coreLoop now controls -- animates its masterVP when no work
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119
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120
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121 //==================== malloc substitute ========================
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122 //
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123 //Testing whether malloc is using thread-local storage and therefore
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124 // causing unreliable behavior.
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125 //Just allocate a massive chunk of memory and roll own malloc/free and
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126 // make app use VMS__malloc_to, which will suspend and perform malloc
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127 // in the master, taking from this massive chunk.
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128
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129 // initFreeList();
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130
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131 //============================= MEASUREMENT STUFF ========================
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132 #ifdef MEAS__TIME_STAMP_SUSP
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133 _VMSMasterEnv->measSuspHist = makeHistogram( 25, 110, 135 );
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134 #endif
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135
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136 #ifdef MEAS__TIME_MASTER
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137 _VMSMasterEnv->measMasterHist = makeHistogram( 25, 500, 800 );
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138 #endif
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139 //========================================================================
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140
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141 }
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142
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143 /*
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144 void
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145 initMasterMalloc()
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146 {
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147 _VMSMasterEnv->mallocChunk = malloc( MASSIVE_MALLOC_SIZE );
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148
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149 //The free-list element is the first several locations of an
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150 // allocated chunk -- the address given to the application is pre-
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151 // pended with both the ownership structure and the free-list struc.
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152 //So, write the values of these into the first locations of
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153 // mallocChunk -- which marks it as free & puts in its size.
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154 listElem = (FreeListElem *)_VMSMasterEnv->mallocChunk;
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155 listElem->size = MASSIVE_MALLOC_SIZE - NUM_PREPEND_BYTES
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156 listElem->next = NULL;
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157 }
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158
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159 void
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160 dissipateMasterMalloc()
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161 {
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162 //Just foo code -- to get going -- doing as if free list were link-list
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163 currElem = _VMSMasterEnv->freeList;
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164 while( currElem != NULL )
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165 {
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166 nextElem = currElem->next;
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167 masterFree( currElem );
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168 currElem = nextElem;
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169 }
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170 free( _VMSMasterEnv->freeList );
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171 }
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172 */
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173
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174 SchedSlot **
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175 create_sched_slots()
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176 { SchedSlot **schedSlots;
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177 int i;
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178
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179 schedSlots = malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
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180
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181 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
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182 {
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183 schedSlots[i] = malloc( sizeof(SchedSlot) );
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184
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185 //Set state to mean "handling requests done, slot needs filling"
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186 schedSlots[i]->workIsDone = FALSE;
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187 schedSlots[i]->needsProcrAssigned = TRUE;
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188 }
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189 return schedSlots;
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190 }
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191
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192
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193 void
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194 freeSchedSlots( SchedSlot **schedSlots )
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195 { int i;
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196 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
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197 {
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198 free( schedSlots[i] );
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199 }
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200 free( schedSlots );
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201 }
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202
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203
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204 void
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205 create_the_coreLoop_OS_threads()
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206 {
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207 //========================================================================
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208 // Create the Threads
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209 int coreIdx, retCode;
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210
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211 //Need the threads to be created suspended, and wait for a signal
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212 // before proceeding -- gives time after creating to initialize other
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213 // stuff before the coreLoops set off.
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214 _VMSMasterEnv->setupComplete = 0;
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215
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216 //Make the threads that animate the core loops
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217 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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218 { coreLoopThdParams[coreIdx] = malloc( sizeof(ThdParams) );
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219 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
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220
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221 retCode =
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222 pthread_create( &(coreLoopThdHandles[coreIdx]),
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223 thdAttrs,
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224 &coreLoop,
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225 (void *)(coreLoopThdParams[coreIdx]) );
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226 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(0);}
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227 }
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228 }
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229
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230 /*Semantic layer calls this when it want the system to start running..
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231 *
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232 *This starts the core loops running then waits for them to exit.
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233 */
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234 void
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235 VMS__start_the_work_then_wait_until_done()
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236 { int coreIdx;
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237 //Start the core loops running
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238 //===========================================================================
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239 TSCount startCount, endCount;
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240 unsigned long long count = 0, freq = 0;
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241 double runTime;
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242
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243 startCount = getTSCount();
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244
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245 //tell the core loop threads that setup is complete
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246 //get lock, to lock out any threads still starting up -- they'll see
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247 // that setupComplete is true before entering while loop, and so never
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248 // wait on the condition
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249 pthread_mutex_lock( &suspendLock );
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250 _VMSMasterEnv->setupComplete = 1;
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251 pthread_mutex_unlock( &suspendLock );
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252 pthread_cond_broadcast( &suspend_cond );
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253
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254
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255 //wait for all to complete
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256 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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257 {
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258 pthread_join( coreLoopThdHandles[coreIdx], NULL );
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259 }
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260
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261 //NOTE: do not clean up VMS env here -- semantic layer has to have
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262 // a chance to clean up its environment first, then do a call to free
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263 // the Master env and rest of VMS locations
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264
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265
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266 endCount = getTSCount();
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267 count = endCount - startCount;
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268
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269 runTime = (double)count / (double)TSCOUNT_FREQ;
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270
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271 printf("\n Time startup to shutdown: %f\n", runTime); fflush( stdin );
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272 }
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273
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274 /*Only difference between version with an OS thread pinned to each core and
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275 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
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276 */
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277 void
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278 VMS__start_the_work_then_wait_until_done_Seq()
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279 {
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280 //Instead of un-suspending threads, just call the one and only
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281 // core loop (sequential version), in the main thread.
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282 coreLoop_Seq( NULL );
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283
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284 }
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285
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286
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287
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288 /*Create stack, then create __cdecl structure on it and put initialData and
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289 * pointer to the new structure instance into the parameter positions on
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290 * the stack
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291 *Then put function pointer into nextInstrPt -- the stack is setup in std
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292 * call structure, so jumping to function ptr is same as a GCC generated
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293 * function call
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294 *No need to save registers on old stack frame, because there's no old
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295 * animator state to return to --
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296 *
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297 */
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298 VirtProcr *
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299 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
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300 { VirtProcr *newPr;
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301 char *stackLocs, *stackPtr;
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302
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303 newPr = malloc( sizeof(VirtProcr) );
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304 newPr->procrID = numProcrsCreated++;
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305 newPr->nextInstrPt = fnPtr;
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306 newPr->initialData = initialData;
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307 newPr->requests = NULL;
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308 newPr->schedSlot = NULL;
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309 // newPr->coreLoopStartPt = _VMSMasterEnv->coreLoopStartPt;
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310
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311 //fnPtr takes two params -- void *initData & void *animProcr
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312 //alloc stack locations, make stackPtr be the highest addr minus room
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313 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
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314 // by stackPtr, initData at stackPtr + 4 bytes, animatingPr just above
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315 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
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316 if(stackLocs == 0)
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317 {perror("malloc stack"); exit(1);}
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318 newPr->startOfStack = stackLocs;
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319 stackPtr = ( (char *)stackLocs + VIRT_PROCR_STACK_SIZE - 0x10 );
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320 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
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321 *( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
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322 *( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
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323 newPr->stackPtr = stackPtr; //core loop will switch to this, then
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324 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
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325
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326 return newPr;
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327 }
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Me@8
|
328
|
|
Me@8
|
329
|
|
Me@26
|
330 /*there is a label inside this function -- save the addr of this label in
|
|
Me@0
|
331 * the callingPr struc, as the pick-up point from which to start the next
|
|
Me@0
|
332 * work-unit for that procr. If turns out have to save registers, then
|
|
Me@0
|
333 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
|
|
Me@0
|
334 * "done with work-unit" label. The procr struc is in the request in the
|
|
Me@0
|
335 * slave that animated the just-ended work-unit, so all the state is saved
|
|
Me@0
|
336 * there, and will get passed along, inside the request handler, to the
|
|
Me@0
|
337 * next work-unit for that procr.
|
|
Me@0
|
338 */
|
|
Me@8
|
339 void
|
|
Me@38
|
340 VMS__suspend_procr( VirtProcr *animatingPr )
|
|
Me@14
|
341 { void *jmpPt, *stackPtrAddr, *framePtrAddr, *coreLoopStackPtr;
|
|
Me@14
|
342 void *coreLoopFramePtr;
|
|
Me@0
|
343
|
|
Me@14
|
344 //The request to master will cause this suspended virt procr to get
|
|
Me@14
|
345 // scheduled again at some future point -- to resume, core loop jumps
|
|
Me@14
|
346 // to the resume point (below), which causes restore of saved regs and
|
|
Me@14
|
347 // "return" from this call.
|
|
Me@38
|
348 animatingPr->nextInstrPt = &&ResumePt;
|
|
Me@1
|
349
|
|
Me@1
|
350 //return ownership of the virt procr and sched slot to Master virt pr
|
|
Me@38
|
351 animatingPr->schedSlot->workIsDone = TRUE;
|
|
Me@14
|
352 // coreIdx = callingPr->coreAnimatedBy;
|
|
Me@1
|
353
|
|
Me@38
|
354 stackPtrAddr = &(animatingPr->stackPtr);
|
|
Me@38
|
355 framePtrAddr = &(animatingPr->framePtr);
|
|
Me@26
|
356
|
|
Me@31
|
357 jmpPt = _VMSMasterEnv->coreLoopStartPt;
|
|
Me@38
|
358 coreLoopFramePtr = animatingPr->coreLoopFramePtr;//need this only
|
|
Me@38
|
359 coreLoopStackPtr = animatingPr->coreLoopStackPtr;//safety
|
|
Me@1
|
360
|
|
Me@26
|
361 //Save the virt procr's stack and frame ptrs,
|
|
Me@18
|
362 asm volatile("movl %0, %%eax; \
|
|
Me@18
|
363 movl %%esp, (%%eax); \
|
|
Me@18
|
364 movl %1, %%eax; \
|
|
Me@26
|
365 movl %%ebp, (%%eax) "\
|
|
Me@26
|
366 /* outputs */ : "=g" (stackPtrAddr), "=g" (framePtrAddr) \
|
|
Me@26
|
367 /* inputs */ : \
|
|
Me@26
|
368 /* clobber */ : "%eax" \
|
|
Me@26
|
369 );
|
|
Me@26
|
370
|
|
Me@38
|
371 #ifdef MEAS__TIME_STAMP_SUSP
|
|
Me@38
|
372 //record time stamp into animating procr: compared to time-stamp
|
|
Me@38
|
373 // recorded below, at the resume pt.
|
|
Me@38
|
374 //NOTE: doing minimal work here 'cause only a few instrs executed in
|
|
Me@38
|
375 // core loop, so only using bottom half of time-stamp -- have to
|
|
Me@38
|
376 // externally do sanity check & throw out absurd values due to rollover
|
|
Me@38
|
377
|
|
Me@38
|
378 saveLowTimeStampCountInto( animatingPr->preSuspTSCLow );
|
|
Me@38
|
379 #endif
|
|
Me@38
|
380
|
|
Me@26
|
381 //restore coreloop's frame ptr, then jump back to "start" of core loop
|
|
Me@26
|
382 //Note, GCC compiles to assembly that saves esp and ebp in the stack
|
|
Me@26
|
383 // frame -- so have to explicitly do assembly that saves to memory
|
|
Me@26
|
384 asm volatile("movl %0, %%eax; \
|
|
Me@26
|
385 movl %1, %%esp; \
|
|
Me@26
|
386 movl %2, %%ebp; \
|
|
Me@18
|
387 jmp %%eax " \
|
|
Me@26
|
388 /* outputs */ : \
|
|
Me@26
|
389 /* inputs */ : "m" (jmpPt), "m"(coreLoopStackPtr), "m"(coreLoopFramePtr)\
|
|
Me@18
|
390 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
|
|
Me@12
|
391 ); //list everything as clobbered to force GCC to save all
|
|
Me@12
|
392 // live vars that are in regs on stack before this
|
|
Me@12
|
393 // assembly, so that stack pointer is correct, before jmp
|
|
Me@1
|
394
|
|
Me@1
|
395 ResumePt:
|
|
Me@38
|
396 #ifdef MEAS__TIME_STAMP_SUSP
|
|
Me@38
|
397 saveLowTimeStampCountInto( animatingPr->postSuspTSCLow );
|
|
Me@38
|
398 //Take difference between the pre-suspend and post-suspend times
|
|
Me@38
|
399 // and do sanity check to see if rollover happened between
|
|
Me@38
|
400 int diff = animatingPr->postSuspTSCLow - animatingPr->preSuspTSCLow;
|
|
Me@38
|
401 if( diff > 1000000 ) diff = 0;
|
|
Me@38
|
402 addToHist( diff, _VMSMasterEnv->measSuspHist );
|
|
Me@38
|
403
|
|
Me@38
|
404 #endif
|
|
Me@38
|
405
|
|
Me@0
|
406 return;
|
|
Me@0
|
407 }
|
|
Me@0
|
408
|
|
Me@22
|
409
|
|
Me@22
|
410
|
|
Me@22
|
411
|
|
Me@38
|
412 /*
|
|
Me@22
|
413 *This adds a request to dissipate, then suspends the processor so that the
|
|
Me@22
|
414 * request handler will receive the request. The request handler is what
|
|
Me@22
|
415 * does the work of freeing memory and removing the processor from the
|
|
Me@22
|
416 * semantic environment's data structures.
|
|
Me@22
|
417 *The request handler also is what figures out when to shutdown the VMS
|
|
Me@22
|
418 * system -- which causes all the core loop threads to die, and returns from
|
|
Me@22
|
419 * the call that started up VMS to perform the work.
|
|
Me@22
|
420 *
|
|
Me@22
|
421 *This form is a bit misleading to understand if one is trying to figure out
|
|
Me@22
|
422 * how VMS works -- it looks like a normal function call, but inside it
|
|
Me@22
|
423 * sends a request to the request handler and suspends the processor, which
|
|
Me@22
|
424 * jumps out of the VMS__dissipate_procr function, and out of all nestings
|
|
Me@22
|
425 * above it, transferring the work of dissipating to the request handler,
|
|
Me@22
|
426 * which then does the actual work -- causing the processor that animated
|
|
Me@22
|
427 * the call of this function to disappear and the "hanging" state of this
|
|
Me@22
|
428 * function to just poof into thin air -- the virtual processor's trace
|
|
Me@22
|
429 * never returns from this call, but instead the virtual processor's trace
|
|
Me@22
|
430 * gets suspended in this call and all the virt processor's state disap-
|
|
Me@22
|
431 * pears -- making that suspend the last thing in the virt procr's trace.
|
|
Me@8
|
432 */
|
|
Me@8
|
433 void
|
|
Me@22
|
434 VMS__dissipate_procr( VirtProcr *procrToDissipate )
|
|
Me@22
|
435 { VMSReqst *req;
|
|
Me@22
|
436
|
|
Me@22
|
437 req = malloc( sizeof(VMSReqst) );
|
|
Me@22
|
438 // req->virtProcrFrom = callingPr;
|
|
Me@22
|
439 req->reqType = dissipate;
|
|
Me@22
|
440 req->nextReqst = procrToDissipate->requests;
|
|
Me@22
|
441 procrToDissipate->requests = req;
|
|
Me@22
|
442
|
|
Me@22
|
443 VMS__suspend_procr( procrToDissipate );
|
|
Me@22
|
444 }
|
|
Me@22
|
445
|
|
Me@22
|
446
|
|
Me@22
|
447 /*This inserts the semantic-layer's request data into standard VMS carrier
|
|
Me@22
|
448 */
|
|
Me@22
|
449 inline void
|
|
Me@24
|
450 VMS__add_sem_request( void *semReqData, VirtProcr *callingPr )
|
|
Me@22
|
451 { VMSReqst *req;
|
|
Me@22
|
452
|
|
Me@22
|
453 req = malloc( sizeof(VMSReqst) );
|
|
Me@22
|
454 // req->virtProcrFrom = callingPr;
|
|
Me@22
|
455 req->reqType = semantic;
|
|
Me@22
|
456 req->semReqData = semReqData;
|
|
Me@22
|
457 req->nextReqst = callingPr->requests;
|
|
Me@22
|
458 callingPr->requests = req;
|
|
Me@22
|
459 }
|
|
Me@22
|
460
|
|
Me@22
|
461
|
|
Me@38
|
462 /*Use this to get first request before starting request handler's loop
|
|
Me@38
|
463 */
|
|
Me@24
|
464 VMSReqst *
|
|
Me@24
|
465 VMS__take_top_request_from( VirtProcr *procrWithReq )
|
|
Me@24
|
466 { VMSReqst *req;
|
|
Me@24
|
467
|
|
Me@24
|
468 req = procrWithReq->requests;
|
|
Me@24
|
469 if( req == NULL ) return req;
|
|
Me@31
|
470
|
|
Me@24
|
471 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@24
|
472 return req;
|
|
Me@24
|
473 }
|
|
Me@24
|
474
|
|
Me@38
|
475 /*A subtle bug due to freeing then accessing "next" after freed caused this
|
|
Me@38
|
476 * form of call to be put in -- so call this at end of request handler loop
|
|
Me@38
|
477 * that iterates through the requests.
|
|
Me@38
|
478 */
|
|
Me@31
|
479 VMSReqst *
|
|
Me@31
|
480 VMS__free_top_and_give_next_request_from( VirtProcr *procrWithReq )
|
|
Me@31
|
481 { VMSReqst *req;
|
|
Me@31
|
482
|
|
Me@31
|
483 req = procrWithReq->requests;
|
|
Me@38
|
484 if( req == NULL ) return NULL;
|
|
Me@31
|
485
|
|
Me@31
|
486 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@31
|
487 VMS__free_request( req );
|
|
Me@31
|
488 return procrWithReq->requests;
|
|
Me@31
|
489 }
|
|
Me@31
|
490
|
|
Me@38
|
491
|
|
Me@38
|
492 //TODO: add a semantic-layer supplied "freer" for the semantic-data portion
|
|
Me@38
|
493 // of a request -- IE call with both a virt procr and a fn-ptr to request
|
|
Me@38
|
494 // freer (also maybe put sem request freer as a field in virt procr?)
|
|
Me@38
|
495 //MeasVMS relies right now on this only freeing VMS layer of request -- the
|
|
Me@38
|
496 // semantic portion of request is alloc'd and freed by request handler
|
|
Me@38
|
497 void
|
|
Me@38
|
498 VMS__free_request( VMSReqst *req )
|
|
Me@38
|
499 {
|
|
Me@38
|
500 free( req );
|
|
Me@38
|
501 }
|
|
Me@38
|
502
|
|
Me@38
|
503
|
|
Me@38
|
504
|
|
Me@24
|
505 inline int
|
|
Me@24
|
506 VMS__isSemanticReqst( VMSReqst *req )
|
|
Me@22
|
507 {
|
|
Me@24
|
508 return ( req->reqType == semantic );
|
|
Me@24
|
509 }
|
|
Me@22
|
510
|
|
Me@24
|
511
|
|
Me@24
|
512 inline void *
|
|
Me@24
|
513 VMS__take_sem_reqst_from( VMSReqst *req )
|
|
Me@24
|
514 {
|
|
Me@24
|
515 return req->semReqData;
|
|
Me@24
|
516 }
|
|
Me@24
|
517
|
|
Me@24
|
518 inline int
|
|
Me@24
|
519 VMS__isDissipateReqst( VMSReqst *req )
|
|
Me@24
|
520 {
|
|
Me@24
|
521 return ( req->reqType == dissipate );
|
|
Me@24
|
522 }
|
|
Me@24
|
523
|
|
Me@24
|
524 inline int
|
|
Me@24
|
525 VMS__isCreateReqst( VMSReqst *req )
|
|
Me@24
|
526 {
|
|
Me@24
|
527 return ( req->reqType == regCreated );
|
|
Me@24
|
528 }
|
|
Me@24
|
529
|
|
Me@24
|
530 void
|
|
Me@38
|
531 VMS__send_req_to_register_new_procr(VirtProcr *newPr, VirtProcr *reqstingPr)
|
|
Me@24
|
532 { VMSReqst *req;
|
|
Me@24
|
533
|
|
Me@24
|
534 req = malloc( sizeof(VMSReqst) );
|
|
Me@24
|
535 req->reqType = regCreated;
|
|
Me@24
|
536 req->semReqData = newPr;
|
|
Me@24
|
537 req->nextReqst = reqstingPr->requests;
|
|
Me@24
|
538 reqstingPr->requests = req;
|
|
Me@24
|
539
|
|
Me@24
|
540 VMS__suspend_procr( reqstingPr );
|
|
Me@22
|
541 }
|
|
Me@22
|
542
|
|
Me@22
|
543
|
|
Me@22
|
544
|
|
Me@24
|
545 /*This must be called by the request handler plugin -- it cannot be called
|
|
Me@24
|
546 * from the semantic library "dissipate processor" function -- instead, the
|
|
Me@24
|
547 * semantic layer has to generate a request for the plug-in to call this
|
|
Me@24
|
548 * function.
|
|
Me@24
|
549 *The reason is that this frees the virtual processor's stack -- which is
|
|
Me@24
|
550 * still in use inside semantic library calls!
|
|
Me@24
|
551 *
|
|
Me@24
|
552 *This frees or recycles all the state owned by and comprising the VMS
|
|
Me@24
|
553 * portion of the animating virtual procr. The request handler must first
|
|
Me@24
|
554 * free any semantic data created for the processor that didn't use the
|
|
Me@24
|
555 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
|
|
Me@24
|
556 * system to disown any state that did use VMS_malloc, and then frees the
|
|
Me@24
|
557 * statck and the processor-struct itself.
|
|
Me@24
|
558 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
|
|
Me@24
|
559 * state, then that state gets freed (or sent to recycling) as a side-effect
|
|
Me@24
|
560 * of dis-owning it.
|
|
Me@24
|
561 */
|
|
Me@24
|
562 void
|
|
Me@29
|
563 VMS__handle_dissipate_reqst( VirtProcr *animatingPr )
|
|
Me@24
|
564 {
|
|
Me@24
|
565 //dis-own all locations owned by this processor, causing to be freed
|
|
Me@24
|
566 // any locations that it is (was) sole owner of
|
|
Me@29
|
567 //TODO: implement VMS__malloc system, including "give up ownership"
|
|
Me@24
|
568
|
|
Me@24
|
569 //The dissipate request might still be attached, so remove and free it
|
|
Me@38
|
570 VMS__free_top_and_give_next_request_from( animatingPr );
|
|
Me@24
|
571
|
|
Me@24
|
572 //NOTE: initialData was given to the processor, so should either have
|
|
Me@24
|
573 // been alloc'd with VMS__malloc, or freed by the level above animPr.
|
|
Me@24
|
574 //So, all that's left to free here is the stack and the VirtProcr struc
|
|
Me@24
|
575 // itself
|
|
Me@24
|
576 free( animatingPr->startOfStack );
|
|
Me@24
|
577 free( animatingPr );
|
|
Me@24
|
578 }
|
|
Me@24
|
579
|
|
Me@24
|
580
|
|
Me@29
|
581 //TODO: re-architect so that have clean separation between request handler
|
|
Me@29
|
582 // and master loop, for dissipate, create, shutdown, and other non-semantic
|
|
Me@29
|
583 // requests. Issue is chain: one removes requests from AppVP, one dispatches
|
|
Me@29
|
584 // on type of request, and one handles each type.. but some types require
|
|
Me@29
|
585 // action from both request handler and master loop -- maybe just give the
|
|
Me@29
|
586 // request handler calls like: VMS__handle_X_request_type
|
|
Me@24
|
587
|
|
Me@29
|
588 void
|
|
Me@29
|
589 endOSThreadFn( void *initData, VirtProcr *animatingPr );
|
|
Me@29
|
590
|
|
Me@29
|
591 /*This is called by the semantic layer's request handler when it decides its
|
|
Me@29
|
592 * time to shut down the VMS system. Calling this causes the core loop OS
|
|
Me@29
|
593 * threads to exit, which unblocks the entry-point function that started up
|
|
Me@29
|
594 * VMS, and allows it to grab the result and return to the original single-
|
|
Me@29
|
595 * threaded application.
|
|
Me@22
|
596 *
|
|
Me@29
|
597 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
|
|
Me@29
|
598 * and-wait function has to free a bunch of stuff after it detects the
|
|
Me@29
|
599 * threads have all died: the masterEnv, the thread-related locations,
|
|
Me@29
|
600 * masterVP any AppVPs that might still be allocated and sitting in the
|
|
Me@29
|
601 * semantic environment, or have been orphaned in the _VMSWorkQ.
|
|
Me@29
|
602 *
|
|
Me@29
|
603 *NOTE: the semantic plug-in is expected to use VMS__malloc_to to get all the
|
|
Me@29
|
604 * locations it needs, and give ownership to masterVP. Then, they will be
|
|
Me@29
|
605 * automatically freed when the masterVP is dissipated. (This happens after
|
|
Me@29
|
606 * the core loop threads have all exited)
|
|
Me@22
|
607 *
|
|
Me@29
|
608 *In here,create one core-loop shut-down processor for each core loop and put
|
|
Me@31
|
609 * them all directly into the readyToAnimateQ.
|
|
Me@29
|
610 *Note, this function can ONLY be called after the semantic environment no
|
|
Me@29
|
611 * longer cares if AppVPs get animated after the point this is called. In
|
|
Me@29
|
612 * other words, this can be used as an abort, or else it should only be
|
|
Me@29
|
613 * called when all AppVPs have finished dissipate requests -- only at that
|
|
Me@29
|
614 * point is it sure that all results have completed.
|
|
Me@22
|
615 */
|
|
Me@22
|
616 void
|
|
Me@29
|
617 VMS__handle_shutdown_reqst( void *dummy, VirtProcr *animatingPr )
|
|
Me@8
|
618 { int coreIdx;
|
|
Me@14
|
619 VirtProcr *shutDownPr;
|
|
Me@22
|
620
|
|
Me@29
|
621 //create the shutdown processors, one for each core loop -- put them
|
|
Me@31
|
622 // directly into the Q -- each core will die when gets one
|
|
Me@8
|
623 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
|
|
Me@8
|
624 {
|
|
Me@29
|
625 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
|
|
Me@31
|
626 writeSRSWQ( shutDownPr, _VMSMasterEnv->readyToAnimateQs[coreIdx] );
|
|
Me@8
|
627 }
|
|
Me@22
|
628
|
|
Me@12
|
629 }
|
|
Me@12
|
630
|
|
Me@12
|
631
|
|
Me@29
|
632 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
|
|
Me@29
|
633 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
|
|
Me@29
|
634 *This function has the sole purpose of setting the stack and framePtr
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|
Me@29
|
635 * to the coreLoop's stack and framePtr.. it does that then jumps to the
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|
Me@29
|
636 * core loop's shutdown point -- might be able to just call Pthread_exit
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|
Me@30
|
637 * from here, but am going back to the pthread's stack and setting everything
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|
Me@29
|
638 * up just as if it never jumped out, before calling pthread_exit.
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|
Me@29
|
639 *The end-point of core loop will free the stack and so forth of the
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|
Me@29
|
640 * processor that animates this function, (this fn is transfering the
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|
Me@29
|
641 * animator of the AppVP that is in turn animating this function over
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|
Me@29
|
642 * to core loop function -- note that this slices out a level of virtual
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|
Me@29
|
643 * processors).
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Me@29
|
644 */
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|
Me@29
|
645 void
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Me@29
|
646 endOSThreadFn( void *initData, VirtProcr *animatingPr )
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|
Me@29
|
647 { void *jmpPt, *coreLoopStackPtr, *coreLoopFramePtr;
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|
Me@29
|
648
|
|
Me@29
|
649 jmpPt = _VMSMasterEnv->coreLoopEndPt;
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|
Me@29
|
650 coreLoopStackPtr = animatingPr->coreLoopStackPtr;
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|
Me@29
|
651 coreLoopFramePtr = animatingPr->coreLoopFramePtr;
|
|
Me@29
|
652
|
|
Me@29
|
653
|
|
Me@29
|
654 asm volatile("movl %0, %%eax; \
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|
Me@29
|
655 movl %1, %%esp; \
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|
Me@29
|
656 movl %2, %%ebp; \
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|
Me@29
|
657 jmp %%eax " \
|
|
Me@29
|
658 /* outputs */ : \
|
|
Me@29
|
659 /* inputs */ : "m" (jmpPt), "m"(coreLoopStackPtr), "m"(coreLoopFramePtr)\
|
|
Me@29
|
660 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
|
|
Me@29
|
661 );
|
|
Me@29
|
662 }
|
|
Me@29
|
663
|
|
Me@29
|
664
|
|
Me@31
|
665 /*This is called after the threads have shut down and control has returned
|
|
Me@30
|
666 * to the semantic layer, in the entry point function in the main thread.
|
|
Me@30
|
667 * It has to free anything allocated during VMS_init, and any other alloc'd
|
|
Me@24
|
668 * locations that might be left over.
|
|
Me@24
|
669 */
|
|
Me@24
|
670 void
|
|
Me@29
|
671 VMS__cleanup_after_shutdown()
|
|
Me@31
|
672 {
|
|
Me@31
|
673 SRSWQueueStruc **readyToAnimateQs;
|
|
Me@31
|
674 int coreIdx;
|
|
Me@31
|
675 VirtProcr **masterVPs;
|
|
Me@31
|
676 SchedSlot ***allSchedSlots; //ptr to array of ptrs
|
|
Me@31
|
677
|
|
Me@31
|
678 readyToAnimateQs = _VMSMasterEnv->readyToAnimateQs;
|
|
Me@31
|
679 masterVPs = _VMSMasterEnv->masterVPs;
|
|
Me@31
|
680 allSchedSlots = _VMSMasterEnv->allSchedSlots;
|
|
Me@31
|
681
|
|
Me@31
|
682 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
|
|
Me@24
|
683 {
|
|
Me@31
|
684 freeSRSWQ( readyToAnimateQs[ coreIdx ] );
|
|
Me@31
|
685
|
|
Me@31
|
686 VMS__handle_dissipate_reqst( masterVPs[ coreIdx ] );
|
|
Me@31
|
687
|
|
Me@31
|
688 freeSchedSlots( allSchedSlots[ coreIdx ] );
|
|
Me@24
|
689 }
|
|
Me@31
|
690
|
|
Me@31
|
691 free( _VMSMasterEnv->readyToAnimateQs );
|
|
Me@31
|
692 free( _VMSMasterEnv->masterVPs );
|
|
Me@31
|
693 free( _VMSMasterEnv->allSchedSlots );
|
|
Me@24
|
694
|
|
Me@24
|
695 free( _VMSMasterEnv );
|
|
Me@24
|
696 }
|
|
Me@24
|
697
|
|
Me@24
|
698
|
|
Me@24
|
699 //===========================================================================
|
|
Me@12
|
700
|
|
Me@12
|
701 inline TSCount getTSCount()
|
|
Me@12
|
702 { unsigned int low, high;
|
|
Me@12
|
703 TSCount out;
|
|
Me@12
|
704
|
|
Me@12
|
705 saveTimeStampCountInto( low, high );
|
|
Me@12
|
706 out = high;
|
|
Me@12
|
707 out = (out << 32) + low;
|
|
Me@12
|
708 return out;
|
|
Me@12
|
709 }
|
|
Me@12
|
710
|
