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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 <string.h>
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10 #include <malloc.h>
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11 #include <sys/time.h>
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12
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13 #include "VMS.h"
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14 #include "Queue_impl/BlockingQueue.h"
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15 #include "Histogram/Histogram.h"
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16
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17
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18 #define thdAttrs NULL
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19
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20 //===========================================================================
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21 void
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22 shutdownFn( void *dummy, VirtProcr *dummy2 );
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23
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24 SchedSlot **
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25 create_sched_slots();
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26
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27 void
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28 create_masterEnv();
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29
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30 void
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31 create_the_coreLoop_OS_threads();
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32
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33 MallocProlog *
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34 create_free_list();
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35
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36 void
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37 endOSThreadFn( void *initData, VirtProcr *animatingPr );
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38
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39 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
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40 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
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41
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42 //===========================================================================
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43
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44 /*Setup has two phases:
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45 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
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46 * the master virt procr into the work-queue, ready for first "call"
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47 * 2) Semantic layer then does its own init, which creates the seed virt
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48 * procr inside the semantic layer, ready to schedule it when
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49 * asked by the first run of the masterLoop.
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50 *
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51 *This part is bit weird because VMS really wants to be "always there", and
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52 * have applications attach and detach.. for now, this VMS is part of
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53 * the app, so the VMS system starts up as part of running the app.
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54 *
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55 *The semantic layer is isolated from the VMS internals by making the
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56 * semantic layer do setup to a state that it's ready with its
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57 * initial virt procrs, ready to schedule them to slots when the masterLoop
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58 * asks. Without this pattern, the semantic layer's setup would
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59 * have to modify slots directly to assign the initial virt-procrs, and put
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60 * them into the readyToAnimateQ itself, breaking the isolation completely.
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61 *
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62 *
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63 *The semantic layer creates the initial virt procr(s), and adds its
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64 * own environment to masterEnv, and fills in the pointers to
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65 * the requestHandler and slaveScheduler plug-in functions
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66 */
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67
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68 /*This allocates VMS data structures, populates the master VMSProc,
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69 * and master environment, and returns the master environment to the semantic
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70 * layer.
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71 */
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72 void
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73 VMS__init()
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74 {
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75 create_masterEnv();
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76 create_the_coreLoop_OS_threads();
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77 }
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78
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79 /*To initialize the sequential version, just don't create the threads
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80 */
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81 void
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82 VMS__init_Seq()
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83 {
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84 create_masterEnv();
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85 }
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86
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87 void
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88 create_masterEnv()
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89 { MasterEnv *masterEnv;
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90 VMSQueueStruc **readyToAnimateQs;
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91 int coreIdx;
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92 VirtProcr **masterVPs;
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93 SchedSlot ***allSchedSlots; //ptr to array of ptrs
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94
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95
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96 //Make the master env, which holds everything else
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97 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
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98
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99 //Very first thing put into the master env is the free-list, seeded
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100 // with a massive initial chunk of memory.
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101 //After this, all other mallocs are VMS__malloc.
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102 _VMSMasterEnv->freeListHead = VMS_ext__create_free_list();
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103
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104 //===================== Only VMS__malloc after this ====================
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105 masterEnv = _VMSMasterEnv;
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106
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107 //Make a readyToAnimateQ for each core loop
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108 readyToAnimateQs = VMS__malloc( NUM_CORES * sizeof(VMSQueueStruc *) );
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109 masterVPs = VMS__malloc( NUM_CORES * sizeof(VirtProcr *) );
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110
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111 //One array for each core, 3 in array, core's masterVP scheds all
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112 allSchedSlots = VMS__malloc( NUM_CORES * sizeof(SchedSlot *) );
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113
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114 _VMSMasterEnv->numProcrsCreated = 0; //used by create procr
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115 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
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116 {
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117 readyToAnimateQs[ coreIdx ] = makeVMSQ();
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118
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119 //Q: should give masterVP core-specific info as its init data?
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120 masterVPs[ coreIdx ] = VMS__create_procr( &masterLoop, masterEnv );
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121 masterVPs[ coreIdx ]->coreAnimatedBy = coreIdx;
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122 allSchedSlots[ coreIdx ] = create_sched_slots(); //makes for one core
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123 _VMSMasterEnv->numMasterInARow[ coreIdx ] = 0;
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124 _VMSMasterEnv->workStealingGates[ coreIdx ] = NULL;
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125 }
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126 _VMSMasterEnv->readyToAnimateQs = readyToAnimateQs;
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127 _VMSMasterEnv->masterVPs = masterVPs;
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128 _VMSMasterEnv->masterLock = UNLOCKED;
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129 _VMSMasterEnv->allSchedSlots = allSchedSlots;
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130 _VMSMasterEnv->workStealingLock = UNLOCKED;
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131
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132 //============================= MEASUREMENT STUFF ========================
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133 #ifdef MEAS__TIME_MASTER
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134
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135 _VMSMasterEnv->stats->masterTimeHist = makeHistogram( 25, 500, 800 );
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136 _VMSMasterEnv->stats->masterLockHist = makeHistogram( 25, 0, 100000 );
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137 _VMSMasterEnv->stats->createHist = makeHistogram( 25, 0, 5000 );
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138 #endif
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139 //========================================================================
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140
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141 //Aug 19, 2010: no longer need to place initial masterVP into queue
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142 // because coreLoop now controls -- animates its masterVP when no work
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143
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144
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145 //============================= MEASUREMENT STUFF ========================
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146 #ifdef STATS__TURN_ON_PROBES
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147 _VMSMasterEnv->dynIntervalProbesInfo =
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148 makePrivDynArrayOfSize( &(_VMSMasterEnv->intervalProbes), 200);
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149
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150 _VMSMasterEnv->probeNameHashTbl = makeHashTable( 1000, &VMS__free );
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151
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152 //put creation time directly into master env, for fast retrieval
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153 struct timeval timeStamp;
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154 gettimeofday( &(timeStamp), NULL);
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155 _VMSMasterEnv->createPtInSecs =
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156 timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0);
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157 #endif
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158 //========================================================================
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159
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160 }
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161
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162 SchedSlot **
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163 create_sched_slots()
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164 { SchedSlot **schedSlots;
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165 int i;
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166
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167 schedSlots = VMS__malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
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168
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169 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
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170 {
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171 schedSlots[i] = VMS__malloc( sizeof(SchedSlot) );
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172
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173 //Set state to mean "handling requests done, slot needs filling"
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174 schedSlots[i]->workIsDone = FALSE;
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175 schedSlots[i]->needsProcrAssigned = TRUE;
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176 }
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177 return schedSlots;
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178 }
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179
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180
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181 void
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182 freeSchedSlots( SchedSlot **schedSlots )
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183 { int i;
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184 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
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185 {
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186 VMS__free( schedSlots[i] );
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187 }
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188 VMS__free( schedSlots );
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189 }
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190
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191
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192 void
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193 create_the_coreLoop_OS_threads()
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194 {
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195 //========================================================================
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196 // Create the Threads
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197 int coreIdx, retCode;
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198
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199 //create the arrays used to measure TSC offsets between cores
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200 pongNums = malloc( NUM_CORES * sizeof( int ) );
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201 pingTimes = malloc( NUM_CORES * NUM_TSC_ROUND_TRIPS * sizeof( TSCount ) );
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202 pongTimes = malloc( NUM_CORES * NUM_TSC_ROUND_TRIPS * sizeof( TSCount ) );
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203
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204 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
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205 {
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206 pongNums[ coreIdx ] = 0;
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207 for( i = 0; i < NUM_TSC_ROUND_TRIPS; i++ )
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208 {
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209 pingTimes[ coreIdx * NUM_TSC_ROUND_TRIPS + i ] = (TSCount) 0;
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210 pingTimes[ coreIdx * NUM_TSC_ROUND_TRIPS + i ] = (TSCount) 0;
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211 }
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212 }
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213
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214 //Need the threads to be created suspended, and wait for a signal
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215 // before proceeding -- gives time after creating to initialize other
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216 // stuff before the coreLoops set off.
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217 _VMSMasterEnv->setupComplete = 0;
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218
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219 //Make the threads that animate the core loops
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220 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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221 { coreLoopThdParams[coreIdx] = VMS__malloc( sizeof(ThdParams) );
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222 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
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223
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224 retCode =
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225 pthread_create( &(coreLoopThdHandles[coreIdx]),
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226 thdAttrs,
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227 &coreLoop,
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228 (void *)(coreLoopThdParams[coreIdx]) );
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229 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(1);}
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230 }
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231 }
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232
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233 /*Semantic layer calls this when it want the system to start running..
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234 *
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235 *This starts the core loops running then waits for them to exit.
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236 */
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237 void
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238 VMS__start_the_work_then_wait_until_done()
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239 { int coreIdx;
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240 //Start the core loops running
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241 //===========================================================================
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242 TSCount startCount, endCount;
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243 unsigned long long count = 0, freq = 0;
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244 double runTime;
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245
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246 startCount = getTSC();
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247
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248 //tell the core loop threads that setup is complete
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249 //get lock, to lock out any threads still starting up -- they'll see
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250 // that setupComplete is true before entering while loop, and so never
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251 // wait on the condition
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252 pthread_mutex_lock( &suspendLock );
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253 _VMSMasterEnv->setupComplete = 1;
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254 pthread_mutex_unlock( &suspendLock );
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255 pthread_cond_broadcast( &suspend_cond );
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256
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257
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258 //wait for all to complete
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259 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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260 {
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261 pthread_join( coreLoopThdHandles[coreIdx], NULL );
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262 }
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263
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264 //NOTE: do not clean up VMS env here -- semantic layer has to have
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265 // a chance to clean up its environment first, then do a call to free
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266 // the Master env and rest of VMS locations
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267
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268
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269 endCount = getTSC();
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270 count = endCount - startCount;
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271
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272 runTime = (double)count / (double)TSCOUNT_FREQ;
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273
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274 printf("\n Time startup to shutdown: %f\n", runTime); fflush( stdin );
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275 }
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276
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277 /*Only difference between version with an OS thread pinned to each core and
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278 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
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279 */
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280 void
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281 VMS__start_the_work_then_wait_until_done_Seq()
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282 {
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283 //Instead of un-suspending threads, just call the one and only
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284 // core loop (sequential version), in the main thread.
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285 coreLoop_Seq( NULL );
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286
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287 }
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288
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289
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290
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291 /*Create stack, then create __cdecl structure on it and put initialData and
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292 * pointer to the new structure instance into the parameter positions on
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293 * the stack
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294 *Then put function pointer into nextInstrPt -- the stack is setup in std
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295 * call structure, so jumping to function ptr is same as a GCC generated
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296 * function call
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297 *No need to save registers on old stack frame, because there's no old
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298 * animator state to return to --
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299 *
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300 */
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301 inline VirtProcr *
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302 create_procr_helper( VirtProcr *newPr, VirtProcrFnPtr fnPtr,
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303 void *initialData, char *stackLocs )
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304 {
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305 char *stackPtr;
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306
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307 //============================= MEASUREMENT STUFF ========================
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308 #ifdef MEAS__TIME_MASTER
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309 int32 startStamp;
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310 saveLowTimeStampCountInto( startStamp );
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311 #endif
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312 //========================================================================
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313 newPr->startOfStack = stackLocs;
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314 newPr->procrID = _VMSMasterEnv->numProcrsCreated++;
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315 newPr->nextInstrPt = fnPtr;
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316 newPr->initialData = initialData;
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317 newPr->requests = NULL;
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318 newPr->schedSlot = NULL;
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319
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320 //fnPtr takes two params -- void *initData & void *animProcr
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321 //alloc stack locations, make stackPtr be the highest addr minus room
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322 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
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323 // by stackPtr, initData at stackPtr + 4 bytes, animatingPr just above
|
|
Me@22
|
324 stackPtr = ( (char *)stackLocs + VIRT_PROCR_STACK_SIZE - 0x10 );
|
|
Me@50
|
325
|
|
Me@8
|
326 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
|
|
Me@22
|
327 *( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
|
|
Me@14
|
328 *( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
|
|
Me@8
|
329 newPr->stackPtr = stackPtr; //core loop will switch to this, then
|
|
Me@8
|
330 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
|
|
Me@8
|
331
|
|
Me@48
|
332 //============================= MEASUREMENT STUFF ========================
|
|
Me@48
|
333 #ifdef MEAS__TIME_MASTER
|
|
Me@48
|
334 int32 endStamp;
|
|
Me@48
|
335 saveLowTimeStampCountInto( endStamp );
|
|
Me@48
|
336 addIntervalToHist( startStamp, endStamp,
|
|
Me@48
|
337 _VMSMasterEnv->stats->createHist );
|
|
Me@50
|
338 //============================= MEASUREMENT STUFF ========================
|
|
Me@50
|
339 #ifdef STATS__TURN_ON_PROBES
|
|
Me@50
|
340 struct timeval timeStamp;
|
|
Me@50
|
341 gettimeofday( &(timeStamp), NULL);
|
|
Me@54
|
342 newPr->createPtInSecs = timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0) -
|
|
Me@54
|
343 _VMSMasterEnv->createPtInSecs;
|
|
Me@50
|
344 #endif
|
|
Me@50
|
345 //========================================================================
|
|
Me@50
|
346
|
|
Me@8
|
347 return newPr;
|
|
Me@8
|
348 }
|
|
Me@8
|
349
|
|
Me@50
|
350 inline VirtProcr *
|
|
Me@50
|
351 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
|
|
Me@50
|
352 { VirtProcr *newPr;
|
|
Me@50
|
353 char *stackLocs;
|
|
Me@50
|
354
|
|
Me@50
|
355 newPr = VMS__malloc( sizeof(VirtProcr) );
|
|
Me@50
|
356 stackLocs = VMS__malloc( VIRT_PROCR_STACK_SIZE );
|
|
Me@50
|
357 if( stackLocs == 0 )
|
|
Me@50
|
358 { perror("VMS__malloc stack"); exit(1); }
|
|
Me@50
|
359
|
|
Me@50
|
360 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
|
|
Me@50
|
361 }
|
|
Me@50
|
362
|
|
Me@50
|
363 /* "ext" designates that it's for use outside the VMS system -- should only
|
|
Me@50
|
364 * be called from main thread or other thread -- never from code animated by
|
|
Me@50
|
365 * a VMS virtual processor.
|
|
Me@50
|
366 */
|
|
Me@50
|
367 inline VirtProcr *
|
|
Me@50
|
368 VMS_ext__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
|
|
Me@50
|
369 { VirtProcr *newPr;
|
|
Me@50
|
370 char *stackLocs;
|
|
Me@50
|
371
|
|
Me@50
|
372 newPr = malloc( sizeof(VirtProcr) );
|
|
Me@50
|
373 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
|
|
Me@50
|
374 if( stackLocs == 0 )
|
|
Me@50
|
375 { perror("malloc stack"); exit(1); }
|
|
Me@50
|
376
|
|
Me@50
|
377 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
|
|
Me@50
|
378 }
|
|
Me@50
|
379
|
|
Me@8
|
380
|
|
Me@26
|
381 /*there is a label inside this function -- save the addr of this label in
|
|
Me@0
|
382 * the callingPr struc, as the pick-up point from which to start the next
|
|
Me@0
|
383 * work-unit for that procr. If turns out have to save registers, then
|
|
Me@0
|
384 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
|
|
Me@0
|
385 * "done with work-unit" label. The procr struc is in the request in the
|
|
Me@0
|
386 * slave that animated the just-ended work-unit, so all the state is saved
|
|
Me@0
|
387 * there, and will get passed along, inside the request handler, to the
|
|
Me@0
|
388 * next work-unit for that procr.
|
|
Me@0
|
389 */
|
|
Me@8
|
390 void
|
|
Me@38
|
391 VMS__suspend_procr( VirtProcr *animatingPr )
|
|
Me@55
|
392 {
|
|
Me@0
|
393
|
|
Me@14
|
394 //The request to master will cause this suspended virt procr to get
|
|
Me@14
|
395 // scheduled again at some future point -- to resume, core loop jumps
|
|
Me@14
|
396 // to the resume point (below), which causes restore of saved regs and
|
|
Me@14
|
397 // "return" from this call.
|
|
Me@38
|
398 animatingPr->nextInstrPt = &&ResumePt;
|
|
Me@1
|
399
|
|
Me@1
|
400 //return ownership of the virt procr and sched slot to Master virt pr
|
|
Me@38
|
401 animatingPr->schedSlot->workIsDone = TRUE;
|
|
Me@1
|
402
|
|
Me@41
|
403 //=========================== Measurement stuff ========================
|
|
Me@38
|
404 #ifdef MEAS__TIME_STAMP_SUSP
|
|
Me@41
|
405 //record time stamp: compare to time-stamp recorded below
|
|
Me@38
|
406 saveLowTimeStampCountInto( animatingPr->preSuspTSCLow );
|
|
Me@38
|
407 #endif
|
|
Me@41
|
408 //=======================================================================
|
|
Me@38
|
409
|
|
Me@1
|
410
|
|
Me@55
|
411 SwitchToCoreLoop( animatingPr )
|
|
Me@55
|
412
|
|
Me@55
|
413 //=======================================================================
|
|
Me@1
|
414 ResumePt:
|
|
Me@38
|
415 #ifdef MEAS__TIME_STAMP_SUSP
|
|
Me@41
|
416 //NOTE: only take low part of count -- do sanity check when take diff
|
|
Me@38
|
417 saveLowTimeStampCountInto( animatingPr->postSuspTSCLow );
|
|
Me@38
|
418 #endif
|
|
Me@38
|
419
|
|
Me@0
|
420 return;
|
|
Me@0
|
421 }
|
|
Me@0
|
422
|
|
Me@22
|
423
|
|
Me@22
|
424
|
|
Me@50
|
425 /*For this implementation of VMS, it may not make much sense to have the
|
|
Me@50
|
426 * system of requests for creating a new processor done this way.. but over
|
|
Me@50
|
427 * the scope of single-master, multi-master, mult-tasking, OS-implementing,
|
|
Me@50
|
428 * distributed-memory, and so on, this gives VMS implementation a chance to
|
|
Me@50
|
429 * do stuff before suspend, in the AppVP, and in the Master before the plugin
|
|
Me@50
|
430 * is called, as well as in the lang-lib before this is called, and in the
|
|
Me@50
|
431 * plugin. So, this gives both VMS and language implementations a chance to
|
|
Me@50
|
432 * intercept at various points and do order-dependent stuff.
|
|
Me@50
|
433 *Having a standard VMSNewPrReqData struc allows the language to create and
|
|
Me@50
|
434 * free the struc, while VMS knows how to get the newPr if it wants it, and
|
|
Me@50
|
435 * it lets the lang have lang-specific data related to creation transported
|
|
Me@50
|
436 * to the plugin.
|
|
Me@50
|
437 */
|
|
Me@50
|
438 void
|
|
Me@50
|
439 VMS__send_create_procr_req( void *semReqData, VirtProcr *reqstingPr )
|
|
Me@50
|
440 { VMSReqst req;
|
|
Me@50
|
441
|
|
Me@50
|
442 req.reqType = createReq;
|
|
Me@50
|
443 req.semReqData = semReqData;
|
|
Me@50
|
444 req.nextReqst = reqstingPr->requests;
|
|
Me@50
|
445 reqstingPr->requests = &req;
|
|
Me@50
|
446
|
|
Me@50
|
447 VMS__suspend_procr( reqstingPr );
|
|
Me@50
|
448 }
|
|
Me@50
|
449
|
|
Me@22
|
450
|
|
Me@38
|
451 /*
|
|
Me@22
|
452 *This adds a request to dissipate, then suspends the processor so that the
|
|
Me@22
|
453 * request handler will receive the request. The request handler is what
|
|
Me@22
|
454 * does the work of freeing memory and removing the processor from the
|
|
Me@22
|
455 * semantic environment's data structures.
|
|
Me@22
|
456 *The request handler also is what figures out when to shutdown the VMS
|
|
Me@22
|
457 * system -- which causes all the core loop threads to die, and returns from
|
|
Me@22
|
458 * the call that started up VMS to perform the work.
|
|
Me@22
|
459 *
|
|
Me@22
|
460 *This form is a bit misleading to understand if one is trying to figure out
|
|
Me@22
|
461 * how VMS works -- it looks like a normal function call, but inside it
|
|
Me@22
|
462 * sends a request to the request handler and suspends the processor, which
|
|
Me@22
|
463 * jumps out of the VMS__dissipate_procr function, and out of all nestings
|
|
Me@22
|
464 * above it, transferring the work of dissipating to the request handler,
|
|
Me@22
|
465 * which then does the actual work -- causing the processor that animated
|
|
Me@22
|
466 * the call of this function to disappear and the "hanging" state of this
|
|
Me@22
|
467 * function to just poof into thin air -- the virtual processor's trace
|
|
Me@22
|
468 * never returns from this call, but instead the virtual processor's trace
|
|
Me@22
|
469 * gets suspended in this call and all the virt processor's state disap-
|
|
Me@22
|
470 * pears -- making that suspend the last thing in the virt procr's trace.
|
|
Me@8
|
471 */
|
|
Me@8
|
472 void
|
|
Me@53
|
473 VMS__send_dissipate_req( VirtProcr *procrToDissipate )
|
|
Me@50
|
474 { VMSReqst req;
|
|
Me@22
|
475
|
|
Me@50
|
476 req.reqType = dissipate;
|
|
Me@50
|
477 req.nextReqst = procrToDissipate->requests;
|
|
Me@50
|
478 procrToDissipate->requests = &req;
|
|
Me@50
|
479
|
|
Me@22
|
480 VMS__suspend_procr( procrToDissipate );
|
|
Me@50
|
481 }
|
|
Me@50
|
482
|
|
Me@50
|
483
|
|
Me@50
|
484 /* "ext" designates that it's for use outside the VMS system -- should only
|
|
Me@50
|
485 * be called from main thread or other thread -- never from code animated by
|
|
Me@50
|
486 * a VMS virtual processor.
|
|
Me@50
|
487 *
|
|
Me@50
|
488 *Use this version to dissipate VPs created outside the VMS system.
|
|
Me@50
|
489 */
|
|
Me@50
|
490 void
|
|
Me@50
|
491 VMS_ext__dissipate_procr( VirtProcr *procrToDissipate )
|
|
Me@50
|
492 {
|
|
Me@50
|
493 //NOTE: initialData was given to the processor, so should either have
|
|
Me@50
|
494 // been alloc'd with VMS__malloc, or freed by the level above animPr.
|
|
Me@50
|
495 //So, all that's left to free here is the stack and the VirtProcr struc
|
|
Me@50
|
496 // itself
|
|
Me@50
|
497 //Note, should not stack-allocate initial data -- no guarantee, in
|
|
Me@50
|
498 // general that creating processor will outlive ones it creates.
|
|
Me@50
|
499 free( procrToDissipate->startOfStack );
|
|
Me@50
|
500 free( procrToDissipate );
|
|
Me@50
|
501 }
|
|
Me@50
|
502
|
|
Me@22
|
503
|
|
Me@22
|
504
|
|
Me@53
|
505 /*This call's name indicates that request is malloc'd -- so req handler
|
|
Me@53
|
506 * has to free any extra requests tacked on before a send, using this.
|
|
Me@53
|
507 *
|
|
Me@53
|
508 * This inserts the semantic-layer's request data into standard VMS carrier
|
|
Me@53
|
509 * request data-struct that is mallocd. The sem request doesn't need to
|
|
Me@53
|
510 * be malloc'd if this is called inside the same call chain before the
|
|
Me@53
|
511 * send of the last request is called.
|
|
Me@53
|
512 *
|
|
Me@53
|
513 *The request handler has to call VMS__free_VMSReq for any of these
|
|
Me@22
|
514 */
|
|
Me@22
|
515 inline void
|
|
Me@53
|
516 VMS__add_sem_request_in_mallocd_VMSReqst( void *semReqData,
|
|
Me@53
|
517 VirtProcr *callingPr )
|
|
Me@53
|
518 { VMSReqst *req;
|
|
Me@22
|
519
|
|
Me@53
|
520 req = VMS__malloc( sizeof(VMSReqst) );
|
|
Me@53
|
521 req->reqType = semantic;
|
|
Me@53
|
522 req->semReqData = semReqData;
|
|
Me@53
|
523 req->nextReqst = callingPr->requests;
|
|
Me@53
|
524 callingPr->requests = req;
|
|
Me@22
|
525 }
|
|
Me@22
|
526
|
|
Me@50
|
527 /*This inserts the semantic-layer's request data into standard VMS carrier
|
|
Me@50
|
528 * request data-struct is allocated on stack of this call & ptr to it sent
|
|
Me@50
|
529 * to plugin
|
|
Me@50
|
530 *Then it does suspend, to cause request to be sent.
|
|
Me@50
|
531 */
|
|
Me@50
|
532 inline void
|
|
Me@50
|
533 VMS__send_sem_request( void *semReqData, VirtProcr *callingPr )
|
|
Me@50
|
534 { VMSReqst req;
|
|
Me@22
|
535
|
|
Me@50
|
536 req.reqType = semantic;
|
|
Me@50
|
537 req.semReqData = semReqData;
|
|
Me@50
|
538 req.nextReqst = callingPr->requests;
|
|
Me@50
|
539 callingPr->requests = &req;
|
|
Me@50
|
540
|
|
Me@50
|
541 VMS__suspend_procr( callingPr );
|
|
Me@50
|
542 }
|
|
Me@50
|
543
|
|
Me@50
|
544
|
|
Me@50
|
545 inline void
|
|
Me@50
|
546 VMS__send_VMSSem_request( void *semReqData, VirtProcr *callingPr )
|
|
Me@50
|
547 { VMSReqst req;
|
|
Me@50
|
548
|
|
Me@50
|
549 req.reqType = VMSSemantic;
|
|
Me@50
|
550 req.semReqData = semReqData;
|
|
Me@50
|
551 req.nextReqst = callingPr->requests; //gab any other preceeding
|
|
Me@50
|
552 callingPr->requests = &req;
|
|
Me@50
|
553
|
|
Me@50
|
554 VMS__suspend_procr( callingPr );
|
|
Me@50
|
555 }
|
|
Me@50
|
556
|
|
Me@50
|
557
|
|
Me@50
|
558 /*
|
|
Me@38
|
559 */
|
|
Me@24
|
560 VMSReqst *
|
|
Me@50
|
561 VMS__take_next_request_out_of( VirtProcr *procrWithReq )
|
|
Me@31
|
562 { VMSReqst *req;
|
|
Me@31
|
563
|
|
Me@31
|
564 req = procrWithReq->requests;
|
|
Me@38
|
565 if( req == NULL ) return NULL;
|
|
Me@31
|
566
|
|
Me@31
|
567 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@50
|
568 return req;
|
|
Me@24
|
569 }
|
|
Me@22
|
570
|
|
Me@24
|
571
|
|
Me@24
|
572 inline void *
|
|
Me@24
|
573 VMS__take_sem_reqst_from( VMSReqst *req )
|
|
Me@24
|
574 {
|
|
Me@24
|
575 return req->semReqData;
|
|
Me@24
|
576 }
|
|
Me@24
|
577
|
|
Me@24
|
578
|
|
Me@24
|
579
|
|
Me@50
|
580 /* This is for OS requests and VMS infrastructure requests, such as to create
|
|
Me@50
|
581 * a probe -- a probe is inside the heart of VMS-core, it's not part of any
|
|
Me@50
|
582 * language -- but it's also a semantic thing that's triggered from and used
|
|
Me@50
|
583 * in the application.. so it crosses abstractions.. so, need some special
|
|
Me@50
|
584 * pattern here for handling such requests.
|
|
Me@52
|
585 * Doing this just like it were a second language sharing VMS-core.
|
|
Me@52
|
586 *
|
|
Me@50
|
587 * This is called from the language's request handler when it sees a request
|
|
Me@50
|
588 * of type VMSSemReq
|
|
Me@52
|
589 *
|
|
Me@52
|
590 * TODO: Later change this, to give probes their own separate plugin & have
|
|
Me@52
|
591 * VMS-core steer the request to appropriate plugin
|
|
Me@52
|
592 * Do the same for OS calls -- look later at it..
|
|
Me@50
|
593 */
|
|
Me@50
|
594 void inline
|
|
Me@50
|
595 VMS__handle_VMSSemReq( VMSReqst *req, VirtProcr *requestingPr, void *semEnv,
|
|
Me@50
|
596 ResumePrFnPtr resumePrFnPtr )
|
|
Me@50
|
597 { VMSSemReq *semReq;
|
|
Me@50
|
598 IntervalProbe *newProbe;
|
|
Me@50
|
599 int32 nameLen;
|
|
Me@24
|
600
|
|
Me@50
|
601 semReq = req->semReqData;
|
|
Me@24
|
602
|
|
Me@50
|
603 newProbe = VMS__malloc( sizeof(IntervalProbe) );
|
|
Me@50
|
604 nameLen = strlen( semReq->nameStr );
|
|
Me@50
|
605 newProbe->nameStr = VMS__malloc( nameLen );
|
|
Me@50
|
606 memcpy( newProbe->nameStr, semReq->nameStr, nameLen );
|
|
Me@50
|
607 newProbe->hist = NULL;
|
|
Me@50
|
608 newProbe->schedChoiceWasRecorded = FALSE;
|
|
Me@53
|
609
|
|
Me@53
|
610 //This runs in masterVP, so no race-condition worries
|
|
Me@50
|
611 newProbe->probeID =
|
|
Me@50
|
612 addToDynArray( newProbe, _VMSMasterEnv->dynIntervalProbesInfo );
|
|
Me@50
|
613
|
|
Me@53
|
614 requestingPr->dataRetFromReq = newProbe;
|
|
Me@50
|
615
|
|
Me@50
|
616 (*resumePrFnPtr)( requestingPr, semEnv );
|
|
Me@22
|
617 }
|
|
Me@22
|
618
|
|
Me@22
|
619
|
|
Me@22
|
620
|
|
Me@24
|
621 /*This must be called by the request handler plugin -- it cannot be called
|
|
Me@24
|
622 * from the semantic library "dissipate processor" function -- instead, the
|
|
Me@50
|
623 * semantic layer has to generate a request, and the plug-in calls this
|
|
Me@24
|
624 * function.
|
|
Me@24
|
625 *The reason is that this frees the virtual processor's stack -- which is
|
|
Me@24
|
626 * still in use inside semantic library calls!
|
|
Me@24
|
627 *
|
|
Me@24
|
628 *This frees or recycles all the state owned by and comprising the VMS
|
|
Me@24
|
629 * portion of the animating virtual procr. The request handler must first
|
|
Me@24
|
630 * free any semantic data created for the processor that didn't use the
|
|
Me@24
|
631 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
|
|
Me@24
|
632 * system to disown any state that did use VMS_malloc, and then frees the
|
|
Me@24
|
633 * statck and the processor-struct itself.
|
|
Me@24
|
634 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
|
|
Me@24
|
635 * state, then that state gets freed (or sent to recycling) as a side-effect
|
|
Me@24
|
636 * of dis-owning it.
|
|
Me@24
|
637 */
|
|
Me@24
|
638 void
|
|
Me@53
|
639 VMS__dissipate_procr( VirtProcr *animatingPr )
|
|
Me@24
|
640 {
|
|
Me@24
|
641 //dis-own all locations owned by this processor, causing to be freed
|
|
Me@24
|
642 // any locations that it is (was) sole owner of
|
|
Me@29
|
643 //TODO: implement VMS__malloc system, including "give up ownership"
|
|
Me@24
|
644
|
|
Me@24
|
645
|
|
Me@24
|
646 //NOTE: initialData was given to the processor, so should either have
|
|
Me@24
|
647 // been alloc'd with VMS__malloc, or freed by the level above animPr.
|
|
Me@24
|
648 //So, all that's left to free here is the stack and the VirtProcr struc
|
|
Me@24
|
649 // itself
|
|
Me@50
|
650 //Note, should not stack-allocate initial data -- no guarantee, in
|
|
Me@50
|
651 // general that creating processor will outlive ones it creates.
|
|
Me@50
|
652 VMS__free( animatingPr->startOfStack );
|
|
Me@50
|
653 VMS__free( animatingPr );
|
|
Me@24
|
654 }
|
|
Me@24
|
655
|
|
Me@24
|
656
|
|
Me@53
|
657 //TODO: look at architecting cleanest separation between request handler
|
|
Me@29
|
658 // and master loop, for dissipate, create, shutdown, and other non-semantic
|
|
Me@29
|
659 // requests. Issue is chain: one removes requests from AppVP, one dispatches
|
|
Me@29
|
660 // on type of request, and one handles each type.. but some types require
|
|
Me@29
|
661 // action from both request handler and master loop -- maybe just give the
|
|
Me@29
|
662 // request handler calls like: VMS__handle_X_request_type
|
|
Me@24
|
663
|
|
Me@29
|
664
|
|
Me@29
|
665 /*This is called by the semantic layer's request handler when it decides its
|
|
Me@29
|
666 * time to shut down the VMS system. Calling this causes the core loop OS
|
|
Me@29
|
667 * threads to exit, which unblocks the entry-point function that started up
|
|
Me@29
|
668 * VMS, and allows it to grab the result and return to the original single-
|
|
Me@29
|
669 * threaded application.
|
|
Me@22
|
670 *
|
|
Me@29
|
671 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
|
|
Me@29
|
672 * and-wait function has to free a bunch of stuff after it detects the
|
|
Me@29
|
673 * threads have all died: the masterEnv, the thread-related locations,
|
|
Me@29
|
674 * masterVP any AppVPs that might still be allocated and sitting in the
|
|
Me@29
|
675 * semantic environment, or have been orphaned in the _VMSWorkQ.
|
|
Me@29
|
676 *
|
|
Me@53
|
677 *NOTE: the semantic plug-in is expected to use VMS__malloc to get all the
|
|
Me@29
|
678 * locations it needs, and give ownership to masterVP. Then, they will be
|
|
Me@53
|
679 * automatically freed.
|
|
Me@22
|
680 *
|
|
Me@29
|
681 *In here,create one core-loop shut-down processor for each core loop and put
|
|
Me@31
|
682 * them all directly into the readyToAnimateQ.
|
|
Me@29
|
683 *Note, this function can ONLY be called after the semantic environment no
|
|
Me@29
|
684 * longer cares if AppVPs get animated after the point this is called. In
|
|
Me@29
|
685 * other words, this can be used as an abort, or else it should only be
|
|
Me@29
|
686 * called when all AppVPs have finished dissipate requests -- only at that
|
|
Me@29
|
687 * point is it sure that all results have completed.
|
|
Me@22
|
688 */
|
|
Me@22
|
689 void
|
|
Me@53
|
690 VMS__shutdown()
|
|
Me@8
|
691 { int coreIdx;
|
|
Me@14
|
692 VirtProcr *shutDownPr;
|
|
Me@22
|
693
|
|
Me@29
|
694 //create the shutdown processors, one for each core loop -- put them
|
|
Me@31
|
695 // directly into the Q -- each core will die when gets one
|
|
Me@8
|
696 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
|
|
Me@50
|
697 { //Note, this is running in the master
|
|
Me@29
|
698 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
|
|
Me@55
|
699 writeVMSQ( shutDownPr, _VMSMasterEnv->readyToAnimateQs[coreIdx] );
|
|
Me@8
|
700 }
|
|
Me@22
|
701
|
|
Me@12
|
702 }
|
|
Me@12
|
703
|
|
Me@12
|
704
|
|
Me@29
|
705 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
|
|
Me@29
|
706 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
|
|
Me@29
|
707 *This function has the sole purpose of setting the stack and framePtr
|
|
Me@29
|
708 * to the coreLoop's stack and framePtr.. it does that then jumps to the
|
|
Me@29
|
709 * core loop's shutdown point -- might be able to just call Pthread_exit
|
|
Me@30
|
710 * from here, but am going back to the pthread's stack and setting everything
|
|
Me@29
|
711 * up just as if it never jumped out, before calling pthread_exit.
|
|
Me@29
|
712 *The end-point of core loop will free the stack and so forth of the
|
|
Me@29
|
713 * processor that animates this function, (this fn is transfering the
|
|
Me@29
|
714 * animator of the AppVP that is in turn animating this function over
|
|
Me@29
|
715 * to core loop function -- note that this slices out a level of virtual
|
|
Me@29
|
716 * processors).
|
|
Me@29
|
717 */
|
|
Me@29
|
718 void
|
|
Me@29
|
719 endOSThreadFn( void *initData, VirtProcr *animatingPr )
|
|
Me@29
|
720 { void *jmpPt, *coreLoopStackPtr, *coreLoopFramePtr;
|
|
Me@29
|
721
|
|
Me@29
|
722 jmpPt = _VMSMasterEnv->coreLoopEndPt;
|
|
Me@29
|
723 coreLoopStackPtr = animatingPr->coreLoopStackPtr;
|
|
Me@29
|
724 coreLoopFramePtr = animatingPr->coreLoopFramePtr;
|
|
Me@29
|
725
|
|
Me@29
|
726
|
|
Me@29
|
727 asm volatile("movl %0, %%eax; \
|
|
Me@29
|
728 movl %1, %%esp; \
|
|
Me@29
|
729 movl %2, %%ebp; \
|
|
Me@29
|
730 jmp %%eax " \
|
|
Me@29
|
731 /* outputs */ : \
|
|
Me@29
|
732 /* inputs */ : "m" (jmpPt), "m"(coreLoopStackPtr), "m"(coreLoopFramePtr)\
|
|
Me@29
|
733 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
|
|
Me@29
|
734 );
|
|
Me@29
|
735 }
|
|
Me@29
|
736
|
|
Me@29
|
737
|
|
Me@53
|
738 /*This is called from the startup & shutdown
|
|
Me@24
|
739 */
|
|
Me@24
|
740 void
|
|
Me@53
|
741 VMS__cleanup_at_end_of_shutdown()
|
|
Me@31
|
742 {
|
|
Me@55
|
743 VMSQueueStruc **readyToAnimateQs;
|
|
Me@31
|
744 int coreIdx;
|
|
Me@31
|
745 VirtProcr **masterVPs;
|
|
Me@31
|
746 SchedSlot ***allSchedSlots; //ptr to array of ptrs
|
|
Me@31
|
747
|
|
Me@53
|
748 //All the environment data has been allocated with VMS__malloc, so just
|
|
Me@53
|
749 // free its internal big-chunk and all inside it disappear.
|
|
Me@53
|
750 /*
|
|
Me@31
|
751 readyToAnimateQs = _VMSMasterEnv->readyToAnimateQs;
|
|
Me@31
|
752 masterVPs = _VMSMasterEnv->masterVPs;
|
|
Me@31
|
753 allSchedSlots = _VMSMasterEnv->allSchedSlots;
|
|
Me@31
|
754
|
|
Me@31
|
755 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
|
|
Me@24
|
756 {
|
|
Me@55
|
757 freeVMSQ( readyToAnimateQs[ coreIdx ] );
|
|
Me@50
|
758 //master VPs were created external to VMS, so use external free
|
|
Me@53
|
759 VMS__dissipate_procr( masterVPs[ coreIdx ] );
|
|
Me@31
|
760
|
|
Me@31
|
761 freeSchedSlots( allSchedSlots[ coreIdx ] );
|
|
Me@24
|
762 }
|
|
Me@31
|
763
|
|
Me@53
|
764 VMS__free( _VMSMasterEnv->readyToAnimateQs );
|
|
Me@53
|
765 VMS__free( _VMSMasterEnv->masterVPs );
|
|
Me@53
|
766 VMS__free( _VMSMasterEnv->allSchedSlots );
|
|
Me@50
|
767
|
|
Me@50
|
768 //============================= MEASUREMENT STUFF ========================
|
|
Me@50
|
769 #ifdef STATS__TURN_ON_PROBES
|
|
Me@53
|
770 freeDynArrayDeep( _VMSMasterEnv->dynIntervalProbesInfo, &VMS__free_probe);
|
|
Me@50
|
771 #endif
|
|
Me@50
|
772 //========================================================================
|
|
Me@53
|
773 */
|
|
Me@53
|
774 //These are the only two that use system free
|
|
Me@53
|
775 VMS_ext__free_free_list( _VMSMasterEnv->freeListHead );
|
|
Me@53
|
776 free( (void *)_VMSMasterEnv );
|
|
Me@24
|
777 }
|
|
Me@24
|
778
|
|
Me@54
|
779
|
|
Me@54
|
780 //================================
|
|
Me@54
|
781
|
|
Me@54
|
782
|
|
Me@54
|
783 /*Later, improve this -- for now, just exits the application after printing
|
|
Me@54
|
784 * the error message.
|
|
Me@54
|
785 */
|
|
Me@54
|
786 void
|
|
Me@54
|
787 VMS__throw_exception( char *msgStr, VirtProcr *reqstPr, VMSExcp *excpData )
|
|
Me@54
|
788 {
|
|
Me@54
|
789 printf(msgStr);
|
|
Me@54
|
790 fflush(stdin);
|
|
Me@54
|
791 exit(1);
|
|
Me@54
|
792 }
|
|
Me@54
|
793
|
|
Me@54
|
794
|
