annotate VMS.c @ 70:f9b60012fd74

working ucontext version
author Merten Sach <msach@mailbox.tu-berlin.de>
date Fri, 27 May 2011 12:35:40 +0200
parents 11bfe9d136ed
children efb55f1b5fb9
rev   line source
Me@0 1 /*
Me@38 2 * Copyright 2010 OpenSourceStewardshipFoundation
Me@0 3 *
Me@0 4 * Licensed under BSD
Me@0 5 */
Me@0 6
Me@0 7 #include <stdio.h>
Me@0 8 #include <stdlib.h>
Me@50 9 #include <string.h>
Me@0 10 #include <malloc.h>
Me@50 11 #include <sys/time.h>
Me@0 12
Me@0 13 #include "VMS.h"
Me@0 14 #include "Queue_impl/BlockingQueue.h"
Me@38 15 #include "Histogram/Histogram.h"
Me@0 16
Me@0 17
Me@26 18 #define thdAttrs NULL
Me@26 19
Me@22 20 //===========================================================================
Me@22 21 void
Me@22 22 shutdownFn( void *dummy, VirtProcr *dummy2 );
Me@22 23
Me@31 24 SchedSlot **
Me@31 25 create_sched_slots();
Me@22 26
Me@28 27 void
Me@28 28 create_masterEnv();
Me@28 29
Me@28 30 void
Me@28 31 create_the_coreLoop_OS_threads();
Me@28 32
Me@50 33 MallocProlog *
Me@50 34 create_free_list();
Me@50 35
Me@53 36 void
Me@53 37 endOSThreadFn( void *initData, VirtProcr *animatingPr );
Me@50 38
Me@26 39 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
Me@26 40 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
Me@26 41
Me@22 42 //===========================================================================
Me@22 43
Me@0 44 /*Setup has two phases:
Me@0 45 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
Me@8 46 * the master virt procr into the work-queue, ready for first "call"
Me@8 47 * 2) Semantic layer then does its own init, which creates the seed virt
Me@8 48 * procr inside the semantic layer, ready to schedule it when
Me@0 49 * asked by the first run of the masterLoop.
Me@0 50 *
Me@0 51 *This part is bit weird because VMS really wants to be "always there", and
Me@0 52 * have applications attach and detach.. for now, this VMS is part of
Me@0 53 * the app, so the VMS system starts up as part of running the app.
Me@0 54 *
Me@8 55 *The semantic layer is isolated from the VMS internals by making the
Me@8 56 * semantic layer do setup to a state that it's ready with its
Me@8 57 * initial virt procrs, ready to schedule them to slots when the masterLoop
Me@0 58 * asks. Without this pattern, the semantic layer's setup would
Me@8 59 * have to modify slots directly to assign the initial virt-procrs, and put
Me@31 60 * them into the readyToAnimateQ itself, breaking the isolation completely.
Me@0 61 *
Me@0 62 *
Me@8 63 *The semantic layer creates the initial virt procr(s), and adds its
Me@8 64 * own environment to masterEnv, and fills in the pointers to
Me@0 65 * the requestHandler and slaveScheduler plug-in functions
Me@8 66 */
Me@8 67
Me@8 68 /*This allocates VMS data structures, populates the master VMSProc,
Me@0 69 * and master environment, and returns the master environment to the semantic
Me@0 70 * layer.
Me@0 71 */
Me@8 72 void
Me@8 73 VMS__init()
Me@28 74 {
Me@28 75 create_masterEnv();
Me@28 76 create_the_coreLoop_OS_threads();
Me@28 77 }
Me@28 78
Me@28 79 /*To initialize the sequential version, just don't create the threads
Me@28 80 */
Me@28 81 void
Me@28 82 VMS__init_Seq()
Me@28 83 {
Me@28 84 create_masterEnv();
Me@28 85 }
Me@28 86
Me@28 87 void
Me@28 88 create_masterEnv()
Me@31 89 { MasterEnv *masterEnv;
Me@55 90 VMSQueueStruc **readyToAnimateQs;
Me@31 91 int coreIdx;
Me@31 92 VirtProcr **masterVPs;
Me@31 93 SchedSlot ***allSchedSlots; //ptr to array of ptrs
Me@53 94
Me@53 95
Me@31 96 //Make the master env, which holds everything else
Me@1 97 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
Me@53 98
Me@53 99 //Very first thing put into the master env is the free-list, seeded
Me@53 100 // with a massive initial chunk of memory.
Me@53 101 //After this, all other mallocs are VMS__malloc.
Me@53 102 _VMSMasterEnv->freeListHead = VMS_ext__create_free_list();
Me@53 103
Me@65 104
Me@65 105 //============================= MEASUREMENT STUFF ========================
Me@65 106 #ifdef MEAS__TIME_MALLOC
Me@68 107 _VMSMasterEnv->mallocTimeHist = makeFixedBinHistExt( 50, 0, 100,
Me@65 108 "malloc time hist");
Me@68 109 _VMSMasterEnv->freeTimeHist = makeFixedBinHistExt( 50, 0, 100,
Me@65 110 "free time hist");
Me@65 111 #endif
Me@68 112 #ifdef MEAS__TIME_PLUGIN
Me@68 113 _VMSMasterEnv->reqHdlrLowTimeHist = makeFixedBinHistExt( 50, 0, 10,
Me@68 114 "plugin low time hist");
Me@68 115 _VMSMasterEnv->reqHdlrHighTimeHist = makeFixedBinHistExt( 50, 0, 100,
Me@68 116 "plugin high time hist");
Me@68 117 #endif
Me@65 118 //========================================================================
Me@65 119
Me@53 120 //===================== Only VMS__malloc after this ====================
msach@69 121 masterEnv = (MasterEnv*)_VMSMasterEnv;
Me@31 122
Me@31 123 //Make a readyToAnimateQ for each core loop
Me@55 124 readyToAnimateQs = VMS__malloc( NUM_CORES * sizeof(VMSQueueStruc *) );
Me@53 125 masterVPs = VMS__malloc( NUM_CORES * sizeof(VirtProcr *) );
Me@0 126
Me@31 127 //One array for each core, 3 in array, core's masterVP scheds all
Me@53 128 allSchedSlots = VMS__malloc( NUM_CORES * sizeof(SchedSlot *) );
Me@0 129
Me@53 130 _VMSMasterEnv->numProcrsCreated = 0; //used by create procr
Me@31 131 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@53 132 {
Me@55 133 readyToAnimateQs[ coreIdx ] = makeVMSQ();
Me@31 134
Me@50 135 //Q: should give masterVP core-specific info as its init data?
Me@53 136 masterVPs[ coreIdx ] = VMS__create_procr( &masterLoop, masterEnv );
Me@31 137 masterVPs[ coreIdx ]->coreAnimatedBy = coreIdx;
Me@31 138 allSchedSlots[ coreIdx ] = create_sched_slots(); //makes for one core
Me@53 139 _VMSMasterEnv->numMasterInARow[ coreIdx ] = 0;
Me@55 140 _VMSMasterEnv->workStealingGates[ coreIdx ] = NULL;
Me@31 141 }
Me@31 142 _VMSMasterEnv->readyToAnimateQs = readyToAnimateQs;
Me@31 143 _VMSMasterEnv->masterVPs = masterVPs;
Me@50 144 _VMSMasterEnv->masterLock = UNLOCKED;
Me@31 145 _VMSMasterEnv->allSchedSlots = allSchedSlots;
Me@55 146 _VMSMasterEnv->workStealingLock = UNLOCKED;
Me@28 147
Me@12 148
Me@31 149 //Aug 19, 2010: no longer need to place initial masterVP into queue
Me@31 150 // because coreLoop now controls -- animates its masterVP when no work
Me@31 151
Me@30 152
Me@50 153 //============================= MEASUREMENT STUFF ========================
Me@50 154 #ifdef STATS__TURN_ON_PROBES
Me@50 155 _VMSMasterEnv->dynIntervalProbesInfo =
msach@69 156 makePrivDynArrayOfSize( (void***)&(_VMSMasterEnv->intervalProbes), 200);
Me@30 157
Me@53 158 _VMSMasterEnv->probeNameHashTbl = makeHashTable( 1000, &VMS__free );
Me@53 159
Me@53 160 //put creation time directly into master env, for fast retrieval
Me@50 161 struct timeval timeStamp;
Me@50 162 gettimeofday( &(timeStamp), NULL);
Me@50 163 _VMSMasterEnv->createPtInSecs =
Me@50 164 timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0);
Me@50 165 #endif
Me@65 166 #ifdef MEAS__TIME_MASTER_LOCK
Me@65 167 _VMSMasterEnv->masterLockLowTimeHist = makeFixedBinHist( 50, 0, 2,
Me@65 168 "master lock low time hist");
Me@68 169 _VMSMasterEnv->masterLockHighTimeHist = makeFixedBinHist( 50, 0, 100,
Me@65 170 "master lock high time hist");
Me@65 171 #endif
Me@68 172
Me@68 173 MakeTheMeasHists
Me@50 174 //========================================================================
Me@38 175
Me@0 176 }
Me@0 177
Me@31 178 SchedSlot **
Me@31 179 create_sched_slots()
Me@31 180 { SchedSlot **schedSlots;
Me@0 181 int i;
Me@0 182
Me@53 183 schedSlots = VMS__malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
Me@8 184
Me@1 185 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@0 186 {
Me@53 187 schedSlots[i] = VMS__malloc( sizeof(SchedSlot) );
Me@8 188
Me@1 189 //Set state to mean "handling requests done, slot needs filling"
Me@8 190 schedSlots[i]->workIsDone = FALSE;
Me@8 191 schedSlots[i]->needsProcrAssigned = TRUE;
Me@0 192 }
Me@31 193 return schedSlots;
Me@31 194 }
Me@31 195
Me@31 196
Me@31 197 void
Me@31 198 freeSchedSlots( SchedSlot **schedSlots )
Me@31 199 { int i;
Me@31 200 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@31 201 {
Me@53 202 VMS__free( schedSlots[i] );
Me@31 203 }
Me@53 204 VMS__free( schedSlots );
Me@0 205 }
Me@0 206
Me@8 207
Me@28 208 void
Me@28 209 create_the_coreLoop_OS_threads()
Me@28 210 {
Me@28 211 //========================================================================
Me@28 212 // Create the Threads
Me@28 213 int coreIdx, retCode;
Me@28 214
Me@28 215 //Need the threads to be created suspended, and wait for a signal
Me@28 216 // before proceeding -- gives time after creating to initialize other
Me@28 217 // stuff before the coreLoops set off.
Me@28 218 _VMSMasterEnv->setupComplete = 0;
Me@28 219
Me@28 220 //Make the threads that animate the core loops
Me@28 221 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@53 222 { coreLoopThdParams[coreIdx] = VMS__malloc( sizeof(ThdParams) );
Me@28 223 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
Me@28 224
Me@28 225 retCode =
Me@28 226 pthread_create( &(coreLoopThdHandles[coreIdx]),
Me@28 227 thdAttrs,
Me@28 228 &coreLoop,
Me@28 229 (void *)(coreLoopThdParams[coreIdx]) );
Me@50 230 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(1);}
Me@28 231 }
Me@28 232 }
Me@28 233
Me@0 234 /*Semantic layer calls this when it want the system to start running..
Me@0 235 *
Me@24 236 *This starts the core loops running then waits for them to exit.
Me@0 237 */
Me@12 238 void
Me@24 239 VMS__start_the_work_then_wait_until_done()
Me@12 240 { int coreIdx;
Me@24 241 //Start the core loops running
Me@25 242
Me@25 243 //tell the core loop threads that setup is complete
Me@25 244 //get lock, to lock out any threads still starting up -- they'll see
Me@25 245 // that setupComplete is true before entering while loop, and so never
Me@25 246 // wait on the condition
Me@26 247 pthread_mutex_lock( &suspendLock );
Me@25 248 _VMSMasterEnv->setupComplete = 1;
Me@26 249 pthread_mutex_unlock( &suspendLock );
Me@26 250 pthread_cond_broadcast( &suspend_cond );
Me@25 251
Me@25 252
Me@24 253 //wait for all to complete
Me@8 254 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@8 255 {
Me@25 256 pthread_join( coreLoopThdHandles[coreIdx], NULL );
Me@24 257 }
Me@25 258
Me@24 259 //NOTE: do not clean up VMS env here -- semantic layer has to have
Me@24 260 // a chance to clean up its environment first, then do a call to free
Me@24 261 // the Master env and rest of VMS locations
Me@8 262 }
Me@0 263
msach@70 264 #ifdef SEQUENTIAL
Me@28 265 /*Only difference between version with an OS thread pinned to each core and
Me@28 266 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
Me@28 267 */
Me@28 268 void
Me@28 269 VMS__start_the_work_then_wait_until_done_Seq()
Me@28 270 {
Me@28 271 //Instead of un-suspending threads, just call the one and only
Me@28 272 // core loop (sequential version), in the main thread.
Me@28 273 coreLoop_Seq( NULL );
Me@28 274
Me@28 275 }
msach@70 276 #endif
Me@28 277
Me@0 278
Me@0 279
Me@8 280 /*Create stack, then create __cdecl structure on it and put initialData and
Me@8 281 * pointer to the new structure instance into the parameter positions on
Me@8 282 * the stack
Me@8 283 *Then put function pointer into nextInstrPt -- the stack is setup in std
Me@8 284 * call structure, so jumping to function ptr is same as a GCC generated
Me@8 285 * function call
Me@8 286 *No need to save registers on old stack frame, because there's no old
Me@8 287 * animator state to return to --
Me@8 288 *
Me@8 289 */
Me@50 290 inline VirtProcr *
Me@50 291 create_procr_helper( VirtProcr *newPr, VirtProcrFnPtr fnPtr,
msach@70 292 void *initialData, char *stackLocs,
msach@70 293 ucontext_t *contextBuf)
Me@50 294 {
msach@70 295 char *stackPtr = ( (char *)stackLocs + VIRT_PROCR_STACK_SIZE - 0x4);
msach@70 296
msach@70 297 getcontext(contextBuf);
msach@70 298 contextBuf->uc_stack.ss_sp=stackLocs;
msach@70 299 contextBuf->uc_stack.ss_size=VIRT_PROCR_STACK_SIZE;
msach@70 300 contextBuf->uc_stack.ss_flags=0;
msach@70 301 makecontext(contextBuf, fnPtr, 2, initialData, newPr);
msach@70 302 contextBuf->uc_link=NULL;
msach@70 303
msach@70 304 newPr->procrID = _VMSMasterEnv->numProcrsCreated++;
msach@70 305 newPr->savedVPStatus = contextBuf;
msach@70 306 newPr->initialData = initialData;
Me@53 307 newPr->startOfStack = stackLocs;
Me@53 308 newPr->requests = NULL;
Me@53 309 newPr->schedSlot = NULL;
Me@50 310
Me@8 311 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
msach@70 312 //*( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
msach@70 313 //*( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
msach@70 314 //newPr->stackPtr = stackPtr; //core loop will switch to this, then
msach@70 315 //newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
Me@8 316
Me@50 317 //============================= MEASUREMENT STUFF ========================
Me@50 318 #ifdef STATS__TURN_ON_PROBES
Me@50 319 struct timeval timeStamp;
Me@50 320 gettimeofday( &(timeStamp), NULL);
Me@54 321 newPr->createPtInSecs = timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0) -
Me@54 322 _VMSMasterEnv->createPtInSecs;
Me@50 323 #endif
Me@50 324 //========================================================================
Me@50 325
Me@8 326 return newPr;
Me@8 327 }
Me@8 328
Me@50 329 inline VirtProcr *
Me@50 330 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
Me@50 331 { VirtProcr *newPr;
Me@50 332 char *stackLocs;
msach@70 333 ucontext_t *contextBuffer;
Me@50 334
Me@50 335 newPr = VMS__malloc( sizeof(VirtProcr) );
Me@50 336 stackLocs = VMS__malloc( VIRT_PROCR_STACK_SIZE );
msach@70 337 contextBuffer = VMS__malloc(sizeof(ucontext_t));
msach@70 338
Me@50 339 if( stackLocs == 0 )
Me@50 340 { perror("VMS__malloc stack"); exit(1); }
Me@50 341
msach@70 342 return create_procr_helper( newPr, fnPtr, initialData, stackLocs, contextBuffer );
Me@50 343 }
Me@50 344
Me@50 345 /* "ext" designates that it's for use outside the VMS system -- should only
Me@50 346 * be called from main thread or other thread -- never from code animated by
Me@50 347 * a VMS virtual processor.
Me@50 348 */
Me@50 349 inline VirtProcr *
Me@50 350 VMS_ext__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
Me@50 351 { VirtProcr *newPr;
Me@50 352 char *stackLocs;
msach@70 353 ucontext_t *contextBuffer;
Me@50 354
Me@50 355 newPr = malloc( sizeof(VirtProcr) );
Me@50 356 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
msach@70 357 contextBuffer = VMS__malloc(sizeof(ucontext_t));
msach@70 358
Me@50 359 if( stackLocs == 0 )
Me@50 360 { perror("malloc stack"); exit(1); }
Me@50 361
msach@70 362 return create_procr_helper( newPr, fnPtr, initialData, stackLocs, contextBuffer );
Me@50 363 }
Me@50 364
Me@8 365
Me@64 366 /*Anticipating multi-tasking
Me@64 367 */
Me@64 368 void *
Me@64 369 VMS__give_sem_env_for( VirtProcr *animPr )
Me@64 370 {
Me@64 371 return _VMSMasterEnv->semanticEnv;
Me@64 372 }
Me@64 373 //===========================================================================
Me@26 374 /*there is a label inside this function -- save the addr of this label in
Me@0 375 * the callingPr struc, as the pick-up point from which to start the next
Me@0 376 * work-unit for that procr. If turns out have to save registers, then
Me@0 377 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
Me@0 378 * "done with work-unit" label. The procr struc is in the request in the
Me@0 379 * slave that animated the just-ended work-unit, so all the state is saved
Me@0 380 * there, and will get passed along, inside the request handler, to the
Me@0 381 * next work-unit for that procr.
Me@0 382 */
Me@8 383 void
Me@38 384 VMS__suspend_procr( VirtProcr *animatingPr )
Me@55 385 {
msach@70 386 //return ownership of the virt procr and sched slot to Master virt pr
Me@38 387 animatingPr->schedSlot->workIsDone = TRUE;
Me@1 388
Me@41 389 //=========================== Measurement stuff ========================
Me@38 390 #ifdef MEAS__TIME_STAMP_SUSP
Me@41 391 //record time stamp: compare to time-stamp recorded below
Me@38 392 saveLowTimeStampCountInto( animatingPr->preSuspTSCLow );
Me@38 393 #endif
Me@41 394 //=======================================================================
msach@70 395
msach@70 396 swapcontext(animatingPr->savedVPStatus,animatingPr->savedCoreLoopStatus);
Me@55 397
Me@55 398 //=======================================================================
Me@38 399 #ifdef MEAS__TIME_STAMP_SUSP
Me@41 400 //NOTE: only take low part of count -- do sanity check when take diff
Me@38 401 saveLowTimeStampCountInto( animatingPr->postSuspTSCLow );
Me@38 402 #endif
Me@0 403 return;
Me@0 404 }
Me@0 405
Me@22 406
Me@22 407
Me@50 408 /*For this implementation of VMS, it may not make much sense to have the
Me@50 409 * system of requests for creating a new processor done this way.. but over
Me@50 410 * the scope of single-master, multi-master, mult-tasking, OS-implementing,
Me@50 411 * distributed-memory, and so on, this gives VMS implementation a chance to
Me@50 412 * do stuff before suspend, in the AppVP, and in the Master before the plugin
Me@50 413 * is called, as well as in the lang-lib before this is called, and in the
Me@50 414 * plugin. So, this gives both VMS and language implementations a chance to
Me@50 415 * intercept at various points and do order-dependent stuff.
Me@50 416 *Having a standard VMSNewPrReqData struc allows the language to create and
Me@50 417 * free the struc, while VMS knows how to get the newPr if it wants it, and
Me@50 418 * it lets the lang have lang-specific data related to creation transported
Me@50 419 * to the plugin.
Me@50 420 */
Me@50 421 void
Me@50 422 VMS__send_create_procr_req( void *semReqData, VirtProcr *reqstingPr )
Me@50 423 { VMSReqst req;
Me@50 424
Me@50 425 req.reqType = createReq;
Me@50 426 req.semReqData = semReqData;
Me@50 427 req.nextReqst = reqstingPr->requests;
Me@50 428 reqstingPr->requests = &req;
Me@50 429
Me@50 430 VMS__suspend_procr( reqstingPr );
Me@50 431 }
Me@50 432
Me@22 433
Me@38 434 /*
Me@22 435 *This adds a request to dissipate, then suspends the processor so that the
Me@22 436 * request handler will receive the request. The request handler is what
Me@22 437 * does the work of freeing memory and removing the processor from the
Me@22 438 * semantic environment's data structures.
Me@22 439 *The request handler also is what figures out when to shutdown the VMS
Me@22 440 * system -- which causes all the core loop threads to die, and returns from
Me@22 441 * the call that started up VMS to perform the work.
Me@22 442 *
Me@22 443 *This form is a bit misleading to understand if one is trying to figure out
Me@22 444 * how VMS works -- it looks like a normal function call, but inside it
Me@22 445 * sends a request to the request handler and suspends the processor, which
Me@22 446 * jumps out of the VMS__dissipate_procr function, and out of all nestings
Me@22 447 * above it, transferring the work of dissipating to the request handler,
Me@22 448 * which then does the actual work -- causing the processor that animated
Me@22 449 * the call of this function to disappear and the "hanging" state of this
Me@22 450 * function to just poof into thin air -- the virtual processor's trace
Me@22 451 * never returns from this call, but instead the virtual processor's trace
Me@22 452 * gets suspended in this call and all the virt processor's state disap-
Me@22 453 * pears -- making that suspend the last thing in the virt procr's trace.
Me@8 454 */
Me@8 455 void
Me@53 456 VMS__send_dissipate_req( VirtProcr *procrToDissipate )
Me@50 457 { VMSReqst req;
Me@22 458
Me@50 459 req.reqType = dissipate;
Me@50 460 req.nextReqst = procrToDissipate->requests;
Me@50 461 procrToDissipate->requests = &req;
Me@50 462
Me@22 463 VMS__suspend_procr( procrToDissipate );
Me@50 464 }
Me@50 465
Me@50 466
Me@50 467 /* "ext" designates that it's for use outside the VMS system -- should only
Me@50 468 * be called from main thread or other thread -- never from code animated by
Me@50 469 * a VMS virtual processor.
Me@50 470 *
Me@50 471 *Use this version to dissipate VPs created outside the VMS system.
Me@50 472 */
Me@50 473 void
Me@50 474 VMS_ext__dissipate_procr( VirtProcr *procrToDissipate )
Me@50 475 {
Me@50 476 //NOTE: initialData was given to the processor, so should either have
Me@50 477 // been alloc'd with VMS__malloc, or freed by the level above animPr.
Me@50 478 //So, all that's left to free here is the stack and the VirtProcr struc
Me@50 479 // itself
Me@50 480 //Note, should not stack-allocate initial data -- no guarantee, in
Me@50 481 // general that creating processor will outlive ones it creates.
Me@50 482 free( procrToDissipate->startOfStack );
Me@50 483 free( procrToDissipate );
Me@50 484 }
Me@50 485
Me@22 486
Me@22 487
Me@53 488 /*This call's name indicates that request is malloc'd -- so req handler
Me@53 489 * has to free any extra requests tacked on before a send, using this.
Me@53 490 *
Me@53 491 * This inserts the semantic-layer's request data into standard VMS carrier
Me@53 492 * request data-struct that is mallocd. The sem request doesn't need to
Me@53 493 * be malloc'd if this is called inside the same call chain before the
Me@53 494 * send of the last request is called.
Me@53 495 *
Me@53 496 *The request handler has to call VMS__free_VMSReq for any of these
Me@22 497 */
Me@22 498 inline void
Me@53 499 VMS__add_sem_request_in_mallocd_VMSReqst( void *semReqData,
Me@53 500 VirtProcr *callingPr )
Me@53 501 { VMSReqst *req;
Me@22 502
Me@53 503 req = VMS__malloc( sizeof(VMSReqst) );
Me@53 504 req->reqType = semantic;
Me@53 505 req->semReqData = semReqData;
Me@53 506 req->nextReqst = callingPr->requests;
Me@53 507 callingPr->requests = req;
Me@22 508 }
Me@22 509
Me@50 510 /*This inserts the semantic-layer's request data into standard VMS carrier
Me@50 511 * request data-struct is allocated on stack of this call & ptr to it sent
Me@50 512 * to plugin
Me@50 513 *Then it does suspend, to cause request to be sent.
Me@50 514 */
Me@50 515 inline void
Me@50 516 VMS__send_sem_request( void *semReqData, VirtProcr *callingPr )
Me@50 517 { VMSReqst req;
Me@22 518
Me@50 519 req.reqType = semantic;
Me@50 520 req.semReqData = semReqData;
Me@50 521 req.nextReqst = callingPr->requests;
Me@50 522 callingPr->requests = &req;
Me@50 523
Me@50 524 VMS__suspend_procr( callingPr );
Me@50 525 }
Me@50 526
Me@50 527
Me@50 528 inline void
Me@50 529 VMS__send_VMSSem_request( void *semReqData, VirtProcr *callingPr )
Me@50 530 { VMSReqst req;
Me@50 531
Me@50 532 req.reqType = VMSSemantic;
Me@50 533 req.semReqData = semReqData;
Me@50 534 req.nextReqst = callingPr->requests; //gab any other preceeding
Me@50 535 callingPr->requests = &req;
Me@50 536
Me@50 537 VMS__suspend_procr( callingPr );
Me@50 538 }
Me@50 539
Me@50 540
Me@50 541 /*
Me@38 542 */
Me@24 543 VMSReqst *
Me@50 544 VMS__take_next_request_out_of( VirtProcr *procrWithReq )
Me@31 545 { VMSReqst *req;
Me@31 546
Me@31 547 req = procrWithReq->requests;
Me@38 548 if( req == NULL ) return NULL;
Me@31 549
Me@31 550 procrWithReq->requests = procrWithReq->requests->nextReqst;
Me@50 551 return req;
Me@24 552 }
Me@22 553
Me@24 554
Me@24 555 inline void *
Me@24 556 VMS__take_sem_reqst_from( VMSReqst *req )
Me@24 557 {
Me@24 558 return req->semReqData;
Me@24 559 }
Me@24 560
Me@24 561
Me@24 562
Me@50 563 /* This is for OS requests and VMS infrastructure requests, such as to create
Me@50 564 * a probe -- a probe is inside the heart of VMS-core, it's not part of any
Me@50 565 * language -- but it's also a semantic thing that's triggered from and used
Me@50 566 * in the application.. so it crosses abstractions.. so, need some special
Me@50 567 * pattern here for handling such requests.
Me@52 568 * Doing this just like it were a second language sharing VMS-core.
Me@52 569 *
Me@50 570 * This is called from the language's request handler when it sees a request
Me@50 571 * of type VMSSemReq
Me@52 572 *
Me@52 573 * TODO: Later change this, to give probes their own separate plugin & have
Me@52 574 * VMS-core steer the request to appropriate plugin
Me@52 575 * Do the same for OS calls -- look later at it..
Me@50 576 */
Me@50 577 void inline
Me@50 578 VMS__handle_VMSSemReq( VMSReqst *req, VirtProcr *requestingPr, void *semEnv,
Me@50 579 ResumePrFnPtr resumePrFnPtr )
Me@50 580 { VMSSemReq *semReq;
Me@50 581 IntervalProbe *newProbe;
Me@50 582 int32 nameLen;
Me@24 583
Me@50 584 semReq = req->semReqData;
Me@24 585
Me@50 586 newProbe = VMS__malloc( sizeof(IntervalProbe) );
Me@65 587 newProbe->nameStr = VMS__strDup( semReq->nameStr );
Me@50 588 newProbe->hist = NULL;
Me@50 589 newProbe->schedChoiceWasRecorded = FALSE;
Me@53 590
Me@53 591 //This runs in masterVP, so no race-condition worries
Me@50 592 newProbe->probeID =
Me@50 593 addToDynArray( newProbe, _VMSMasterEnv->dynIntervalProbesInfo );
Me@50 594
Me@53 595 requestingPr->dataRetFromReq = newProbe;
Me@50 596
Me@50 597 (*resumePrFnPtr)( requestingPr, semEnv );
Me@22 598 }
Me@22 599
Me@22 600
Me@22 601
Me@24 602 /*This must be called by the request handler plugin -- it cannot be called
Me@24 603 * from the semantic library "dissipate processor" function -- instead, the
Me@50 604 * semantic layer has to generate a request, and the plug-in calls this
Me@24 605 * function.
Me@24 606 *The reason is that this frees the virtual processor's stack -- which is
Me@24 607 * still in use inside semantic library calls!
Me@24 608 *
Me@24 609 *This frees or recycles all the state owned by and comprising the VMS
Me@24 610 * portion of the animating virtual procr. The request handler must first
Me@24 611 * free any semantic data created for the processor that didn't use the
Me@24 612 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
Me@24 613 * system to disown any state that did use VMS_malloc, and then frees the
Me@24 614 * statck and the processor-struct itself.
Me@24 615 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
Me@24 616 * state, then that state gets freed (or sent to recycling) as a side-effect
Me@24 617 * of dis-owning it.
Me@24 618 */
Me@24 619 void
Me@53 620 VMS__dissipate_procr( VirtProcr *animatingPr )
Me@24 621 {
Me@24 622 //dis-own all locations owned by this processor, causing to be freed
Me@24 623 // any locations that it is (was) sole owner of
Me@29 624 //TODO: implement VMS__malloc system, including "give up ownership"
Me@24 625
Me@24 626
Me@24 627 //NOTE: initialData was given to the processor, so should either have
Me@24 628 // been alloc'd with VMS__malloc, or freed by the level above animPr.
Me@24 629 //So, all that's left to free here is the stack and the VirtProcr struc
Me@24 630 // itself
Me@50 631 //Note, should not stack-allocate initial data -- no guarantee, in
Me@50 632 // general that creating processor will outlive ones it creates.
Me@50 633 VMS__free( animatingPr->startOfStack );
Me@50 634 VMS__free( animatingPr );
Me@24 635 }
Me@24 636
Me@24 637
Me@53 638 //TODO: look at architecting cleanest separation between request handler
Me@29 639 // and master loop, for dissipate, create, shutdown, and other non-semantic
Me@29 640 // requests. Issue is chain: one removes requests from AppVP, one dispatches
Me@29 641 // on type of request, and one handles each type.. but some types require
Me@29 642 // action from both request handler and master loop -- maybe just give the
Me@29 643 // request handler calls like: VMS__handle_X_request_type
Me@24 644
Me@29 645
Me@29 646 /*This is called by the semantic layer's request handler when it decides its
Me@29 647 * time to shut down the VMS system. Calling this causes the core loop OS
Me@29 648 * threads to exit, which unblocks the entry-point function that started up
Me@29 649 * VMS, and allows it to grab the result and return to the original single-
Me@29 650 * threaded application.
Me@22 651 *
Me@29 652 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
Me@29 653 * and-wait function has to free a bunch of stuff after it detects the
Me@29 654 * threads have all died: the masterEnv, the thread-related locations,
Me@29 655 * masterVP any AppVPs that might still be allocated and sitting in the
Me@29 656 * semantic environment, or have been orphaned in the _VMSWorkQ.
Me@29 657 *
Me@53 658 *NOTE: the semantic plug-in is expected to use VMS__malloc to get all the
Me@29 659 * locations it needs, and give ownership to masterVP. Then, they will be
Me@53 660 * automatically freed.
Me@22 661 *
Me@29 662 *In here,create one core-loop shut-down processor for each core loop and put
Me@31 663 * them all directly into the readyToAnimateQ.
Me@29 664 *Note, this function can ONLY be called after the semantic environment no
Me@29 665 * longer cares if AppVPs get animated after the point this is called. In
Me@29 666 * other words, this can be used as an abort, or else it should only be
Me@29 667 * called when all AppVPs have finished dissipate requests -- only at that
Me@29 668 * point is it sure that all results have completed.
Me@22 669 */
Me@22 670 void
Me@53 671 VMS__shutdown()
Me@8 672 { int coreIdx;
Me@14 673 VirtProcr *shutDownPr;
Me@22 674
Me@29 675 //create the shutdown processors, one for each core loop -- put them
Me@31 676 // directly into the Q -- each core will die when gets one
Me@8 677 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@50 678 { //Note, this is running in the master
Me@29 679 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
Me@55 680 writeVMSQ( shutDownPr, _VMSMasterEnv->readyToAnimateQs[coreIdx] );
Me@8 681 }
Me@22 682
Me@12 683 }
Me@12 684
Me@12 685
Me@29 686 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
Me@29 687 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
Me@29 688 *This function has the sole purpose of setting the stack and framePtr
Me@29 689 * to the coreLoop's stack and framePtr.. it does that then jumps to the
Me@29 690 * core loop's shutdown point -- might be able to just call Pthread_exit
Me@30 691 * from here, but am going back to the pthread's stack and setting everything
Me@29 692 * up just as if it never jumped out, before calling pthread_exit.
Me@29 693 *The end-point of core loop will free the stack and so forth of the
Me@29 694 * processor that animates this function, (this fn is transfering the
Me@29 695 * animator of the AppVP that is in turn animating this function over
Me@29 696 * to core loop function -- note that this slices out a level of virtual
Me@29 697 * processors).
Me@29 698 */
Me@29 699 void
Me@29 700 endOSThreadFn( void *initData, VirtProcr *animatingPr )
Me@29 701 { void *jmpPt, *coreLoopStackPtr, *coreLoopFramePtr;
msach@70 702 ucontext_t* contextBuf = animatingPr->savedCoreLoopStatus;
msach@70 703 void *stackPtr = contextBuf->uc_mcontext.gregs[REG_ESP];
msach@70 704
msach@70 705 getcontext(contextBuf);
msach@70 706 contextBuf->uc_stack.ss_sp=stackPtr;
msach@70 707 makecontext(contextBuf,&terminateCoreLoop,1,animatingPr);
msach@70 708 contextBuf->uc_link=NULL;
msach@70 709 swapcontext(animatingPr->savedVPStatus,contextBuf);
msach@70 710 }
Me@29 711
Me@29 712
Me@53 713 /*This is called from the startup & shutdown
Me@24 714 */
Me@24 715 void
Me@53 716 VMS__cleanup_at_end_of_shutdown()
Me@31 717 {
Me@55 718 VMSQueueStruc **readyToAnimateQs;
Me@31 719 int coreIdx;
Me@31 720 VirtProcr **masterVPs;
Me@31 721 SchedSlot ***allSchedSlots; //ptr to array of ptrs
Me@31 722
Me@65 723 //Before getting rid of everything, print out any measurements made
msach@69 724 forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, (DynArrayFnPtr)&printHist );
Me@68 725 //forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, &freeHistExt );
Me@65 726 #ifdef MEAS__TIME_PLUGIN
Me@68 727 printHist( _VMSMasterEnv->reqHdlrLowTimeHist );
Me@68 728 printHist( _VMSMasterEnv->reqHdlrHighTimeHist );
Me@68 729 freeHistExt( _VMSMasterEnv->reqHdlrLowTimeHist );
Me@68 730 freeHistExt( _VMSMasterEnv->reqHdlrHighTimeHist );
Me@65 731 #endif
Me@65 732 #ifdef MEAS__TIME_MALLOC
Me@65 733 printHist( _VMSMasterEnv->mallocTimeHist );
Me@65 734 printHist( _VMSMasterEnv->freeTimeHist );
Me@65 735 freeHistExt( _VMSMasterEnv->mallocTimeHist );
Me@65 736 freeHistExt( _VMSMasterEnv->freeTimeHist );
Me@65 737 #endif
Me@65 738 #ifdef MEAS__TIME_MASTER_LOCK
Me@65 739 printHist( _VMSMasterEnv->masterLockLowTimeHist );
Me@65 740 printHist( _VMSMasterEnv->masterLockHighTimeHist );
Me@65 741 #endif
Me@65 742 #ifdef MEAS__TIME_MASTER
Me@65 743 printHist( _VMSMasterEnv->pluginTimeHist );
Me@65 744 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@65 745 {
Me@65 746 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@65 747 //master VPs were created external to VMS, so use external free
Me@65 748 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@65 749
Me@65 750 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@65 751 }
Me@65 752 #endif
Me@65 753 #ifdef MEAS__TIME_STAMP_SUSP
Me@65 754 printHist( _VMSMasterEnv->pluginTimeHist );
Me@65 755 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@65 756 {
Me@65 757 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@65 758 //master VPs were created external to VMS, so use external free
Me@65 759 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@65 760
Me@65 761 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@65 762 }
Me@65 763 #endif
Me@65 764
Me@53 765 //All the environment data has been allocated with VMS__malloc, so just
Me@53 766 // free its internal big-chunk and all inside it disappear.
Me@53 767 /*
Me@31 768 readyToAnimateQs = _VMSMasterEnv->readyToAnimateQs;
Me@31 769 masterVPs = _VMSMasterEnv->masterVPs;
Me@31 770 allSchedSlots = _VMSMasterEnv->allSchedSlots;
Me@31 771
Me@31 772 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@24 773 {
Me@55 774 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@50 775 //master VPs were created external to VMS, so use external free
Me@53 776 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@31 777
Me@31 778 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@24 779 }
Me@31 780
Me@53 781 VMS__free( _VMSMasterEnv->readyToAnimateQs );
Me@53 782 VMS__free( _VMSMasterEnv->masterVPs );
Me@53 783 VMS__free( _VMSMasterEnv->allSchedSlots );
Me@50 784
Me@50 785 //============================= MEASUREMENT STUFF ========================
Me@50 786 #ifdef STATS__TURN_ON_PROBES
Me@53 787 freeDynArrayDeep( _VMSMasterEnv->dynIntervalProbesInfo, &VMS__free_probe);
Me@50 788 #endif
Me@50 789 //========================================================================
Me@53 790 */
Me@53 791 //These are the only two that use system free
Me@53 792 VMS_ext__free_free_list( _VMSMasterEnv->freeListHead );
Me@53 793 free( (void *)_VMSMasterEnv );
Me@24 794 }
Me@24 795
Me@54 796
Me@54 797 //================================
Me@54 798
Me@54 799
Me@54 800 /*Later, improve this -- for now, just exits the application after printing
Me@54 801 * the error message.
Me@54 802 */
Me@54 803 void
Me@54 804 VMS__throw_exception( char *msgStr, VirtProcr *reqstPr, VMSExcp *excpData )
Me@54 805 {
msach@69 806 printf("%s",msgStr);
Me@54 807 fflush(stdin);
Me@54 808 exit(1);
Me@54 809 }
Me@54 810