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| author | Nina Engelhardt |
|---|---|
| date | Wed, 17 Aug 2011 11:46:05 +0200 |
| parents | 724c7a0b687f |
| children | 73fc5aafbe45 |
line source
1 /*
2 * Copyright 2010 OpenSourceStewardshipFoundation
3 *
4 * Licensed under BSD
5 */
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <malloc.h>
11 #include <inttypes.h>
12 #include <sys/time.h>
14 #include "VMS.h"
15 #include "ProcrContext.h"
16 #include "Queue_impl/BlockingQueue.h"
17 #include "Histogram/Histogram.h"
19 #include <unistd.h>
20 #include <fcntl.h>
21 #include <linux/types.h>
22 #include <linux/perf_event.h>
23 #include <errno.h>
24 #include <sys/syscall.h>
25 #include <linux/prctl.h>
28 #define thdAttrs NULL
30 //===========================================================================
31 void
32 shutdownFn( void *dummy, VirtProcr *dummy2 );
34 SchedSlot **
35 create_sched_slots();
37 void
38 create_masterEnv();
40 void
41 create_the_coreLoop_OS_threads();
43 MallocProlog *
44 create_free_list();
46 void
47 endOSThreadFn( void *initData, VirtProcr *animatingPr );
49 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
50 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
52 //===========================================================================
54 /*Setup has two phases:
55 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
56 * the master virt procr into the work-queue, ready for first "call"
57 * 2) Semantic layer then does its own init, which creates the seed virt
58 * procr inside the semantic layer, ready to schedule it when
59 * asked by the first run of the masterLoop.
60 *
61 *This part is bit weird because VMS really wants to be "always there", and
62 * have applications attach and detach.. for now, this VMS is part of
63 * the app, so the VMS system starts up as part of running the app.
64 *
65 *The semantic layer is isolated from the VMS internals by making the
66 * semantic layer do setup to a state that it's ready with its
67 * initial virt procrs, ready to schedule them to slots when the masterLoop
68 * asks. Without this pattern, the semantic layer's setup would
69 * have to modify slots directly to assign the initial virt-procrs, and put
70 * them into the readyToAnimateQ itself, breaking the isolation completely.
71 *
72 *
73 *The semantic layer creates the initial virt procr(s), and adds its
74 * own environment to masterEnv, and fills in the pointers to
75 * the requestHandler and slaveScheduler plug-in functions
76 */
78 /*This allocates VMS data structures, populates the master VMSProc,
79 * and master environment, and returns the master environment to the semantic
80 * layer.
81 */
82 void
83 VMS__init()
84 {
85 create_masterEnv();
86 create_the_coreLoop_OS_threads();
87 }
89 #ifdef SEQUENTIAL
91 /*To initialize the sequential version, just don't create the threads
92 */
93 void
94 VMS__init_Seq()
95 {
96 create_masterEnv();
97 }
99 #endif
101 void
102 create_masterEnv()
103 { MasterEnv *masterEnv;
104 VMSQueueStruc **readyToAnimateQs;
105 int coreIdx;
106 VirtProcr **masterVPs;
107 SchedSlot ***allSchedSlots; //ptr to array of ptrs
110 //Make the master env, which holds everything else
111 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
113 //Very first thing put into the master env is the free-list, seeded
114 // with a massive initial chunk of memory.
115 //After this, all other mallocs are VMS__malloc.
116 _VMSMasterEnv->freeListHead = VMS_ext__create_free_list();
119 //============================= MEASUREMENT STUFF ========================
120 #ifdef MEAS__TIME_MALLOC
121 _VMSMasterEnv->mallocTimeHist = makeFixedBinHistExt( 50, 0, 100,
122 "malloc_time_hist");
123 _VMSMasterEnv->freeTimeHist = makeFixedBinHistExt( 50, 0, 100,
124 "free_time_hist");
125 #endif
126 #ifdef MEAS__TIME_PLUGIN
127 _VMSMasterEnv->reqHdlrLowTimeHist = makeFixedBinHistExt( 50, 0, 10,
128 "plugin_low_time_hist");
129 _VMSMasterEnv->reqHdlrHighTimeHist = makeFixedBinHistExt( 50, 0, 100,
130 "plugin_high_time_hist");
131 #endif
132 //========================================================================
134 //===================== Only VMS__malloc after this ====================
135 masterEnv = (MasterEnv*)_VMSMasterEnv;
137 //Make a readyToAnimateQ for each core loop
138 readyToAnimateQs = VMS__malloc( NUM_CORES * sizeof(VMSQueueStruc *) );
139 masterVPs = VMS__malloc( NUM_CORES * sizeof(VirtProcr *) );
141 //One array for each core, 3 in array, core's masterVP scheds all
142 allSchedSlots = VMS__malloc( NUM_CORES * sizeof(SchedSlot *) );
144 _VMSMasterEnv->numProcrsCreated = 0; //used by create procr
145 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
146 {
147 readyToAnimateQs[ coreIdx ] = makeVMSQ();
149 //Q: should give masterVP core-specific info as its init data?
150 masterVPs[ coreIdx ] = VMS__create_procr( (VirtProcrFnPtr)&masterLoop, (void*)masterEnv );
151 masterVPs[ coreIdx ]->coreAnimatedBy = coreIdx;
152 allSchedSlots[ coreIdx ] = create_sched_slots(); //makes for one core
153 _VMSMasterEnv->numMasterInARow[ coreIdx ] = 0;
154 _VMSMasterEnv->workStealingGates[ coreIdx ] = NULL;
155 }
156 _VMSMasterEnv->readyToAnimateQs = readyToAnimateQs;
157 _VMSMasterEnv->masterVPs = masterVPs;
158 _VMSMasterEnv->masterLock = UNLOCKED;
159 _VMSMasterEnv->allSchedSlots = allSchedSlots;
160 _VMSMasterEnv->workStealingLock = UNLOCKED;
163 //Aug 19, 2010: no longer need to place initial masterVP into queue
164 // because coreLoop now controls -- animates its masterVP when no work
167 //============================= MEASUREMENT STUFF ========================
168 #ifdef STATS__TURN_ON_PROBES
169 _VMSMasterEnv->dynIntervalProbesInfo =
170 makePrivDynArrayOfSize( (void***)&(_VMSMasterEnv->intervalProbes), 200);
172 _VMSMasterEnv->probeNameHashTbl = makeHashTable( 1000, &VMS__free );
174 //put creation time directly into master env, for fast retrieval
175 struct timeval timeStamp;
176 gettimeofday( &(timeStamp), NULL);
177 _VMSMasterEnv->createPtInSecs =
178 timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0);
179 #endif
180 #ifdef MEAS__TIME_MASTER_LOCK
181 _VMSMasterEnv->masterLockLowTimeHist = makeFixedBinHist( 50, 0, 2,
182 "master lock low time hist");
183 _VMSMasterEnv->masterLockHighTimeHist = makeFixedBinHist( 50, 0, 100,
184 "master lock high time hist");
185 #endif
187 MakeTheMeasHists();
189 #ifdef MEAS__PERF_COUNTERS
190 //printf("Creating HW counters...");
191 FILE* output;
192 int n;
193 char filename[255];
194 for(n=0;n<255;n++)
195 {
196 sprintf(filename, "./counters/Counters.%d.csv",n);
197 output = fopen(filename,"r");
198 if(output)
199 {
200 fclose(output);
201 }else{
202 break;
203 }
204 }
205 printf("Saving Counter measurements to File: %s ...\n", filename);
206 output = fopen(filename,"w+");
207 _VMSMasterEnv->counteroutput = output;
209 struct perf_event_attr hw_event;
210 memset(&hw_event,0,sizeof(hw_event));
211 hw_event.type = PERF_TYPE_HARDWARE;
212 hw_event.size = sizeof(hw_event);
213 hw_event.disabled = 1;
214 hw_event.freq = 0;
215 hw_event.inherit = 1; /* children inherit it */
216 hw_event.pinned = 1; /* must always be on PMU */
217 hw_event.exclusive = 0; /* only group on PMU */
218 hw_event.exclude_user = 0; /* don't count user */
219 hw_event.exclude_kernel = 1; /* ditto kernel */
220 hw_event.exclude_hv = 1; /* ditto hypervisor */
221 hw_event.exclude_idle = 0; /* don't count when idle */
222 hw_event.mmap = 0; /* include mmap data */
223 hw_event.comm = 0; /* include comm data */
226 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
227 {
228 hw_event.config = 0x0000000000000000; //cycles
229 _VMSMasterEnv->cycles_counter_fd[coreIdx] = syscall(__NR_perf_event_open, &hw_event,
230 0,//pid_t pid,
231 -1,//int cpu,
232 -1,//int group_fd,
233 0//unsigned long flags
234 );
235 if (_VMSMasterEnv->cycles_counter_fd[coreIdx]<0){
236 fprintf(stderr,"On core %d: ",coreIdx);
237 perror("Failed to open cycles counter");
238 }
239 hw_event.config = 0x0000000000000001; //instrs
240 _VMSMasterEnv->instrs_counter_fd[coreIdx] = syscall(__NR_perf_event_open, &hw_event,
241 0,//pid_t pid,
242 -1,//int cpu,
243 -1,//int group_fd,
244 0//unsigned long flags
245 );
246 if (_VMSMasterEnv->instrs_counter_fd[coreIdx]<0){
247 fprintf(stderr,"On core %d: ",coreIdx);
248 perror("Failed to open instrs counter");
249 }
250 }
251 prctl(PR_TASK_PERF_EVENTS_ENABLE);
252 uint64 tmpc,tmpi;
253 saveCyclesAndInstrs(0,tmpc,tmpi);
254 printf("Start: cycles = %lu, instrs = %lu\n",tmpc,tmpi);
255 #endif
257 //========================================================================
259 }
261 SchedSlot **
262 create_sched_slots()
263 { SchedSlot **schedSlots;
264 int i;
266 schedSlots = VMS__malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
268 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
269 {
270 schedSlots[i] = VMS__malloc( sizeof(SchedSlot) );
272 //Set state to mean "handling requests done, slot needs filling"
273 schedSlots[i]->workIsDone = FALSE;
274 schedSlots[i]->needsProcrAssigned = TRUE;
275 }
276 return schedSlots;
277 }
280 void
281 freeSchedSlots( SchedSlot **schedSlots )
282 { int i;
283 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
284 {
285 VMS__free( schedSlots[i] );
286 }
287 VMS__free( schedSlots );
288 }
291 void
292 create_the_coreLoop_OS_threads()
293 {
294 //========================================================================
295 // Create the Threads
296 int coreIdx, retCode;
298 //Need the threads to be created suspended, and wait for a signal
299 // before proceeding -- gives time after creating to initialize other
300 // stuff before the coreLoops set off.
301 _VMSMasterEnv->setupComplete = 0;
303 //Make the threads that animate the core loops
304 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
305 { coreLoopThdParams[coreIdx] = VMS__malloc( sizeof(ThdParams) );
306 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
308 retCode =
309 pthread_create( &(coreLoopThdHandles[coreIdx]),
310 thdAttrs,
311 &coreLoop,
312 (void *)(coreLoopThdParams[coreIdx]) );
313 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(1);}
314 }
315 }
317 /*Semantic layer calls this when it want the system to start running..
318 *
319 *This starts the core loops running then waits for them to exit.
320 */
321 void
322 VMS__start_the_work_then_wait_until_done()
323 { int coreIdx;
324 //Start the core loops running
326 //tell the core loop threads that setup is complete
327 //get lock, to lock out any threads still starting up -- they'll see
328 // that setupComplete is true before entering while loop, and so never
329 // wait on the condition
330 pthread_mutex_lock( &suspendLock );
331 _VMSMasterEnv->setupComplete = 1;
332 pthread_mutex_unlock( &suspendLock );
333 pthread_cond_broadcast( &suspend_cond );
336 //wait for all to complete
337 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
338 {
339 pthread_join( coreLoopThdHandles[coreIdx], NULL );
340 }
342 //NOTE: do not clean up VMS env here -- semantic layer has to have
343 // a chance to clean up its environment first, then do a call to free
344 // the Master env and rest of VMS locations
345 }
347 #ifdef SEQUENTIAL
348 /*Only difference between version with an OS thread pinned to each core and
349 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
350 */
351 void
352 VMS__start_the_work_then_wait_until_done_Seq()
353 {
354 //Instead of un-suspending threads, just call the one and only
355 // core loop (sequential version), in the main thread.
356 coreLoop_Seq( NULL );
357 flushRegisters();
359 }
360 #endif
362 inline VirtProcr *
363 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
364 { VirtProcr *newPr;
365 void *stackLocs;
367 newPr = VMS__malloc( sizeof(VirtProcr) );
368 stackLocs = VMS__malloc( VIRT_PROCR_STACK_SIZE );
369 if( stackLocs == 0 )
370 { perror("VMS__malloc stack"); exit(1); }
372 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
373 }
375 /* "ext" designates that it's for use outside the VMS system -- should only
376 * be called from main thread or other thread -- never from code animated by
377 * a VMS virtual processor.
378 */
379 inline VirtProcr *
380 VMS_ext__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
381 { VirtProcr *newPr;
382 char *stackLocs;
384 newPr = malloc( sizeof(VirtProcr) );
385 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
386 if( stackLocs == 0 )
387 { perror("malloc stack"); exit(1); }
389 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
390 }
393 /*Anticipating multi-tasking
394 */
395 void *
396 VMS__give_sem_env_for( VirtProcr *animPr )
397 {
398 return _VMSMasterEnv->semanticEnv;
399 }
400 //===========================================================================
401 /*there is a label inside this function -- save the addr of this label in
402 * the callingPr struc, as the pick-up point from which to start the next
403 * work-unit for that procr. If turns out have to save registers, then
404 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
405 * "done with work-unit" label. The procr struc is in the request in the
406 * slave that animated the just-ended work-unit, so all the state is saved
407 * there, and will get passed along, inside the request handler, to the
408 * next work-unit for that procr.
409 */
410 void
411 VMS__suspend_procr( VirtProcr *animatingPr )
412 {
414 //The request to master will cause this suspended virt procr to get
415 // scheduled again at some future point -- to resume, core loop jumps
416 // to the resume point (below), which causes restore of saved regs and
417 // "return" from this call.
418 //animatingPr->nextInstrPt = &&ResumePt;
420 //return ownership of the virt procr and sched slot to Master virt pr
421 animatingPr->schedSlot->workIsDone = TRUE;
423 //=========================== Measurement stuff ========================
424 #ifdef MEAS__TIME_STAMP_SUSP
425 //record time stamp: compare to time-stamp recorded below
426 saveLowTimeStampCountInto( animatingPr->preSuspTSCLow );
427 #endif
428 //=======================================================================
430 switchToCoreLoop(animatingPr);
431 flushRegisters();
433 //=======================================================================
435 #ifdef MEAS__TIME_STAMP_SUSP
436 //NOTE: only take low part of count -- do sanity check when take diff
437 saveLowTimeStampCountInto( animatingPr->postSuspTSCLow );
438 #endif
440 return;
441 }
445 /*For this implementation of VMS, it may not make much sense to have the
446 * system of requests for creating a new processor done this way.. but over
447 * the scope of single-master, multi-master, mult-tasking, OS-implementing,
448 * distributed-memory, and so on, this gives VMS implementation a chance to
449 * do stuff before suspend, in the AppVP, and in the Master before the plugin
450 * is called, as well as in the lang-lib before this is called, and in the
451 * plugin. So, this gives both VMS and language implementations a chance to
452 * intercept at various points and do order-dependent stuff.
453 *Having a standard VMSNewPrReqData struc allows the language to create and
454 * free the struc, while VMS knows how to get the newPr if it wants it, and
455 * it lets the lang have lang-specific data related to creation transported
456 * to the plugin.
457 */
458 __attribute__ ((noinline)) void
459 VMS__send_create_procr_req( void *semReqData, VirtProcr *reqstingPr )
461 { VMSReqst req;
463 req.reqType = createReq;
464 req.semReqData = semReqData;
465 req.nextReqst = reqstingPr->requests;
466 reqstingPr->requests = &req;
468 VMS__suspend_procr( reqstingPr );
469 }
472 /*
473 *This adds a request to dissipate, then suspends the processor so that the
474 * request handler will receive the request. The request handler is what
475 * does the work of freeing memory and removing the processor from the
476 * semantic environment's data structures.
477 *The request handler also is what figures out when to shutdown the VMS
478 * system -- which causes all the core loop threads to die, and returns from
479 * the call that started up VMS to perform the work.
480 *
481 *This form is a bit misleading to understand if one is trying to figure out
482 * how VMS works -- it looks like a normal function call, but inside it
483 * sends a request to the request handler and suspends the processor, which
484 * jumps out of the VMS__dissipate_procr function, and out of all nestings
485 * above it, transferring the work of dissipating to the request handler,
486 * which then does the actual work -- causing the processor that animated
487 * the call of this function to disappear and the "hanging" state of this
488 * function to just poof into thin air -- the virtual processor's trace
489 * never returns from this call, but instead the virtual processor's trace
490 * gets suspended in this call and all the virt processor's state disap-
491 * pears -- making that suspend the last thing in the virt procr's trace.
492 */
493 __attribute__ ((noinline)) void
494 VMS__send_dissipate_req( VirtProcr *procrToDissipate )
495 { VMSReqst req;
497 req.reqType = dissipate;
498 req.nextReqst = procrToDissipate->requests;
499 procrToDissipate->requests = &req;
501 VMS__suspend_procr( procrToDissipate );
502 }
505 /* "ext" designates that it's for use outside the VMS system -- should only
506 * be called from main thread or other thread -- never from code animated by
507 * a VMS virtual processor.
508 *
509 *Use this version to dissipate VPs created outside the VMS system.
510 */
511 void
512 VMS_ext__dissipate_procr( VirtProcr *procrToDissipate )
513 {
514 //NOTE: initialData was given to the processor, so should either have
515 // been alloc'd with VMS__malloc, or freed by the level above animPr.
516 //So, all that's left to free here is the stack and the VirtProcr struc
517 // itself
518 //Note, should not stack-allocate initial data -- no guarantee, in
519 // general that creating processor will outlive ones it creates.
520 free( procrToDissipate->startOfStack );
521 free( procrToDissipate );
522 }
526 /*This call's name indicates that request is malloc'd -- so req handler
527 * has to free any extra requests tacked on before a send, using this.
528 *
529 * This inserts the semantic-layer's request data into standard VMS carrier
530 * request data-struct that is mallocd. The sem request doesn't need to
531 * be malloc'd if this is called inside the same call chain before the
532 * send of the last request is called.
533 *
534 *The request handler has to call VMS__free_VMSReq for any of these
535 */
536 inline void
537 VMS__add_sem_request_in_mallocd_VMSReqst( void *semReqData,
538 VirtProcr *callingPr )
539 { VMSReqst *req;
541 req = VMS__malloc( sizeof(VMSReqst) );
542 req->reqType = semantic;
543 req->semReqData = semReqData;
544 req->nextReqst = callingPr->requests;
545 callingPr->requests = req;
546 }
548 /*This inserts the semantic-layer's request data into standard VMS carrier
549 * request data-struct is allocated on stack of this call & ptr to it sent
550 * to plugin
551 *Then it does suspend, to cause request to be sent.
552 */
553 /*inline*/__attribute__ ((noinline)) void
554 VMS__send_sem_request( void *semReqData, VirtProcr *callingPr )
555 { VMSReqst req;
557 req.reqType = semantic;
558 req.semReqData = semReqData;
559 req.nextReqst = callingPr->requests;
560 callingPr->requests = &req;
562 VMS__suspend_procr( callingPr );
563 }
566 /*inline*/ __attribute__ ((noinline)) void
567 VMS__send_VMSSem_request( void *semReqData, VirtProcr *callingPr )
569 { VMSReqst req;
571 req.reqType = VMSSemantic;
572 req.semReqData = semReqData;
573 req.nextReqst = callingPr->requests; //gab any other preceeding
574 callingPr->requests = &req;
576 VMS__suspend_procr( callingPr );
577 }
580 /*
581 */
582 VMSReqst *
583 VMS__take_next_request_out_of( VirtProcr *procrWithReq )
584 { VMSReqst *req;
586 req = procrWithReq->requests;
587 if( req == NULL ) return NULL;
589 procrWithReq->requests = procrWithReq->requests->nextReqst;
590 return req;
591 }
594 inline void *
595 VMS__take_sem_reqst_from( VMSReqst *req )
596 {
597 return req->semReqData;
598 }
602 /* This is for OS requests and VMS infrastructure requests, such as to create
603 * a probe -- a probe is inside the heart of VMS-core, it's not part of any
604 * language -- but it's also a semantic thing that's triggered from and used
605 * in the application.. so it crosses abstractions.. so, need some special
606 * pattern here for handling such requests.
607 * Doing this just like it were a second language sharing VMS-core.
608 *
609 * This is called from the language's request handler when it sees a request
610 * of type VMSSemReq
611 *
612 * TODO: Later change this, to give probes their own separate plugin & have
613 * VMS-core steer the request to appropriate plugin
614 * Do the same for OS calls -- look later at it..
615 */
616 void inline
617 VMS__handle_VMSSemReq( VMSReqst *req, VirtProcr *requestingPr, void *semEnv,
618 ResumePrFnPtr resumePrFnPtr )
619 { VMSSemReq *semReq;
620 IntervalProbe *newProbe;
622 semReq = req->semReqData;
624 newProbe = VMS__malloc( sizeof(IntervalProbe) );
625 newProbe->nameStr = VMS__strDup( semReq->nameStr );
626 newProbe->hist = NULL;
627 newProbe->schedChoiceWasRecorded = FALSE;
629 //This runs in masterVP, so no race-condition worries
630 newProbe->probeID =
631 addToDynArray( newProbe, _VMSMasterEnv->dynIntervalProbesInfo );
633 requestingPr->dataRetFromReq = newProbe;
635 (*resumePrFnPtr)( requestingPr, semEnv );
636 }
640 /*This must be called by the request handler plugin -- it cannot be called
641 * from the semantic library "dissipate processor" function -- instead, the
642 * semantic layer has to generate a request, and the plug-in calls this
643 * function.
644 *The reason is that this frees the virtual processor's stack -- which is
645 * still in use inside semantic library calls!
646 *
647 *This frees or recycles all the state owned by and comprising the VMS
648 * portion of the animating virtual procr. The request handler must first
649 * free any semantic data created for the processor that didn't use the
650 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
651 * system to disown any state that did use VMS_malloc, and then frees the
652 * statck and the processor-struct itself.
653 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
654 * state, then that state gets freed (or sent to recycling) as a side-effect
655 * of dis-owning it.
656 */
657 void
658 VMS__dissipate_procr( VirtProcr *animatingPr )
659 {
660 //dis-own all locations owned by this processor, causing to be freed
661 // any locations that it is (was) sole owner of
662 //TODO: implement VMS__malloc system, including "give up ownership"
665 //NOTE: initialData was given to the processor, so should either have
666 // been alloc'd with VMS__malloc, or freed by the level above animPr.
667 //So, all that's left to free here is the stack and the VirtProcr struc
668 // itself
669 //Note, should not stack-allocate initial data -- no guarantee, in
670 // general that creating processor will outlive ones it creates.
671 VMS__free( animatingPr->startOfStack );
672 VMS__free( animatingPr );
673 }
676 //TODO: look at architecting cleanest separation between request handler
677 // and master loop, for dissipate, create, shutdown, and other non-semantic
678 // requests. Issue is chain: one removes requests from AppVP, one dispatches
679 // on type of request, and one handles each type.. but some types require
680 // action from both request handler and master loop -- maybe just give the
681 // request handler calls like: VMS__handle_X_request_type
684 /*This is called by the semantic layer's request handler when it decides its
685 * time to shut down the VMS system. Calling this causes the core loop OS
686 * threads to exit, which unblocks the entry-point function that started up
687 * VMS, and allows it to grab the result and return to the original single-
688 * threaded application.
689 *
690 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
691 * and-wait function has to free a bunch of stuff after it detects the
692 * threads have all died: the masterEnv, the thread-related locations,
693 * masterVP any AppVPs that might still be allocated and sitting in the
694 * semantic environment, or have been orphaned in the _VMSWorkQ.
695 *
696 *NOTE: the semantic plug-in is expected to use VMS__malloc to get all the
697 * locations it needs, and give ownership to masterVP. Then, they will be
698 * automatically freed.
699 *
700 *In here,create one core-loop shut-down processor for each core loop and put
701 * them all directly into the readyToAnimateQ.
702 *Note, this function can ONLY be called after the semantic environment no
703 * longer cares if AppVPs get animated after the point this is called. In
704 * other words, this can be used as an abort, or else it should only be
705 * called when all AppVPs have finished dissipate requests -- only at that
706 * point is it sure that all results have completed.
707 */
708 void
709 VMS__shutdown()
710 { int coreIdx;
711 VirtProcr *shutDownPr;
713 //create the shutdown processors, one for each core loop -- put them
714 // directly into the Q -- each core will die when gets one
715 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
716 { //Note, this is running in the master
717 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
718 writeVMSQ( shutDownPr, _VMSMasterEnv->readyToAnimateQs[coreIdx] );
719 }
720 #ifdef MEAS__PERF_COUNTERS
721 uint64 tmpc,tmpi;
722 saveCyclesAndInstrs(0,tmpc,tmpi);
723 printf("End: cycles = %lu, instrs = %lu\n",tmpc,tmpi);
724 prctl(PR_TASK_PERF_EVENTS_DISABLE);
725 /*
726 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ ){
727 close(_VMSMasterEnv->cycles_counter_fd[coreIdx]);
728 close(_VMSMasterEnv->instrs_counter_fd[coreIdx]);
729 }
730 */
731 #endif
732 }
735 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
736 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
737 *This function has the sole purpose of setting the stack and framePtr
738 * to the coreLoop's stack and framePtr.. it does that then jumps to the
739 * core loop's shutdown point -- might be able to just call Pthread_exit
740 * from here, but am going back to the pthread's stack and setting everything
741 * up just as if it never jumped out, before calling pthread_exit.
742 *The end-point of core loop will free the stack and so forth of the
743 * processor that animates this function, (this fn is transfering the
744 * animator of the AppVP that is in turn animating this function over
745 * to core loop function -- note that this slices out a level of virtual
746 * processors).
747 */
748 void
749 endOSThreadFn( void *initData, VirtProcr *animatingPr )
750 {
751 #ifdef SEQUENTIAL
752 asmTerminateCoreLoopSeq(animatingPr);
753 #else
754 asmTerminateCoreLoop(animatingPr);
755 #endif
756 }
759 /*This is called from the startup & shutdown
760 */
761 void
762 VMS__cleanup_at_end_of_shutdown()
763 {
764 //unused
765 //VMSQueueStruc **readyToAnimateQs;
766 //int coreIdx;
767 //VirtProcr **masterVPs;
768 //SchedSlot ***allSchedSlots; //ptr to array of ptrs
770 //Before getting rid of everything, print out any measurements made
771 //forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, (DynArrayFnPtr)&printHist );
772 //forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, (DynArrayFnPtr)&saveHistToFile);
773 //forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, &freeHistExt );
774 #ifdef MEAS__TIME_PLUGIN
775 printHist( _VMSMasterEnv->reqHdlrLowTimeHist );
776 saveHistToFile( _VMSMasterEnv->reqHdlrHighTimeHist );
777 printHist( _VMSMasterEnv->reqHdlrHighTimeHist );
778 saveHistToFile( _VMSMasterEnv->reqHdlrHighTimeHist );
779 freeHistExt( _VMSMasterEnv->reqHdlrLowTimeHist );
780 freeHistExt( _VMSMasterEnv->reqHdlrHighTimeHist );
781 #endif
782 #ifdef MEAS__TIME_MALLOC
783 printHist( _VMSMasterEnv->mallocTimeHist );
784 saveHistToFile( _VMSMasterEnv->mallocTimeHist );
785 printHist( _VMSMasterEnv->freeTimeHist );
786 saveHistToFile( _VMSMasterEnv->freeTimeHist );
787 freeHistExt( _VMSMasterEnv->mallocTimeHist );
788 freeHistExt( _VMSMasterEnv->freeTimeHist );
789 #endif
790 #ifdef MEAS__TIME_MASTER_LOCK
791 printHist( _VMSMasterEnv->masterLockLowTimeHist );
792 printHist( _VMSMasterEnv->masterLockHighTimeHist );
793 #endif
794 #ifdef MEAS__TIME_MASTER
795 printHist( _VMSMasterEnv->pluginTimeHist );
796 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
797 {
798 freeVMSQ( readyToAnimateQs[ coreIdx ] );
799 //master VPs were created external to VMS, so use external free
800 VMS__dissipate_procr( masterVPs[ coreIdx ] );
802 freeSchedSlots( allSchedSlots[ coreIdx ] );
803 }
804 #endif
805 #ifdef MEAS__TIME_STAMP_SUSP
806 printHist( _VMSMasterEnv->pluginTimeHist );
807 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
808 {
809 freeVMSQ( readyToAnimateQs[ coreIdx ] );
810 //master VPs were created external to VMS, so use external free
811 VMS__dissipate_procr( masterVPs[ coreIdx ] );
813 freeSchedSlots( allSchedSlots[ coreIdx ] );
814 }
815 #endif
817 //All the environment data has been allocated with VMS__malloc, so just
818 // free its internal big-chunk and all inside it disappear.
819 /*
820 readyToAnimateQs = _VMSMasterEnv->readyToAnimateQs;
821 masterVPs = _VMSMasterEnv->masterVPs;
822 allSchedSlots = _VMSMasterEnv->allSchedSlots;
824 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
825 {
826 freeVMSQ( readyToAnimateQs[ coreIdx ] );
827 //master VPs were created external to VMS, so use external free
828 VMS__dissipate_procr( masterVPs[ coreIdx ] );
830 freeSchedSlots( allSchedSlots[ coreIdx ] );
831 }
833 VMS__free( _VMSMasterEnv->readyToAnimateQs );
834 VMS__free( _VMSMasterEnv->masterVPs );
835 VMS__free( _VMSMasterEnv->allSchedSlots );
837 //============================= MEASUREMENT STUFF ========================
838 #ifdef STATS__TURN_ON_PROBES
839 freeDynArrayDeep( _VMSMasterEnv->dynIntervalProbesInfo, &VMS__free_probe);
840 #endif
841 //========================================================================
842 */
843 //These are the only two that use system free
844 VMS_ext__free_free_list( _VMSMasterEnv->freeListHead );
845 free( (void *)_VMSMasterEnv );
846 }
849 //================================
852 /*Later, improve this -- for now, just exits the application after printing
853 * the error message.
854 */
855 void
856 VMS__throw_exception( char *msgStr, VirtProcr *reqstPr, VMSExcp *excpData )
857 {
858 printf("%s",msgStr);
859 fflush(stdin);
860 exit(1);
861 }