2 #include "structdefs.h"
3 #include "multicoregccompact.h"
4 #include "runtime_arch.h"
5 #include "multicoreruntime.h"
6 #include "multicoregarbage.h"
8 #include "multicoremem_helper.h"
11 int gc_countRunningCores() {
13 for(int i = 0; i < NUMCORES4GC; i++) {
21 void initOrig_Dst(struct moveHelper * orig,struct moveHelper * to) {
23 to->localblocknum = 0;
24 BASEPTR(to->base, BAMBOO_NUM_OF_CORE, to->localblocknum);
26 to->bound=to->base+BLOCKSIZE(to->localblocknum);
29 orig->localblocknum = 0;
30 orig->ptr=orig->base = to->base;
31 orig->bound=orig->base+BLOCKSIZE(orig->localblocknum);
33 to->pagebound=to->base+BAMBOO_PAGE_SIZE;
34 orig->pagebound=orig->base+BAMBOO_PAGE_SIZE;
38 void getSpaceLocally(struct moveHelper *to) {
39 //we have space on our core...just keep going
41 BASEPTR(to->base,BAMBOO_NUM_OF_CORE, to->localblocknum);
43 to->bound=to->base+BLOCKSIZE(to->localblocknum);
45 to->pagebound=to->base+BAMBOO_PAGE_SIZE;
49 //This function is called on the master core only...and typically by
50 //the message interrupt handler
52 void handleReturnMem_I(unsigned int cnum, void *heaptop) {
53 unsigned int blockindex;
54 BLOCKINDEX(blockindex, heaptop);
55 unsigned INTPTR localblocknum=GLOBALBLOCK2LOCAL(blockindex);
56 //this core is done as far as memory usage is concerned
59 struct blockrecord * blockrecord=&allocationinfo.blocktable[blockindex];
61 blockrecord->status=BS_FREE;
62 blockrecord->usedspace=(unsigned INTPTR)(heaptop-OFFSET2BASEVA(blockindex)-gcbaseva);
63 blockrecord->freespace=BLOCKSIZE(localblocknum)-blockrecord->usedspace;
64 /* Update the lowest free block */
65 if (blockindex < allocationinfo.lowestfreeblock) {
66 allocationinfo.lowestfreeblock=blockindex;
69 /* This is our own block...means we should mark other blocks above us as free*/
71 if (cnum==blockrecord->corenum) {
72 unsigned INTPTR nextlocalblocknum=localblocknum+1;
73 for(;nextlocalblocknum<numblockspercore;nextlocalblocknum++) {
74 unsigned INTPTR blocknum=BLOCKINDEX2(cnum, nextlocalblocknum);
75 struct blockrecord * nextblockrecord=&allocationinfo.blocktable[blocknum];
76 nextblockrecord->status=BS_FREE;
77 nextblockrecord->usedspace=0;
78 //this is true because this cannot be the lowest block
79 nextblockrecord->freespace=BLOCKSIZE(1);
83 //this could be the last one....
84 int count=gc_countRunningCores();
85 if (gcmovepending==count) {
86 // All cores have stopped...hand out memory as necessary to handle all requests
87 handleMemoryRequests_I();
89 //see if returned memory blocks let us resolve requests
90 useReturnedMem(cnum, allocationinfo.lowestfreeblock);
94 void useReturnedMem(unsigned int retcorenum, block_t localblockindex) {
95 for(int i=0;i<NUMCORES4GC;i++) {
96 unsigned INTPTR requiredmem=gcrequiredmems[i];
98 unsigned INTPTR desiredmem=maxusefulmems[i];
99 unsigned INTPTR threshold=(desiredmem<MINMEMORYCHUNKSIZE)? desiredmem: MINMEMORYCHUNKSIZE;
100 unsigned INTPTR memcheck=requiredmem>threshold?requiredmem:threshold;
103 for(block_t nextlocalblocknum=localblockindex;nextlocalblocknum<numblockspercore;nextlocalblocknum++) {
104 unsigned INTPTR blocknum=BLOCKINDEX2(retcorenum, nextlocalblocknum);
105 struct blockrecord * nextblockrecord=&allocationinfo.blocktable[blocknum];
106 if (nextblockrecord->status==BS_FREE) {
107 unsigned INTPTR freespace=nextblockrecord->freespace&~BAMBOO_CACHE_LINE_MASK;
108 if (freespace>=memcheck) {
109 nextblockrecord->status=BS_USED;
110 void *blockptr=OFFSET2BASEVA(blocknum)+gcbaseva;
111 unsigned INTPTR usedspace=((nextblockrecord->usedspace-1)&~BAMBOO_CACHE_LINE_MASK)+BAMBOO_CACHE_LINE_SIZE;
112 //taken care of one block
114 void *startaddr=blockptr+usedspace;
117 if (i==STARTUPCORE) {
119 gcmovestartaddr = startaddr;
120 } else if(BAMBOO_CHECK_SEND_MODE()) {
121 cache_msg_2_I(i,GCMOVESTART,startaddr);
123 send_msg_2_I(i,GCMOVESTART,startaddr);
132 void handleReturnMem(unsigned int cnum, void *heaptop) {
133 BAMBOO_ENTER_RUNTIME_MODE_FROM_CLIENT();
134 handleReturnMem_I(cnum, heaptop);
135 BAMBOO_ENTER_CLIENT_MODE_FROM_RUNTIME();
138 void getSpaceRemotely(struct moveHelper *to, unsigned int minimumbytes) {
139 //need to get another block from elsewhere
140 //set flag to wait for memory
142 if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
144 BAMBOO_ENTER_RUNTIME_MODE_FROM_CLIENT();
145 void *startaddr=handlegcfinishcompact_I(BAMBOO_NUM_OF_CORE, minimumbytes, gccurr_heaptop);
146 BAMBOO_ENTER_CLIENT_MODE_FROM_RUNTIME();
149 gcmovestartaddr=startaddr;
155 //send request for memory
156 send_msg_4(STARTUPCORE,GCFINISHCOMPACT,BAMBOO_NUM_OF_CORE, minimumbytes, gccurr_heaptop);
157 //wait for flag to be set that we received message
163 to->ptr = gcmovestartaddr;
165 //set localblock number to high number to indicate this block isn't local
166 to->localblocknum = MAXBLOCK;
167 unsigned int globalblocknum;
168 BLOCKINDEX(globalblocknum, to->ptr);
169 to->base = gcbaseva + OFFSET2BASEVA(globalblocknum);
170 to->bound=gcbaseva+BOUNDPTR(globalblocknum);
171 #ifdef GC_CACHE_ADAPT
172 to->pagebound=(void *)((int)((int)(to->ptr)&(~(BAMBOO_PAGE_SIZE-1)))+BAMBOO_PAGE_SIZE);
176 void getSpace(struct moveHelper *to, unsigned int minimumbytes) {
177 //need more space to compact into
178 if ((to->localblocknum+1) < gcblock2fill) {
181 getSpaceRemotely(to, minimumbytes);
185 void compacthelper(struct moveHelper * orig,struct moveHelper * to) {
186 bool senttopmessage=false;
188 if ((gccurr_heaptop <= ((unsigned INTPTR)(to->bound-to->ptr)))&&!senttopmessage) {
189 //This block is the last for this core...let the startup know
190 if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
191 handleReturnMem(BAMBOO_NUM_OF_CORE, to->ptr+gccurr_heaptop);
193 send_msg_3(STARTUPCORE, GCRETURNMEM, BAMBOO_NUM_OF_CORE, to->ptr+gccurr_heaptop);
195 //Only send the message once
198 unsigned int minimumbytes=COMPACTUNITS(orig, to);
199 if (orig->ptr==orig->bound) {
200 //need more data to compact
202 orig->localblocknum++;
203 BASEPTR(orig->base,BAMBOO_NUM_OF_CORE, orig->localblocknum);
204 orig->ptr=orig->base;
205 orig->bound=orig->base+BLOCKSIZE(orig->localblocknum);
206 #ifdef GC_CACHE_ADAPT
207 orig->pagebound=orig->base+BAMBOO_PAGE_SIZE;
209 if (orig->base >= gcbaseva+BAMBOO_SHARED_MEM_SIZE)
212 if (minimumbytes!=0) {
213 getSpace(to, minimumbytes);
216 if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
217 BAMBOO_ENTER_RUNTIME_MODE_FROM_CLIENT();
218 handlegcfinishcompact_I(BAMBOO_NUM_OF_CORE, 0, 0);
219 BAMBOO_ENTER_CLIENT_MODE_FROM_RUNTIME();
221 send_msg_4(STARTUPCORE,GCFINISHCOMPACT,BAMBOO_NUM_OF_CORE, 0, 0);
225 void * checkNeighbors_I(int ncorenum, unsigned INTPTR requiredmem, unsigned INTPTR desiredmem) {
226 int minblockindex=allocationinfo.lowestfreeblock/NUMCORES4GC;
227 unsigned INTPTR threshold=(desiredmem<MINMEMORYCHUNKSIZE)? desiredmem: MINMEMORYCHUNKSIZE;
228 unsigned INTPTR memcheck=requiredmem>threshold?requiredmem:threshold;
230 for(block_t lblock=minblockindex;lblock<numblockspercore;lblock++) {
231 for(int i=0;i<NUM_CORES2TEST;i++) {
232 int neighborcore=core2test[ncorenum][i];
233 if (neighborcore!=-1) {
234 block_t globalblockindex=BLOCKINDEX2(neighborcore, lblock);
235 struct blockrecord * block=&allocationinfo.blocktable[globalblockindex];
236 if (block->status==BS_FREE) {
237 unsigned INTPTR freespace=block->freespace&~BAMBOO_CACHE_LINE_MASK;
238 if (memcheck<=freespace) {
241 block->status=BS_USED;
242 void *blockptr=OFFSET2BASEVA(globalblockindex)+gcbaseva;
243 unsigned INTPTR usedspace=((block->usedspace-1)&~BAMBOO_CACHE_LINE_MASK)+BAMBOO_CACHE_LINE_SIZE;
244 return blockptr+usedspace;
253 void * globalSearch_I(unsigned int topblock, unsigned INTPTR requiredmem, unsigned INTPTR desiredmem) {
254 unsigned int firstfree=NOFREEBLOCK;
255 unsigned INTPTR threshold=(desiredmem<MINMEMORYCHUNKSIZE)? desiredmem: MINMEMORYCHUNKSIZE;
256 unsigned INTPTR memcheck=requiredmem>threshold?requiredmem:threshold;
258 for(block_t i=allocationinfo.lowestfreeblock;i<topblock;i++) {
259 struct blockrecord * block=&allocationinfo.blocktable[i];
260 if (block->status==BS_FREE) {
261 if(firstfree==NOFREEBLOCK)
263 unsigned INTPTR freespace=block->freespace&~BAMBOO_CACHE_LINE_MASK;
264 if (memcheck<=freespace) {
267 block->status=BS_USED;
268 void *blockptr=OFFSET2BASEVA(i)+gcbaseva;
269 unsigned INTPTR usedspace=((block->usedspace-1)&~BAMBOO_CACHE_LINE_MASK)+BAMBOO_CACHE_LINE_SIZE;
270 allocationinfo.lowestfreeblock=firstfree;
271 return blockptr+usedspace;
275 allocationinfo.lowestfreeblock=firstfree;
279 void handleOneMemoryRequest(int core, unsigned int lowestblock) {
280 unsigned INTPTR requiredmem=gcrequiredmems[core];
281 unsigned INTPTR desiredmem=maxusefulmems[core];
282 block_t firstfree=NOFREEBLOCK;
283 unsigned INTPTR threshold=(desiredmem<MINMEMORYCHUNKSIZE)? desiredmem: MINMEMORYCHUNKSIZE;
284 unsigned INTPTR memcheck=requiredmem>threshold?requiredmem:threshold;
286 for(block_t searchblock=lowestblock;searchblock<GCNUMBLOCK;searchblock++) {
287 struct blockrecord * block=&allocationinfo.blocktable[searchblock];
288 if (block->status==BS_FREE) {
289 if(firstfree==NOFREEBLOCK)
290 firstfree=searchblock;
291 //don't take a block from another core that hasn't returned its memory yet
292 if (block->corenum!=core&&returnedmem[block->corenum])
295 unsigned INTPTR freespace=block->freespace&~BAMBOO_CACHE_LINE_MASK;
296 if (freespace>=memcheck) {
297 //TODO: should check memory block at same level on our own core...if that works, use it to preserve locality
301 block->status=BS_USED;
302 void *blockptr=OFFSET2BASEVA(searchblock)+gcbaseva;
303 unsigned INTPTR usedspace=((block->usedspace-1)&~BAMBOO_CACHE_LINE_MASK)+BAMBOO_CACHE_LINE_SIZE;
304 allocationinfo.lowestfreeblock=firstfree;
305 //taken care of one block
307 void *startaddr=blockptr+usedspace;
308 if(BAMBOO_CHECK_SEND_MODE()) {
309 cache_msg_2_I(core,GCMOVESTART,startaddr);
311 send_msg_2_I(core,GCMOVESTART,startaddr);
317 //this is bad...ran out of memory
318 printf("Out of memory. Was trying for %u bytes\n", threshold);
322 void handleMemoryRequests_I() {
323 unsigned int lowestblock=allocationinfo.lowestfreeblock;
324 if (lowestblock==NOFREEBLOCK) {
325 lowestblock=numblockspercore*NUMCORES4GC;
328 for(int i=0;i < NUMCORES4GC; i++) {
329 if (gcrequiredmems[i]) {
330 handleOneMemoryRequest(i, lowestblock);
331 lowestblock=allocationinfo.lowestfreeblock;
336 /* should be invoked with interrupt turned off */
338 void * gcfindSpareMem_I(unsigned INTPTR requiredmem, unsigned INTPTR desiredmem,unsigned int requiredcore) {
339 if (allocationinfo.lowestfreeblock!=NOFREEBLOCK) {
340 //There are spare blocks
341 unsigned int topblock=numblockspercore*NUMCORES4GC;
344 if (memblock=checkNeighbors_I(requiredcore, requiredmem, desiredmem)) {
346 } else if (memblock=globalSearch_I(topblock, requiredmem, desiredmem)) {
351 // If we cannot find spare mem right now, hold the request
352 gcrequiredmems[requiredcore] = requiredmem;
353 maxusefulmems[requiredcore]=desiredmem;
356 int count=gc_countRunningCores();
357 if (gcmovepending==count) {
358 // All cores have stopped...hand out memory as necessary to handle all requests
359 handleMemoryRequests_I();
365 #ifdef GC_CACHE_ADAPT
366 unsigned int compactblockshelper(struct moveHelper * orig, struct moveHelper * to) {
367 unsigned int minimumbytes=0;
368 void *origptr=orig->ptr;
369 void *origbound=orig->bound;
370 void * tmporig=orig->ptr;
371 void * tmpto=to->ptr;
374 //call compactblocks using the page boundaries at the current bounds
375 minimumbytes=compactblocks(orig, to);
376 if(minimumbytes == 0) {
377 //bump the orig page bound...
378 //use old orig pointer to make sure we get correct block
379 CACHEADAPT_FINISH_SRC_PAGE(tmporig, tmpto, to->ptr);
380 if (orig->ptr<origbound) {
383 orig->pagebound=orig->pagebound+BAMBOO_PAGE_SIZE;
388 // require more memory
389 void *endtoptr=to->ptr+minimumbytes;
390 if (endtoptr>to->bound) {
391 CACHEADAPT_FINISH_DST_PAGE(orig->ptr, tmpto, to->ptr, 0);
394 CACHEADAPT_FINISH_DST_PAGE(orig->ptr, tmpto, to->ptr, minimumbytes);
395 to->pagebound=((endtoptr-1)&~(BAMBOO_PAGE_SIZE-1))+BAMBOO_PAGE_SIZE;
396 //update pointers to avoid double counting the stuff we already added in
397 tmporig=orig->ptr+minimumbytes;
398 tmpto=to->ptr+minimumbytes;
405 /* This function is performance critical... spend more time optimizing it */
407 unsigned int compactblocks(struct moveHelper * orig, struct moveHelper * to) {
408 void *toptrinit=to->ptr;
409 void *toptr=toptrinit;
410 void *origptr=orig->ptr;
411 #ifdef GC_CACHE_ADAPT
412 void *origbound=orig->pagebound;
413 void *tobound=to->pagebound;
415 void *origbound=orig->bound;
416 void *tobound=to->bound;
418 unsigned INTPTR origendoffset=ALIGNTOTABLEINDEX((unsigned INTPTR)(origbound-gcbaseva));
419 unsigned int objlength;
421 while(origptr<origbound) {
422 //Try to skip over stuff fast first
423 unsigned INTPTR offset=(unsigned INTPTR) (origptr-gcbaseva);
424 unsigned INTPTR arrayoffset=ALIGNTOTABLEINDEX(offset);
425 if (!gcmarktbl[arrayoffset]) {
428 if (arrayoffset>=origendoffset) {
429 //finished with block(a page in CACHE_ADAPT version)...
432 gccurr_heaptop-=(unsigned INTPTR)(toptr-toptrinit);
435 } while(!gcmarktbl[arrayoffset]);
436 origptr=CONVERTTABLEINDEXTOPTR(arrayoffset);
439 //Scan more carefully next
440 objlength=getMarkedLength(origptr);
442 if (objlength!=NOTMARKED) {
443 unsigned int length=ALIGNSIZETOBYTES(objlength);
445 //code between this and next comment should be removed
449 gettype_size(origptr, &type, &size);
450 size=((size-1)&(~(ALIGNMENTSIZE-1)))+ALIGNMENTSIZE;
453 tprintf("BAD SIZE IN BITMAP: type=%u object=%x size=%u length=%u\n", type, origptr, size, length);
454 unsigned INTPTR alignsize=ALIGNOBJSIZE((unsigned INTPTR)(origptr-gcbaseva));
455 unsigned INTPTR hibits=alignsize>>4;
456 unsigned INTPTR lobits=(alignsize&15)<<1;
457 tprintf("hibits=%x lobits=%x\n", hibits, lobits);
458 tprintf("hi=%x lo=%x\n", gcmarktbl[hibits], gcmarktbl[hibits+1]);
461 //end of code to remove
463 void *endtoptr=toptr+length;
464 if (endtoptr>tobound) {
465 gccurr_heaptop-=(unsigned INTPTR)(toptr-toptrinit);
470 //good to move objects and update pointers
472 gcmappingtbl[OBJMAPPINGINDEX(origptr)]=toptr;
477 origptr+=ALIGNMENTSIZE;
481 gccurr_heaptop-=(unsigned INTPTR)(toptr-toptrinit);
486 BAMBOO_ASSERT(COMPACTPHASE == gc_status_info.gcphase);
488 // initialize structs for compacting
489 struct moveHelper orig;
490 struct moveHelper to;
491 initOrig_Dst(&orig, &to);
493 CACHEADAPT_SAMPLING_DATA_REVISE_INIT(&orig, &to);
494 compacthelper(&orig, &to);
497 void master_compact() {
498 // predict number of blocks to fill for each core
499 numblockspercore = loadbalance()+1;
501 GC_PRINTF("mark phase finished \n");
503 gc_resetCoreStatus();
504 //initialize local data structures first....we don't want remote requests messing data up
505 unsigned int initblocks=numblockspercore*NUMCORES4GC;
506 allocationinfo.lowestfreeblock=NOFREEBLOCK;
509 for(int i=0;i<initblocks;i++) {
510 allocationinfo.blocktable[i].status=BS_USED;
514 for(int i=initblocks;i<GCNUMBLOCK;i++) {
515 allocationinfo.blocktable[i].status=BS_FREE;
516 allocationinfo.blocktable[i].usedspace=0;
517 //this is true because all cores have at least one block already...
518 allocationinfo.blocktable[i].freespace=BLOCKSIZE(1);
521 //start all of the cores
522 for(int i = 0; i < NUMCORES4GC; i++) {
523 // init some data strutures for compact phase
524 gcrequiredmems[i] = 0;
527 //send start compact messages to all cores
528 if(i != STARTUPCORE) {
529 send_msg_2(i, GCSTARTCOMPACT, numblockspercore);
531 gcblock2fill = numblockspercore;
537 /* wait for all cores to finish compacting */
540 while(!gc_checkCoreStatus())
544 void *nextvalid=gcbaseva;
545 for(void *tmp=gcbaseva; tmp<gcbaseva+BAMBOO_SHARED_MEM_SIZE;tmp+=ALIGNMENTSIZE) {
546 unsigned int objlength=getMarkedLength(tmp);
547 void *forwarding=gcmappingtbl[OBJMAPPINGINDEX(tmp)];
548 if (tmp>=nextvalid&&((objlength!=0)!=(forwarding!=NULL))) {
549 tprintf("Maps disagree tmp=%x olength=%u forwarding=%x\n",tmp, objlength, forwarding);
551 if (tmp<nextvalid&&forwarding!=NULL) {
552 tprintf("Weird forwarding pointer\n");
554 if (tmp>=nextvalid&&(objlength!=0||forwarding!=NULL)) {
555 unsigned int length=ALIGNSIZETOBYTES(objlength);
558 nextvalid=tmp+length;
559 gettype_size(tmp, &type, &size);
560 size=((size-1)&(~(ALIGNMENTSIZE-1)))+ALIGNMENTSIZE;
562 tprintf("Bad size in bitmap: tmp=%x length=%u size=%u type=%u\n", tmp, length, size, type);
565 BLOCKINDEX(blockindex, forwarding);
566 struct blockrecord * block=&allocationinfo.blocktable[blockindex];
567 void *blockptr=OFFSET2BASEVA(blockindex)+gcbaseva;
569 if (block->status==BS_FREE) {
570 if (forwarding>(blockptr+block->usedspace)) {
571 tprintf("Pointer references free space forwarding=%x tmp=%x length=%u type=%u blockindex=%u, baseptr=%x, usedspace=%u, status=%u\n", forwarding, tmp, length, type,blockindex, blockptr, block->usedspace, block->status);
580 //just in case we didn't get blocks back...
581 if (allocationinfo.lowestfreeblock==NOFREEBLOCK)
582 allocationinfo.lowestfreeblock=numblockspercore*NUMCORES4GC;
584 GC_PRINTF("compact phase finished \n");
587 #endif // MULTICORE_GC