Robust/src/Runtime/bamboo/pmc_garbage.c

   1 #include "multicoregc.h"
   2 #include "multicoreruntime.h"
   3 #include "pmc_garbage.h"
   4 #include "runtime_arch.h"
   5 #include "pmc_mark.h"
   6 #include "pmc_forward.h"
   7 #include "pmc_refupdate.h"
   8 #ifdef PERFCOUNT
   9 #include "bme_perf_counter.h"
  10 #endif
  11
  12 struct pmc_heap * pmc_heapptr;
  13 struct pmc_queue * pmc_localqueue;
  14 volatile bool gcflag;
  15
  16 void incrementthreads() {
  17   tmc_spin_mutex_lock(&pmc_heapptr->lock);
  18   pmc_heapptr->numthreads++;
  19   tmc_spin_mutex_unlock(&pmc_heapptr->lock);
  20 }
  21
  22 void decrementthreads() {
  23   tmc_spin_mutex_lock(&pmc_heapptr->lock);
  24   pmc_heapptr->numthreads--;
  25   tmc_spin_mutex_unlock(&pmc_heapptr->lock);
  26 }
  27
  28 void * pmc_unitend(unsigned int index) {
  29   return gcbaseva+(index+1)*UNITSIZE;
  30 }
  31
  32 void pmc_onceInit() {
  33   pmc_localqueue=&pmc_heapptr->regions[BAMBOO_NUM_OF_CORE].markqueue;
  34   pmc_queueinit(pmc_localqueue);
  35   if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
  36     tmc_spin_barrier_init(&pmc_heapptr->barrier, NUMCORES4GC);
  37     for(int i=0;i<NUMPMCUNITS;i++) {
  38       pmc_heapptr->units[i].endptr=pmc_unitend(i);
  39       //tprintf("Ch5: %u-> %x\n", i, pmc_heapptr->units[i].endptr);
  40     }
  41
  42     for(int i=0;i<NUMCORES4GC;i+=2) {
  43       if (i==0) {
  44         pmc_heapptr->regions[i].lastptr=gcbaseva;
  45       } else
  46         pmc_heapptr->regions[i].lastptr=pmc_heapptr->units[i*4-1].endptr;
  47       pmc_heapptr->regions[i].lowunit=4*i;
  48       pmc_heapptr->regions[i].highunit=4*(i+1);
  49       pmc_heapptr->regions[i+1].lastptr=pmc_heapptr->units[(i+1)*4+3].endptr;
  50       pmc_heapptr->regions[i+1].lowunit=4*(i+1);
  51       pmc_heapptr->regions[i+1].highunit=4*(i+2);
  52     }
  53     //for(int i=0;i<NUMCORES4GC;i++) {
  54       //tprintf("%u lastptr=%x\n", i, pmc_heapptr->regions[i].lastptr);
  55     //}
  56   }
  57 }
  58
  59 void pmc_init() {
  60   if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
  61     pmc_heapptr->numthreads=NUMCORES4GC;
  62     for(int i=0;i<NUMCORES4GC;i+=2) {
  63       void *startptr=pmc_heapptr->regions[i].lastptr;
  64       void *finishptr=pmc_heapptr->regions[i+1].lastptr;
  65       struct pmc_region *region=&pmc_heapptr->regions[i];
  66       unsigned int startindex=region->lowunit;
  67       unsigned int endindex=pmc_heapptr->regions[i+1].highunit;
  68       //tprintf("Free space in partition %u from %x to %x\n", i, startptr, finishptr);
  69       for(unsigned int index=startindex;index<endindex;index++) {
  70         void *ptr=pmc_heapptr->units[index].endptr;
  71         if ((ptr>startptr)&&(ptr<=finishptr)) {
  72           padspace(startptr, (unsigned int)(ptr-startptr));
  73           startptr=ptr;
  74         }
  75         if (ptr>finishptr) {
  76           padspace(startptr, (unsigned int) (finishptr-startptr));
  77           break;
  78         }
  79       }
  80     }
  81   }
  82   if (bamboo_smem_size) {
  83     //tprintf("Left over alloc space from %x to %x\n", bamboo_cur_msp, bamboo_cur_msp+bamboo_smem_size);
  84     padspace(bamboo_cur_msp, bamboo_smem_size);
  85   }
  86   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
  87 }
  88
  89 void gc(struct garbagelist *gl) {
  90 #ifdef PERFCOUNT
  91   profile_start(GC_REGION);
  92 #endif
  93   if (BAMBOO_NUM_OF_CORE==STARTUPCORE)
  94     tprintf("start GC\n");
  95   pmc_init();
  96   //mark live objects
  97   //tprintf("mark\n");
  98   pmc_mark(gl);
  99   //count live objects per unit
 100   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 101   //tprintf("count\n");
 102   pmc_count();
 103   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 104   //divide up work
 105   //tprintf("divide\n");
 106   if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
 107     pmc_processunits();
 108   }
 109   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 110   //set up forwarding pointers
 111   //tprintf("forward\n");
 112   pmc_doforward();
 113   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 114   //update pointers
 115   //tprintf("updaterefs\n");
 116   pmc_doreferenceupdate(gl);
 117   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 118   //compact data
 119   //tprintf("compact\n");
 120   pmc_docompact();
 121   //reset memory allocation
 122   bamboo_cur_msp=NULL;
 123   bamboo_smem_size=0;
 124   //tprintf("done\n");
 125
 126   //if (BAMBOO_NUM_OF_CORE==STARTUPCORE) {
 127     //    for(int i=0;i<NUMCORES4GC;i+=2) {
 128     //      void *startptr=pmc_heapptr->regions[i].lastptr;
 129     //      void *finishptr=pmc_heapptr->regions[i+1].lastptr;
 130     //      tprintf("Partition %u from %x to %x\n", i, startptr, finishptr);
 131     //      tprintf("%x %x %x %x\n", pmc_heapptr->regions[i].startptr, pmc_heapptr->regions[i].endptr, pmc_heapptr->regions[i+1].startptr, pmc_heapptr->regions[i+1].endptr);
 132     //    }
 133   //  }
 134
 135   gcflag=false;
 136   tmc_spin_barrier_wait(&pmc_heapptr->barrier);
 137
 138 #ifdef PERFCOUNT
 139   profile_start(APP_REGION);
 140 #endif
 141   //tprintf("exit GC\n");
 142 }
 143
 144 void padspace(void *ptr, unsigned int length) {
 145   //zero small blocks
 146   if (length<sizeof(struct ArrayObject)) {
 147     BAMBOO_MEMSET_WH(ptr,0,length);
 148   } else {
 149     //generate fake arrays for big blocks
 150     struct ArrayObject *ao=(struct ArrayObject *)ptr;
 151     ao->type=BYTEARRAYTYPE;
 152     unsigned arraylength=length-sizeof(struct ArrayObject);
 153     ao->___length___=arraylength;
 154     ao->marked=0;
 155   }
 156 }
 157
 158 void gettype_size(void * ptr, unsigned int * ttype, unsigned int * tsize) {
 159   int type = ((int *)ptr)[0];
 160   //  if (type>TOTALNUMCLASSANDARRAY) {
 161   //    tprintf("ptr=%x type=%u\n", ptr, type);
 162   //  }
 163
 164   if(type < NUMCLASSES) {
 165     // a normal object
 166     *tsize = classsize[type];
 167     *ttype = type;
 168   } else {
 169     // an array
 170     struct ArrayObject *ao=(struct ArrayObject *)ptr;
 171     unsigned int elementsize=classsize[type];
 172     unsigned int length=ao->___length___;
 173     *tsize = sizeof(struct ArrayObject)+length*elementsize;
 174     *ttype = type;
 175   }
 176 }