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Experimenting with gradual heap growth

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Justin Ethier 2016-04-12 23:10:21 -04:00
parent 89881e901a
commit 0de7c6b98b
2 changed files with 29 additions and 7 deletions
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30
gc.c
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@ -382,10 +382,32 @@ int gc_grow_heap(gc_heap *h, size_t size, size_t chunk_size)
size_t cur_size, new_size;
gc_heap *h_last, *h_new;
pthread_mutex_lock(&heap_lock);
h_last = gc_heap_last(h);
cur_size = h_last->size;
// JAE - For now, just add a new page
new_size = cur_size; //gc_heap_align(((cur_size > size) ? cur_size : size) * 2);
// TODO: experiment with
// 1) growing heap gradually using a fibonnaci sequence growth
// 2) cap at HEAP_SIZE
// 3) allocate larger pages if heap aligned size is > page size?
{
size_t prev_size = 0;
new_size = 0;
h_last = h;
while (h_last->next) {
if (new_size < HEAP_SIZE){
new_size = prev_size + h_last->size;
prev_size = h_last->size;
} else {
new_size = HEAP_SIZE;
}
h_last = h_last->next;
}
if (new_size == 0)
new_size = h_last->size;
//fprintf(stderr, "Growing heap new page size = %zu\n", new_size);
}
// OLD code:
// h_last = gc_heap_last(h);
// cur_size = h_last->size;
// new_size = cur_size; //gc_heap_align(((cur_size > size) ? cur_size : size) * 2);
// END TODO
h_new = gc_heap_create(new_size, h_last->max_size, chunk_size);
h_last->next = h_new;
pthread_mutex_unlock(&heap_lock);

6
runtime.c
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@ -166,9 +166,9 @@ void gc_init_heap(long heap_size)
{
Cyc_heap = malloc(sizeof(gc_heap_root));
Cyc_heap->heap = gc_heap_create(heap_size, 0, 0);
Cyc_heap->small_obj_heap = gc_heap_create(heap_size, 0, 0);
Cyc_heap->medium_obj_heap = gc_heap_create(heap_size, 0, 0);
Cyc_heap->heap = gc_heap_create(1 * 1024 * 1024, 0, 0);
Cyc_heap->small_obj_heap = gc_heap_create(1 * 1024 * 1024, 0, 0);
Cyc_heap->medium_obj_heap = gc_heap_create(1 * 1024 * 1024, 0, 0);
if (!ck_hs_init(&symbol_table,
CK_HS_MODE_OBJECT | CK_HS_MODE_SPMC,