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Issue #199 - More efficient memory usage

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Only use a single int on the heap to store the number of huge heap allocations. There is no need to track allocations on the other heaps, at least at this time.
This commit is contained in:
Justin Ethier 2017-05-10 10:12:25 +00:00
parent 95e15dd3c2
commit ea2550a882
2 changed files with 7 additions and 11 deletions
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16
gc.c
View file

@ -250,7 +250,6 @@ gc_heap *gc_heap_create(int heap_type, size_t size, size_t max_size,
//h->free_size = size;
ck_pr_add_ptr(&(thd->cached_heap_total_sizes[heap_type]), size);
ck_pr_add_ptr(&(thd->cached_heap_free_sizes[heap_type]), size);
// heap_num_allocations already initialized to 0, nothing else needed here
h->chunk_size = chunk_size;
h->max_size = max_size;
h->data = (char *)gc_heap_align(sizeof(h->data) + (uintptr_t) & (h->data));
@ -637,7 +636,7 @@ void *gc_try_alloc(gc_heap * h, int heap_type, size_t size, char *obj,
ck_pr_sub_ptr(&(thd->cached_heap_free_sizes[heap_type]),
gc_allocated_bytes(obj, NULL, NULL));
} else {
ck_pr_add_ptr(&(thd->heap_num_allocations[heap_type]), 1);
ck_pr_add_int(&(thd->heap_num_huge_allocations), 1);
}
h_passed->next_free = h;
h_passed->last_alloc_size = size;
@ -905,7 +904,7 @@ void gc_collector_sweep()
}
}
// Clear allocation counts to delay next GC trigger
ck_pr_store_ptr(&(m->heap_num_allocations[HEAP_HUGE]), 0);
ck_pr_store_int(&(m->heap_num_huge_allocations), 0);
#if GC_DEBUG_TRACE
total_size = ck_pr_load_ptr(&(m->cached_heap_total_sizes[HEAP_SM])) +
ck_pr_load_ptr(&(m->cached_heap_total_sizes[HEAP_64])) +
@ -1352,8 +1351,8 @@ void gc_mut_cooperate(gc_thread_data * thd, int buf_len)
#endif
(ck_pr_load_ptr(&(thd->cached_heap_free_sizes[HEAP_REST])) <
ck_pr_load_ptr(&(thd->cached_heap_total_sizes[HEAP_REST])) * GC_COLLECTION_THRESHOLD) ||
// Experimenting with separate huge heap threshold
(ck_pr_load_ptr(&(thd->heap_num_allocations[HEAP_HUGE])) > 100)
// Separate huge heap threshold since these are typically allocated as whole pages
(ck_pr_load_int(&(thd->heap_num_huge_allocations)) > 100)
)) {
#if GC_DEBUG_TRACE
fprintf(stderr,
@ -1935,7 +1934,6 @@ void gc_thread_data_init(gc_thread_data * thd, int mut_num, char *stack_base,
}
thd->cached_heap_free_sizes = calloc(5, sizeof(uintptr_t));
thd->cached_heap_total_sizes = calloc(5, sizeof(uintptr_t));
thd->heap_num_allocations = calloc(5, sizeof(uintptr_t));
thd->heap = calloc(1, sizeof(gc_heap_root));
thd->heap->heap = calloc(1, sizeof(gc_heap *) * NUM_HEAP_TYPES);
thd->heap->heap[HEAP_REST] = gc_heap_create(HEAP_REST, INITIAL_HEAP_SIZE, 0, 0, thd);
@ -1978,8 +1976,6 @@ void gc_thread_data_free(gc_thread_data * thd)
free(thd->cached_heap_free_sizes);
if (thd->cached_heap_total_sizes)
free(thd->cached_heap_total_sizes);
if (thd->heap_num_allocations)
free(thd->heap_num_allocations);
if (thd->jmp_start)
free(thd->jmp_start);
if (thd->gc_args)
@ -2031,10 +2027,10 @@ void gc_merge_all_heaps(gc_thread_data *dest, gc_thread_data *src)
ck_pr_load_ptr(&(src->cached_heap_total_sizes[heap_type])));
ck_pr_add_ptr(&(dest->cached_heap_free_sizes[heap_type]),
ck_pr_load_ptr(&(src->cached_heap_free_sizes[heap_type])));
ck_pr_add_ptr(&(dest->heap_num_allocations[heap_type]),
ck_pr_load_ptr(&(src->heap_num_allocations[heap_type])));
}
}
ck_pr_add_int(&(dest->heap_num_huge_allocations),
ck_pr_load_int(&(src->heap_num_huge_allocations)));
#ifdef GC_DEBUG_TRACE
fprintf(stderr, "Finished merging old heap data\n");
#endif

2
include/cyclone/types.h
View file

@ -289,7 +289,7 @@ struct gc_thread_data_t {
gc_heap_root *heap;
uintptr_t *cached_heap_free_sizes;
uintptr_t *cached_heap_total_sizes;
uintptr_t *heap_num_allocations;
int heap_num_huge_allocations;
// Data needed for call history
char **stack_traces;
int stack_trace_idx;