Comments on previous versions of this patch:
http://dpdk.org/ml/archives/dev/2014-May/002297.html
http://dpdk.org/ml/archives/dev/2014-June/003518.html
Additional changes from original to v3:
* Reduce the minimum-sized block that we put on a free list when
splitting a larger block, from 192 to 64. Although memory is
plentiful, why waste 64 and 128-byte (plus overhead) blocks?
-#define MIN_DATA_SIZE (CACHE_LINE_SIZE * 2)
+#define MIN_DATA_SIZE (CACHE_LINE_SIZE)
- if (old_elem_size <= MALLOC_ELEM_OVERHEAD + MIN_DATA_SIZE){
+ if (old_elem_size < MALLOC_ELEM_OVERHEAD + MIN_DATA_SIZE){
- if (elem->size - new_size > MIN_DATA_SIZE + MALLOC_ELEM_OVERHEAD){
+ if (elem->size - new_size >= MIN_DATA_SIZE + MALLOC_ELEM_OVERHEAD){
Changes from v2 to v3:
* Change the size ranges of the five free lists per heap. The first
list will effectively contain blocks of size [64,256].
- * heap->free_head[0] - (0 , 2^7]
- * heap->free_head[1] - (2^7 , 2^9]
- * heap->free_head[2] - (2^9 , 2^11]
- * heap->free_head[3] - (2^11, 2^13]
- * heap->free_head[4] - (2^13, MAX_SIZE]
+ * heap->free_head[0] - (0 , 2^8]
+ * heap->free_head[1] - (2^8 , 2^10]
+ * heap->free_head[2] - (2^10 ,2^12]
+ * heap->free_head[3] - (2^12, 2^14]
+ * heap->free_head[4] - (2^14, MAX_SIZE]
- #define MALLOC_MINSIZE_LOG2 7
+ #define MALLOC_MINSIZE_LOG2 8
* Fix typos and false assumptions in malloc unit tests. Even without
linked-list enhancements to lib rte_malloc, malloc autotest fails
every second (2nd) run.
