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mem: retry malloc with smaller block size when failure

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rte_malloc try to allocate memzone blocks with a minimum size.
It it fails, it retries for a smaller size than the standard one.
It will really fail if it cannot allocate block of the requested size.

Signed-off-by: Intel
This commit is contained in:
Intel 2013-09-18 12:00:00 +02:00 committed by Thomas Monjalon
parent 9b15ba895b
commit 7c60fd9ef6
1 changed files with 17 additions and 6 deletions
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23
lib/librte_malloc/malloc_heap.c
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@ -78,17 +78,28 @@ static int
malloc_heap_add_memzone(struct malloc_heap *heap, size_t size, unsigned align)
{
const unsigned mz_flags = 0;
const size_t min_size = get_malloc_memzone_size();
const size_t block_size = get_malloc_memzone_size();
/* ensure the data we want to allocate will fit in the memzone */
size_t mz_size = size + align + MALLOC_ELEM_OVERHEAD * 2;
if (mz_size < min_size)
mz_size = min_size;
const size_t min_size = size + align + MALLOC_ELEM_OVERHEAD * 2;
const struct rte_memzone *mz = NULL;
size_t mz_size = min_size;
if (mz_size < block_size)
mz_size = block_size;
char mz_name[RTE_MEMZONE_NAMESIZE];
rte_snprintf(mz_name, sizeof(mz_name), "MALLOC_S%u_HEAP_%u",
heap->numa_socket, heap->mz_count++);
const struct rte_memzone *mz = rte_memzone_reserve(mz_name, mz_size,
heap->numa_socket, mz_flags);
/* try getting a block. if we fail and we don't need as big a block
* as given in the config, we can shrink our request and try again
*/
do {
mz = rte_memzone_reserve(mz_name, mz_size,
heap->numa_socket, mz_flags);
if (mz == NULL)
mz_size /= 2;
} while (mz == NULL && mz_size > min_size);
if (mz == NULL)
return -1;