[PATCH v8 08/21] malloc: add name to malloc heaps

[Anatoly Burakov <anatoly.burakov@intel.com>]

We will need to refer to external heaps in some way. While we use
heap ID's internally, for external API use it has to be something
more user-friendly. So, we will be using a string to uniquely
identify a heap.

This breaks the ABI, so document the change.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 doc/guides/rel_notes/release_18_11.rst          |  2 ++
 lib/librte_eal/common/include/rte_malloc_heap.h |  2 ++
 lib/librte_eal/common/malloc_heap.c             | 17 ++++++++++++++++-
 lib/librte_eal/common/rte_malloc.c              |  1 +
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_18_11.rst b/doc/guides/rel_notes/release_18_11.rst
index 9583f3eda..a6bddaaf4 100644
--- a/doc/guides/rel_notes/release_18_11.rst
+++ b/doc/guides/rel_notes/release_18_11.rst
@@ -156,6 +156,8 @@ ABI Changes
            ID the malloc heap belongs to
          - structure ``rte_mem_config`` has had its ``malloc_heaps`` array
            resized from ``RTE_MAX_NUMA_NODES`` to ``RTE_MAX_HEAPS`` value
+         - structure ``rte_malloc_heap`` now has a ``heap_name`` member
+
 
 Removed Items
 -------------
diff --git a/lib/librte_eal/common/include/rte_malloc_heap.h b/lib/librte_eal/common/include/rte_malloc_heap.h
index e7ac32d42..1c08ef3e0 100644
--- a/lib/librte_eal/common/include/rte_malloc_heap.h
+++ b/lib/librte_eal/common/include/rte_malloc_heap.h
@@ -12,6 +12,7 @@
 
 /* Number of free lists per heap, grouped by size. */
 #define RTE_HEAP_NUM_FREELISTS  13
+#define RTE_HEAP_NAME_MAX_LEN 32
 
 /* dummy definition, for pointers */
 struct malloc_elem;
@@ -28,6 +29,7 @@ struct malloc_heap {
 	unsigned alloc_count;
 	size_t total_size;
 	unsigned int socket_id;
+	char name[RTE_HEAP_NAME_MAX_LEN];
 } __rte_cache_aligned;
 
 #endif /* _RTE_MALLOC_HEAP_H_ */
diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c
index 09b06061d..b28905817 100644
--- a/lib/librte_eal/common/malloc_heap.c
+++ b/lib/librte_eal/common/malloc_heap.c
@@ -131,7 +131,6 @@ malloc_add_seg(const struct rte_memseg_list *msl,
 	malloc_heap_add_memory(heap, found_msl, ms->addr, len);
 
 	heap->total_size += len;
-	heap->socket_id = msl->socket_id;
 
 	RTE_LOG(DEBUG, EAL, "Added %zuM to heap on socket %i\n", len >> 20,
 			msl->socket_id);
@@ -1024,6 +1023,22 @@ int
 rte_eal_malloc_heap_init(void)
 {
 	struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+	unsigned int i;
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		/* assign names to default DPDK heaps */
+		for (i = 0; i < rte_socket_count(); i++) {
+			struct malloc_heap *heap = &mcfg->malloc_heaps[i];
+			char heap_name[RTE_HEAP_NAME_MAX_LEN];
+			int socket_id = rte_socket_id_by_idx(i);
+
+			snprintf(heap_name, sizeof(heap_name) - 1,
+					"socket_%i", socket_id);
+			strlcpy(heap->name, heap_name, RTE_HEAP_NAME_MAX_LEN);
+			heap->socket_id = socket_id;
+		}
+	}
+
 
 	if (register_mp_requests()) {
 		RTE_LOG(ERR, EAL, "Couldn't register malloc multiprocess actions\n");
diff --git a/lib/librte_eal/common/rte_malloc.c b/lib/librte_eal/common/rte_malloc.c
index 9ba1472c3..72632da56 100644
--- a/lib/librte_eal/common/rte_malloc.c
+++ b/lib/librte_eal/common/rte_malloc.c
@@ -202,6 +202,7 @@ rte_malloc_dump_stats(FILE *f, __rte_unused const char *type)
 		malloc_heap_get_stats(heap, &sock_stats);
 
 		fprintf(f, "Heap id:%u\n", heap_id);
+		fprintf(f, "\tHeap name:%s\n", heap->name);
 		fprintf(f, "\tHeap_size:%zu,\n", sock_stats.heap_totalsz_bytes);
 		fprintf(f, "\tFree_size:%zu,\n", sock_stats.heap_freesz_bytes);
 		fprintf(f, "\tAlloc_size:%zu,\n", sock_stats.heap_allocsz_bytes);
-- 
2.17.1