mempool: add iterator function

Add function to iterate over mempool.
Useful for diagnostic code that wants to look at mempool usage patterns.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index f6cbc7c..9a297e6 100644 (file)
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -856,3 +856,24 @@ rte_mempool_lookup(const char *name)
 
        return mp;
 }
+
+void rte_mempool_walk(void (*func)(const struct rte_mempool *, void *),
+                     void *arg)
+{
+       struct rte_mempool *mp = NULL;
+       struct rte_mempool_list *mempool_list;
+
+       if ((mempool_list =
+            RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_MEMPOOL, rte_mempool_list)) == NULL) {
+               rte_errno = E_RTE_NO_TAILQ;
+               return;
+       }
+
+       rte_rwlock_read_lock(RTE_EAL_MEMPOOL_RWLOCK);
+
+       TAILQ_FOREACH(mp, mempool_list, next) {
+               (*func)(mp, arg);
+       }
+
+       rte_rwlock_read_unlock(RTE_EAL_MEMPOOL_RWLOCK);
+}

diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 9739d7c..3fe5692 100644 (file)
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -1380,6 +1380,17 @@ size_t rte_mempool_xmem_size(uint32_t elt_num, size_t elt_sz,
 ssize_t rte_mempool_xmem_usage(void *vaddr, uint32_t elt_num, size_t elt_sz,
        const phys_addr_t paddr[], uint32_t pg_num, uint32_t pg_shift);
 
+/**
+ * Walk list of all memory pools
+ *
+ * @param func
+ *   Iterator function
+ * @param arg
+ *   Argument passed to iterator
+ */
+void rte_mempool_walk(void (*func)(const struct rte_mempool *, void *arg),
+                     void *arg);
+
 #ifdef __cplusplus
 }
 #endif