[dpdk-dev] [RFC PATCH 4/6] mempool: add a function to flush default cache

[Andrew Rybchenko <arybchenko@solarflare.com>]

From: "Artem V. Andreev" <Artem.Andreev@oktetlabs.ru>

Mempool get/put API cares about cache itself, but sometimes it is
required to flush the cache explicitly.

Also dedicated API allows to decouple it from block get API (to be
added) and provides more fine-grained control.

Signed-off-by: Artem V. Andreev <Artem.Andreev@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 lib/librte_mempool/rte_mempool.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 9bcb8b7..3a52b93 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -1161,6 +1161,22 @@ rte_mempool_default_cache(struct rte_mempool *mp, unsigned lcore_id)
 }
 
 /**
+ * Ensure that a default per-lcore mempool cache is flushed, if it is present
+ *
+ * @param mp
+ *   A pointer to the mempool structure.
+ */
+static __rte_always_inline void
+rte_mempool_ensure_cache_flushed(struct rte_mempool *mp)
+{
+	struct rte_mempool_cache *cache;
+	cache = rte_mempool_default_cache(mp, rte_lcore_id());
+	if (cache != NULL && cache->len > 0)
+		rte_mempool_cache_flush(cache, mp);
+}
+
+
+/**
  * @internal Put several objects back in the mempool; used internally.
  * @param mp
  *   A pointer to the mempool structure.
-- 
2.7.4