[PATCH 1/2] net/i40e: replace put function

[Kamalakshitha Aligeri]

Integrated zero-copy put API in mempool cache in i40e PMD.
On Ampere Altra server, l3fwd single core's performance improves by 5%
with the new API

Signed-off-by: Kamalakshitha Aligeri <kamalakshitha.aligeri at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
Reviewed-by: Feifei Wang <feifei.wang2 at arm.com>
---
Link: https://patchwork.dpdk.org/project/dpdk/patch/20221227151700.80887-1-mb@smartsharesystems.com/

 .mailmap                                |  1 +
 drivers/net/i40e/i40e_rxtx_vec_common.h | 34 ++++++++++++++++++++-----
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/.mailmap b/.mailmap
index 75884b6fe2..05a42edbcf 100644
--- a/.mailmap
+++ b/.mailmap
@@ -670,6 +670,7 @@ Kai Ji <kai.ji at intel.com>
 Kaiwen Deng <kaiwenx.deng at intel.com>
 Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
 Kamalakannan R <kamalakannan.r at intel.com>
+Kamalakshitha Aligeri <kamalakshitha.aligeri at arm.com>
 Kamil Bednarczyk <kamil.bednarczyk at intel.com>
 Kamil Chalupnik <kamilx.chalupnik at intel.com>
 Kamil Rytarowski <kamil.rytarowski at caviumnetworks.com>
diff --git a/drivers/net/i40e/i40e_rxtx_vec_common.h b/drivers/net/i40e/i40e_rxtx_vec_common.h
index fe1a6ec75e..80d4a159e6 100644
--- a/drivers/net/i40e/i40e_rxtx_vec_common.h
+++ b/drivers/net/i40e/i40e_rxtx_vec_common.h
@@ -95,17 +95,37 @@ i40e_tx_free_bufs(struct i40e_tx_queue *txq)

 	n = txq->tx_rs_thresh;

-	 /* first buffer to free from S/W ring is at index
-	  * tx_next_dd - (tx_rs_thresh-1)
-	  */
+	/* first buffer to free from S/W ring is at index
+	 * tx_next_dd - (tx_rs_thresh-1)
+	 */
 	txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];

 	if (txq->offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) {
-		for (i = 0; i < n; i++) {
-			free[i] = txep[i].mbuf;
-			/* no need to reset txep[i].mbuf in vector path */
+		struct rte_mempool *mp = txep[0].mbuf->pool;
+		struct rte_mempool_cache *cache = rte_mempool_default_cache(mp, rte_lcore_id());
+
+		if (!cache || n > RTE_MEMPOOL_CACHE_MAX_SIZE) {
+			for (i = 0; i < n ; i++)
+				free[i] = txep[i].mbuf;
+			if (!cache) {
+				rte_mempool_generic_put(mp, (void **)free, n, cache);
+				goto done;
+			}
+			if (n > RTE_MEMPOOL_CACHE_MAX_SIZE) {
+				rte_mempool_ops_enqueue_bulk(mp, (void **)free, n);
+				goto done;
+			}
+		}
+		void **cache_objs;
+
+		cache_objs = rte_mempool_cache_zc_put_bulk(cache, mp, n);
+		if (cache_objs) {
+			for (i = 0; i < n; i++) {
+				cache_objs[i] = txep->mbuf;
+				/* no need to reset txep[i].mbuf in vector path */
+				txep++;
+			}
 		}
-		rte_mempool_put_bulk(free[0]->pool, (void **)free, n);
 		goto done;
 	}

--
2.25.1