From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrien Mazarguil Subject: [PATCH v2 5/7] mlx5: avoid lkey retrieval for inlined packets Date: Mon, 22 Feb 2016 19:18:01 +0100 Message-ID: <1456165083-28316-6-git-send-email-adrien.mazarguil@6wind.com> References: <1454063573-1993-1-git-send-email-adrien.mazarguil@6wind.com> <1456165083-28316-1-git-send-email-adrien.mazarguil@6wind.com> To: dev@dpdk.org Return-path: Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by dpdk.org (Postfix) with ESMTP id A0F0B2E8B for ; Mon, 22 Feb 2016 19:18:33 +0100 (CET) Received: by mail-wm0-f41.google.com with SMTP id g62so168903428wme.0 for ; Mon, 22 Feb 2016 10:18:33 -0800 (PST) In-Reply-To: <1456165083-28316-1-git-send-email-adrien.mazarguil@6wind.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Nelio Laranjeiro Improves performance as the lkey is not needed by hardware in this case. Signed-off-by: Nelio Laranjeiro --- drivers/net/mlx5/mlx5_rxtx.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c index c84ec8c..b82017e 100644 --- a/drivers/net/mlx5/mlx5_rxtx.c +++ b/drivers/net/mlx5/mlx5_rxtx.c @@ -512,16 +512,6 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) /* Retrieve buffer information. */ addr = rte_pktmbuf_mtod(buf, uintptr_t); length = DATA_LEN(buf); - /* Retrieve Memory Region key for this memory pool. */ - lkey = txq_mp2mr(txq, txq_mb2mp(buf)); - if (unlikely(lkey == (uint32_t)-1)) { - /* MR does not exist. */ - DEBUG("%p: unable to get MP <-> MR" - " association", (void *)txq); - /* Clean up TX element. */ - elt->buf = NULL; - goto stop; - } /* Update element. */ elt->buf = buf; if (txq->priv->vf) @@ -545,12 +535,25 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) send_flags); else #endif + { + /* Retrieve Memory Region key for this + * memory pool. */ + lkey = txq_mp2mr(txq, txq_mb2mp(buf)); + if (unlikely(lkey == (uint32_t)-1)) { + /* MR does not exist. */ + DEBUG("%p: unable to get MP <-> MR" + " association", (void *)txq); + /* Clean up TX element. */ + elt->buf = NULL; + goto stop; + } err = txq->send_pending (txq->qp, addr, length, lkey, send_flags); + } if (unlikely(err)) goto stop; #ifdef MLX5_PMD_SOFT_COUNTERS -- 2.1.4