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From: "Wei Hu (Xavier)" <xavier.huwei@tom.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 8/9] net/hns3: remove the unnecessary assignment
Date: Mon,  2 Dec 2019 10:51:25 +0800
Message-ID: <20191202025126.73423-9-xavier.huwei@tom.com> (raw)
In-Reply-To: <20191202025126.73423-1-xavier.huwei@tom.com>

From: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>

This patch removes the unncessary assignment in hns3_xmit_pkts function
to avoid performance loss.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_rxtx.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 0090cda31..18c07b85e 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1612,7 +1612,6 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 	struct rte_mbuf *m_seg;
 	struct rte_mbuf *temp;
 	uint32_t nb_hold = 0;
-	uint16_t tx_next_clean;
 	uint16_t tx_next_use;
 	uint16_t tx_bd_ready;
 	uint16_t tx_pkt_num;
@@ -1627,11 +1626,8 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 	if (tx_bd_ready == 0)
 		return 0;
 
-	tx_next_clean = txq->next_to_clean;
 	tx_next_use   = txq->next_to_use;
 	tx_bd_max     = txq->nb_tx_desc;
-	tx_bak_pkt = &txq->sw_ring[tx_next_clean];
-
 	tx_pkt_num = (tx_bd_ready < nb_pkts) ? tx_bd_ready : nb_pkts;
 
 	/* send packets */
@@ -1707,7 +1703,6 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 
 	if (likely(nb_tx)) {
 		hns3_queue_xmit(txq, nb_hold);
-		txq->next_to_clean = tx_next_clean;
 		txq->tx_bd_ready   = tx_bd_ready - nb_hold;
 	}
 
-- 
2.23.0


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-02  2:51 [dpdk-dev] [PATCH 0/9] updates for hns3 PMD driver Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 1/9] net/hns3: support Rx interrupt Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 2/9] net/hns3: get link state change through mailbox Wei Hu (Xavier)
2019-12-03 13:16   ` Ferruh Yigit
2019-12-03 13:19     ` Ferruh Yigit
2019-12-14 10:12       ` Wei Hu (Xavier)
2019-12-14 10:26     ` Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 3/9] net/hns3: modify the return value of enable msix Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 4/9] net/hns3: modify custom macro Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 5/9] net/hns3: optimize RSS's default algorithm Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 6/9] net/hns3: remove the redundant function call Wei Hu (Xavier)
2019-12-02  2:51 ` [dpdk-dev] [PATCH 7/9] net/hns3: remove the redundant variable initialization Wei Hu (Xavier)
2019-12-02  2:51 ` Wei Hu (Xavier) [this message]
2019-12-02  2:51 ` [dpdk-dev] [PATCH 9/9] net/hns3: remove the unused macros Wei Hu (Xavier)

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