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From: Balazs Nemeth <bnemeth@redhat.com>
To: bnemeth@redhat.com, dev@dpdk.org
Cc: dsinghrawat@marvell.com, rmody@marvell.com,
	jerinjacobk@gmail.com, irusskikh@marvell.com
Subject: [dpdk-dev] [PATCH v2 5/7] net/qede: prefetch hardware consumer
Date: Fri, 26 Mar 2021 12:01:28 +0100
Message-ID: <3aed2588b66f2b584237bf6037d71e8b4c791d3e.1616754844.git.bnemeth@redhat.com> (raw)
In-Reply-To: <cover.1616754844.git.bnemeth@redhat.com>

Ensure that, while ecore_chain_get_cons_idx is running, txq->hw_cons_ptr
is prefetched. This shows a slight performance improvement.

Signed-off-by: Balazs Nemeth <bnemeth@redhat.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
---
 drivers/net/qede/qede_rxtx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c
index f439ee056..4f58abfbf 100644
--- a/drivers/net/qede/qede_rxtx.c
+++ b/drivers/net/qede/qede_rxtx.c
@@ -896,6 +896,7 @@ qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
 	uint16_t first_idx;
 
 	rte_compiler_barrier();
+	rte_prefetch0(txq->hw_cons_ptr);
 	sw_tx_cons = ecore_chain_get_cons_idx(&txq->tx_pbl);
 	hw_bd_cons = rte_le_to_cpu_16(*txq->hw_cons_ptr);
 #ifdef RTE_LIBRTE_QEDE_DEBUG_TX
-- 
2.30.2


  parent reply	other threads:[~2021-03-26 11:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26 11:01 [dpdk-dev] [PATCH v2 0/7] Optimize qede use of Rx/Tx entries Balazs Nemeth
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 1/7] net/qede: remove flags from Tx entry Balazs Nemeth
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 2/7] net/qede: get consumer index once Balazs Nemeth
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 3/7] net/qede: assume mbuf to free is never null Balazs Nemeth
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 4/7] net/qede: free packets in bulk instead of one by one Balazs Nemeth
2021-03-26 11:01 ` Balazs Nemeth [this message]
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 6/7] net/qede: prefetch next packet to free Balazs Nemeth
2021-03-26 11:01 ` [dpdk-dev] [PATCH v2 7/7] net/qede: remove unnecessary field in Rx entry and simplify Balazs Nemeth
2021-03-27 14:02 ` [dpdk-dev] [PATCH v2 0/7] Optimize qede use of Rx/Tx entries Jerin Jacob

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