From: Feifei Wang <feifei.wang2@arm.com>
To: Beilei Xing <beilei.xing@intel.com>
Cc: dev@dpdk.org, nd@arm.com, Feifei Wang <feifei.wang2@arm.com>,
Ruifeng Wang <ruifeng.wang@arm.com>
Subject: [PATCH v3] net/i40e: reduce redundant reset operation
Date: Thu, 27 Jan 2022 15:40:01 +0800 [thread overview]
Message-ID: <20220127074001.831092-1-feifei.wang2@arm.com> (raw)
In-Reply-To: <20211220055039.4035627-1-feifei.wang2@arm.com>
For free buffer operation in i40e vector path, it is unnecessary to
store 'NULL' into txep.mbuf. This is because when putting mbuf into Tx
queue, tx_tail is the sentinel. And when doing tx_free, tx_next_dd is
the sentinel. In all processes, mbuf==NULL is not a condition in check.
Thus reset of mbuf is unnecessary and can be omitted.
Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
v2: remove the change for scalar path due to scalar path needs to check
whether the mbuf is 'NULL' to release and clean up (Haiyue)
v3: add comments to remind reset mbuf is unnecessary here (Qi Zhang)
drivers/net/i40e/i40e_rxtx_vec_common.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/i40e/i40e_rxtx_vec_common.h b/drivers/net/i40e/i40e_rxtx_vec_common.h
index f9a7f46550..959832ed6a 100644
--- a/drivers/net/i40e/i40e_rxtx_vec_common.h
+++ b/drivers/net/i40e/i40e_rxtx_vec_common.h
@@ -103,7 +103,7 @@ i40e_tx_free_bufs(struct i40e_tx_queue *txq)
if (txq->offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) {
for (i = 0; i < n; i++) {
free[i] = txep[i].mbuf;
- txep[i].mbuf = NULL;
+ /* no need to reset txep[i].mbuf in vector path */
}
rte_mempool_put_bulk(free[0]->pool, (void **)free, n);
goto done;
--
2.25.1
next prev parent reply other threads:[~2022-01-27 7:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-20 5:50 [PATCH 0/3] reduce redundant store operation for Tx free Feifei Wang
2021-12-20 5:50 ` [PATCH 1/3] net/i40e: reduce redundant store operation Feifei Wang
2021-12-20 5:50 ` [PATCH 2/3] net/ice: " Feifei Wang
2021-12-20 5:50 ` [PATCH 3/3] net/ixgbe: " Feifei Wang
2021-12-20 7:24 ` Wang, Haiyue
2021-12-21 6:55 ` 回复: " Feifei Wang
2022-01-27 7:40 ` Feifei Wang [this message]
2022-01-28 6:54 ` [PATCH v3] net/i40e: reduce redundant reset operation Zhang, Qi Z
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