回复: [PATCH v2] net/i40e: reduce redundant store operation

> -邮件原件- > 发件人: Zhang, Qi Z > 发送时间: Wednesday, January 26, 2022 10:28 PM > 收件人: Feifei Wang ; Xing, Beilei > > 抄送: dev@dpdk.org; Wang, Haiyue ; nd > ; Ruifeng Wang > 主题: RE: [PATCH v2] net/i40e: reduce redundant store operation > > > > >

RE: [PATCH v2] net/i40e: reduce redundant store operation

> -Original Message- > From: Feifei Wang > Sent: Tuesday, December 21, 2021 4:11 PM > To: Xing, Beilei > Cc: dev@dpdk.org; Wang, Haiyue ; n...@arm.com; > Feifei Wang ; Ruifeng Wang > > Subject: [PATCH v2] net/i40e: reduce redundant store operation > >

[PATCH v2] net/i40e: reduce redundant store operation

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