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Subject: RE: [PATCH v7 1/4] ethdev: add API for mbufs recycle mode
Date: Thu, 6 Jul 2023 15:19:56 +0200
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Thread-Topic: [PATCH v7 1/4] ethdev: add API for mbufs recycle mode
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References: <20230706095004.1848199-1-feifei.wang2@arm.com>
 <20230706095004.1848199-2-feifei.wang2@arm.com>
From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Feifei Wang" <feifei.wang2@arm.com>,
 "Thomas Monjalon" <thomas@monjalon.net>,
 "Ferruh Yigit" <ferruh.yigit@amd.com>,
 "Andrew Rybchenko" <andrew.rybchenko@oktetlabs.ru>
Cc: <dev@dpdk.org>, <konstantin.v.ananyev@yandex.ru>, <nd@arm.com>,
 "Honnappa Nagarahalli" <honnappa.nagarahalli@arm.com>,
 "Ruifeng Wang" <ruifeng.wang@arm.com>
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> From: Feifei Wang [mailto:feifei.wang2@arm.com]
> Sent: Thursday, 6 July 2023 11.50
>=20
> Add 'rte_eth_recycle_rx_queue_info_get' and 'rte_eth_recycle_mbufs'
> APIs to recycle used mbufs from a transmit queue of an Ethernet =
device,
> and move these mbufs into a mbuf ring for a receive queue of an =
Ethernet
> device. This can bypass mempool 'put/get' operations hence saving CPU
> cycles.
>=20
> For each recycling mbufs, the rte_eth_recycle_mbufs() function =
performs
> the following operations:
> - Copy used *rte_mbuf* buffer pointers from Tx mbuf ring into Rx mbuf
> ring.
> - Replenish the Rx descriptors with the recycling *rte_mbuf* mbufs =
freed
> from the Tx mbuf ring.
>=20
> Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Suggested-by: Ruifeng Wang <ruifeng.wang@arm.com>
> Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> ---

Acked-by: Morten Br=F8rup <mb@smartsharesystems.com>