[PATCH v13 1/4] ethdev: add API for mbufs recycle mode

[Ajit Khaparde]

On Sun, Sep 24, 2023 at 8:19 PM Feifei Wang <feifei.wang2 at arm.com> wrote:
>
> 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.
>
> 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.
>
> Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
> Suggested-by: Ruifeng Wang <ruifeng.wang at arm.com>
> Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
> Acked-by: Morten Brørup <mb at smartsharesystems.com>
> Acked-by: Konstantin Ananyev <konstantin.v.ananyev at yandex.ru>
> Acked-by: Ferruh Yigit <ferruh.yigit at amd.com>
Acked-by: Ajit Khaparde <ajit.khaparde at broadcom.com>

> ---
>  doc/guides/rel_notes/release_23_11.rst |  15 +++
>  lib/ethdev/ethdev_driver.h             |  10 ++
>  lib/ethdev/ethdev_private.c            |   2 +
>  lib/ethdev/rte_ethdev.c                |  22 +++
>  lib/ethdev/rte_ethdev.h                | 180 +++++++++++++++++++++++++
>  lib/ethdev/rte_ethdev_core.h           |  23 +++-
>  lib/ethdev/version.map                 |   3 +
>  7 files changed, 249 insertions(+), 6 deletions(-)
>
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