On Sun, Sep 24, 2023 at 8:19 PM Feifei Wang [off-list ref] 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 <redacted>
Suggested-by: Ruifeng Wang <redacted>
Signed-off-by: Feifei Wang <redacted>
Reviewed-by: Ruifeng Wang <redacted>
Reviewed-by: Honnappa Nagarahalli <redacted>
Acked-by: Morten Brørup <redacted>
Acked-by: Konstantin Ananyev <redacted>
Acked-by: Ferruh Yigit <redacted>

Acked-by: Ajit Khaparde <ajit.khaparde@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(-)