> -----Original Message-----
> From: Joyce Kong <joyce.k...@arm.com>
> Sent: Tuesday, May 17, 2022 6:51 PM
> Cc: Ruifeng Wang <ruifeng.w...@arm.com>; dev@dpdk.org; nd
> <n...@arm.com>; Joyce Kong <joyce.k...@arm.com>
> Subject: [PATCH v1 0/2] add a fast path for memif Rx/Tx
>
> For memif non-zero-copy mode, there is a branch to compare the mbuf and
> memif buffer size during memory copying. Add a fast memory copy path by
> removing this branch with mbuf and memif buffer size defined at compile
> time. And for Tx fast path, bulk free the mbufs which come from the same
> mempool.
>
> When mbuf == memif buffer size, both Rx/Tx would choose the fast
> memcpy path. When mbuf < memif buffer size, the Rx chooses previous
> memcpy path while Tx chooses fast memcpy path. When mbuf > memif
> buffer size, the Rx chooses fast memcpy path while Tx chooses previous
> memcpy path.
>
> Test with 1p1q on Ampere Altra AArch64 server,
> ---------------------------------------------------------
> buf size | memif = mbuf | memif < mbuf | memif > mbuf
> ---------------------------------------------------------
> non-zc gain | 16.95% | 3.28% | 13.29%
> ---------------------------------------------------------
> zc gain | 19.43% | 4.62% | 18.14%
> ---------------------------------------------------------
>
> Test with 1p1q on Cascade Lake Xeon X86server,
> ---------------------------------------------------------
> buf size | memif = mbuf | memif < mbuf | memif > mbuf
> ---------------------------------------------------------
> non-zc gain | 19.97% | 2.35% | 21.43%
> ---------------------------------------------------------
> zc gain | 14.30% | -1.21% | 11.98%
> ---------------------------------------------------------
>
> Joyce Kong (2):
> net/memif: add a Rx fast path
> net/memif: add a Tx fast path
>
> drivers/net/memif/rte_eth_memif.c | 258 ++++++++++++++++++++--------
> --
> 1 file changed, 176 insertions(+), 82 deletions(-)
>
> --
> 2.25.1
Series-reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
