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net/mlx5: optimize Rx buffer replenishment threshold

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Due to redundant calculation per every burst, performance drops a little.

Fixes: e10245a13b ("net/mlx5: fix Rx buffer replenishment threshold")
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
This commit is contained in:
Yongseok Koh 2018-11-15 10:29:20 +00:00 committed by Ferruh Yigit
parent 317e64739d
commit 545db54c7c
4 changed files with 5 additions and 2 deletions
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2
drivers/net/mlx5/mlx5_rxq.c
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@ -1468,6 +1468,8 @@ mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
tmpl->rxq.mp = mp;
tmpl->rxq.stats.idx = idx;
tmpl->rxq.elts_n = log2above(desc);
tmpl->rxq.rq_repl_thresh =
MLX5_VPMD_RXQ_RPLNSH_THRESH(1 << tmpl->rxq.elts_n);
tmpl->rxq.elts =
(struct rte_mbuf *(*)[1 << tmpl->rxq.elts_n])(tmpl + 1);
#ifndef RTE_ARCH_64

1
drivers/net/mlx5/mlx5_rxtx.h
View File

@ -101,6 +101,7 @@ struct mlx5_rxq_data {
uint16_t consumed_strd; /* Number of consumed strides in WQE. */
uint32_t rq_pi;
uint32_t cq_ci;
uint16_t rq_repl_thresh; /* Threshold for buffer replenishment. */
struct mlx5_mr_ctrl mr_ctrl; /* MR control descriptor. */
uint16_t mprq_max_memcpy_len; /* Maximum size of packet to memcpy. */
volatile void *wqes;

2
drivers/net/mlx5/mlx5_rxtx_vec_neon.h
View File

@ -732,7 +732,7 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n,
* N - (rq_ci - rq_pi) := # of buffers consumed (to be replenished).
*/
repl_n = q_n - (rxq->rq_ci - rxq->rq_pi);
if (repl_n >= MLX5_VPMD_RXQ_RPLNSH_THRESH(q_n))
if (repl_n >= rxq->rq_repl_thresh)
mlx5_rx_replenish_bulk_mbuf(rxq, repl_n);
/* See if there're unreturned mbufs from compressed CQE. */
rcvd_pkt = rxq->cq_ci - rxq->rq_pi;

2
drivers/net/mlx5/mlx5_rxtx_vec_sse.h
View File

@ -716,7 +716,7 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n,
* N - (rq_ci - rq_pi) := # of buffers consumed (to be replenished).
*/
repl_n = q_n - (rxq->rq_ci - rxq->rq_pi);
if (repl_n >= MLX5_VPMD_RXQ_RPLNSH_THRESH(q_n))
if (repl_n >= rxq->rq_repl_thresh)
mlx5_rx_replenish_bulk_mbuf(rxq, repl_n);
/* See if there're unreturned mbufs from compressed CQE. */
rcvd_pkt = rxq->cq_ci - rxq->rq_pi;