From: Yongseok Koh Date: Thu, 15 Nov 2018 10:29:16 +0000 (+0000) Subject: net/mlx4: optimize Tx external memory registration X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=1948776360d22ca09754982c7da8c75a032f3325;p=dpdk.git net/mlx4: optimize Tx external memory registration There's some performance drop due to extra condition checks on the datapath. Checking for external memory registration should be consolidated to the existing bottom-half. Fixes: 31912d992403 ("net/mlx4: support externally allocated static memory") Cc: stable@dpdk.org Signed-off-by: Yongseok Koh Acked-by: Shahaf Shuler --- diff --git a/drivers/net/mlx4/mlx4_mr.c b/drivers/net/mlx4/mlx4_mr.c index 726788a60d..a0094483ab 100644 --- a/drivers/net/mlx4/mlx4_mr.c +++ b/drivers/net/mlx4/mlx4_mr.c @@ -1042,7 +1042,7 @@ mlx4_rx_addr2mr_bh(struct rxq *rxq, uintptr_t addr) * @return * Searched LKey on success, UINT32_MAX on no match. */ -uint32_t +static uint32_t mlx4_tx_addr2mr_bh(struct txq *txq, uintptr_t addr) { struct mlx4_mr_ctrl *mr_ctrl = &txq->mr_ctrl; @@ -1053,6 +1053,32 @@ mlx4_tx_addr2mr_bh(struct txq *txq, uintptr_t addr) return mlx4_mr_addr2mr_bh(priv->dev, mr_ctrl, addr); } +/** + * Bottom-half of LKey search on Tx. If it can't be searched in the memseg + * list, register the mempool of the mbuf as externally allocated memory. + * + * @param txq + * Pointer to Tx queue structure. + * @param mb + * Pointer to mbuf. + * + * @return + * Searched LKey on success, UINT32_MAX on no match. + */ +uint32_t +mlx4_tx_mb2mr_bh(struct txq *txq, struct rte_mbuf *mb) +{ + uintptr_t addr = (uintptr_t)mb->buf_addr; + uint32_t lkey; + + lkey = mlx4_tx_addr2mr_bh(txq, addr); + if (lkey == UINT32_MAX && rte_errno == ENXIO) { + /* Mempool may have externally allocated memory. */ + return mlx4_tx_update_ext_mp(txq, addr, mlx4_mb2mp(mb)); + } + return lkey; +} + /** * Flush all of the local cache entries. * diff --git a/drivers/net/mlx4/mlx4_rxtx.h b/drivers/net/mlx4/mlx4_rxtx.h index 1be060cda1..d7ec4e0c5f 100644 --- a/drivers/net/mlx4/mlx4_rxtx.h +++ b/drivers/net/mlx4/mlx4_rxtx.h @@ -162,7 +162,7 @@ void mlx4_tx_queue_release(void *dpdk_txq); void mlx4_mr_flush_local_cache(struct mlx4_mr_ctrl *mr_ctrl); uint32_t mlx4_rx_addr2mr_bh(struct rxq *rxq, uintptr_t addr); -uint32_t mlx4_tx_addr2mr_bh(struct txq *txq, uintptr_t addr); +uint32_t mlx4_tx_mb2mr_bh(struct txq *txq, struct rte_mbuf *mb); uint32_t mlx4_tx_update_ext_mp(struct txq *txq, uintptr_t addr, struct rte_mempool *mp); @@ -176,7 +176,7 @@ uint32_t mlx4_tx_update_ext_mp(struct txq *txq, uintptr_t addr, * @return * Memory pool where data is located for given mbuf. */ -static struct rte_mempool * +static inline struct rte_mempool * mlx4_mb2mp(struct rte_mbuf *buf) { if (unlikely(RTE_MBUF_INDIRECT(buf))) @@ -225,9 +225,10 @@ mlx4_rx_addr2mr(struct rxq *rxq, uintptr_t addr) * Searched LKey on success, UINT32_MAX on no match. */ static __rte_always_inline uint32_t -mlx4_tx_addr2mr(struct txq *txq, uintptr_t addr) +mlx4_tx_mb2mr(struct txq *txq, struct rte_mbuf *mb) { struct mlx4_mr_ctrl *mr_ctrl = &txq->mr_ctrl; + uintptr_t addr = (uintptr_t)mb->buf_addr; uint32_t lkey; /* Check generation bit to see if there's any change on existing MRs. */ @@ -238,23 +239,8 @@ mlx4_tx_addr2mr(struct txq *txq, uintptr_t addr) MLX4_MR_CACHE_N, addr); if (likely(lkey != UINT32_MAX)) return lkey; - /* Take slower bottom-half (binary search) on miss. */ - return mlx4_tx_addr2mr_bh(txq, addr); -} - -static __rte_always_inline uint32_t -mlx4_tx_mb2mr(struct txq *txq, struct rte_mbuf *mb) -{ - uintptr_t addr = (uintptr_t)mb->buf_addr; - uint32_t lkey = mlx4_tx_addr2mr(txq, addr); - - if (likely(lkey != UINT32_MAX)) - return lkey; - if (rte_errno == ENXIO) { - /* Mempool may have externally allocated memory. */ - lkey = mlx4_tx_update_ext_mp(txq, addr, mlx4_mb2mp(mb)); - } - return lkey; + /* Take slower bottom-half on miss. */ + return mlx4_tx_mb2mr_bh(txq, mb); } #endif /* MLX4_RXTX_H_ */