From c9cc554ba423641d3515671269c5648dab3bb9ad Mon Sep 17 00:00:00 2001 From: Alexander Kozyrev Date: Tue, 2 Jun 2020 03:50:41 +0000 Subject: [PATCH] net/mlx5: fix vectorized Rx burst termination Maximum burst size of Vectorized Rx burst routine is set to MLX5_VPMD_RX_MAX_BURST(64). This limits the performance of any application that would like to gather more than 64 packets from the single Rx burst for batch processing (i.e. VPP). The situation gets worse with a mix of zipped and unzipped CQEs. They are processed separately and the Rx burst function returns small number of packets every call. Repeat the cycle of gathering packets from the vectorized Rx routine until a requested number of packets are collected or there are no more CQEs left to process. Fixes: 6cb559d67b83 ("net/mlx5: add vectorized Rx/Tx burst for x86") Cc: stable@dpdk.org Signed-off-by: Alexander Kozyrev Acked-by: Viacheslav Ovsiienko Acked-by: Matan Azrad --- drivers/net/mlx5/mlx5_rxtx_vec.c | 17 ++++++++++++----- drivers/net/mlx5/mlx5_rxtx_vec_altivec.h | 13 ++++++++++--- drivers/net/mlx5/mlx5_rxtx_vec_neon.h | 13 ++++++++++--- drivers/net/mlx5/mlx5_rxtx_vec_sse.h | 13 ++++++++++--- 4 files changed, 42 insertions(+), 14 deletions(-) diff --git a/drivers/net/mlx5/mlx5_rxtx_vec.c b/drivers/net/mlx5/mlx5_rxtx_vec.c index 1518bdd5b4..b38bd203ce 100644 --- a/drivers/net/mlx5/mlx5_rxtx_vec.c +++ b/drivers/net/mlx5/mlx5_rxtx_vec.c @@ -103,13 +103,20 @@ uint16_t mlx5_rx_burst_vec(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n) { struct mlx5_rxq_data *rxq = dpdk_rxq; - uint16_t nb_rx; + uint16_t nb_rx = 0; + uint16_t tn = 0; uint64_t err = 0; + bool no_cq = false; - nb_rx = rxq_burst_v(rxq, pkts, pkts_n, &err); - if (unlikely(err | rxq->err_state)) - nb_rx = rxq_handle_pending_error(rxq, pkts, nb_rx); - return nb_rx; + do { + nb_rx = rxq_burst_v(rxq, pkts + tn, pkts_n - tn, &err, &no_cq); + if (unlikely(err | rxq->err_state)) + nb_rx = rxq_handle_pending_error(rxq, pkts + tn, nb_rx); + tn += nb_rx; + if (unlikely(no_cq)) + break; + } while (tn != pkts_n); + return tn; } /** diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h b/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h index 26715ef450..b55138ac77 100644 --- a/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h +++ b/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h @@ -564,13 +564,15 @@ rxq_cq_to_ptype_oflags_v(struct mlx5_rxq_data *rxq, * @param[out] err * Pointer to a flag. Set non-zero value if pkts array has at least one error * packet to handle. + * @param[out] no_cq + * Pointer to a boolean. Set true if no new CQE seen. * * @return * Number of packets received including errors (<= pkts_n). */ static inline uint16_t rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, - uint64_t *err) + uint64_t *err, bool *no_cq) { const uint16_t q_n = 1 << rxq->cqe_n; const uint16_t q_mask = q_n - 1; @@ -663,8 +665,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, /* Not to cross queue end. */ pkts_n = RTE_MIN(pkts_n, q_n - elts_idx); pkts_n = RTE_MIN(pkts_n, q_n - cq_idx); - if (!pkts_n) + if (!pkts_n) { + *no_cq = !rcvd_pkt; return rcvd_pkt; + } /* At this point, there shouldn't be any remaining packets. */ MLX5_ASSERT(rxq->decompressed == 0); @@ -1079,8 +1083,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, break; } /* If no new CQE seen, return without updating cq_db. */ - if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) + if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) { + *no_cq = true; return rcvd_pkt; + } /* Update the consumer indexes for non-compressed CQEs. */ MLX5_ASSERT(nocmp_n <= pkts_n); rxq->cq_ci += nocmp_n; @@ -1108,6 +1114,7 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, } rte_compiler_barrier(); *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci); + *no_cq = !rcvd_pkt; return rcvd_pkt; } diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h index ecafbf8004..3007c03593 100644 --- a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h +++ b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h @@ -378,13 +378,15 @@ rxq_cq_to_ptype_oflags_v(struct mlx5_rxq_data *rxq, * @param[out] err * Pointer to a flag. Set non-zero value if pkts array has at least one error * packet to handle. + * @param[out] no_cq + * Pointer to a boolean. Set true if no new CQE seen. * * @return * Number of packets received including errors (<= pkts_n). */ static inline uint16_t rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, - uint64_t *err) + uint64_t *err, bool *no_cq) { const uint16_t q_n = 1 << rxq->cqe_n; const uint16_t q_mask = q_n - 1; @@ -485,8 +487,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, /* Not to cross queue end. */ pkts_n = RTE_MIN(pkts_n, q_n - elts_idx); pkts_n = RTE_MIN(pkts_n, q_n - cq_idx); - if (!pkts_n) + if (!pkts_n) { + *no_cq = !rcvd_pkt; return rcvd_pkt; + } /* At this point, there shouldn't be any remained packets. */ MLX5_ASSERT(rxq->decompressed == 0); /* @@ -745,8 +749,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, break; } /* If no new CQE seen, return without updating cq_db. */ - if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) + if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) { + *no_cq = true; return rcvd_pkt; + } /* Update the consumer indexes for non-compressed CQEs. */ MLX5_ASSERT(nocmp_n <= pkts_n); rxq->cq_ci += nocmp_n; @@ -774,6 +780,7 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, } rte_cio_wmb(); *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci); + *no_cq = !rcvd_pkt; return rcvd_pkt; } diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h index 6847ae7827..da5960ad85 100644 --- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h +++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h @@ -385,13 +385,15 @@ rxq_cq_to_ptype_oflags_v(struct mlx5_rxq_data *rxq, __m128i cqes[4], * @param[out] err * Pointer to a flag. Set non-zero value if pkts array has at least one error * packet to handle. + * @param[out] no_cq + * Pointer to a boolean. Set true if no new CQE seen. * * @return * Number of packets received including errors (<= pkts_n). */ static inline uint16_t rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, - uint64_t *err) + uint64_t *err, bool *no_cq) { const uint16_t q_n = 1 << rxq->cqe_n; const uint16_t q_mask = q_n - 1; @@ -473,8 +475,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, /* Not to cross queue end. */ pkts_n = RTE_MIN(pkts_n, q_n - elts_idx); pkts_n = RTE_MIN(pkts_n, q_n - cq_idx); - if (!pkts_n) + if (!pkts_n) { + *no_cq = !rcvd_pkt; return rcvd_pkt; + } /* At this point, there shouldn't be any remained packets. */ MLX5_ASSERT(rxq->decompressed == 0); /* @@ -696,8 +700,10 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, break; } /* If no new CQE seen, return without updating cq_db. */ - if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) + if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) { + *no_cq = true; return rcvd_pkt; + } /* Update the consumer indexes for non-compressed CQEs. */ MLX5_ASSERT(nocmp_n <= pkts_n); rxq->cq_ci += nocmp_n; @@ -725,6 +731,7 @@ rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n, } rte_compiler_barrier(); *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci); + *no_cq = !rcvd_pkt; return rcvd_pkt; }