From: Nélio Laranjeiro Date: Thu, 24 Nov 2016 16:03:32 +0000 (+0100) Subject: net/mlx5: use vector types to speed up processing X-Git-Tag: spdx-start~4873 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=9a7fa9f76d9e;p=dpdk.git net/mlx5: use vector types to speed up processing Let compiler automatically use the vector capabilities of the target machine to optimize instructions. Signed-off-by: Nelio Laranjeiro Acked-by: Adrien Mazarguil --- diff --git a/drivers/net/mlx5/mlx5_prm.h b/drivers/net/mlx5/mlx5_prm.h index 3cc5af9aad..d9bb332343 100644 --- a/drivers/net/mlx5/mlx5_prm.h +++ b/drivers/net/mlx5/mlx5_prm.h @@ -46,6 +46,7 @@ #pragma GCC diagnostic error "-Wpedantic" #endif +#include #include "mlx5_autoconf.h" /* Get CQE owner bit. */ @@ -145,6 +146,12 @@ struct mlx5_wqe { struct mlx5_wqe_eth_seg_small eseg; }; +/* Vectorize WQE header. */ +struct mlx5_wqe_v { + rte_v128u32_t ctrl; + rte_v128u32_t eseg; +}; + /* WQE. */ struct mlx5_wqe64 { struct mlx5_wqe hdr; diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c index e6c0595f4c..017742859d 100644 --- a/drivers/net/mlx5/mlx5_rxtx.c +++ b/drivers/net/mlx5/mlx5_rxtx.c @@ -369,7 +369,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) unsigned int j = 0; unsigned int max; unsigned int comp; - volatile struct mlx5_wqe *wqe = NULL; + volatile struct mlx5_wqe_v *wqe = NULL; unsigned int segs_n = 0; struct rte_mbuf *buf = NULL; uint8_t *raw; @@ -386,12 +386,14 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) if (max > elts_n) max -= elts_n; do { - volatile struct mlx5_wqe_data_seg *dseg = NULL; + volatile rte_v128u32_t *dseg = NULL; uint32_t length; unsigned int ds = 0; uintptr_t addr; + uint64_t naddr; uint16_t pkt_inline_sz = MLX5_WQE_DWORD_SIZE; uint8_t ehdr[2]; + uint8_t cs_flags = 0; #ifdef MLX5_PMD_SOFT_COUNTERS uint32_t total_length = 0; #endif @@ -410,7 +412,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) --segs_n; if (!segs_n) --pkts_n; - wqe = (volatile struct mlx5_wqe *) + wqe = (volatile struct mlx5_wqe_v *) tx_mlx5_wqe(txq, txq->wqe_ci); rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci + 1)); if (pkts_n > 1) @@ -436,11 +438,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) /* Should we enable HW CKSUM offload */ if (buf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) { - wqe->eseg.cs_flags = - MLX5_ETH_WQE_L3_CSUM | - MLX5_ETH_WQE_L4_CSUM; - } else { - wqe->eseg.cs_flags = 0; + cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM; } raw = ((uint8_t *)(uintptr_t)wqe) + 2 * MLX5_WQE_DWORD_SIZE; /* @@ -496,12 +494,11 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) */ ds = 2 + MLX5_WQE_DS(pkt_inline_sz - 2); if (length > 0) { - dseg = (volatile struct mlx5_wqe_data_seg *) + dseg = (volatile rte_v128u32_t *) ((uintptr_t)wqe + (ds * MLX5_WQE_DWORD_SIZE)); if ((uintptr_t)dseg >= end) - dseg = (volatile struct - mlx5_wqe_data_seg *) + dseg = (volatile rte_v128u32_t *) txq->wqes; goto use_dseg; } else if (!segs_n) { @@ -514,16 +511,17 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) * No inline has been done in the packet, only the * Ethernet Header as been stored. */ - wqe->eseg.inline_hdr_sz = htons(MLX5_WQE_DWORD_SIZE); - dseg = (volatile struct mlx5_wqe_data_seg *) + dseg = (volatile rte_v128u32_t *) ((uintptr_t)wqe + (3 * MLX5_WQE_DWORD_SIZE)); ds = 3; use_dseg: /* Add the remaining packet as a simple ds. */ - *dseg = (volatile struct mlx5_wqe_data_seg) { - .addr = htonll(addr), - .byte_count = htonl(length), - .lkey = txq_mp2mr(txq, txq_mb2mp(buf)), + naddr = htonll(addr); + *dseg = (rte_v128u32_t){ + htonl(length), + txq_mp2mr(txq, txq_mb2mp(buf)), + naddr, + naddr >> 32, }; ++ds; if (!segs_n) @@ -543,7 +541,7 @@ next_seg: unsigned int n = (txq->wqe_ci + ((ds + 3) / 4)) & ((1 << txq->wqe_n) - 1); - dseg = (volatile struct mlx5_wqe_data_seg *) + dseg = (volatile rte_v128u32_t *) tx_mlx5_wqe(txq, n); rte_prefetch0(tx_mlx5_wqe(txq, n + 1)); } else { @@ -557,10 +555,12 @@ next_seg: total_length += length; #endif /* Store segment information. */ - *dseg = (volatile struct mlx5_wqe_data_seg) { - .addr = htonll(rte_pktmbuf_mtod(buf, uintptr_t)), - .byte_count = htonl(length), - .lkey = txq_mp2mr(txq, txq_mb2mp(buf)), + naddr = htonll(rte_pktmbuf_mtod(buf, uintptr_t)); + *dseg = (rte_v128u32_t){ + htonl(length), + txq_mp2mr(txq, txq_mb2mp(buf)), + naddr, + naddr >> 32, }; (*txq->elts)[elts_head] = buf; elts_head = (elts_head + 1) & (elts_n - 1); @@ -573,17 +573,19 @@ next_seg: next_pkt: ++i; /* Initialize known and common part of the WQE structure. */ - wqe->ctrl[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND); - wqe->ctrl[1] = htonl(txq->qp_num_8s | ds); - wqe->ctrl[2] = 0; - wqe->ctrl[3] = 0; - wqe->eseg.rsvd0 = 0; - wqe->eseg.rsvd1 = 0; - wqe->eseg.mss = 0; - wqe->eseg.rsvd2 = 0; - wqe->eseg.inline_hdr_sz = htons(pkt_inline_sz); - wqe->eseg.inline_hdr[0] = ehdr[0]; - wqe->eseg.inline_hdr[1] = ehdr[1]; + wqe->ctrl = (rte_v128u32_t){ + htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND), + htonl(txq->qp_num_8s | ds), + 0, + 0, + }; + wqe->eseg = (rte_v128u32_t){ + 0, + cs_flags, + 0, + (ehdr[1] << 24) | (ehdr[0] << 16) | + htons(pkt_inline_sz), + }; txq->wqe_ci += (ds + 3) / 4; #ifdef MLX5_PMD_SOFT_COUNTERS /* Increment sent bytes counter. */ @@ -596,10 +598,13 @@ next_pkt: /* Check whether completion threshold has been reached. */ comp = txq->elts_comp + i + j; if (comp >= MLX5_TX_COMP_THRESH) { + volatile struct mlx5_wqe_ctrl *w = + (volatile struct mlx5_wqe_ctrl *)wqe; + /* Request completion on last WQE. */ - wqe->ctrl[2] = htonl(8); + w->ctrl2 = htonl(8); /* Save elts_head in unused "immediate" field of WQE. */ - wqe->ctrl[3] = elts_head; + w->ctrl3 = elts_head; txq->elts_comp = 0; } else { txq->elts_comp = comp;