From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from proxy.6wind.com (host.76.145.23.62.rev.coltfrance.com [62.23.145.76]) by dpdk.org (Postfix) with ESMTP id 98C241BBE for ; Wed, 8 Mar 2017 10:42:23 +0100 (CET) Received: from glumotte.dev.6wind.com (unknown [10.16.0.195]) by proxy.6wind.com (Postfix) with ESMTP id E111224D1E; Wed, 8 Mar 2017 10:42:17 +0100 (CET) From: Olivier Matz To: dev@dpdk.org Cc: bruce.richardson@intel.com, konstantin.ananyev@intel.com, mb@smartsharesystems.com, andrey.chilikin@intel.com, jblunck@infradead.org, nelio.laranjeiro@6wind.com, arybchenko@solarflare.com Date: Wed, 8 Mar 2017 10:41:56 +0100 Message-Id: <1488966121-22853-5-git-send-email-olivier.matz@6wind.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1488966121-22853-1-git-send-email-olivier.matz@6wind.com> References: <1485271173-13408-1-git-send-email-olivier.matz@6wind.com> <1488966121-22853-1-git-send-email-olivier.matz@6wind.com> Subject: [dpdk-dev] [PATCH 4/9] drivers/net: don't touch mbuf next or nb segs on Rx X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Mar 2017 09:42:23 -0000 Now that the m->next pointer and m->nb_segs is expected to be set (to NULL and 1 respectively) after a mempool_get(), we can avoid to write them in the Rx functions of drivers. Only some drivers are patched, it's not an exhaustive patch. It gives the idea to do the same in other drivers. Signed-off-by: Olivier Matz --- drivers/net/i40e/i40e_rxtx_vec_sse.c | 6 ------ drivers/net/ixgbe/ixgbe_rxtx.c | 8 -------- drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c | 6 ------ drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 6 ------ drivers/net/null/rte_eth_null.c | 2 -- drivers/net/virtio/virtio_rxtx.c | 4 ---- 6 files changed, 32 deletions(-) diff --git a/drivers/net/i40e/i40e_rxtx_vec_sse.c b/drivers/net/i40e/i40e_rxtx_vec_sse.c index b95cc8e..2f861fd 100644 --- a/drivers/net/i40e/i40e_rxtx_vec_sse.c +++ b/drivers/net/i40e/i40e_rxtx_vec_sse.c @@ -424,12 +424,6 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts, /* store the resulting 32-bit value */ *(int *)split_packet = _mm_cvtsi128_si32(eop_bits); split_packet += RTE_I40E_DESCS_PER_LOOP; - - /* zero-out next pointers */ - rx_pkts[pos]->next = NULL; - rx_pkts[pos + 1]->next = NULL; - rx_pkts[pos + 2]->next = NULL; - rx_pkts[pos + 3]->next = NULL; } /* C.3 calc available number of desc */ diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c index b056107..813c494 100644 --- a/drivers/net/ixgbe/ixgbe_rxtx.c +++ b/drivers/net/ixgbe/ixgbe_rxtx.c @@ -1556,8 +1556,6 @@ ixgbe_rx_alloc_bufs(struct ixgbe_rx_queue *rxq, bool reset_mbuf) /* populate the static rte mbuf fields */ mb = rxep[i].mbuf; if (reset_mbuf) { - mb->next = NULL; - mb->nb_segs = 1; mb->port = rxq->port_id; } @@ -2165,12 +2163,6 @@ ixgbe_recv_pkts_lro(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, goto next_desc; } - /* - * This is the last buffer of the received packet - return - * the current cluster to the user. - */ - rxm->next = NULL; - /* Initialize the first mbuf of the returned packet */ ixgbe_fill_cluster_head_buf(first_seg, &rxd, rxq, staterr); diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c index e2715cb..2c04161 100644 --- a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c +++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c @@ -330,12 +330,6 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts, *(int *)split_packet = ~stat & IXGBE_VPMD_DESC_EOP_MASK; split_packet += RTE_IXGBE_DESCS_PER_LOOP; - - /* zero-out next pointers */ - rx_pkts[pos]->next = NULL; - rx_pkts[pos + 1]->next = NULL; - rx_pkts[pos + 2]->next = NULL; - rx_pkts[pos + 3]->next = NULL; } rte_prefetch_non_temporal(rxdp + RTE_IXGBE_DESCS_PER_LOOP); diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c index abbf284..65c5da3 100644 --- a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c +++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c @@ -425,12 +425,6 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts, /* store the resulting 32-bit value */ *(int *)split_packet = _mm_cvtsi128_si32(eop_bits); split_packet += RTE_IXGBE_DESCS_PER_LOOP; - - /* zero-out next pointers */ - rx_pkts[pos]->next = NULL; - rx_pkts[pos + 1]->next = NULL; - rx_pkts[pos + 2]->next = NULL; - rx_pkts[pos + 3]->next = NULL; } /* C.3 calc available number of desc */ diff --git a/drivers/net/null/rte_eth_null.c b/drivers/net/null/rte_eth_null.c index 57203e2..7e14da0 100644 --- a/drivers/net/null/rte_eth_null.c +++ b/drivers/net/null/rte_eth_null.c @@ -112,8 +112,6 @@ eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs) break; bufs[i]->data_len = (uint16_t)packet_size; bufs[i]->pkt_len = packet_size; - bufs[i]->nb_segs = 1; - bufs[i]->next = NULL; bufs[i]->port = h->internals->port_id; } diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index cab6e8f..b3e6d80 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -772,8 +772,6 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) rxm->ol_flags = 0; rxm->vlan_tci = 0; - rxm->nb_segs = 1; - rxm->next = NULL; rxm->pkt_len = (uint32_t)(len[i] - hdr_size); rxm->data_len = (uint16_t)(len[i] - hdr_size); @@ -900,7 +898,6 @@ virtio_recv_mergeable_pkts(void *rx_queue, rxm->data_off = RTE_PKTMBUF_HEADROOM; rxm->nb_segs = seg_num; - rxm->next = NULL; rxm->ol_flags = 0; rxm->vlan_tci = 0; rxm->pkt_len = (uint32_t)(len[0] - hdr_size); @@ -945,7 +942,6 @@ virtio_recv_mergeable_pkts(void *rx_queue, rxm = rcv_pkts[extra_idx]; rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; - rxm->next = NULL; rxm->pkt_len = (uint32_t)(len[extra_idx]); rxm->data_len = (uint16_t)(len[extra_idx]); -- 2.8.1