From 8052bbd9d548b11cc35826553ed79ded65fddd1d Mon Sep 17 00:00:00 2001 From: Matan Azrad Date: Tue, 19 Dec 2017 17:14:29 +0000 Subject: [PATCH] net/failsafe: improve Rx sub-devices iteration Connecting the sub-devices each other by cyclic linked list can help to iterate over them by Rx burst functions because there is no need to check the sub-devices ring wraparound. Create the aforementioned linked-list and change the Rx burst functions iteration accordingly. Signed-off-by: Matan Azrad Acked-by: Gaetan Rivet --- drivers/net/failsafe/failsafe.c | 5 +++ drivers/net/failsafe/failsafe_ops.c | 1 + drivers/net/failsafe/failsafe_private.h | 5 ++- drivers/net/failsafe/failsafe_rxtx.c | 50 ++++++++----------------- 4 files changed, 24 insertions(+), 37 deletions(-) diff --git a/drivers/net/failsafe/failsafe.c b/drivers/net/failsafe/failsafe.c index 8336510f00..b767352610 100644 --- a/drivers/net/failsafe/failsafe.c +++ b/drivers/net/failsafe/failsafe.c @@ -55,6 +55,7 @@ fs_sub_device_alloc(struct rte_eth_dev *dev, { uint8_t nb_subs; int ret; + int i; ret = failsafe_args_count_subdevice(dev, params); if (ret) @@ -72,6 +73,10 @@ fs_sub_device_alloc(struct rte_eth_dev *dev, ERROR("Could not allocate sub_devices"); return -ENOMEM; } + /* Initiate static sub devices linked list. */ + for (i = 1; i < nb_subs; i++) + PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs + i; + PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs; return 0; } diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c index e16a590360..fe957ad7f9 100644 --- a/drivers/net/failsafe/failsafe_ops.c +++ b/drivers/net/failsafe/failsafe_ops.c @@ -294,6 +294,7 @@ fs_rx_queue_setup(struct rte_eth_dev *dev, rxq->info.conf = *rx_conf; rxq->info.nb_desc = nb_rx_desc; rxq->priv = PRIV(dev); + rxq->sdev = PRIV(dev)->subs; dev->data->rx_queues[rx_queue_id] = rxq; FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) { ret = rte_eth_rx_queue_setup(PORT_ID(sdev), diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h index 4196ece5c0..54b5b91693 100644 --- a/drivers/net/failsafe/failsafe_private.h +++ b/drivers/net/failsafe/failsafe_private.h @@ -62,8 +62,8 @@ struct rxq { struct fs_priv *priv; uint16_t qid; - /* id of last sub_device polled */ - uint8_t last_polled; + /* next sub_device to poll */ + struct sub_device *sdev; unsigned int socket_id; struct rte_eth_rxq_info info; rte_atomic64_t refcnt[]; @@ -100,6 +100,7 @@ struct fs_stats { struct sub_device { /* Exhaustive DPDK device description */ + struct sub_device *next; struct rte_devargs devargs; struct rte_bus *bus; struct rte_device *dev; diff --git a/drivers/net/failsafe/failsafe_rxtx.c b/drivers/net/failsafe/failsafe_rxtx.c index 178294c2e3..0ebf06a6f4 100644 --- a/drivers/net/failsafe/failsafe_rxtx.c +++ b/drivers/net/failsafe/failsafe_rxtx.c @@ -94,36 +94,27 @@ failsafe_rx_burst(void *queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { - struct fs_priv *priv; struct sub_device *sdev; struct rxq *rxq; void *sub_rxq; uint16_t nb_rx; - uint8_t nb_polled, nb_subs; - uint8_t i; rxq = queue; - priv = rxq->priv; - nb_subs = priv->subs_tail - priv->subs_head; - nb_polled = 0; - for (i = rxq->last_polled; nb_polled < nb_subs; nb_polled++) { - i++; - if (i == priv->subs_tail) - i = priv->subs_head; - sdev = &priv->subs[i]; - if (fs_rx_unsafe(sdev)) + sdev = rxq->sdev; + do { + if (fs_rx_unsafe(sdev)) { + nb_rx = 0; continue; + } sub_rxq = ETH(sdev)->data->rx_queues[rxq->qid]; FS_ATOMIC_P(rxq->refcnt[sdev->sid]); nb_rx = ETH(sdev)-> rx_pkt_burst(sub_rxq, rx_pkts, nb_pkts); FS_ATOMIC_V(rxq->refcnt[sdev->sid]); - if (nb_rx) { - rxq->last_polled = i; - return nb_rx; - } - } - return 0; + sdev = sdev->next; + } while (nb_rx == 0 && sdev != rxq->sdev); + rxq->sdev = sdev; + return nb_rx; } uint16_t @@ -131,35 +122,24 @@ failsafe_rx_burst_fast(void *queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { - struct fs_priv *priv; struct sub_device *sdev; struct rxq *rxq; void *sub_rxq; uint16_t nb_rx; - uint8_t nb_polled, nb_subs; - uint8_t i; rxq = queue; - priv = rxq->priv; - nb_subs = priv->subs_tail - priv->subs_head; - nb_polled = 0; - for (i = rxq->last_polled; nb_polled < nb_subs; nb_polled++) { - i++; - if (i == priv->subs_tail) - i = priv->subs_head; - sdev = &priv->subs[i]; + sdev = rxq->sdev; + do { RTE_ASSERT(!fs_rx_unsafe(sdev)); sub_rxq = ETH(sdev)->data->rx_queues[rxq->qid]; FS_ATOMIC_P(rxq->refcnt[sdev->sid]); nb_rx = ETH(sdev)-> rx_pkt_burst(sub_rxq, rx_pkts, nb_pkts); FS_ATOMIC_V(rxq->refcnt[sdev->sid]); - if (nb_rx) { - rxq->last_polled = i; - return nb_rx; - } - } - return 0; + sdev = sdev->next; + } while (nb_rx == 0 && sdev != rxq->sdev); + rxq->sdev = sdev; + return nb_rx; } uint16_t -- 2.20.1