From ffd0ec015b9f51d3f39e320a02448fc5d43932be Mon Sep 17 00:00:00 2001 From: "Wei Hu (Xavier)" Date: Thu, 9 Jan 2020 11:15:53 +0800 Subject: [PATCH] net/hns3: add free threshold in Rx This patch optimizes the Rx performance by adding the rx_free_thresh related process in the '.rx_pkt_burst' ops implementation function named hns3_recv_pkts. The related change as follows: 1. Adding the rx_free_thresh related process to reduce the number of writing the HNS3_RING_RX_HEAD_REG register. 2. Adjusting the internal macro named DEFAULT_RX_FREE_THRESH to 32 and adjusting HNS3_MIN_RING_DESC to 64 to make the effect of the thresh more obvious. Signed-off-by: Chengwen Feng Signed-off-by: Wei Hu (Xavier) --- drivers/net/hns3/hns3_rxtx.c | 12 ++++++++++-- drivers/net/hns3/hns3_rxtx.h | 2 +- 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c index a1655e246b..6f74a79171 100644 --- a/drivers/net/hns3/hns3_rxtx.c +++ b/drivers/net/hns3/hns3_rxtx.c @@ -30,7 +30,7 @@ #include "hns3_logs.h" #define HNS3_CFG_DESC_NUM(num) ((num) / 8 - 1) -#define DEFAULT_RX_FREE_THRESH 16 +#define DEFAULT_RX_FREE_THRESH 32 static void hns3_rx_queue_release_mbufs(struct hns3_rx_queue *rxq) @@ -558,6 +558,7 @@ hns3_dev_rx_queue_start(struct hns3_adapter *hns, uint16_t idx) rxq->next_to_use = 0; rxq->next_to_clean = 0; + rxq->nb_rx_hold = 0; hns3_init_rx_queue_hw(rxq); return 0; @@ -572,6 +573,7 @@ hns3_fake_rx_queue_start(struct hns3_adapter *hns, uint16_t idx) rxq = (struct hns3_rx_queue *)hw->fkq_data.rx_queues[idx]; rxq->next_to_use = 0; rxq->next_to_clean = 0; + rxq->nb_rx_hold = 0; hns3_init_rx_queue_hw(rxq); } @@ -1525,7 +1527,13 @@ pkt_err: rxq->next_to_clean = rx_id; rxq->pkt_first_seg = first_seg; rxq->pkt_last_seg = last_seg; - hns3_clean_rx_buffers(rxq, nb_rx_bd); + + nb_rx_bd = nb_rx_bd + rxq->nb_rx_hold; + if (nb_rx_bd > rxq->rx_free_thresh) { + hns3_clean_rx_buffers(rxq, nb_rx_bd); + nb_rx_bd = 0; + } + rxq->nb_rx_hold = nb_rx_bd; return nb_rx; } diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h index 943c6d8bbf..1c2723ffbe 100644 --- a/drivers/net/hns3/hns3_rxtx.h +++ b/drivers/net/hns3/hns3_rxtx.h @@ -5,7 +5,7 @@ #ifndef _HNS3_RXTX_H_ #define _HNS3_RXTX_H_ -#define HNS3_MIN_RING_DESC 32 +#define HNS3_MIN_RING_DESC 64 #define HNS3_MAX_RING_DESC 32768 #define HNS3_DEFAULT_RING_DESC 1024 #define HNS3_ALIGN_RING_DESC 32 -- 2.20.1