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net/hns3: add free threshold in Rx

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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 <fengchengwen@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
This commit is contained in:
Wei Hu (Xavier) 2020-01-09 11:15:53 +08:00 committed by Ferruh Yigit
parent 5cf7a75b2c
commit ffd0ec015b
2 changed files with 11 additions and 3 deletions
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12
drivers/net/hns3/hns3_rxtx.c
View File

@ -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;
}

2
drivers/net/hns3/hns3_rxtx.h
View File

@ -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