diff mbox series

[05/11] net/hns3: add free thresh in Rx operation

Message ID 20200109031559.63194-6-huwei013@chinasoftinc.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers
Series misc updates and fixes for hns3 PMD driver |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Wei Hu (Xavier) Jan. 9, 2020, 3:15 a.m. UTC 
  From: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>

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>
---
 drivers/net/hns3/hns3_rxtx.c | 12 ++++++++++--
 drivers/net/hns3/hns3_rxtx.h |  2 +-
 2 files changed, 11 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index a1655e246..6f74a7917 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 @@  hns3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 	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 943c6d8bb..1c2723ffb 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