net: hns3: change GL update rate

The interrupt coalescing self-adaptive function updates the int_gl every
interrupt. The GL update rate is too faster to get a better new GL value.
This patch changes the GL update rate to every one hundred interrupts.
The GL update rate is defined by HNS3_INT_ADAPT_DOWN_START.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index f700ec18a91f4e92aa7d2e229faf08106b0152f6..e7cf7b4b40d349bffcbfebfe3de58ffec8d293ed 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -214,6 +214,7 @@ static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
        /* Default: disable RL */
        h->kinfo.int_rl_setting = 0;
 
+       tqp_vector->int_adapt_down = HNS3_INT_ADAPT_DOWN_START;
        tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
        tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
 }
@@ -2492,6 +2493,11 @@ static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
        struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
        bool rx_update, tx_update;
 
+       if (tqp_vector->int_adapt_down > 0) {
+               tqp_vector->int_adapt_down--;
+               return;
+       }
+
        if (rx_group->coal.gl_adapt_enable) {
                rx_update = hns3_get_new_int_gl(rx_group);
                if (rx_update)
@@ -2505,6 +2511,8 @@ static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
                        hns3_set_vector_coalesce_tx_gl(tqp_vector,
                                                       tx_group->coal.int_gl);
        }
+
+       tqp_vector->int_adapt_down = HNS3_INT_ADAPT_DOWN_START;
 }
 
 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index c313780ef2a7941599d457898b26224abf9c6308..2fe870b580b19b3085a2c1aa787a88afee9a90f5 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -462,6 +462,8 @@ enum hns3_link_mode_bits {
 #define HNS3_INT_RL_MAX                        0x00EC
 #define HNS3_INT_RL_ENABLE_MASK                0x40
 
+#define HNS3_INT_ADAPT_DOWN_START      100
+
 struct hns3_enet_coalesce {
        u16 int_gl;
        u8 gl_adapt_enable;