linux-kernel - [PATCH net 1/3] net: ethernet: ave: Increase descriptors to improve performance

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Message-Id: <1543478918-13883-2-git-send-email-hayashi.kunihiko@socionext.com>
Date:   Thu, 29 Nov 2018 17:08:36 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH net 1/3] net: ethernet: ave: Increase descriptors to improve performance

To improve performance, this increases Rx descriptor to 256, Tx descriptor
to 64, and adjusts NAPI weight to NAPI_POLL_WEIGHT.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
 drivers/net/ethernet/socionext/sni_ave.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index 8c1e120..598b963 100644
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -185,8 +185,8 @@
 				 NETIF_MSG_TX_ERR)
 
 /* Parameter for descriptor */
-#define AVE_NR_TXDESC		32	/* Tx descriptor */
-#define AVE_NR_RXDESC		64	/* Rx descriptor */
+#define AVE_NR_TXDESC		64	/* Tx descriptor */
+#define AVE_NR_RXDESC		256	/* Rx descriptor */
 
 #define AVE_DESC_OFS_CMDSTS	0
 #define AVE_DESC_OFS_ADDRL	4
@@ -1694,9 +1694,10 @@ static int ave_probe(struct platform_device *pdev)
 		 pdev->name, pdev->id);
 
 	/* Register as a NAPI supported driver */
-	netif_napi_add(ndev, &priv->napi_rx, ave_napi_poll_rx, priv->rx.ndesc);
+	netif_napi_add(ndev, &priv->napi_rx, ave_napi_poll_rx,
+		       NAPI_POLL_WEIGHT);
 	netif_tx_napi_add(ndev, &priv->napi_tx, ave_napi_poll_tx,
-			  priv->tx.ndesc);
+			  NAPI_POLL_WEIGHT);
 
 	platform_set_drvdata(pdev, ndev);
 
-- 
2.7.4