netdev - [net-next, PATCH 2/2 v2] net: socionext: Increase descriptors to 256

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Date:   Fri, 10 Aug 2018 09:12:39 +0300
From:   Ilias Apalodimas <ilias.apalodimas@...aro.org>
To:     netdev@...r.kernel.org, jaswinder.singh@...aro.org
Cc:     ard.biesheuvel@...aro.org, masami.hiramatsu@...aro.org,
        arnd@...db.de, Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: [net-next, PATCH 2/2 v2] net: socionext: Increase descriptors to 256

Increasing descriptors to 256 from 128 and adjusting the NAPI weight
to 64 increases performace on Rx by ~20% on 64byte packets

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>
---
 drivers/net/ethernet/socionext/netsec.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
index 334b618..7aa5ebb 100644
--- a/drivers/net/ethernet/socionext/netsec.c
+++ b/drivers/net/ethernet/socionext/netsec.c
@@ -232,8 +232,7 @@
 #define NETSEC_EEPROM_PKT_ME_ADDRESS		0x20
 #define NETSEC_EEPROM_PKT_ME_SIZE		0x24
 
-#define DESC_NUM	128
-#define NAPI_BUDGET	(DESC_NUM / 2)
+#define DESC_NUM	256
 
 #define DESC_SZ	sizeof(struct netsec_de)
 
@@ -1659,7 +1658,7 @@ static int netsec_probe(struct platform_device *pdev)
 	dev_info(&pdev->dev, "hardware revision %d.%d\n",
 		 hw_ver >> 16, hw_ver & 0xffff);
 
-	netif_napi_add(ndev, &priv->napi, netsec_napi_poll, NAPI_BUDGET);
+	netif_napi_add(ndev, &priv->napi, netsec_napi_poll, NAPI_POLL_WEIGHT);
 
 	ndev->netdev_ops = &netsec_netdev_ops;
 	ndev->ethtool_ops = &netsec_ethtool_ops;
-- 
2.7.4