netdev - [PATCH net-next] net: ethernet: microchip: lan743x: Increase rx ring size to improve rx performance

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Date:   Thu, 28 Oct 2021 11:21:05 -0400
From:   Yuiko Oshino <yuiko.oshino@...rochip.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     <bryan.whitehead@...rochip.com>, <UNGLinuxDriver@...rochip.com>,
        "Yuiko Oshino" <yuiko.oshino@...rochip.com>
Subject: [PATCH net-next] net: ethernet: microchip: lan743x: Increase rx ring size to improve rx performance

Increase the rx ring size (LAN743X_RX_RING_SIZE) to improve rx performance on some platforms.
Tested on x86 PC with EVB-LAN7430.
The iperf3.7 TCPIP improved from 881 Mbps to 922 Mbps, and UDP improved from 817 Mbps to 936 Mbps.

Signed-off-by: Yuiko Oshino <yuiko.oshino@...rochip.com>
---
 drivers/net/ethernet/microchip/lan743x_main.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 34c22eea0124..aaf7aaeaba0c 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -831,7 +831,7 @@ struct lan743x_rx_buffer_info {
 	unsigned int    buffer_length;
 };
 
-#define LAN743X_RX_RING_SIZE        (65)
+#define LAN743X_RX_RING_SIZE        (128)
 
 #define RX_PROCESS_RESULT_NOTHING_TO_DO     (0)
 #define RX_PROCESS_RESULT_BUFFER_RECEIVED   (1)
-- 
2.25.1