From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79DC7C47085 for ; Mon, 24 Jan 2022 23:05:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1842246AbiAXXBY (ORCPT ); Mon, 24 Jan 2022 18:01:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1579821AbiAXWnj (ORCPT ); Mon, 24 Jan 2022 17:43:39 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E84ADC05A1B4; Mon, 24 Jan 2022 11:39:27 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 5D592B810BD; Mon, 24 Jan 2022 19:39:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8AA0AC340E5; Mon, 24 Jan 2022 19:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643053165; bh=GQv7LOP06zbfKaH6OrGhewLZ8+JM8W6ZxwkO/Q4Zfm4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XDwG35NSccQJbJ/soHUtOJLEu3Hl+fgWorfiMMephf2a1MUcwQ0aXBVhMVp0ZGAtz 0pjcOOoNLm+Fw+BZaM68D48xx/B2MqYUqxBpNdGsUwjZk+aYewzd57UarKvbc2RUp8 OBWDsIo13xG8dC0sh4Y4Vhzz5CPfcYeSKjaf1PZI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Robert Hancock , "David S. Miller" Subject: [PATCH 5.4 297/320] net: axienet: increase default TX ring size to 128 Date: Mon, 24 Jan 2022 19:44:41 +0100 Message-Id: <20220124184004.051571050@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183953.750177707@linuxfoundation.org> References: <20220124183953.750177707@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Robert Hancock commit 2d19c3fd80178160dd505ccd7fed1643831227a5 upstream. With previous changes to make the driver handle the TX ring size more correctly, the default TX ring size of 64 appears to significantly bottleneck TX performance to around 600 Mbps on a 1 Gbps link on ZynqMP. Increasing this to 128 seems to bring performance up to near line rate and shouldn't cause excess bufferbloat (this driver doesn't yet support modern byte-based queue management). Fixes: 8a3b7a252dca9 ("drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver") Signed-off-by: Robert Hancock Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -41,7 +41,7 @@ #include "xilinx_axienet.h" /* Descriptors defines for Tx and Rx DMA */ -#define TX_BD_NUM_DEFAULT 64 +#define TX_BD_NUM_DEFAULT 128 #define RX_BD_NUM_DEFAULT 1024 #define TX_BD_NUM_MIN (MAX_SKB_FRAGS + 1) #define TX_BD_NUM_MAX 4096