From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id 162285699 for ; Thu, 31 Mar 2016 08:18:56 +0200 (CEST) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP; 30 Mar 2016 23:18:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,420,1455004800"; d="scan'208";a="678407775" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by FMSMGA003.fm.intel.com with ESMTP; 30 Mar 2016 23:18:55 -0700 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id u2V6IrOZ025612; Thu, 31 Mar 2016 14:18:53 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id u2V6IogW012477; Thu, 31 Mar 2016 14:18:52 +0800 Received: (from wenzhuol@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id u2V6IoWu012473; Thu, 31 Mar 2016 14:18:50 +0800 From: Wenzhuo Lu To: dev@dpdk.org Cc: Wenzhuo Lu Date: Thu, 31 Mar 2016 14:18:49 +0800 Message-Id: <1459405129-12442-1-git-send-email-wenzhuo.lu@intel.com> X-Mailer: git-send-email 1.7.4.1 Subject: [dpdk-dev] [PATCH] igb: change default RX wthresh back X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 31 Mar 2016 06:18:57 -0000 A problem is found on i350 VF. TX will happen once per 4 packets. If only 1~3 packets are received, they will not be forwarded. The reason is the default RX write-back threshold is changed to 4. This patch changes the value back to 0, so every packet can be handled immediately. Fixes: 4a41c17dba18 (igb: set default thresholds based on MAC type) Signed-off-by: Wenzhuo Lu --- drivers/net/e1000/igb_ethdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c index bd0ae26..34120ae 100644 --- a/drivers/net/e1000/igb_ethdev.c +++ b/drivers/net/e1000/igb_ethdev.c @@ -64,7 +64,7 @@ #define IGB_DEFAULT_RX_PTHRESH ((hw->mac.type == e1000_i354) ? 12 : 8) #define IGB_DEFAULT_RX_HTHRESH 8 -#define IGB_DEFAULT_RX_WTHRESH ((hw->mac.type == e1000_82576) ? 1 : 4) +#define IGB_DEFAULT_RX_WTHRESH 0 #define IGB_DEFAULT_TX_PTHRESH ((hw->mac.type == e1000_i354) ? 20 : 8) #define IGB_DEFAULT_TX_HTHRESH 1 -- 1.9.3