From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by dpdk.org (Postfix) with ESMTP id 44C762B96; Wed, 26 Apr 2017 13:29:41 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2017 04:29:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="1161165866" Received: from silpixa00381631.ir.intel.com (HELO silpixa00381631.ger.corp.intel.com) ([10.237.222.122]) by fmsmga002.fm.intel.com with ESMTP; 26 Apr 2017 04:29:39 -0700 From: Pablo de Lara To: dev@dpdk.org Cc: Pablo de Lara , stable@dpdk.org Date: Wed, 26 Apr 2017 12:29:52 +0100 Message-Id: <1493206192-69422-1-git-send-email-pablo.de.lara.guarch@intel.com> X-Mailer: git-send-email 2.7.4 Subject: [dpdk-dev] [PATCH] examples/l3fwd-power: fix Rx descriptor size X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Apr 2017 11:29:42 -0000 L3fwd power app monitors the RX queues to see if the polling frequency should be adjusted (the busier the queue, the higher the frequency). The app uses several thresholds in the ring to determine the frequency, being 96 the highest one, when frequency should be highest. The problem is that the difference between this value and the ring size is not big enough (128 - 96 = 32 descriptors), which means that if the descriptors are not replenished quick enough, queue might not be busy, but the app would think that it is, because 96th descriptor is set. Therefore, by increasing this gap (increasing the RX ring size), we make sure that this false measurement will not happen. Fixes: b451aa39db31 ("examples/l3fwd-power: use DD bit rather than RX queue count") Cc: stable@dpdk.org Signed-off-by: Pablo de Lara --- examples/l3fwd-power/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c index ec40a17..7a8e1cd 100644 --- a/examples/l3fwd-power/main.c +++ b/examples/l3fwd-power/main.c @@ -147,7 +147,7 @@ /* * Configurable number of RX/TX ring descriptors */ -#define RTE_TEST_RX_DESC_DEFAULT 128 +#define RTE_TEST_RX_DESC_DEFAULT 512 #define RTE_TEST_TX_DESC_DEFAULT 512 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT; static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT; -- 2.7.4