From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikhil Agarwal Subject: [PATCH 1/3] ethdev: add max burst size to device info Date: Tue, 12 Dec 2017 15:35:18 +0530 Message-ID: <20171212100520.20502-1-nikhil.agarwal@linaro.org> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , To: Return-path: Received: from NAM01-BN3-obe.outbound.protection.outlook.com (mail-bn3nam01on0070.outbound.protection.outlook.com [104.47.33.70]) by dpdk.org (Postfix) with ESMTP id D3F802C55 for ; Tue, 12 Dec 2017 11:08:57 +0100 (CET) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Currently, if the rte_eth_rx_burst() function returns a value less than *nb_pkts*, the application will assume that no more packets are present. Some of the hw queue based hardware can only support smaller burst for RX and TX and thus break the expectation of the rx_burst API. This patch adds support to provide the maximum burst size that can be supported by a given PMD. The dev_info is being memset to '0' in rte_ethdev library. The value of '0' indicates that any value for burst size can be supported i.e. no change for existing PMDs. The application can now use the lowest available max_burst_size value for rte_eth_rx_burst. Signed-off-by: Nikhil Agarwal --- lib/librte_ether/rte_ethdev.h | 1 + 1 file changed, 1 insertion(+) diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h index 341c2d6..3ab6f02 100644 --- a/lib/librte_ether/rte_ethdev.h +++ b/lib/librte_ether/rte_ethdev.h @@ -1047,6 +1047,7 @@ struct rte_eth_dev_info { /** Configured number of rx/tx queues */ uint16_t nb_rx_queues; /**< Number of RX queues. */ uint16_t nb_tx_queues; /**< Number of TX queues. */ + uint16_t max_burst_size; /**< MAX burst size, 0 for no limit. */ }; /** -- 2.7.4