From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 5C8485688 for ; Wed, 19 Apr 2017 18:25:49 +0200 (CEST) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Apr 2017 09:25:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,222,1488873600"; d="scan'208";a="91770785" Received: from fyigit-mobl1.ger.corp.intel.com (HELO [10.237.220.59]) ([10.237.220.59]) by fmsmga006.fm.intel.com with ESMTP; 19 Apr 2017 09:25:37 -0700 To: Billy McFall , thomas.monjalon@6wind.com, wenzhuo.lu@intel.com, olivier.matz@6wind.com Cc: dev@dpdk.org References: <20170315180226.5999-1-bmcfall@redhat.com> <20170324185555.18398-1-bmcfall@redhat.com> From: Ferruh Yigit Message-ID: <66ddc3cb-67dc-25d5-8b58-4818cc929a69@intel.com> Date: Wed, 19 Apr 2017 17:25:37 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.0.1 MIME-Version: 1.0 In-Reply-To: <20170324185555.18398-1-bmcfall@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH v8 0/3] new API to free consumed buffers in Tx ring 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, 19 Apr 2017 16:25:50 -0000 On 3/24/2017 6:55 PM, Billy McFall wrote: > See request from 11/21/2016: > http://dpdk.org/ml/archives/dev/2016-November/050585.html > > Add a new API to free consumed buffers on TX ring. This addresses two > scenarios: > 1) Flooding a packet and want to reuse existing mbuf to avoid a packet > copy. Increment the reference count of the packet and poll new API until > reference count is decremented. > 2) Application runs out of mbufs, or resets and is preparing for > additional run, call API to free consumed packets so processing can > continue. > > API will return the number of packets freed (0-n) or error code if > feature not supported (-ENOTSUP) or input invalid (-ENODEV). > > API for e1000 igb driver and vHost driver have been implemented. Other > drivers can be implemented over time. Some drivers implement a Tx done > flush routine that should be reused where possible. e1000 igb driver > and vHost driver do not have such functions. Another reminder for PMDs. This is new eth_dev_ops, described above: "tx_done_cleanup" Currently only implemented by igb and vhost. Other PMDs feel free to implement new ops. Thanks, ferruh