From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.evs.tv (mx1.evs.tv [195.190.86.126]) by dpdk.org (Postfix) with ESMTP id AA62447CD for ; Tue, 15 Nov 2016 15:30:55 +0100 (CET) From: "VERDOUX, Sylvain" To: "users@dpdk.org" Thread-Topic: Howto control sending IFG Thread-Index: AdI/S6r32kPBlCXhQtuv9T/ZOwa4NA== Date: Tue, 15 Nov 2016 14:30:55 +0000 Message-ID: <294AEAFC4B0A3E498038549EC65E9D1B018AB09F91@BELGSMBX01.EVS.TV> Accept-Language: fr-FR, fr-BE, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-tm-as-product-ver: SMEX-11.0.0.4255-8.000.1202-22700.006 x-tm-as-result: No--42.961400-0.000000-31 x-tm-as-user-approved-sender: Yes x-tm-as-user-blocked-sender: No MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-users] Howto control sending IFG X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2016 14:30:56 -0000 Hi, Using i40e pmd i'm currently trying to control precisely packets emission r= ate. When dealing with an IFG (inter frame gap) of 1ms it works fine, but d= ealing with IFG under 100us I'm seeing bursts on the receiver. I was wonder= ing if there was a better way to be close to the wanted IFG instead of wait= ing and using rte_eth_tx_burst with 1 packet at a time. I did not see anyth= ing relevant in mbuf structure, and I was wondering if tx queue threshold c= ould help, but I'm not sure to understand well the impact of those threshol= ds. Any advice is welcome :) Best Regards, Sylvain