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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8PR12MB5494.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 833a0fda-5579-4920-7cf2-08d945fab56b X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Jul 2021 12:35:33.6451 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: AfN5UyGAfk9frZj2XK8qZ+u75CyQFvN9N2ww6HMTlCGlTYyvdYZyoZhgPECLdOBNdWwRcg4VPdtlsr2ni1xO2Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8PR12MB5462 Subject: Re: [dpdk-users] mlx5 VF packet lost between rx_port_unicast_packets and rx_good_packets X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" Hello Yan, Can you please mention which DPDK version you use and whether you see this = issue also with latest upstream version? Regards, Asaf Penso >-----Original Message----- >From: users On Behalf Of Yan, Xiaoping (NSB - >CN/Hangzhou) >Sent: Monday, July 5, 2021 1:08 PM >To: users@dpdk.org >Subject: [dpdk-users] mlx5 VF packet lost between rx_port_unicast_packets >and rx_good_packets > >Hi, > >When doing traffic loopback test on a mlx5 VF, we found there are some >packet loss (not all packet received back ). > >>From xstats counters, I found all packets have been received in >rx_port_unicast_packets, but rx_good_packets has lower counter, and >rx_port_unicast_packets - rx_good_packets =3D lost packets i.e. packet los= t >between rx_port_unicast_packets and rx_good_packets. >But I can not find any other counter indicating where exactly those packet= s >are lost. > >Any idea? > >Attached is the counter logs. (bf is before the test, af is after the test= , fp-cli >dpdk-port-stats is the command used to get xstats, and ethtool -S _f1 (the= vf >used) also printed) Test equipment reports that it sends: 2911176 packets, >receives: 2909474, dropped: 1702 And the xstats (after - before) shows >rx_port_unicast_packets 2911177, rx_good_packets 2909475, so drop >(2911177 - rx_good_packets) is 1702 > >BTW, I also noticed this discussion "packet loss between phy and good >counter" >http://mails.dpdk.org/archives/users/2018-July/003271.html >but my case seems to be different as packet also received in >rx_port_unicast_packets, and I checked counter from pf (ethtool -S ens1f0= in >attached log), rx_discards_phy is not increasing. > >Thank you. > >Best regards >Yan Xiaoping