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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: PH0PR12MB8800.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 262db304-e9c8-4412-b67c-08dc8bba75e7 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Jun 2024 15:06:53.7784 (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: lL2KbvH/uw7Vh+n6PuX6Av5Btg/uU67+9cvPxcr14x9mYaFwXQ/Tjy/UVvQzsyGE/QbuP9ohLRz7a3AKnxI5+A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB8615 X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions <users.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/users>, <mailto:users-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/users/> List-Post: <mailto:users@dpdk.org> List-Help: <mailto:users-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/users>, <mailto:users-request@dpdk.org?subject=subscribe> Errors-To: users-bounces@dpdk.org Hi, > -----Original Message----- > From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com> > Sent: Thursday, June 13, 2024 11:02 > To: users@dpdk.org > Subject: [net/mlx5] Performance drop with HWS compared to SWS >=20 > Hello, >=20 > We're observing an abrupt performance drop from 148 to 107 Mpps @ 64B > packets apparently caused by any rule that jumps out of ingress group 0 w= hen > using HWS (async API) instead of SWS (sync API). > Is it some known issue or temporary limitation? This is not an expected behavior. It's expected that performance will be th= e same.=20 Thank you for reporting that and for neohost dumps. I have a few questions: - Could you share mlnx_perf stats for SWS case as well? - If group 1 had a flow rule with empty match and RSS action, is the perfor= mance difference the same? (This would help to understand if the problem is with miss behavior or wi= th jump between group 0 and group 1). - Would you be able to do the test with miss in empty group 1, with Etherne= t Flow Control disabled? > NIC: ConnectX-6 Dx EN adapter card; 100GbE; Dual-port QSFP56; PCIe 4.0/3.= 0 > x16; > FW: 22.40.1000 > OFED: MLNX_OFED_LINUX-24.01-0.3.3.1 > DPDK: v24.03-23-g76cef1af8b > TG is custom, traffic is Ethernet / VLAN / IPv4 / TCP SYN @ 148 Mpps. >=20 > Examples below do only the jump and miss all packets in group 1, but the = same is > observed when dropping all the packets in group 1. >=20 > Software steering: >=20 > /root/build/app/dpdk-testpmd -a 21:00.0,dv_flow_en=3D1 -- -i --rxq=3D1 --= txq=3D1 >=20 > flow create 0 ingress group 0 pattern end actions jump group 1 / end >=20 > Neohost (from OFED 5.7): >=20 > ||=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =3D > ||=3D=3D=3D=3D=3D > ||| Packet Rate = || > ||---------------------------------------------------------------------- > ||----- > ||| RX Packet Rate || 148,813,590 [Packets/Seconds= ] || > ||| TX Packet Rate || 0 [Packets/Seconds= ] || > ||=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =3D > ||=3D=3D=3D=3D=3D > ||| eSwitch = || > ||---------------------------------------------------------------------- > ||----- > ||| RX Hops Per Packet || 3.075 [Hops/Packet] = || > ||| RX Optimal Hops Per Packet Per Pipe || 1.5375 [Hops/Packet] = || > ||| RX Optimal Packet Rate Bottleneck || 279.6695 [MPPS] = || > ||| RX Packet Rate Bottleneck || 262.2723 [MPPS] = || >=20 > (Full Neohost output is attached.) >=20 > Hardware steering: >=20 > /root/build/app/dpdk-testpmd -a 21:00.0,dv_flow_en=3D2 -- -i --rxq=3D1 --= txq=3D1 >=20 > port stop 0 > flow configure 0 queues_number 1 queues_size 128 counters_number 16 port > start 0 flow pattern_template 0 create pattern_template_id 1 ingress temp= late > end flow actions_template 0 create ingress actions_template_id 1 template= jump > group 1 / end mask jump group 0xFFFFFFFF / end flow template_table 0 crea= te > ingress group 0 table_id 1 pattern_template 1 actions_template 1 rules_nu= mber > 1 flow queue 0 create 0 template_table 1 pattern_template 0 actions_templ= ate 0 > postpone false pattern end actions jump group 1 / end flow pull 0 queue 0 >=20 > Neohost: >=20 > ||=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =3D > ||=3D=3D=3D=3D=3D > ||| Packet Rate = || > ||---------------------------------------------------------------------- > ||----- > ||| RX Packet Rate || 107,498,115 [Packets/Seconds= ] || > ||| TX Packet Rate || 0 [Packets/Seconds= ] || > ||=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =3D > ||=3D=3D=3D=3D=3D > ||| eSwitch = || > ||---------------------------------------------------------------------- > ||----- > ||| RX Hops Per Packet || 4.5503 [Hops/Packet] = || > ||| RX Optimal Hops Per Packet Per Pipe || 2.2751 [Hops/Packet] = || > ||| RX Optimal Packet Rate Bottleneck || 188.9994 [MPPS] = || > ||| RX Packet Rate Bottleneck || 182.5796 [MPPS] = || >=20 > AFAIU, performance is not constrained by the complexity of the rules. >=20 > mlnx_perf -i enp33s0f0np0 -t 1: >=20 > rx_steer_missed_packets: 108,743,272 > rx_vport_unicast_packets: 108,743,424 > rx_vport_unicast_bytes: 6,959,579,136 Bps =3D 55,676.63 Mbps > tx_packets_phy: 7,537 > rx_packets_phy: 150,538,251 > tx_bytes_phy: 482,368 Bps =3D 3.85 Mbps > rx_bytes_phy: 9,634,448,128 Bps =3D 77,075.58 Mbps > tx_mac_control_phy: 7,536 > tx_pause_ctrl_phy: 7,536 > rx_discards_phy: 41,794,740 > rx_64_bytes_phy: 150,538,352 Bps =3D 1,204.30 Mbps > rx_buffer_passed_thres_phy: 202 > rx_prio0_bytes: 9,634,520,256 Bps =3D 77,076.16 Mbps > rx_prio0_packets: 108,744,322 > rx_prio0_discards: 41,795,050 > tx_global_pause: 7,537 > tx_global_pause_duration: 1,011,592 >=20 > "rx_discards_phy" is described as follows [1]: >=20 > The number of received packets dropped due to lack of buffers on a > physical port. If this counter is increasing, it implies that the ada= pter > is congested and cannot absorb the traffic coming from the network. >=20 > However, the adapter certainly *is* able to process 148 Mpps, since it do= es so > with SWS and it can deliver this much to SW (with MPRQ). >=20 > [1]: > https://www.kernel.org/doc/Documentation/networking/device_drivers/ethern= e > t/mellanox/mlx5/counters.rst Best regards, Dariusz Sosnowski