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Thu, 31 Mar 2022 07:11:15 +0000 Received: from ME3P282MB2762.AUSP282.PROD.OUTLOOK.COM ([fe80::f4fe:67a6:6994:b625]) by ME3P282MB2762.AUSP282.PROD.OUTLOOK.COM ([fe80::f4fe:67a6:6994:b625%5]) with mapi id 15.20.5123.019; Thu, 31 Mar 2022 07:11:15 +0000 From: Hong Christian To: "users@dpdk.org" CC: "michael.jin@intel.com" , "Wu, Jianyue (NSB - CN/Hangzhou)" , "julien.meunier.perso@gmail.com" Subject: rte_eth_tx_burst return zero occasionally Thread-Topic: rte_eth_tx_burst return zero occasionally Thread-Index: AQHYPmYhgnOjyn0L4U+esn8fsrwmbw== Date: Thu, 31 Mar 2022 07:11:14 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: suggested_attachment_session_id: 5f0af03b-0c58-c51d-451b-30ea2034f416 x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [AggWnHZsvdb5k7SDTG4a9zQxwZejd/EU] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2ffc0e6e-5a7b-492d-f101-08da12e5a4ec x-ms-traffictypediagnostic: SYBP282MB0123:EE_ x-microsoft-antispam: BCL:0; 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Hi DPDK users,


I met a dpdk tx issu= e with dpdk v19.11.10.

I use INTEL XXV710 2= 5G NIC, two ports.

My app use pipeline mode, s= etup 1 rx and 6 tx queue for each ports,  rx/tx desc 4096, shar= e one pkt pool. Traffic is 18Gbps/300Wpps, so each= port will have 9G rx and 9G tx.

Everything works fin= e at the beginning 1~2 hours. Then rte_eth_tx_burst starts to return 0 in a= while. I add prints, and it shows the tx desc is not freed in that time:

"i40e= _xmit_fixed_burst_vec_avx2(): avx:tx_free_thresh 512 tx_rs_thresh 32, nb_tx= _free 0"

Since I do not have re-send action, once the issue oc= curs, thousands of pkts dropped due to tx failed. And then it will go back = to normal since desc is released. 

Does any one met= the same issue before ? could you please give any suggestions ? Thank you = so much!

Br,
Christian --_000_SY4P282MB2758CA46D2C34E56F17638DAAC189SY4P282MB2758AUSP_--