<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">Hi DPDK users,</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">I met a dpdk tx issue with dpdk v19.11.10.</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">I use INTEL XXV710 25G NIC, two ports.</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">My app </span><span style="background-color:rgb(255,255,255); display:inline!important; font-family:Consolas,Courier,monospace">use </span><span style="margin:0px; font-size:12pt; background-color:rgb(255,255,255); font-family:Consolas,Courier,monospace">pipeline
mode, </span><span style="font-family:Consolas,Courier,monospace">setup 1 rx and 6 tx queue for each ports,
</span><span style="background-color:rgb(255,255,255); display:inline!important; font-family:Consolas,Courier,monospace">rx/tx
</span><span style="background-color:rgb(255,255,255); display:inline!important"><span style="background-color:rgb(255,255,255); display:inline!important; font-family:Consolas,Courier,monospace">desc </span></span><span style="background-color:rgb(255,255,255); display:inline!important; font-family:Consolas,Courier,monospace">4096, s</span><span style="color:rgb(0,0,0); font-family:Consolas,Courier,monospace; font-size:12pt">hare
one pkt pool. </span><span style="color:rgb(0,0,0); font-family:Consolas,Courier,monospace; font-size:12pt">Traffic is 18Gbps/300Wpps, so each port will have 9G rx and 9G tx.</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">Everything works fine 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:</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
"<span style="font-family:"Courier New",monospace"><i>i40e_xmit_fixed_burst_vec_avx2(): avx:tx_free_thresh 512 tx_rs_thresh 32, nb_tx_free 0</i></span>"<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-size: 12pt; color: rgb(0, 0, 0);"><font face="Consolas, Courier, monospace">Since I do not have re-send action, once the issue occurs, thousands of pkts dropped due to tx failed. And then it will go back to normal since desc is released. </font></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family: Consolas, Courier, monospace;"><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family: Consolas, Courier, monospace;">Does any one met the same issue before ? could you please give any suggestions ? Thank you so much!</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">Br,</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Consolas,Courier,monospace">Christian</span></div>
</body>
</html>