<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1854151422;
mso-list-type:hybrid;
mso-list-template-ids:2044867960 201916417 201916419 201916421 201916417 201916419 201916421 201916417 201916419 201916421;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-AU" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have been recently trying to get hardware transmit timestamping working and am having some issues. I have seen that ‘rte_eth_timesync_enable’ is returning 1 which does not appear to be a documented return value (<a href="https://doc.dpdk.org/api-22.11/rte__ethdev_8h.html#a5f45aabbfbb08ef986caddc70c48df4c">https://doc.dpdk.org/api-22.11/rte__ethdev_8h.html#a5f45aabbfbb08ef986caddc70c48df4c</a>).
I assume because of this I subsequently cannot use ‘rte_eth_timesync_read_tx_timestamp’ as an error occurs.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is a simple breakdown of API calls:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">rte_eal_init()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_count_avail()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_is_valid_port()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_info_get()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_adjust_nb_rx_tx_desc()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_configure(port_id, 1 /* rxrings */, 1 /* txrings */, &port_conf)<o:p></o:p></p>
<p class="MsoNormal">rte_eth_rx_queue_setup()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_tx_queue_setup()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_dev_start()<o:p></o:p></p>
<p class="MsoNormal"><u>rte_eth_timesync_enable() – returns 1<o:p></o:p></u></p>
<p class="MsoNormal">rte_eth_macaddr_get()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_promiscuous_enable()<o:p></o:p></p>
<p class="MsoNormal">rte_eth_link_get()<o:p></o:p></p>
<p class="MsoNormal">…<o:p></o:p></p>
<p class="MsoNormal">rte_eth_tx_burst()<o:p></o:p></p>
<p class="MsoNormal"><u>rte_eth_timesync_read_tx_timestamp() – timespec = 0<o:p></o:p></u></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">offloads:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">portConf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;<o:p></o:p></p>
<p class="MsoNormal">portConf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_MULTI_SEGS;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">portConf.rxmode.offloads |= RTE_ETH_RX_OFFLOAD_TIMESTAMP;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Without rte_eth_timesync_enable and rte_eth_timesync_read_tx_timestamp, the tx burst works as expected. If I ignore the return of rte_eth_timesync_enable and try to read the tx timestamp and the timespec is always 0.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Other info:<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">HW: Connect-6 Dx<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Mlxconfig: REAL_TIME_CLOCK_ENABLE=1<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Sys info: RHEL 4.18.0-477.27.1.el8_8.x86_64<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">DPDK API version 22.11.3<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">sudo ethtool -T <o:p></o:p></p>
<p class="MsoNormal">Time stamping parameters for ens1f0np0:<o:p></o:p></p>
<p class="MsoNormal">Capabilities:<o:p></o:p></p>
<p class="MsoNormal"> hardware-transmit<o:p></o:p></p>
<p class="MsoNormal"> hardware-receive<o:p></o:p></p>
<p class="MsoNormal"> hardware-raw-clock<o:p></o:p></p>
<p class="MsoNormal">PTP Hardware Clock: 1<o:p></o:p></p>
<p class="MsoNormal">Hardware Transmit Timestamp Modes:<o:p></o:p></p>
<p class="MsoNormal"> off<o:p></o:p></p>
<p class="MsoNormal"> on<o:p></o:p></p>
<p class="MsoNormal">Hardware Receive Filter Modes:<o:p></o:p></p>
<p class="MsoNormal"> none<o:p></o:p></p>
<p class="MsoNormal"> all<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">driver: mlx5_core<o:p></o:p></p>
<p class="MsoNormal">version: 23.07-0.5.1<o:p></o:p></p>
<p class="MsoNormal">firmware-version: 22.36.1010 (DEL0000000027)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help or guidance would be much appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards,<o:p></o:p></p>
<p class="MsoNormal">Tim<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>