<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:"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:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:"Courier New";}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></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-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have 1.5.1 EtherCAT Master running on two machines: one is Intel-Atom based with two e1000e network interfaces, the other is a core i7 with an Intel 82579LM Ethernet interface. The operating system is Ubuntu 10.04LTS running the 2.6.33.7.2-rt30
kernel (RT PREEMPT).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A year ago, I was able to get the EtherLAB EtherCAT master up and running on similar computers with frame rates around 2000/sec. However, despite running the same program from a year ago with the same hardware, I can’t get the frame rate
to exceed 250/sec on either machine. With both the generic and e1000e drivers, the results are exactly the same (which is odd).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I saw this in the mailing list archives:<o:p></o:p></p>
<p class="MsoNormal">[snip]<o:p></o:p></p>
<p class="MsoNormal" style="text-align:justify;line-height:14.25pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#222222">Now as I understand the product to get an update rate of 10 micro<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:14.25pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#222222">seconds for a small number of IO (that's what we have) we need to get<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:14.25pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#222222">the tx frame rate much higher than the standard 250/sec.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[/snip]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is the frame rate capped at 250/sec? Is there a setting I need to change, or some configuration I can modify? I suspect there is something easy and stupid I am overlooking, but I’m at a loss.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any feedback.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Tom<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>