<p dir="ltr">Ragu,</p>
<p dir="ltr">   Please ensure that you are getting cache coherence right. That is, there are no packets crossing the cache lines.<br>
FWIW, in a life ago, i got a problem with an eth driver where the descriptors ring was not properly sized (ie no modulus cache line).</p>
<div class="gmail_quote">El 29/6/2015 17:23, "ragu nath" <<a href="mailto:ragunath3252@gmail.com">ragunath3252@gmail.com</a>> escribió:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks Marcos. I will let you know if there is any progress.<div><br></div><div>Regards,</div><div>Ragunath</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 30, 2015 at 12:50 AM, Marcos Díaz <span dir="ltr"><<a href="mailto:marcos.diaz@tallertechnologies.com" target="_blank">marcos.diaz@tallertechnologies.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div>I'm sorry but in the development of the porting of LWIP i couldn't give any more time to the task, so when I reached that stage I just disabled the cache.</div><div>I will try to give some time to that to see if i can help you, and of course, let me know if you find something.</div><div>Sorry again</div></div><div class="gmail_extra"><div><div><br><div class="gmail_quote">On Mon, Jun 29, 2015 at 3:16 PM, ragu nath <span dir="ltr"><<a href="mailto:ragunath3252@gmail.com" target="_blank">ragunath3252@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Marcos,<br>
<br>
I am working on porting ethernet driver for Beaglebone black from<br>
FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and<br>
got it working.<br>
<br>
But there was one issue I faced, similar to the one you mentioned in<br>
our earlier correspondence (regarding lwIP). You mentioned that the<br>
system crashes if cache is enabled.<br>
<br>
In my case, the Address Lookup Engine (ALE) is getting corrupted if<br>
cache is enabled. Because of this packet transmission failed sending<br>
out random junk packets. With cache disabled, networking is working.<br>
<br>
I am looking for options other than disabling cache as a whole. Is<br>
there any other option available?  Can you share the details of any of<br>
the things you tried and found not working?<br>
<br>
<br>
Thanks,<br>
Ragunath<br>
</blockquote></div><br><br clear="all"><div><br></div></div></div>-- <br><div><div dir="ltr"><span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">______________________________</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><a href="http://www.tallertechnologies.com" target="_blank"><img src="http://www.tallertechnologies.com/templates/tallertechnologies/images/signature.png" width="200" height="78"></a></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><b style="font-weight:normal"><br><span style="font-size:16px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"></span></b></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><font face="verdana, sans-serif" size="4">Marcos Díaz</font></span></p><p dir="ltr" style="margin-top:0pt;margin-bottom:0pt"><font color="#000000" face="verdana, sans-serif" size="2"><span style="line-height:17px;white-space:pre-wrap">Software Engineer</span></font></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><b style="font-weight:normal"><br><span style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"></span></b></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><font face="arial, helvetica, sans-serif" size="1">San Lorenzo 47, 3rd Floor, Office 5</font></span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><font face="arial, helvetica, sans-serif" size="1">Córdoba, Argentina </font></span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><b style="font-weight:normal"><font face="arial, helvetica, sans-serif" size="1"><br><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"></span></font></b></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><font face="arial, helvetica, sans-serif" size="1"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:bold;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Phone:</span><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"> +54 351 4217888 / +54 351 4218211/ </span><span style="color:rgb(0,0,0);line-height:12px;white-space:pre-wrap">+54 351 7617452</span></font></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><font face="arial, helvetica, sans-serif" size="1"><span style="color:rgb(0,0,0);background-color:transparent;font-weight:bold;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Skype:</span><span style="color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"> markdiaz22</span></font></p><div><span style="font-size:11px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br></span></div></span></div></div>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr">ragu</div></div>
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</blockquote></div>