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Thanks Mark,<br>
<br>
I started with WinSock, but it is not capable of getting 6 GB/s data
transfer speeds, or at least I could not make it getting that amount of
data per second. Winpcap does it for me. However, sometimes I need only
one set of 64 packets received in one go (that is one image of my
detector sent to PC) and I get stalled in the middle of the transfer
until timeout occurs.<br>
<br>
Anton<br>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Ho
Anton,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">My
first question to you would be:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">WHY
are you using WinPcap to receive UDP packets?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">This
sounds like a job for a winsock application….<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><!--[endif]--><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Mark
Pizzolato<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<div
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:winpcap-users-bounces@winpcap.org">winpcap-users-bounces@winpcap.org</a>
[<a class="moz-txt-link-freetext" href="mailto:winpcap-users-bounces@winpcap.org">mailto:winpcap-users-bounces@winpcap.org</a>] <b>On Behalf Of </b>Anton
Tremsin<br>
<b>Sent:</b> Friday, January 28, 2011 11:50 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:winpcap-users@winpcap.org">winpcap-users@winpcap.org</a><br>
<b>Subject:</b> [Winpcap-users] Delay receiving packets - wrong
functionality ofpcap_setmintocopy()<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I hope someone can help my problem receiving
packets in Windows7<br>
<br>
I am sending data by UDP packets from an FPGA through 10GB card
(Chelsio). Using VC++ 2010 to compile code to receive them. <br>
<br>
All packets arrive, no losses seen, but the problem is with the proper <b>operation
of pcap_setmintocopy() function.</b> <br>
<br>
<b>I send 64 packets with 8234 bytes each. Receiving them through
pcp_next_ex() and I only get 31 packets (sometimes 62, sometimes 47, 50
packets) before the timeout occurs. After timeout the rest of the
packets arrives. <br>
</b><br>
I set the minimum amount of data in the kernel buffer that causes a
read from the application to return (unless the timeout expires) to be
1 byte or it to be all 8234x64 bytes, no difference. Looks like the
setmintocpy function has no effect on my kernel buffer to be copied to
my application. If I send another set of 64 packets - data arrives into
pcp_next_ex(), still only in lamp of 31 (62, 47,50) packets <br>
<br>
That is a big problem for my application.<br>
<br>
<b>Is there anything I am doing wrong or need to change something in
the system/driver to make setmintocopy function to operate properly?<br>
</b><br>
Thanks a lot for your help, <br>
<br>
Anton Tremsin<br>
<br>
<br>
<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Anton S. Tremsin, Ph.D.<o:p></o:p></pre>
<pre>Space Sciences Laboratory<o:p></o:p></pre>
<pre>University of California at Berkeley<o:p></o:p></pre>
<pre>Berkeley, CA 94720<o:p></o:p></pre>
<pre>Tel: (510) 642 4554<o:p></o:p></pre>
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<br>
<br>
<pre class="moz-signature" cols="72">--
Anton S. Tremsin, Ph.D.
Space Sciences Laboratory
University of California at Berkeley
Berkeley, CA 94720
Tel: (510) 642 4554
</pre>
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