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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=alessandro@totalwire.it
href="mailto:alessandro@totalwire.it">Alessandro Capucci</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=winpcap-users@winpcap.org
href="mailto:winpcap-users@winpcap.org">winpcap-users@winpcap.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, April 27, 2009 2:57
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Winpcap-users] Packet
lost</DIV>
<DIV><BR></DIV>
<P>Hello,<BR>I'm doing some other test with NPF driver (I'm using driver
directly without WinPCap layer). <BR>I'm generating traffic with PktGen
on a Debian machine with 10GBit fiber card (Intel PRO/10Gbe SR Server
Adapter). I'm generating 4.000.000 packets between 124 and 9014 byte. Max
bandwitdh used is about 3GBit.<BR>On another PC I'm listening with NPF driver
and a very easy application that show statistics. <BR>On this second
machine i recive only 99.70% of packets (3.987.808 pkts) but "<FONT
size=2>stat.bs_drop" are 0. Wher's this 12.192 pkts??? I think that this
pkts arent arrived at the NDIS driver but why ??? Hardware / SO latency ?
ther's a way to know how many pakets are really received from the hardware ???
Or dropped by SO ?</FONT></P><FONT size=2></FONT></BLOCKQUOTE>
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<DIV><FONT size=2>They are dropped by the hardware or by the NIC driver. There
are a number of OIDs that you can query to get some statistics, I would try
and see what happens.</FONT></DIV>
<DIV><FONT size=2>Some of them are</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV></BLOCKQUOTE>
<DIV><FONT size=2>OID_GEN_RCV_ERROR</FONT></DIV>
<DIV><FONT size=2>OID_GEN_RCV_NO_BUFFER</FONT></DIV>
<DIV><FONT size=2>OID_GEN_RCK_OK</FONT></DIV>
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size=2></FONT>
<DIV><BR><FONT size=2>My current device is on a PCI-X bus, next
week I hope to test a PCI-Express version. Do you think that can improve this
performance ?<BR></DIV></FONT></BLOCKQUOTE>
<DIV><FONT size=2>I don't know.</DIV>
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size=2>
<DIV><BR>NPF driver is a NDIS 5 version. Do you think that realize a NDIS 6
drive can improve this performance ?<BR></DIV></BLOCKQUOTE>
<DIV>Are you working on Vista/2008? In that case it might help, but I don't know
to what extent.</DIV>
<DIV> </DIV>
<DIV>Have a nice day</DIV>
<DIV>GV</DIV>
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<DIV><BR>Tnks<BR>Alessandro</FONT></DIV>
<P></P><FONT size=2></FONT>
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