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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I didn’t say that I handle million packets per second. I said that I handle millions of packets with a mechanism similar to WinPcap (i.e. receiving one packet at a time with a call similar to pcap_next_ex). <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Consider that at those rates, sometimes the limitation is not just WinPcap, it’s the NIC and NIC driver, that are sometimes not optimized to properly handle small packets. In general the idea of using multiple threads and capture instances, each of them capturing a subset of the traffic, is a winning one, as long as you are able to split the traffic evenly among threads.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Have a nice day<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>GV<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> winpcap-users-bounces@winpcap.org [mailto:winpcap-users-bounces@winpcap.org] <b>On Behalf Of </b>Neil Powell<br><b>Sent:</b> Thursday, March 24, 2011 4:33 PM<br><b>To:</b> winpcap-users@winpcap.org<br><b>Subject:</b> Re: [Winpcap-users] Followup question on Old Post<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB>Gianluca,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>You mention that you can get WinPCAP to handle millions of packets a second. I’d be very interested to understand the basic idea on how you got WinPCAP to do this. I have developed an application that currently handles 100,000 packets per second; now I need to scale it up to handle around a 1,000,000 packets per second or more. The packet size can range from 64bytes to 1514bytes; but typically around 100bytes. I too have been thinking about using multiple kernel buffers and multiple threads each with a specific filter set. Is this the ideal way to get the best performance from WinPCAP? If not what philosophy would you suggest? . <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Thanks in advance<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Neil Powell<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div></body></html>