Robert, Loris; First thank you much for your feedback. The calls I'm using for sending packets out are:
PacketSetNumWrites and subsequently PacketSendPacket, which sends the same packet the number of times indicated by the first API call. I also run the TG example application which comes with WinPcap development package. The rates of traffic I measured using a wireless sniffer(Airopeek) on a 802.11b NIC were as follows: Packet Size FPS --------------------- 64 Bytes ~950 128 Bytes ~900 256 Bytes ~820 512 Bytes ~600 1024 Bytes ~530 These were average rates taken over 25000 frame traffic. The throughput limit of a typical wireless NIC is ~6.2Mbps. The throughput I'm getting above, especially with smaller sized frames is significantly less. -Areg -----Original Message----- From: Loris Degioanni [mailto:[EMAIL PROTECTED] Sent: Monday, August 11, 2003 11:29 AM To: [EMAIL PROTECTED] Subject: Re: [WinPcap-users] Limitation with Transmitting frames using WinPcap What method are you using to send the packets? What is the performance on your machine of the sendcap and tg programs, provided in the WinPcap developer's pack? Loris ----- Original Message ----- From: "Areg Alimian" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, August 11, 2003 5:12 AM Subject: [WinPcap-users] Limitation with Transmitting frames using WinPcap I'm using npf.sys to send ethernet II frames out ethernet NIC. I did some extensive measurements with the transmission rate and it appears that the maximum frame rate I can get with 64 byte frames is ~600 frames per second. Increasing the frame size to 1024 Bytes also allows my to send about 500+ frames per second. Is this a limitation of the NPF driver? If I increase the driver buffer size for queueing frames, would it affect the rates? The measurements were taken on a 1.6Mhz Laptop running Win2K with 500Mb of RAM. Any input would be much appreciated. -Areg Alimian ================================================================== This is the WinPcap users list. It is archived at http://www.mail-archive.com/[EMAIL PROTECTED]/ To unsubscribe use mailto: [EMAIL PROTECTED] ================================================================== ================================================================= This is the WinPcap users list. It is archived at http://www.mail-archive.com/[EMAIL PROTECTED]/ To unsubscribe use mailto: [EMAIL PROTECTED] =================================================================
