:( Well, i don't know what todo. I've used timeout value within 0 or -1, no luck. Mintocopy, different values, from 8 to 1024, no luck. CPU usage reaches ~100% :(
Can u tell me, please, is it possible that problem may be in the dupplex mode? I've tried to use full and half on 10 mbit/s and 100 mbit/s And again, many thanks for your attention!!! 17.03.2010, в 21:41, Gianluca Varenni написал(а): > WinPcap is optimized for packet capture, at the expense of a jitter > introduced from the time the packet is received by the driver to the time > the packet is received by the user application. This means that the packet > is received by the driver and timestamped, saved into a kernel buffer and > later retrieved by the winpcap-based application. You can reduce this delay > by playing with the timeout and mintocopy values (they are both accessible > through the WinPcap API), obviously at the expense of the CPU load. > > Have a nice day > GV > > > > -------------------------------------------------- > From: "Alimjan Kuramshin" <[email protected]> > Sent: Wednesday, March 17, 2010 11:32 AM > To: <[email protected]> > Subject: Re: [Winpcap-users] Packets capture latency > >> Hello, Gianluca! >> >> Thank you, for your attention and reply. >> >> Well, and within Wireshark too (but this is not quite correct place for >> that). >> >> When i receive one packet from my device i'm emmideatly send back received >> packet back(for testing) >> and using oscilloscope watch for my laptop ethernet card TX+ and TX- pins. >> >> Also, i've tried to use different handles(pcap_open) for capturing/sening >> data, no changes the same result. :( >> >> 17.03.2010, в 20:06, Gianluca Varenni написал(а): >> >>> What is the original delay between the packets? >>> >>> Are you looking at the timestamps with wireshark? >>> >>> Have a nice day >>> GV >>> >>> -------------------------------------------------- >>> From: "Alimjan Kuramshin" <[email protected]> >>> Sent: Wednesday, March 17, 2010 9:58 AM >>> To: <[email protected]> >>> Subject: [Winpcap-users] Packets capture latency >>> >>>> Hello, everyone! My name is Alimjan and i'm developing custom board with >>>> the ethernet device and i've got some problem >>>> with capturing data from it .. >>>> >>>> I'm using Notebook Asus G1S with Windows XP + SP3 installed to connect >>>> to >>>> my board. Using WinPcap(4.1.1), i'm capture data from the board. So, >>>> i've >>>> found that delay between the captured packets is a very 'vary' i mean >>>> that >>>> it has huge spread, e.g, >>>> at 10 mbits/s i've got 45-70 us delay, it is normal i gues, but some >>>> times >>>> this delay grow up to 3-7 ms (milliseconds), for example, distance >>>> between >>>> packets: 45 us, 46 us, 50 us, 47 us and so on.. then >>>> 4 ms, 7 ms, 1 ms, and then again 53 us, 47 us and so on, the repeat... >>>> Number of 'normal' delay is also very 'vary', delay may appear in a >>>> different numbers of received packets, no logic :( >>>> >>>> My laptop is directly connected to my board e.g. cross TX->RX, RX->TX, >>>> no >>>> hubs or something. Also using oscilloscope connected to the TX+ and TX- >>>> lines i've found that it is no delay between packet that my custom board >>>> (device) have send. Anybody please, help me to solve this situation, >>>> may be i'm doing something wrong? >>>> >>>> P.S. i'm using winpcap exapmle code to capture the packets with callback >>>> method and within pcap_next_ex. >>>> >>>> P.P.S i'm sorry for my english spelling skill, i hope that you can >>>> understand my. >>>> >>>> Many thanks, bye.. >>>> >>>> _______________________________________________ >>>> Winpcap-users mailing list >>>> [email protected] >>>> https://www.winpcap.org/mailman/listinfo/winpcap-users >>> >>> _______________________________________________ >>> Winpcap-users mailing list >>> [email protected] >>> https://www.winpcap.org/mailman/listinfo/winpcap-users >> >> _______________________________________________ >> Winpcap-users mailing list >> [email protected] >> https://www.winpcap.org/mailman/listinfo/winpcap-users >> > _______________________________________________ > Winpcap-users mailing list > [email protected] > https://www.winpcap.org/mailman/listinfo/winpcap-users _______________________________________________ Winpcap-users mailing list [email protected] https://www.winpcap.org/mailman/listinfo/winpcap-users
